Roy Helge Gabrielsen

• Olesen, Odleiv; Gabrielsen, Roy Helge; Slagstad, Trond; Gernigon, Laurent; Bjørlykke, Arne & Engvik, Ane [Vis alle 7 forfattere av denne artikkelen] (2025). Caledonian basement deformation related to oblique continent–continent collision in Scandinavia – insight gained from the interpretation of potential field data. Geological Society Special Publication. ISSN 0305-8719. 557(1), s. 195–227. doi: https:/www.lyellcollection.org/doi/full/10.1144/SP557-2024-113. Fulltekst i vitenarkiv Vis sammendrag

  The tectonic status, the mode of Caledonian deformation and the transport distance of the Precambrian units on the Fennoscandian Shield that constitute the so-called tectonic windows within the realm of the Scandinavian Caledonian nappe pile have long been a subject of dispute. It has been argued for several hundred kilometres of eastward transport for some of these tectonic units, whereas parautochthonous to autochthonous positions have also been suggested. In this contribution, geophysical data have been studied to shed light on this controversy. A dominant regional NNW–SSE to north–south structural grain of Precambrian origin extends beneath the Caledonian nappes. Indeed, similar structural patterns appear in several of the tectonic windows within the orogen. However, magnetic anomalies in southern Norway and the Nordland area show an apparent c. 90° counterclockwise rotation into the Caledonian trend along a line from Nordfjord in western Norway to Senja in northern Norway, whereas the anomalies in Finnmark (northernmost Norway), seem to be rotated clockwise along a line from Kvænangen to Porsangerfjorden. We suggest that this pattern extending through the Caledonides likely represents a boundary between two crustal domains with different Caledonian reworking. The eastern domain demonstrates less extensive modification during the Caledonian continent–continent collision. Some thrusts within basement windows in the eastern domain accommodated transport of a few tens of kilometres, revealing a parautochthonous status for most of these windows. Interpretations of aeromagnetic and gravity data have shown that the Caledonian nappes occurring along detachments extend to a maximum depth of c. 9 km below sea-level. The thickest nappe piles occur along the late Caledonian detachments. The eastern basement domain with minor Caledonian deformation has a thinner nappe stack (up to 4–5 km below). Our combined interpretations also show the need to modify the tectonostratigraphy of the northern Scandinavian Caledonides. The Lower Laksefjord Nappe in Finnmark, for instance, is interpreted as a parautochthonous window into the Precambrian basement and is not part of the Laksefjord Nappe Complex that has been transported hundreds of kilometres.

• Faleide, Jan Inge; Wong, Po Wan; Hassaan, Muhammad; Gabrielsen, Roy Helge; Abdelmalak, Mohamed Mansour & Planke, Sverre [Vis alle 9 forfattere av denne artikkelen] (2024). West Barents Sheared Margin Composite Tectono-Sedimentary Element, Norwegian Greenland Sea and Fram Strait. Geological Society of London Memoirs. ISSN 0435-4052. 57(1). doi: 10.1144/M57-2023-19. Fulltekst i vitenarkiv Vis sammendrag

  The West Barents Sheared Margin developed in response to break-up and initial opening of the NE Atlantic and links to the Arctic Eurasia Basin. It consists of three first-order segments: (1) a southern sheared margin segment bounding the deep SW Barents Sea basins; (2) a central rifted margin segment west of Bjørnøya; and (3) a northern initially sheared margin segment that was later exposed to oblique extension west of Svalbard. The geometry of the margin included releasing, as well as restraining, bends that inflicted substantial impact on the deformation along the sheared margin. In light of structural, stratigraphic and sedimentological investigations in recent years, the first-order three-fold subdivision of the Barents shear margin has been strengthened and expanded on. It has become even clearer that this subdivision reflects the margin geometry and the shifting far-field and local stress configurations. Prior to the final stages of rifting and break-up of the NE Atlantic in the Paleogene, the study area was part of a broad and extensive basin province comprising deep sedimentary basins. The line of break-up cut diagonally across the regional basin province so that different parts of it are now located in the mid-Norwegian margin, in the NE Greenland margin and in the SW Barents Sea. These areas share a long and complex history of multiple rift phases throughout Late Paleozoic and Mesozoic times, and information from these areas is integrated into the description of the West Barents Sheared Margin Composite Tectono-Sedimentary Element. The marginal basins in the SW Barents Sea are the least explored area on the Norwegian continental shelf and sporadic exploration activity has had limited success. A petroleum potential still exist that will be elaborated in renewed upcoming activity.

• Gabrielsen, Roy Helge & Olesen, Odleiv (2024). The Concept of Lineaments in Geological Structural Analysis; Principles and Methods: A Review Based on Examples from Norway. Geomatics. 4(2), s. 189–212. doi: 10.3390/geomatics4020011. Fulltekst i vitenarkiv Vis sammendrag

  Application of lineament analysis in structural geology gained renewed interest when remote sensing data and technology became available through dedicated Earth observation satellites like Landsat in 1972. Lineament data have since been widely used in general structural investigations and resource and geohazard studies. The present contribution argues that lineament analysis remains a useful tool in structural geology research both at the regional and local scales. However, the traditional “lineament study” is only one of several methods. It is argued here that structural and lineament remote sensing studies can be separated into four distinct strategies or approaches. The general analyzing approach includes general structural analysis and identification of foliation patterns and composite structural units (mega-units). The general approach is routinely used by most geologists in preparation for field work, and it is argued that at least parts of this should be performed manually by staff who will participate in the field activity. We argue that this approach should be a cyclic process so that the lineament database is continuously revised by the integration of data acquired by field data and supplementary data sets, like geophysical geochronological data. To ensure that general geological (field) knowledge is not neglected, it is our experience that at least a part of this type of analysis should be performed manually. The statistical approach conforms with what most geologists would regard as “lineament analysis” and is based on statistical scrutiny of the available lineament data with the aim of identifying zones of an enhanced (or subdued) lineament density. It would commonly predict the general geometric characteristics and classification of individual lineaments or groups of lineaments. Due to efficiency, capacity, consistency of interpretation methods, interpretation and statistical handling, this interpretative approach may most conveniently be performed through the use of automatized methods, namely by applying algorithms for pattern recognition and machine learning. The focused and dynamic approaches focus on specified lineaments or faults and commonly include a full structural geological analysis and data acquired from field work. It is emphasized that geophysical (potential field) data should be utilized in lineament analysis wherever available in all approaches. Furthermore, great care should be taken in the construction of the database, which should be tailored for this kind of study. The database should have a 3D or even 4D capacity and be object-oriented and designed to absorb different (and even unforeseen) data types on all scales. It should also be designed to interface with shifting modeling tools and other databases. Studies of the Norwegian mainland have utilized most of these strategies in lineament studies on different scales. It is concluded that lineament studies have revealed fracture and fault systems and the geometric relations between them, which would have remained unknown without application of remote sensing data and lineament analysis.

• Dypvik, Henning; Stokkebekk, Even; Nordeng, Eirik N.; Småkasin, Rikke Øya; Sørhus, Kathrine & Morton, Andrew C. [Vis alle 7 forfattere av denne artikkelen] (2023). The Neoproterozoic Valdres Group-depositional conditions and stratigraphical developments in the Mellane and Grønsenn-knippa sections, Valdres, Southern Norway. Norwegian Journal of Geology. ISSN 2387-5844. 103(2), s. 1–37. doi: 10.17850/njg103-2-2. Fulltekst i vitenarkiv Vis sammendrag

  The youngest part of the Valdres Group of south-central Norway (mainly the Neoproterozoic Rundemellen unit, Tonian – Cryogenian?) has been sedimentologically and stratigraphically studied and sampled at the Skarvemellen and Rundemellen sections at Mellane (Øystre Slidre) and Grønsennknippa (Vestre Slidre). The goal was to shed light on the depositional conditions and possible stratigraphical correlations to time-equivalent formations in the better-known Hedmark Group to the east. It is hoped that this approach will also help establish an improved basis to understand the related metamorphic Valdres Group units to the west and north of the study area. Depositional environments have been interpreted from sedimentary field data and observations, supported by petrographical, geochemical and mineralogical analyses. Coarse clastic sedimentary rocks of braided stream/alluvial fan dominates the Valdres Group. The studied succession at Grønsennknippa starts with massive pebbly conglomerates with well-rounded clasts and interbedded sandstone units, unconformably overlying crystalline basement. This package is overlain by sandstones of various alluvial affinity, interrupted only by one conglomerate horizon and one diamictite unit. The latter is possibly correlative to the diamictite recognised in the Valdres Group at Mellane, and may represent a tillite correlatable to the Moelv Tillite (Marinoan glaciation). The Mellane section is more dominated by sandstones and subordinate conglomerates than those at Grønsennknippa. Mineralogical composition and field observations of the Grønsennknippa and Mellane sections indicate relatively short transport distances of the texturally immature sediments. The petrography also reflects a later metamorphic phase (varying greenschist facies), overprinting the original mineralogy. Comparison between the Valdres Group at Mellane and Grønsennknippa sections indicates that the Grønsennknippa succession exhibits an originally more immature mineralogical and textural signature than those at Mellane. The Grønsennknippa sections are more feldspar-rich and dominated by coarse-grained detritus. This may reflect different positions with respect to the source area/basin margin. In this study, the Valdres Group at Grønsennknippa and Mellane is compared with selected fluvial/alluvial formations of the Hedmark Basin, revealing comparable depositional environments and stratigraphic developments. The occurences of possible tillites at stratigraphical levels comparable to the Moelv Tillite are of particular interest. The petrographical composition and heavy mineral distribution support comparable sediment sources from mainly Sveconorwegian formations in both Valdres and Hedmark basins.

• Gabrielsen, Roy Helge; Gianennas, Pangiptis, A.; Sokoutis, Dimitrios; Willingshofer, Ernst; Hassaan, Muhammad & Faleide, Jan Inge (2023). Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin. Solid Earth (SE). ISSN 1869-9510. 14(9), s. 961–983. doi: 10.5194/se-14-961-2023. Fulltekst i vitenarkiv Vis sammendrag

  The Barents Shear Margin separates the Svalbard and Barents Sea from the North Atlantic. During the break-up of the North Atlantic the plate tectonic configuration was characterized by sequential dextral shear, extension, and eventually contraction and inversion. This generated a complex zone of deformation that contains several structural families of overlapping and reactivated structures. A series of crustal-scale analogue experiments, utilizing a scaled and stratified sand–silicon polymer sequence, was used in the study of the structural evolution of the shear margin. The most significant observations for interpreting the structural configuration of the Barents Shear Margin are the following. 1. Prominent early-stage positive structural elements (e.g. folds, push-ups) interacted with younger (e.g. inversion) structures and contributed to a hybrid final structural pattern. 2. Several structural features that were initiated during the early (dextral shear) stage became overprinted and obliterated in the subsequent stages. 3. All master faults, pull-apart basins, and extensional shear duplexes initiated during the shear stage quickly became linked in the extension stage, generating a connected basin system along the entire shear margin at the stage of maximum extension. 4. The fold pattern was generated during the terminal stage (contraction–inversion became dominant in the basin areas) and was characterized by fold axes striking parallel to the basin margins. These folds, however, strongly affected the shallow intra-basin layers. The experiments reproduced the geometry and positions of the major basins and relations between structural elements (fault-and-fold systems) as observed along and adjacent to the Barents Shear Margin. This supports the present structural model for the shear margin.

• Torgersen, Espen; Gabrielsen, Roy Helge; Ganerød, Morgan; Lelij, Roelant van der; Schönenberger, Jasmin & Nystuen, Johan Petter [Vis alle 7 forfattere av denne artikkelen] (2022). Repeated brittle reactivations of a pre-existing plastic shear zone: combined K-Ar and ⁴⁰Ar-³⁹Ar geochronology of the long-lived (>700 Ma) Himdalen-Orje Deformation Zone, SE Norway. Geological Magazine. ISSN 0016-7568. 159(11-12), s. 2110–2131. doi: 10.1017/S0016756822000966. Fulltekst i vitenarkiv Vis sammendrag

  Brittle reactivation of plastic shear zones is frequently observed in geologically old terranes. To better understand such deformation zones, we have studied the >700 Ma long structural history of the Himdalen–Ørje Deformation Zone (HØDZ) in SE Norway by K–Ar and 40Ar–39Ar geochronology, and structural characterization. Several generations of mylonites make up the ductile part of HØDZ, the Ørje Shear Zone. A 40Ar–39Ar white mica plateau age of 908.6 ± 7.0 Ma constrains the timing of extensional reactivation of the Ørje mylonite. The mylonite is extensively reworked during brittle deformation events by the Himdalen Fault. 40Ar–39Ar plateau ages of 375.0 ± 22.7 Ma and 351.7 ± 4.4 Ma from pseudotachylite veins and K–Ar ages of authigenic illite in fault gouge at c. 380 Ma are interpreted to date initial brittle deformation, possibly associated with the Variscan orogeny. Major brittle deformation during the Early–Mid Permian Oslo Rift is documented by a 40Ar–39Ar pseudotachylite plateau age of 294.6 ± 5.2 Ma and a K–Ar fault gouge age of c. 270 Ma. The last datable faulting event is constrained by the finest size fraction in three separate gouges at c. 200 Ma. The study demonstrates that multiple geologically significant K–Ar ages can be constrained from fault gouges within the same fault core by combining careful field sampling, structural characterization, detailed mineralogy and illite crystallinity analysis. We suggest that initial localization of brittle strain along plastic shear zones is controlled by mechanical anisotropy of parallel-oriented, throughgoing phyllosilicate-rich foliation planes within the mylonitic fabric.

• Narum, Bjørn Magnus; Gabrielsen, Roy Helge & Corfu, Fernando (2022). Tectonometamorphic history of the Østfold Gneiss Complex, Idefjorden lithotectonic unit, southeastern Norway. Norwegian Journal of Geology. ISSN 2387-5844. 101. doi: 10.17850/njg101-4-3. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Roberts, David; Gjelsvik, Tone; Sygnabere, Trond Olav; Hassaan, Muhammad & Faleide, Jan Inge (2022). Double-folding and thrust-front geometries associated with the Timanian and Caledonian orogenies in the Varanger Peninsula, Finnmark, North Norway. Journal of the Geological Society. ISSN 0016-7649. 179(6). doi: 10.1144/jgs2021-153. Fulltekst i vitenarkiv Vis sammendrag

  On Varanger Peninsula, the roughly NW–SE-trending Trollfjorden–Komagelva Fault Zone separates Neoproterozoic successions that accumulated in a shallow-marine platformal domain to the SW of the fault from deepmarine basinal to deltaic sediments to the NE. In Ediacaran time the fault scarp acted as a buttress in a period of basinal inversion during the top-to-the-SW, contractional Timanian orogeny. During the subsequent, top-to-the-SE to -ESE, polyphase Caledonian orogenesis the fault acted as a dextral strike-slip megafracture and lateral ramp. In the northeastern terrane, Timanian and Caledonian fold interference has produced several examples of double-folding and intersecting cleavages. In the southwestern terrane, the Lower Allochthon Gaissa Thrust Belt overlies the Parautochthon, below which a 45 km long deformation front has been mapped. Tectonic shortening within this frontal zone varies from top-to-the-SSE in the west to topto-the-ESE in the east. Imbricate thrust sheets disrupt the succession in the northeastern terrane, below which a floor décollement is speculated to emerge as a frontal fault along a prominent footwall of the precursor fault that acted on the seabed in outermost Varangerfjorden. By use of potential field data, the Caledonian structures on Varanger can be followed to the north into the Barents Sea where the nappe pile in the pre-Carboniferous basement reaches a thickness of several kilometres.

• Warvik, Kenneth; Ringstad, Håkon Blaker; Augland, Lars Eivind; Corfu, Fernando & Gabrielsen, Roy Helge (2021). The Revsegg and Kvitenut allochthons, Scandinavian Caledonides: origins and evolution in the Caledonian Wilson cycle. Journal of the Geological Society. ISSN 0016-7649. 179(3). doi: 10.1144/jgs2021-062. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Effects of basement structures and Carboniferous basin configuration on evaporite distribution and the development of salt structures in Nordkapp Basin, Barents Sea—Part I. Basin Research. ISSN 0950-091X. 33(4), s. 2474–2499. doi: 10.1111/bre.12565. Fulltekst i vitenarkiv Vis sammendrag

  Potential field data, reprocessed regional 2D seismic reflection profiles and 3D seismic tied to wells were used to study the late Devonian-Permian development of the Nordkapp Basin in Barents Sea. The composite basin can be subdivided into the northeastern, central and southwestern segments that developed above a basement that contains elements of the Timanian and Caledonian regimes. The transition between the Timanian and Caledonian structures is positioned below the central basin segment. The rheological properties, locations, orientations and interaction of inherited structures together with two subsequent extensional phases, defined the presalt rift architecture and gave rise to seven subbasins within Nordkapp Basin. During the late Devonian-early Carboniferous NE-SW oriented extension, the basin consisted of two regional half-grabens (northern and southern) separated by an interbasin ridge. During the late Carboniferous, the shift of extension direction to NW-SE orientation reshaped the two regional half-grabens. In particular, an interbasin transfer zone divided the northern regional half-graben by separating its hinged-margin portion (incipient northeastern segment) from the deeper part (incipient central segment). At the same time, the elevated interbasin ridge separated the incipient central and southwestern segments. Internally within the seven subbasins, the evolving structural elements including cross-cutting master faults and structural highs have influenced the deposition and character of the Pennsylvanian-lower Permian layered evaporite sequence and the distribution of subsequent salt structures. We suggest that the synrift to early postrift processes, relative depth of each subbasin, arrangement of the structural highs and depositional palaeo-environment all controlled the thickness and facies of the layered evaporite sequence. The latter in combination with the presalt architecture comprised a laterally varying in thickness and character substratum that during the earliest Triassic influenced the sediment routings and deposition of the progradational system arriving in Nordkapp Basin. The study outcomes are pertinent and applicable to other salt-influenced rift basins worldwide.

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge; Tsikalas, Filippos & Grimstad, Silje (2021). Interplay between base-salt relief, progradational sediment loading and salt tectonics in the Nordkapp Basin, Barents Sea – Part II. Basin Research. ISSN 0950-091X. 33(6), s. 3256–3294. doi: 10.1111/bre.12602. Fulltekst i vitenarkiv Vis sammendrag

  Reprocessed, regional, 2D seismic reflection profiles, 3D seismic volumes and well data (exploration and shallow boreholes), combined with 2D structural restorations and 1D backstripping were used to study the post-salt evolution of the Nordkapp Basin in Barents Sea. The post-salt evolution took place above a pre-salt basement and basin configuration affected by multiple rift events that influenced the depositional facies and thickness of Pennsylvanian-lower Permian-layered evaporite sequence. Initially, regional mid-late Permian extension reactivated pre-salt Carboniferous faults, caused minor normal faulting in the Permian strata and triggered slight salt mobilization towards structural highs. The main phase of salt mobilization occurred during earliest Triassic when thick and rapidly prograding sediments entered from the east into the Nordkapp Basin. In the early-mid-Triassic, the change in the direction of progradation and sediment entry-points shifted to the NW led to rotation of the earlier-formed mini-basins and shift of dominant salt evacuation direction to the south. The prograding sediment influx direction, sediment transport velocity and thickness influenced the dynamics of the early to late passive diapirism, salt expulsion and depletion along the strike of the basin. The basin topography resulting from salt highs and mini-basin lows strongly affected the Triassic progradational fairways and determined the distinct sediment routing patterns. Minor rejuvenation of the salt structures and rotation of the mini-basins took place at the Triassic–Jurassic transition, due to far-field stresses caused by the evolving Novaya Zemlya fold-and-thrust belt to the east. This rejuvenation influenced the sediment dispersal routings and caused formation of dwarf secondary mini-basins. The second and main rejuvenation phase took place during likely early-mid-Eocene when propagated far-field stresses from the transpressional Eurekan/Spitsbergen orogeny to the NW inverted pre-salt normal faults, reactivated the structural highs and rejuvenated the salt structures. The studied processes and study outcomes can be applicable to other evaporite-dominated basins worldwide.

• Gabrielsen, Roy Helge; Skurtveit, Elin & Faleide, Jan Inge (2021). Caprock integrity of the Draupne formation, Ling depression, North Sea, Norway. Norwegian Journal of Geology. ISSN 2387-5844. 100(4). doi: 10.17850/njg100-4-2. Fulltekst i vitenarkiv Vis sammendrag

  The Draupne Formation is the most important source and cap rock for North Sea hydrocarbon plays. It also provides the primary seal for potential CO2 storage on the Norwegian Continental Shelf, but it has been a concern that in situ fracturing may compromise its sealing capacity on both regional and local scales. To evaluate its integrity, mudrocks of the Draupne Formation were cored for mapping and analysis of fracture systems in well 16/8-3S. This well was drilled in the Ling Depression of the central North Sea. The background permeability of the Draupne Formation ranges between 10-6 and 10-3 mD, making it a good caprock for carbon sequestration (CCS). In the 16/8-3S well site, the Draupne Formation is affected by four fracture populations. Fracture population FP1 consists of bedding-parallel fractures reflecting a mechanical strength anisotropy associated with deposition, and probably exaggerated by the effects of diagenetic processes. Fracture population FP2 consists of high-angle pedogenic fractures likely reflecting deformation associated with deposition and burial. Fracture population FP3 consists of inclined (35–600) fractures decorated by different types of slickenlines, whereas Fracture population FP4 is regarded as comprising drilling- and core handling-induced fractures. The bedding-parallel FP1 population is likely to remain closed for fluid conductivity at depth since the stress caused by the overburden likely exceeds the fluid pressure at the top reservoir level. The FP2 is lithostratigraphically restricted and stratabound and therefore cannot contribute significantly to a three-dimensionally connected network. Potential fluid flow is therefore likely to be constrained to the inclined tectonic fracture population (FP3), which is unlikely to connect in three dimensions due to its low fracture frequency unless the FP1 population had become activated by processes such as unloading. Substantial leakage through the Draupne Formation mudstone related to the observed fracture sets is therefore considered unlikely. It is emphasised that injection of CO2 would require fluid pressure control at the reservoir-caprock interface to avoid opening of existing fracture populations, induce (new) or reactivate old fracture systems and thereby corrupting the integrity of the seal.

• Kalani, Mohsen; Faleide, Jan Inge & Gabrielsen, Roy Helge (2020). Palaeozoic-Mesozoic tectono-sedimentary evolution and magmatism of the Egersund Basin area, Norwegian central North Sea. Marine and Petroleum Geology. ISSN 0264-8172. 122. doi: 10.1016/j.marpetgeo.2020.104642. Fulltekst i vitenarkiv Vis sammendrag

  This study focuses on the tectonic evolution of the greater Egersund Basin in the Norwegian central North Sea, with special emphasis on Late Paleozoic extensional tectonics following Caledonian collapse and the Variscan Orogeny, and the impact of the basement structural grain on this evolution. The Caledonian collapse likely resulted in development/rejuvenation of the deepest E-W trending structures/depocenters by Late Devonian time. Thus, a late Devonian-?early Carboniferous age can be assigned to the initial extension, which was associated with the development of an E-W striking basin system, to be overprinted by N–S extensional structures of similar age. A phase of regional magmatism at the Carboniferous-Permian transition (≈300 Ma) may be associated with a large igneous province centred on the Skagerrak area. Faulting during late Carboniferous-early Permian was minor within the study area as reflected by uniform sedimentary thicknesses of the uppermost Carboniferous and lower Permian sequences. Major normal faults, mainly trending N–S, were active during a late Permian-Early Triassic rift phase affecting large parts of the central and northern North Sea area. A later phase of extension was initiated in late Middle Jurassic time and the Egersund Basin proper formed during the Late Jurassic-Early Cretaceous. The depocenters that developed during this phase was influenced by the deep Late Paleozoic (sub-salt) structural grain, including strike-slip movements along the Sorgenfrei-Tornquist Zone. Later events include mild inversion along the northern flank of the Egersund Basin, possibly as a Late Cretaceous response to far-field Alpine compression, and Cenozoic regional tilting.

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2020). Architecture of the evaporite accumulation and salt structures dynamics in Tiddlybanken Basin, southeastern Norwegian Barents Sea. Basin Research. ISSN 0950-091X. 33(1), s. 91–117. doi: 10.1111/bre.12456. Fulltekst i vitenarkiv Vis sammendrag

  An extensive, reprocessed two-dimensional (2D) seismic data set was utilized together with available well data to study the Tiddlybanken Basin in the southeastern Norwegian Barents Sea, which is revealed to be an excellent example of base salt rift structures, evaporite accumulations and evolution of salt structures. Late Devonian–early Carboniferous NE-SW regional extensional stress affected the study area and gave rise to three halfgrabens that are separated by a NW-SE to NNW-SSE trending horst and an affiliated interference transfer zone. The arcuate nature of the horst is believed to be the effect of pre-existing Timanian basement grain, whereas the interference zone formed due to the combined effect of a Timanian (basement) lineament and the geometrical arrangement of the opposing master faults. The interference transfer zone acted as a physical barrier, controlling the facies distribution and sedimentary thickness of three-layered evaporitic sequences (LES). During the late Triassic, the northwestern part of a salt wall was developed due to passive diapirism and its evolution was influenced by halite lithology between the three-LES. The central and southeastern parts of the salt wall did not progress beyond the pedestal stage due to lack of halite in the deepest evaporitic sequence. During the Triassic–Jurassic transition, far-field stresses from the Novaya Zemlya foldand- thrust belt reactivated the pre-salt Carboniferous rift structures. The reactivation led to the development of the Signalhorn Dome, rejuvenated the northwestern part of the salt wall and affected the sedimentation rates in the southeastern broad basin. The salt wall together with the Signalhorn Dome and the Carboniferous pre-salt structures were again reactivated during post-Early Cretaceous, in response to regional compressional stresses. During this main tectonic inversion phase, the northwestern and southeastern parts of the salt wall were rejuvenated; however, salt reactivation was minimized towards the interference transfer zone beneath the centre of the salt wall.

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2019). Carboniferous graben structures, evaporite accumulations and tectonic inversion in the southeastern Norwegian Barents Sea. Marine and Petroleum Geology. ISSN 0264-8172. 112. doi: 10.1016/j.marpetgeo.2019.104038. Fulltekst i vitenarkiv Vis sammendrag

  High quality reprocessed seismic reflection profiles and available wells were used to study the little studied southeastern Norwegian Barents Sea and east Finnmark Platform. The study area comprises prominent structural elements such as the Haapet, Veslekari, and Signalhorn domes, the West Fedynsky High, and the Tiddlybanken and Nordkapp basins. Seven deep-seated Carboniferous grabens, not formally described earlier, were defined and informally named; and similarly, five evaporite bodies that are tapered stratigraphically above the grabens have been mapped in detail. In the late Devonian, the region comprised a central structural high (Fedynsky High), and two depressions to the north and south, and has subsequently experienced transtensional deformation during a late Devonian-early Carboniferous NE-SW regional extensional phase. As a result, a NW-SE trending graben system was created over the paleotopography, following the inherited Timanian orogeny lineaments and giving rise to the deep-seated Carboniferous grabens. Pennsylvanian to early Permian evaporites were deposited and were characterized by mobile and non-mobile lithologies. The Carboniferous structures controlled the volume, thickness and lithological alterations of the evaporites, and have later influenced the distribution and development of the salt wall and domes. The Haapet, Veslekari, composite West Fedynsky (two domes informally named Alpha and Beta) and Signalhorn domes were generated and the salt wall of the Tiddlybanken Basin was rejuvenated during the late Triassic due to compressional stresses propagating from the evolving Novaya Zemlya fold-and-thrust belt. The domes and salt wall were subsequently reactivated during the upper Jurassic and earliest Cretaceous. Furthermore, we infer that the main phase of reactivation of these structures took place during the early-middle Eocene due to far-field stresses from the transpressional Eurekan/Spitsbergen orogeny.

• Gabrielsen, Roy Helge; Olesen, Odleiv; Braathen, Alvar; Faleide, Jan Inge; Baranwal, Vikas Chand & Lindholm, Conrad (2019). The Listafjorden-Drangedal fault complex of the Agder-Telemark lineament zone, southern Norway. A structural analysis based on remote sensing and potential field data. GFF. ISSN 1103-5897. 141(3), s. 200–215. doi: 10.1080/11035897.2019.1624978. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Zalmstra, Heleen; Sokoutis, Dimitrios; Willingshofer, Ernst; Faleide, Jan Inge & Braut, Hanna Lima (2019). The influence of mechanically weak layers in controlling fault kinematics and graben configurations: Examples from analog experiments and the Norwegian continental margin. American Association of Petroleum Geologists Bulletin. ISSN 0149-1423. 103(5), s. 1097–1110. doi: 10.1306/10261817077. Fulltekst i vitenarkiv Vis sammendrag

  Fault systems in extensional basins commonly display geometries that vary with depth, reflecting depth- and lithology-dependent mechanical strength. Using an experimental approach, we investigate this relationship by deploying physical analog models with stratified sequences consisting of brittle–ductile (sand–silicone polymer) sequences subject to single and polyphase deformation. The experiments were used as analogs for a sandstone sequence interlayered by beds of evaporates or overpressured or unconsolidated mudstone in nature (the latter being representative of decollement horizons). Experiments (series 1 [S1]) using homogeneous and stratified quartz and feldspar sand produced asymmetric, composite single grabens with diverse fault frequencies and fault styles for the graben margin faults. For the mechanically stratified experiments with one decollement level (series 2), contrasting graben configurations were produced, in that the lowermost sequence was characterized by graben geometries of similar type to that of the S1 experiments, whereas the sequence above the decollement was characterized by large fault blocks, delineated by steepened or oversteepened faults. The experiments with two decollements (series 3) were displayed similarly but included graben geometries that widened upward, with each level being characterized by independent fault systems. The results can be used to explain strata-bound fault patterns and depth-dependent extension as seen in several places along the Norwegian continental margin and elsewhere.

• Kornprobst, Jacques; Abalos, Benito; Barbey, Pierre; Boullier, Anne-Marie; Burg, Jean-Pierre & Capdevila, Ramon [Vis alle 15 forfattere av denne artikkelen] (2018). Boris Choubert: Unrecognized visionary geologist, pioneer of the global tectonics. Bulletin de la Société Géologique de France. ISSN 0037-9409. 189(2). doi: 10.1051/bsgf/2018006. Fulltekst i vitenarkiv Vis sammendrag

  This work is a review of Boris Choubert’s paper (1935), which was published in French under the rather devalorizing title: “Research on the Genesis of Palaeozoic and Precambrian Belts.” Despite its innovative content, this article had no impact either at the time of its publication or even later. It begins with the construction of a remarkable fit of the circum-Atlantic continents. This was based on the −1.000 meters isobath instead of the shoreline. Thirty years before Bullard et al. (1965), it demonstrated in an indisputable way the reality of the continents motion on the surface of the Earth. Therefore, Choubert designated Wegener’s “continental drift” as the main cause of tectonics. Even going beyond Wegener’s theory, he argued that this mechanism was efficient well before the formation of the Triassic Pangæa, during the whole Palaeozoic to result in the building of the Caledonian and Hercynian mountains. Although he was still encumbered by the vocabulary of the time regarding geosynclines, Boris Choubert described tectonics based on the horizontal mobility of the Precambrian continental blocks. Oddly enough, he did not apply this model to the Precambrian structures, which he attributed to the effects of the Earth’s rotation on the continental crust during its solidification. At the time of its publication, this paper was a very important step towards understanding global tectonics. Unfortunately, Choubert’s contemporaries did not generally recognize its significance.

• Lundmark, Anders Mattias; Gabrielsen, Roy Helge; Strand, Tor & Ohm, Sverre Ekrene (2018). Repeated post-Caledonian intra-cratonic rifting in the central North Sea: Evidence from the volcanic record in the Embla oil field. Marine and Petroleum Geology. ISSN 0264-8172. 92, s. 505–518. doi: 10.1016/j.marpetgeo.2017.11.018. Fulltekst i vitenarkiv Vis sammendrag

  Intrusive and extrusive mafic igneous rocks in the Embla oil field, central North Sea, testify to repeated post-Caledonian magmatism on the northern flank of the Mid North Sea High. The igneous rocks are highly clay- and carbonate-altered, but retain their High Field Strength element signatures on the sample scale. These signatures are used to group, classify and investigate the tectonic significance of the rocks. Three magmatic events are identified. Late Devonian transitional basalts are interpreted as part of a bimodal volcanic assemblage that includes ca. 375 Ma alkali rhyolites, suggested to record rifting in a proto-Central Graben. Early Permian volcanic and hypabyssal alkaline rocks in the Embla oil field display lamprophyric traits and represent low degree melts. They likely correlate either to ca. 300 Ma lamprophyre magmatism leading up to, or 298-292 Ma alkaline magmatism in the Midland Valley - Southern Uplands coeval with the northwest European magmatic flare-up at the Permo-Carboniferous boundary. Kimmeridgian-Tithonian submarine tholeiitic basalts in the Embla oil field post-date the alkaline continental mid Jurassic magmatism associated with doming and initial rifting in the North Sea, and are suggested to represent a hitherto unknown volcanic expression of the late Jurassic main rift phase in the Central Graben.

• Indrevær, Kjetil; Gac, Sebastien; Gabrielsen, Roy Helge & Faleide, Jan Inge (2018). Crustal-scale subsidence and uplift caused by metamorphic phase changes in the lower crust: A model for the evolution of the Loppa High area, SW Barents Sea from late Paleozoic to Present. Journal of the Geological Society. ISSN 0016-7649. 175(3), s. 497–508. doi: 10.1144/jgs2017-063. Fulltekst i vitenarkiv Vis sammendrag

  The Loppa High area has been subject to several events of uplift and subsidence from the Late Paleozoic to Present. The driving mechanisms behind the vertical movements, however, are not fully understood. We propose that uplift and subsidence were influenced by the combination of density changes caused by metamorphic phase changes in a 90 × 140 km wide mafic lower crustal body below the Loppa High and local (rift-related) and far-field stress. Through a numerical modelling approach we analyse the tectonically induced variations in pressure and temperature in the lower crust, their influence on phase changes in the mafic body and the affiliated vertical movements. Results show that (1) densification of the mafic body caused by far-field compression associated with the late Triassic westward translation of Novaya Zemlya could cause surface subsidence, (2) heat and fluid influx provided by early Cretaceous rifting could trigger density reduction and surface uplift and (3) the present-day geometry of the Loppa High as observed in seismic data can be reproduced by combining the modelled effect of rift flank uplift and phase changes in the mafic body. Phase change-driven vertical movements may also have affected other structural highs in the western Barents Sea, including the Stappen High. The final version of this reseach has been published in the Journal of the Geological Society. © 2017 Geological Society

• Skar, Tore; Berg, Silje Støren; Gabrielsen, Roy Helge & Braathen, Alvar (2017). Fracture networks of normal faults in fine-grained sedimentary rocks: examples from Kilve Beach,SW England. Geological Society Special Publication. ISSN 0305-8719. 439, s. 289–306. doi: 10.1144/SP439.10. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Braathen, Alvar; Kjemperud, Magnus Vestheim & Valdresbåten, Marie Lovise (2017). The geometry and dimensions of fault core lenses. Geological Society Special Publication. ISSN 0305-8719. 439, s. 249–269. doi: 10.1144/SP439.4. Fulltekst i vitenarkiv
• Indrevær, Kjetil; Gabrielsen, Roy Helge & Faleide, Jan Inge (2017). Early Cretaceous synrift uplift and tectonic inversion in the Loppa High area, southwestern Barents Sea, Norwegian shelf. Journal of the Geological Society. ISSN 0016-7649. 174(2), s. 242–254. doi: 10.1144/jgs2016-066. Fulltekst i vitenarkiv Vis sammendrag

  Tectonic inversion of rift basins is most commonly reported in the literature to occur after rifting has ceased. In contrast, we present evidence for synrift, localized tectonic inversion from the Loppa High area, southwestern Barents Sea and present a model for the formation of inversion structures as a result of differential uplift. The structures are of early Barremian to mid-Albian age (c. 131 – 105 Ma) and are focused in or near pre-existing extensional boundary faults along the margins of the Loppa High. Inversion is interpreted to be the result of uplift of the high along its inclined boundary faults, leading to space accommodation problems as uplift was not properly compensated by extension in the region. The model constrains the initiation of uplift of the Loppa High to the early Barremian and shows that the asymmetric margin configuration of the high may have led to a bulk clockwise rotation of the high around a vertical axis during uplift. The cause of uplift is not fully understood, but is suggested to be linked to contemporaneous extreme lithospheric thinning in neighbouring basins to the west. Processes involved may include isostatic flexure, thermal heating, lithological phase changes and/or far-field stresses, although these aspects need to be further tested. The final version of this reseach has been published in the Journal of the Geological Society. © 2016 Geological Society

• Gabrielsen, Roy Helge; Nystuen, Johan Petter & Olesen, Odleiv (2017). Fault distribution in the Precambrian basement of South Norway, Journal of Structural Geology. Journal of Structural Geology. ISSN 0191-8141. 108, s. 269–289. doi: 10.1016/j.jsg.2017.06.006. Fulltekst i vitenarkiv
• Torabi, Anita; Alaei, Behzad; Kolyukhin, Dmitriy; Libak, Audun; Gabrielsen, Roy Helge & Braathen, Alvar (2016). Fault geometric and seismic attributes; An integrated study with focus on the Barents Sea. First Break. ISSN 0263-5046. 34(5), s. 51–58. Fulltekst i vitenarkiv
• Torabi, Anita; Alaei, Behzad; Kolyukhin, Dmitriy; Libak, Audun; Gabrielsen, Roy Helge & Braathen, Alvar (2016). Fault geometry and seismic attributes; an integrated study with focus on the Barents Sea. First Break. ISSN 0263-5046. 34(5), s. 51–58. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Sokoutis, Dimitrios; Willingshofer, Ernst & Faleide, Jan Inge (2016). Fault linkage across weak layers during extension: an experimental approach with reference to the Hoop Fault Complex of the SW Barents Sea. Petroleum Geoscience. ISSN 1354-0793. 22(2), s. 123–135. doi: 10.1144/petgeo2015-029. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge (2016). Natural Hazards: what are they, can the be Predicted, and can they be Prevented? I Gabrielsen, Roy Helge (Red.), Natural disasters and societal safety. Det Norske Videnskaps-Akademi. ISSN 9788277190839. s. 9–12. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Braathen, Alvar; Kjemperud, Magnus Vestheim & Valdresbåten, Marie Lovise (2016). The geometry and dimensions of fault-core lenses. Geological Society Special Publication. ISSN 0305-8719. 439. doi: 10.1144/SP439.4. Fulltekst i vitenarkiv
• Gabrielsen, Roy; Nystuen, Johan Petter; Jarsve, Erlend Morisbak & Lundmark, Anders Mattias (2015). The Sub-Cambrian Peneplain in southern Norway: Its geological significance and its implications for post-Caledonian faulting, uplift and denudation. Journal of the Geological Society. ISSN 0016-7649. 172(6), s. 777–791. doi: 10.1144/jgs2014-154. Fulltekst i vitenarkiv
• Lundmark, Anders Mattias; Bue, Edina Pozer; Gabrielsen, Roy H.; Flaat, Kjersti; Strand, Tor & Ohm, Sverre Ekrene (2015). Provenance of late Palaeozoic terrestrial sediments on the northern flank of the Mid North Sea High: detrital zircon geochronology and rutile geochemical constraints. Geological Society Special Publication. ISSN 0305-8719. 386(1), s. 243–259. doi: 10.1144/SP386.4. Fulltekst i vitenarkiv
• Torabi, Anita; Gabrielsen, Roy; Fossen, Haakon; Ringrose, Philip; Skurtveit, Elin & Ando, Edward [Vis alle 15 forfattere av denne artikkelen] (2015). Strain localization in sandstone and its implications for CO2 storage. First Break. ISSN 0263-5046. 33(7), s. 81–92. Fulltekst i vitenarkiv Vis sammendrag

  Geological storage of CO2 is a key technical solution to the climate-energy challenge, but it has a number of technological constraints (Baines and Worden 2004; Halland et al., 2011), broadly under the themes of assuring adequate storage capacity and long-term storage integrity. A suitable CO2-storage reservoir should consist of rock formations with sufficient porosity, permeability and connectivity in order to provide an adequate storage volume. The role of faults and their associated deformation structures (such as deformation bands and fractures) in controlling both storage capacity and long-term storage integrity is thus a key factor in achieving globally significant CO2 storage (Figure 1). Although some sedimentary basins on the Norwegian continental shelf already harbour operational CO2- injection and storage projects such as Sleipner (Zweigel et al., 2004) and Snøhvit (Hansen et al., 2013), our understanding of reservoir fluid communication due to compartmentalization is far from complete and will be important for further use of the offshore basins for CO2 storage. In addition to the inherited structural features, elevated injection pressures may cause hydraulic fractures or stimulate fault reactivation which both point to the need to characterize the geomechanical response of the rock system to CO2 injection (Rutqvist, 2012; Iding and Ringrose, 2010). In the present work, we investigate the effects of faults and their related structures on the geomechanical and petrophysical properties of sandstone reservoirs. Important components of fault systems include fractures and deformation bands in the damage zone and fault core (Caine et al., 1996; Shipton and Cowie, 2003; Fossen et al., 2007). Fault systems may enhance or suppress fluid communication, which in turn may affect the storage capacity and conductivity of the candidate reservoirs (Figure 1). As a case study, a reservoir model of the Tubåen Formation at the Snøhvit CO2 injection site in the Barents Sea (Grude et al., 2013; Hansen et al., 2013) was investigated using 4D seismic data and fault attribute analysis. The characteristics of deformation structures (e.g. sub-seismic faults, deformation bands and fractures) were investigated by field studies of outcrop analogues and by triaxial laboratory experiments to provide a basis for numerical modelling. Fault architecture within reactivated fault systems was studied by the use of analogue modelling. Key questions addressed in the work include: a) Where and when might strain localize in the reservoir? b) How does rock strain influence fluid communication? c) How might structural architecture affect CO2 storage effectiveness?

• Skurtveit, Elin; Grande, Lars; Ogebule, Oluwakemi Yetunde; Gabrielsen, Roy; Faleide, Jan Inge & Mondol, Nazmul Haque [Vis alle 8 forfattere av denne artikkelen] (2015). Mechanical testing and sealing capacity of the Upper Jurassic Draupne Formation, North Sea. I Smeallie, Peter (Red.), 49th US Rock Mechanics/Geomechanics Symposium - ARMA. American Rock Mechanics Association (ARMA). ISSN 9780979497506. Fulltekst i vitenarkiv
• Gabrielsen, Roy; Fossen, Haakon; Faleide, Jan Inge & Hurich, Charles A. (2015). Mega-scale Moho relief and the structure of the lithosphere on the eastern flank of the Viking Graben, offshore southwestern Norway. Tectonics. ISSN 0278-7407. 34(5), s. 803–819. doi: 10.1002/2014TC003778. Fulltekst i vitenarkiv
• Jarsve, Erlend Morisbak; Eidvin, Tor; Nystuen, Johan Petter; Faleide, Jan Inge; Gabrielsen, Roy & Thyberg, Brit Inger (2015). The oligocene succession in the Eastern North Sea: Basin development and depositional systems. Geological Magazine. ISSN 0016-7568. 152(4), s. 668–693. doi: 10.1017/S0016756814000570. Fulltekst i vitenarkiv
• Jarsve, Erlend Morisbak; Krøgli, Svein Olav; Etzelmuller, Bernd & Gabrielsen, Roy (2014). Automatic identification of topographic surfaces related to the sub-Cambrian peneplain (SCP) in southern Norway - Surface generation algorithms and implications. Geomorphology. ISSN 0169-555X. 211, s. 89–99. doi: 10.1016/j.geomorph.2013.12.032. Fulltekst i vitenarkiv
• Jarsve, Erlend Morisbak; Maast, Tom Erik; Gabrielsen, Roy; Faleide, Jan Inge; Nystuen, Johan Petter & Sassier, Caroline (2014). Seismic stratigraphic subdivision of the Triassic succession in the Central North Sea; integrating seismic reflection and well data. Journal of the Geological Society. ISSN 0016-7649. 171(3), s. 353–374. doi: 10.1144/jgs2013-056. Fulltekst i vitenarkiv
• Fossen, Haakon; Gabrielsen, Roy; Faleide, Jan Inge & Hurich, Charles A. (2014). Crustal stretching in the Scandinavian Caledonides as revealed by deep seismic data. Geology. ISSN 0091-7613. 42(9), s. 791–794. doi: 10.1130/G35842.1. Fulltekst i vitenarkiv
• Jarsve, Erlend Morisbak; Faleide, Jan Inge; Gabrielsen, Roy & Nystuen, Johan Petter (2014). Mesozoic and Cenozoic basin configurations in the North Sea. I Martinius, Allard W.; Ravnås, Rodmar; Howell, John A.; Steel, Ronald J. & Wonham, J. P. (Red.), From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin. Wiley-Blackwell. ISSN 9781118920466. s. 417–452. doi: 10.1002/9781118920435.ch15. Fulltekst i vitenarkiv
• Gabrielsen, Roy & Braathen, Alvar (2014). Models of fracture lineaments - Joint swarms, fracture corridors and faults in crystalline rocks, and their genetic relations. Tectonophysics. ISSN 0040-1951. 628, s. 26–44. doi: 10.1016/j.tecto.2014.04.022. Fulltekst i vitenarkiv
• Bastesen, Eivind; Rotevatn, Atle; Braathen, Alvar; Gabrielsen, Roy; Dypvik, Henning & Kalleson, Elin (2014). Polyphasal brecciation history revealing the nature and depth of Caledonian contractional deformation in the outboard terranes of West Central Norway. Norsk Geologisk Tidsskrift. ISSN 0029-196X. 93, s. 215–228. Fulltekst i vitenarkiv
• Midtkandal, Ivar; Brun, Jean-Pierre; Gabrielsen, Roy H. & Huismans, Ritske (2013). Control of lithosphere rheology on subduction polarity at initiation: Insights from 3D analogue modelling. Earth and Planetary Science Letters. ISSN 0012-821X. 361, s. 219–228. doi: 10.1016/j.epsl.2012.10.026. Fulltekst i vitenarkiv
• Skurtveit, Elin; Torabi, Anita; Gabrielsen, Roy H. & Zoback, Mark D. (2013). Experimental investigation of deformation mechanisms during shear-enhanced compaction in poorly lithified sandstone and sand. Journal of Geophysical Research (JGR): Solid Earth. ISSN 2169-9313. 118(8), s. 4083–4100. doi: 10.1002/jgrb.50342. Fulltekst i vitenarkiv Vis sammendrag

  Shear-enhanced compaction in shallow sandstone reservoirs has been investigated in laboratory experiments using high-pressure triaxial testing of poorly lithified sandstone and sand. We have studied the deformation mechanism involved during shear-enhanced compaction and controlling parameters for yield stress at varying confining pressures for sandstone/sand with different grain sizes, porosities, and packing. Experimental testing provides insights into the deformation mechanism during hydrostatic and axial compression of coarse- and fine-grained sands with different packing including (1) natural coarse-grained sandstone, (2) densely packed fine-grained sand, and (3) loosely packed fine-grained sand. Monitoring of deformation and ultrasonic velocity during deformation indicates porosity loss, compaction, and strain hardening for most of the samples. Visualization of deformation using pretest and posttest X-ray imaging and thin sections demonstrates localized deformation fabrics and grain damage. The results show grain rearrangement as the controlling deformation mechanism for material at low stress and high porosity, whereas for lower porosity and higher stress, grain fracturing controlled the deformation. The most pronounced localization of deformation was observed for the coarse-grained, low-porosity material. A Cam-Clay cap model was used to describe the porosity loss during compaction and shear-enhanced compaction, demonstrating large inelastic compaction with increasing confining pressure. Yield stress and end caps for poorly lithified sandstone are observed for various porosities and stress conditions and found to be lower than predicted using empirical relationships for sandstone.

• Blinova, Maria Konstantinovna; Faleide, Jan Inge; Gabrielsen, Roy H. & Mjelde, Rolf (2013). Analysis of structural trends of sub-seafloor strata in the Isfjorden area of the West Spitsbergen Fold-and-Thrust Belt based on multichannel seismic data. Journal of the Geological Society. ISSN 0016-7649. 170(4), s. 657–668. doi: 10.1144/jgs2012-109. Fulltekst i vitenarkiv

Se alle arbeider i NVA

• Gabrielsen, Roy Helge & Lacasse, Suzanne (2016). Natural disasters and societal safety. Det Norske Videnskaps-Akademi. ISBN 9788277190839. 173 s. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge (2015). The Structure and Hydrocarbon Traps in Sedimentary Basins. Springer Publishing Company. ISBN 9783642341311. 41 s. Fulltekst i vitenarkiv

Se alle arbeider i NVA

• Gabrielsen, Roy Helge (2023). Geologien i Skurdalskyrkja. Skurdølen. 26(1), s. 38–46. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge & Rueslåtten, Håkon Gunnar (2023). En kort geologisk-topografisk turguide for Hardangervidda. Norsk Geologisk Forening Geological Guides. 9-2023, s. 1–24. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge (2023). Geologien i Skurdalskyrkja. Geonytt. ISSN 0802-6173. 28(2), s. 6–13. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Torgersen, E & Nystuen, R (2021). Geochronological evidence for repeated brittle reactivations of a pre-existing plastic shear zone: The Himdalen–Ørje deformation zone, Southern Norway. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Narum, Bjørn Magnus & Corfu, Fernando (2021). Remmen ved høgskolen i Østfold. Sjelden geologisk lokalitet som gir ny kunnskap om Sør-Norges grunnfjell for forskere og studenter. Stein. ISSN 0802-9121. 48(1), s. 4–10. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge & Alvilde, Naterstad (2021). Johan Naterstad (1934-2020) - en belest støvlesliter med hammer, mikroskop og geologisk teft. Geonytt. ISSN 0802-6173. 26(23), s. 22–25. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Pre-salt Carboniferous basin architecture, structural inheritance and segmentation in the Nordkapp Basin, Barents Sea. Fulltekst i vitenarkiv Vis sammendrag

  Reprocessed regional 2D seismic reflection profiles, 3D seismic data, available wells, and gravity and magnetic data were used to study the pre-salt rift architecture in the Nordkapp Basin, Barents Sea, and its impact on the evaporite accumulations and distribution of salt structures. The basin is subdivided into three main segments (the northeastern, central, and southwestern sub-basins) and has evolved over the complex interaction between the Timanian and Caledonian structural basement grains. Each segment is characterized by prominent magnetic anomalies related to the Timanian and Caledonian structural inheritance. The rotated magnetic lineations associated with the Caledonian structures beneath the Finnmark Platform pass through the central segment, where the Middle Allochthonous Front creates the major sub-division between the two structural grains. We suggest that the rheological properties, locations, orientations and interaction of the parts of the basement influenced by Timanian and Caledonian structural grains together with two subsequent extensional phases, have strongly influenced the shallower pre-salt rift architecture. During the late Devonian – early Carboniferous NE-SW -oriented extensional phase, the Nordkapp Basin consisted of a northern and a southern regional halfgraben separated by an elevated interbasin ridge. The hinged margins of the northern and southern regional half-grabens were restricted against the NW-SE-striking graben beneath the Veslekari Dome and Troms- Finnmark Fault Complex, respectively. The internal configuration of the regional half-grabens was affected by the NW-SE-striking master faults. During the late Carboniferous to early Permian, a second extension phase took place with a shift in stress orientation to NW -SE and influenced the two regional half-grabens. In particular, a transfer fault with the character of an interbasin transfer zone (the northern transfer zone) divided the northern regional half-graben by separating its hinged margin (incipient northeastern segment) from the deeper part (incipient central segment). At the same time, the elevated interbasin ridge acted as a southern transfer zone, separating the incipient central and southwestern segments of the Nordkapp Basin. The Thor Iversen, Polstjerna, Måsøy and Nysleppen basin border fault systems were formed during the second extensional phase and reshaped the internal configuration of the two regional half-grabens. The structural interaction between the spatially variable Timanian and Caledonian structural grains overprinted by two subsequent phases of NE-SW and NW-SE extension caused the development of seven sub-basins in the Nordkapp Basin. Internally within the sub-basins, the evolving structural elements including cross-cutting master faults and structural highs have influenced the deposition and facies of the layered evaporitic sequences and defined the location of subsequent salt structures. We suggest that the relative depth of each sub-basin, the arrangement of structural highs along with the evolving master faults and the depositional paleo-environment all controlled the thickness and facies of the syn-rift layered evaporitic sequences.

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Southeastern Norwegian Barents Sea, pre-salt and supra salt evolution of the Tiddlybanken Basin and Nordkapp Basin. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge; Tsikalas, Filippos & Grimstad, Silje (2021). Salt tectonics in the Nordkapp Basin, Barents Sea – Interplay between sediment progradation and differential loading, syn-rift layered evaporitic sequences and pre-salt rift architecture. Fulltekst i vitenarkiv Vis sammendrag

  The study utilised reprocessed regional 2D seismic reflection profiles, 3D seismic data, available wells and basin modelling to reveal the controlling factors for the supra-salt sedimentary evolution of the northeastern, central and southwestern segments of the Nordkapp Basin. The basin offers an excellent environment for the study of diverse supra-salt structural styles, including turtle structures, secondary squeezed and thrusted welds, collided mini-basins, bowl vs wedge geometries, salt wing and megaflap. The observed salt structures show different sizes, shapes, orientations and lateral extent that affect the late Permian to Cenozoic supra-salt sedimentation in the Nordkapp Basin. Some remnant topography existed in the Nordkapp Basin in the earliest Triassic related to the underlying late Devonian to early Carboniferous (NE-SW) and late Carboniferous to early Permian (NW-SE) extension structures that overprinted on the contrasting Timanian and Caledonian basement structural grains. A regional prograding system arrived from the east causing differential loading and triggering of salt movements, which in turn created significant local topography with mini-basins surrounding the growing salt structures. The resulting basin topography strongly influenced the Triassic progradational sediment routings and dictated both where the initial deposition could take place and the formation of distinct depositional fairways. The depositional fairways primarily formed by differential loading and density-driven subsidence caused by the progradational sedimentation, and have restricted the subsidence in the mini-basins outside the fairways. Once the mobile salt was depleted from the layered evaporitic sequences (LES) beneath the axial zone then the salt structure was sourced from the depocenter opposite to it. The salt was evacuated from the LES diachronically along the strike of the basin as the earliest passive diapirism occurred in the northeastern segment and then progressed to the central segment due to the direction of progradation of the approaching deltaic system. We suggest that the direction and the velocity of the prograding system arriving from the east filled the initial depositional fairways over the syn-rift LES and the pre-salt rift architecture thus defined the sedimentary depositional architecture within the Nordkapp Basin. The salt structures were slightly rejuvenated due to the reactivation of the Carboniferous structures caused by the far-field stresses propagating during late Triassic in response to the evolving Novaya Zemlya fold-and-thrust belt farther to the east. The salt was depleted from the LES by the early Cretaceous as the prograding shelf platform complex buried the salt structures. The main phase of rejuvenation of the salt structures took place during the early-middle Eocene as a result of the transpressional Eurekan/Spitsbergen orogeny farther to the northwest until the Cenozoic uplift eroded most of the post-middle Cretaceous sediments.

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Southeastern Norwegian Barents Sea, Tiddlybanken Basin and Nordkapp Basin evolution. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Evaporite-influenced rift basins and salt tectonics in the southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Pre-salt and post-salt evolution of the Nordkapp Basin: valuable insights of APA acreage. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Pre-Salt and Supra-Salt Evolution of the Nordkapp Basin, Barents Sea. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Pre-Salt Carboniferous Basin Configuration and Supra-Salt Evolution of the Nordkapp Basin, Barents Sea: Interplay between Pre-Salt Rift Architecture and Syn-Rift Layered Evaporitic Sequences, Sediment Progradation and Differential Loading. Fulltekst i vitenarkiv Vis sammendrag

  Reprocessed regional 2D seismic reflection profiles, 3D seismic data, available wells, and gravity and magnetic data, together with basin modelling are utilised to comprehend the pre-salt Carboniferous rift architecture and supra-salt evolution of the Nordkapp Basin (study area: ~150000 sqkm). The Nordkapp Basin evolved over a basement that had been affected by complex interaction between the Timanian and Caledonian structural elements. During the late Devonian-early Carboniferous NE-SW-oriented extension, the Nordkapp Basin consisted of a northern and a southern regional half-graben separated by an elevated interbasin ridge. During the late Carboniferous-early Permian, a second extension phase took place with a shift in stress orientation to NW-SE that influenced the two regional half-grabens and caused the development of seven sub-basins separated by interbasin transfer zones in the Nordkapp Basin. The relative depth of each sub-basin, the arrangement of structural highs along with evolving master faults and depositional paleo-environment all controlled the thickness and facies of syn-rift layered evaporitic sequences (LES). Some remnant topography existed in the Nordkapp Basin in the earliest Triassic, when a regional prograding system arrived from the east causing differential loading and triggering the salt movements, which in turn created significant local topography with mini-basins surrounding the growing salt structures. The resulting composite basin topography strongly influenced the Triassic progradational sediment routings and dictated both where the initial deposition could take place and the formation of distinct depositional fairways. Basin modelling and structural restoration have revealed that once the mobile salt depleted from the syn-rift LES beneath the axial zone then the salt structure was sourced from depocenter opposite to it. The salt structures were slightly rejuvenated due to the reactivation of the Carboniferous structures caused by the far-field stresses propagating during late Triassic in response to the evolving Novaya Zemlya fold-and-thrust belt farther to the east. The salt was depleted from the synrift LES by the early Cretaceous as the prograding shelf platform complex buried the salt structures. The main phase of rejuvenation of the salt structures took place during the early-middle Eocene as a result of the transpressional Eurekan/Spitsbergen orogeny farther to the northwest until the Cenozoic uplift eroded most of the post-middle Cretaceous sediments. The spatially diverse salt structures affected the late Permian to Cenozoic supra-salt sedimentary strata in the Nordkapp Basin which offers an excellent environment to study the distinct supra-salt structural styles, including turtle structures, secondary and thrusted welds, bowl vs wedge geometries, collided and secondary mini-basins, salt wings and megaflaps.

• Gabrielsen, Roy Helge (2021). Med hammer og mikroskop: Geologen Johan Naterstad (1934 - 2020). Under Hallingsskarvet. Årbok for Hol Historielag. ISSN 1890-0011. s. 99–110. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2020). Anatomy of the evaporite accumulation and salt wall evolution in Tiddlybanken Basin, southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2020). Control of Carboniferous basinal evolution on evaporite accumulations and salt structures dynamics in the southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2020). Pre-salt Carboniferous basin architecture, salt tectonics and basin modelling in the Nordkapp Basin and adjacent parts of the SE Norwegian Barents Sea. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2020). Pre-salt Carboniferous basin architecture, salt tectonics and basin modelling in the Nordkapp Basin, SW Barents Sea. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2019). Carboniferous Graben Structures, Evaporite Accumulations and Inversion in the Southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv Vis sammendrag

  2D regional seismic reflection profiles and well data are used for the investigation of the deep basin architecture in the southeastern Norwegian Barents Sea. The study area contains thick upper Paleozoic to Mesozoic sedimentary strata with prominent structural features comprising the Haapet, Veslekari, and Signalhorn Domes; the Tiddlybanken Basin, Fedynsky High, and eastern Finnmark Platform. Interpretation of selected seismic profiles and time structure maps are presented focusing on the positions, extent, and configurations of the Carboniferous basins. Furthermore, we investigate the relation between the Carboniferous graben structures, evaporites accumulations and inversion in the area. The basin boundary faults of the Carboniferous structures strike NW-SE, and the syn-rift Carboniferous sequences were deposited in half and full grabens. Basins are separated by platforms and structural highs, while basin infill generally dips towards the axis of the grabens, except for the half-graben on the Finnmark Platform where strata dip towards the north and the half-grabens beneath the Haapet Dome where strata dip to the south. In the study area, evaporites are accommodated in the Carboniferous basins and carbonates occupy the structural highs. The deposition of evaporites was constrained by the master faults of the grabens, except for an evaporitic body, which oversteps the rift margins and connects with the southeastern and central parts of the Nordkapp Basin. Furthermore, a thick Triassic succession, with provenance mainly in the southeast, was deposited in the region, while thin Jurassic sediments outcrop at seafloor over the Veslekari Dome and the salt diapir of the Tiddlybanken Basin. Prograding Cretaceous strata mark another phase of regional subsidence in the study area. Several domes are identified in the near base Triassic to the base Cretaceous levels with different shapes, orientation and sizes. The distribution and evolution of the younger domes are partially controlled by the deep-seated Carboniferous structures. Distinct observations including the lateral thickness variations for the uppermost Triassic to the lowermost Cretaceous sediments, the rim syncline development and the onlap at various stratigraphic levels all suggest several phases of doming. We propose a Paleogene timing for the main phase of reactivation of the inverted domes due to Carboniferous graben structures, probably in response to regional compressional stresses.

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2019). Control of Carboniferous Graben Structures on Evaporite Accumulation and Domes Location in Southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv
• Wong, Po Wan; Faleide, Jan Inge & Gabrielsen, Roy Helge (2019). Late Mesozoic evolution of the Southwest Barents Sea and its tectonic implications. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2019). Anatomy of the evaporite accumulation and salt wall evolution in Tiddlybanken Basin, southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2019). Carboniferous graben structures, evaporite accumulations and tectonic inversion in southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv Vis sammendrag

  Improved resolution reprocessed 2D multi-channel seismic reflection profiles, combined with exploration wells and stratigraphic boreholes penetrating upper Paleozoic sequences on the eastern Finnmark Platform were utilized particularly to analyse the Carboniferous graben system, evaporite bodies distribution, domes and salt wall in the southeastern Norwegian Barents Sea and east Finnmark Platform. Seven deep-seated Carboniferous grabens, not previously described and named, were defined and informally named as grabens G1-G7. Five evaporite bodies, named EB1-EB5, have been mapped in detail. During late Devonian, the study area was dominated by a central structural high region (Fedynsky High) rimmed by sag basins to the north and south it. We suggest that late Devonian-early Carboniferous (Mississippian) NE-SW oriented stress regime as suggested for the evolution of the Pechora Basin, eastern Barents Sea, and Olga-Sørkapp region also created the NW-SE striking graben structures (G1-G5) in the southeastern Norwegian Barents Sea, mainly exploiting the Timanian Orogen structural grain. In the early Pennsylvanian, the NE-SW trending Nordkapp Basin dissected the already existing G6 and G7 grabens. Pennsylvanian to early Permian evaporite units were deposited. The temporal relationship suggests that the evaporites were deposited as post-rift sequences within the Carboniferous grabens of the southeastern Norwegian Barents Sea and as syn-rift or early post-rift sequences within the Nordkapp Basin. The discrepancy in syn-rift to post-rift basin conditions affected the distribution and thickness of the accumulated evaporites, partly or fully occupying the available accommodation space. Evaporite bodies EB1, EB3, and EB5 are correlated to the Gipsdalen Group halite and non-halite lithologies (i.e. anhydrite-related compositions) with less thickness, while evaporite body EB4 contained mobile halite lithology and EB2 comprised of transitional lithology from graben margin (non-mobile) to the center (mobile). The deep-seated structures constrained the accumulation and facies variations of the evaporites and strongly controlled the distribution and partially the evolution of the stratigraphically shallower domes. The effect of salt mobilization on the dome evolution depended on the relative amount of lithologies with mobile to immobile properties, and the relative stratigraphic thickness of each unit. The NW-SE trending salt wall evolution is complex, varies along-strike, and has affected the structural development of the Signalhorn Dome that was instigated during late Triassic due to the far-field stresses from the evolving Novaya Zemlya fold-and-thrust belt. The Haapet, Veslekari, Alpha and Beta domes were instigated and the salt wall was rejuvenated during late Triassic due to compressional stresses propagating from the Novaya Zemlya fold-and-thrust belt as these structures were located in the relative proximity. Several studies on the Barents Sea-Svalbard region have similarly recorded the results of far-field compressional stresses attributed to the Novaya Zemlya fold-and-thrust belt. All of the structural elements were mildly reactivated during upper Jurassic and earliest Cretaceous. However, the exact causes of this reactivation are difficult to be deciphered in detail due to lack of dense seismic reflection coverage and relatively poor seismic resolution in the southeastern Norwegian Barents Sea. Prograding shelf platform complex sediments during early Cretaceous buried the domes and the salt wall until reactivation of the deep-seated Carboniferous grabens led to the reactivation of these structures and to the erosion of the post-lower Cretaceous strata over their crest. We infer an early-middle Eocene timing for the main phase of reactivation of the domes and salt wall, probably in response to regional compressional stresses related to the transpressional Eurekan/Spitsbergen orogeny

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2019). Deep-seated Carboniferous graben structures and reactivation of younger domes in the southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv Vis sammendrag

  2D regional seismic reflection profiles and well data were used for the mapping of the deep Carboniferous basin architecture in the southeastern Norwegian Barents Sea. Interpretation of selected seismic profiles and time structure maps are presented focusing on the positions, configurations and deformation stages of these basins. Furthermore, we investigate the connection between the Carboniferous graben structures, evaporites accumulations and reactivation of the younger domes in the area. The basin boundary faults and affiliated depo-centers of the Carboniferous structures strike NW-SE, defining structural configurations consisting of half- and full grabens. The basins are separated by platforms and structural highs. The basin fill generally dips towards the axis of the grabens, except for the half-graben on the Finnmark Platform, where strata dip towards the north and the half-grabens beneath the Haapet Dome where strata dip to the south. Evaporites are accommodated in the Carboniferous basins and carbonates occupy the structural highs. The deposition of evaporites was constrained by the master faults of the grabens, except for one evaporite body, which oversteps the rift margins and connects with the southeastern and central parts of the Nordkapp Basin. Several domes are identified at the near base Triassic to the base Cretaceous levels. These have different shapes, orientation and sizes. The distribution and evolution of the younger domes are partially controlled by the deep-seated Carboniferous structures. Lateral thickness variations for the uppermost Triassic to the lowermost Cretaceous sediments, the rim syncline development and the onlap at various stratigraphic levels, all suggest several phases of doming. We propose a Paleogene timing for the main phase of reactivation of the domes due to Carboniferous graben structures, probably in response to regional compressional stresses.

• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2018). Correlation between the Carboniferous graben structures, salt accumulations and inversion in the southeastern Norwegian Barents Sea. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge (2018). Sum up and looks into the future. Fulltekst i vitenarkiv
• Indrevær, Kjetil; Gabrielsen, Roy Helge; Bugge, Aina Juell & Faleide, Jan Inge (2017). Latest Permian/earliest Triassic folds & thrusts on the Loppa High. Fulltekst i vitenarkiv
• Gac, Sebastien; Indrevær, Kjetil; Gabrielsen, Roy Helge & Faleide, Jan Inge (2017). A model of the tectonic evolution of the Loppa High from Late Paleozoic to present-day. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Faleide, Jan Inge; Wong, P.W; Gac, Sebastien; Indrevær, Kjetil & Miraj, M. Faisal [Vis alle 9 forfattere av denne artikkelen] (2017). Palaeogene North Atlantic opening along the Barents Sea margin and its adjacent deformation. Fulltekst i vitenarkiv
• Indrevær, Kjetil; Gabrielsen, Roy Helge; Gac, Sebastien & Faleide, Jan Inge (2017). Is there a tectonic signal in the development of the late Palaeozoic bioherms on the Loppa High? Fulltekst i vitenarkiv
• Indrevær, Kjetil; Gac, Sebastien; Gabrielsen, Roy Helge & Faleide, Jan Inge (2017). Can metamorphic phase changes in the lower crust help explain the repeated uplift and subsidence of the Loppa High area through time? Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Braathen, Alvar; Faleide, Jan Inge; Indrevær, Kjetil & Aamodt, L (2016). The Feda‐Lista‐Bredtflå fault system; a major lineament crossing the offshore‐onshore transition. Fulltekst i vitenarkiv
• Indrevær, Kjetil; Faleide, Jan Inge; Serck, Christopher Sæbø & Gabrielsen, Roy Helge (2016). Paleohighs of the western Barents Sea and their onshore correlation. Fulltekst i vitenarkiv
• Faleide, Jan Inge; Planke, Sverre; Abdelmalak, Mohamed Mansour; Zastrozhnov, Dmitrii; Wong, P.W. & Shephard, Grace [Vis alle 12 forfattere av denne artikkelen] (2016). Basin architecture and evolution at NE Atlantic conjugate margins. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge & Nystuen, Johan Petter (2016). Glacial striations from the Varangerian glaciation in South Norway. Fulltekst i vitenarkiv
• Gabrielsen, Roy Helge; Sokoutis, Dimitrios; Willingshofer, Ernst & Faleide, Jan Inge (2016). Experiments on horizontal and vertical fault linkage and its relevance for the Hoop Fault Complex. Fulltekst i vitenarkiv
• Gabrielsen, Roy & Braathen, Alvar (2015). Dynamics, Architecture and Influences on Fluid Flow in Normal Faults. Fulltekst i vitenarkiv
• Faleide, Jan Inge; Wong, Po Wan; Gabrielsen, Roy Helge; Tsikalas, Filippos; Blaich, Olav Antonio & Planke, Sverre [Vis alle 7 forfattere av denne artikkelen] (2015). Basin evolution at the SW Barents Sea margin and its conjugate off NE Greenland. Fulltekst i vitenarkiv
• Faleide, Jan Inge; Mahajan, Aatisha; Gabrielsen, Roy Helge; Breivik, Asbjørn Johan; Planke, Sverre & Myklebust, Reidun (2015). Basement and Late Paleozoic basin configurations in the western and central Barents Sea. Fulltekst i vitenarkiv
• Gabrielsen, Roy & Sokoutis, Dimitrios (2015). Fault initiation, fault growth and fault linkage; Musings from analogue experiments. Fulltekst i vitenarkiv
• Faleide, Jan Inge; Bjørlykke, Knut & Gabrielsen, Roy Helge (2015). Geology of the Norwegian Continental Shelf. I Bjørlykke, Knut (Red.), Petroleum Geoscience. From sedimentary environments to rock physics - second edition. Encyclopedia of Global Archaeology/Springer Verlag. ISSN 9783642341311. s. 603–636. Fulltekst i vitenarkiv
• Faleide, Jan Inge; Kalani, Mohsen; Sassier, Caroline; Angeli, Matthieu; Ogebule, Oluwakemi Yetunde & Baig, Irfan [Vis alle 15 forfattere av denne artikkelen] (2015). Caprock research in the CO2Seal project. Fulltekst i vitenarkiv
• Indrevær, Kjetil; Faleide, Jan Inge; Gabrielsen, Roy Helge; Mulrooney, Mark & Braathen, Alvar (2015). Inversion along the Troms-Finnmark Fault Complex, SW Barents Sea: Structural character and timing. Fulltekst i vitenarkiv
• Faleide, Jan Inge; Gabrielsen, Roy Helge; Indrevær, Kjetil; Gac, Sebastien; Minakov, Aleksander & Miraj, M.F. [Vis alle 7 forfattere av denne artikkelen] (2015). Contractional events in the Barents Sea basin evolution - timing, causes and implications. Fulltekst i vitenarkiv
• Sassier, Caroline; Jarsve, Erlend Morisbak; Heeremans, Michel; Abdelmalak, Mohamed Mansour; Faleide, Jan Inge & Gabrielsen, Roy (2014). Salt distribution in the Norwegian-Danish Basin, Central North Sea. Fulltekst i vitenarkiv
• Faleide, Jan Inge; Wong, P.W.; Gabrielsen, Roy; Tsikalas, Filippos; Blaich, Olav A. & Planke, Sverre [Vis alle 7 forfattere av denne artikkelen] (2014). Basin evolution at the SW Barents Sea margin and its conjugate off NE Greenland. Fulltekst i vitenarkiv
• Mahajan, Aatisha; Gabrielsen, Roy & Faleide, Jan Inge (2014). Structural analysis of 3D seismic for Hoop Fault Complex, SW Barents Sea. Fulltekst i vitenarkiv
• Miraj, M.A.F.; Pascal, C.; Gabrielsen, Roy & Faleide, Jan Inge (2014). Numerical modeling of main inverted structures in the western Barents Sea. Fulltekst i vitenarkiv
• Gabrielsen, Roy; Braathen, Alvar & Skar, Tore (2014). Normal Faults in Sedimentary Rocks; Dynamics, Architecture and Influences on Fluid Flow. Fulltekst i vitenarkiv
• Lundmark, Anders Mattias; Kristoffersen, Magnus; Thomsen, T; Gillhespy, Lewis & Gabrielsen, Roy H. (2014). Revealing hidden parts of the Caledonian orogen by provenance analysis of Mesozoic sandstones. Fulltekst i vitenarkiv
• Gabrielsen, Roy H.; Jarsve, Erlend Morisbak; Lundmark, Anders Mattias; Nystuen, Johan Petter & Faleide, Jan Inge (2014). The evolution of the passive continental margin of Norway and its adjacent mainland – using the sub-Cambrian peneplain as a reference surface. Fulltekst i vitenarkiv
• Theissen-Krah, Sonja; Schmid, Daniel Walter; Faleide, Jan Inge; Planke, Sverre; Gabrielsen, Roy H. & Myklebust, Reidun (2013). Structural and thermal reconstruction of a transect across the More Basin. Fulltekst i vitenarkiv
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2021). Evaporite-influenced rift basins and salt tectonics in the southeastern Norwegian Barents Sea. Universitetet i Oslo. Fulltekst i vitenarkiv Vis sammendrag

  The doctoral thesis is a collection of four published journal papers, which investigate the influence of the basement inheritance on the pre-salt basin configuration and its effects on the accumulation of the layered evaporite sequence, salt tectonics and post-salt sedimentation in evaporite-influenced rift basins. The thesis has shown that rheological properties, locations, orientation and interaction of inherited structures created zones of weakness that influenced the development of complex pre-salt basin architecture along with subsequent regional extensional phases. Consequently, the syn-rift to post-rift processes within discrete accommodation space of varying depth and depositional paleo-environment, have influenced the thickness and facies (mobile to non-mobile) of the layered evaporite sequence. The study highlights that the regional extension and prograding sediment influx direction, the sediment transport velocity and the sediment thickness influenced the dynamics of the early to late passive diapirism, the salt expulsion and the depletion, together with the layered evaporite thickness and facies that were affected by the pre-salt rift architecture. The salt structures and evaporite-cored domes were rejuvenated due to far-field contractional stresses and eventually uplift eroded the successions over their crests.

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