Jan Inge Faleide

• Bellwald, Benjamin; Planke, Sverre; Polteau, Stephane; Lebedeva-Ivanova, Nina; Faleide, Jan Inge; Zengaffinen-Morris, Sunniva Margrethe; Morse, Stephen & Castelltort, Sébastien (2021). Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea. Journal of Glaciology.  ISSN 0022-1430.  s 1- 17 . doi: 10.1017/jog.2020.115
• Breivik, Asbjørn Johan; Faleide, Jan Inge; Mjelde, Rolf; Flueh, Ernst & Murai, Yoshio (2020). Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin. Tectonophysics.  ISSN 0040-1951.  776 . doi: 10.1016/j.tecto.2020.228318 Vis sammendrag

  The Norwegian continental shelf has been through several rift phases since the Caledonian orogeny. Early Cretaceous rifting created the largest sedimentary basins, and Early Cenozoic continental breakup between East Greenland and Europe affected the continental shelf to various degrees. The Lofoten/Vesterålen shelf is located off Northern Norway, bordering the epicontinental Barents Sea to the northeast, and the deep-water Lofoten Basin to the west. An ocean bottom seismometer/hydrophone (OBS) survey was conducted over the shelf and margin areas in 2003 to constrain crustal structure and margin development. This study presents Profile 8-03, located between the islands of Lofoten/Vesterålen and the shelf edge. The wide-angle seismic data were modeled using forward/inverse raytracing to build a crustal velocity-depth transect. Gravity modeling was used to resolve an ambiguity in seismic Moho identification in the southwestern part. Results show a crustal thickness of ~31 km, significantly thicker than what a vintage land station based study suggested. Profile 8-03 and other OBS profiles to the southwest show high sedimentary velocities at or near the seafloor, increasing rapidly with depth. Sedimentary velocities were compared to the velocity-depth function derived from an OBS profile at the Barents Sea margin, tied to a coincident well log, where there is little erosion. Results from this profile and the crossing Profile 6-03 (Breivik et al. 2017) indicate three major erosion episodes; Late Triassic-Early Jurassic, tentatively mid-Cretaceous, Late Cretaceous–early Cenozoic, and a minor late glacial erosion episode off Vesterålen.

• Bugge, Aina Juell; Lie, Jan Erik; Evensen, Andreas Kjelsrud; Nilsen, Espen Harris; Kolbjørnsen, Odd & Faleide, Jan Inge (2020). Data-driven identification of stratigraphic units in 3D seismic data usin hierarchical density-based clustering. Geophysics.  ISSN 0016-8033.  85(5), s IM15- IM26 . doi: 10.1190/geo2019-0413.1
• Corseri, Romain; Gac, Sebastien; Faleide, Jan Inge & Planke, Sverre (2020). The tectonized central peak of the Mjølnir Impact Crater, Barents Sea. Journal of Structural Geology.  ISSN 0191-8141.  131 . doi: 10.1016/j.jsg.2019.103953 Fulltekst i vitenarkiv. Vis sammendrag

  The Mjølnir structure, SW Barents Sea, is one of the best-preserved marine impact craters on Earth. After impact on the paleo-seafloor about 142 Ma ago, this crater experienced an atypical deformation of its central peak, which is now elevated ~435 m above the crater rims. Here, we investigate the effect of far-field tectonic stresses on the central peak uplift based on interpretation of new high-resolution P-Cable and conventional seismic reflection data. Nearby wells provided stratigraphic control on the interpreted horizons. The reconstruction of the crater sedimentary infill supports a subdued original central peak relief with a 5 km-wide, gentle mound ~15 m below the rim. Our interpretation shows that subvertical, outward-dipping, impact-induced faults were reactivated by uplifted segments of the central peak up to 500 m above the platform level during one or several contractional episodes. We postulate that post-Albian tectonic compressional events triggered the structural uplift of the Mjølnir central peak. Differential compaction, previously seen as the main deformation process, may have increased the original central peak height by only ~10 m. The mobilization of impact-shattered rocks by tectonic compression provides a new and robust explanation for the structural rise of Mjølnir's central peak.

• Gac, Sebastien; Minakov, Alexander; Shephard, Grace; Faleide, Jan Inge & Planke, Sverre (2020). Deformation analysis in the Barents Sea in relation to paleogene transpression along the Greenland-Eurasia plate boundary. Tectonics.  ISSN 0278-7407.  39(10) . doi: 10.1029/2020TC006172 Fulltekst i vitenarkiv. Vis sammendrag

  Late Cretaceous‐Cenozoic contractional structures are widespread in the Barents Sea. While the exact dating of the deformation is unclear, it can only be inferred that the contraction is younger than the early Cretaceous. One likely contractional mechanism is related to Greenland Plate kinematics at Paleogene times. We use a thin sheet finite element modeling approach to compute deformation within the Barents Sea in response to the Greenland‐Eurasia relative motions during the Paleogene. The analytical solution for the 3‐D folding of sediments above basement faults is used to assess possibilities for folding. Two existing Greenland Plate kinematic models, differing slightly in the timing, magnitude, and direction of motion, are tested. Results show that the Greenland Plate's general northward motion promotes growing anticlines in the entire Barents Sea shelf. Our numerical models suggest that the fan‐shaped pattern of cylindrical anticlines in the Barents Sea can be associated with the Eurekan deformation concurrent to the initial rifting and early seafloor spreading in the northeast Atlantic. The main contraction phase in the SW Barents Sea coincides with the timing of continental breakup, whereas the peak of deformation predicted for the NW Barents Sea occurred at later times. Svalbard has experienced a prolonged period of compressional deformation. We conclude that Paleogene Greenland Plate kinematics are a likely candidate to explain contractional structures in the Barents Sea

• Hansen, Jørgen André; Mondol, Nazmul Haque; Tsikalas, Filippos & Faleide, Jan Inge (2020). Caprock characterization of Upper Jurassic organic-rich shales using acoustic properties, Norwegian Continental Shelf. Marine and Petroleum Geology.  ISSN 0264-8172.  121 . doi: 10.1016/j.marpetgeo.2020.104603 Fulltekst i vitenarkiv. Vis sammendrag

  Our analysis of a comprehensive well log database and complementary mineralogical and geochemical information indicates that the risk for Upper Jurassic shales on the Norwegian Continental Shelf (NCS) to permit severe leakage of hydrocarbons from the reservoir is generally low, even in the case of substantial uplift. The content of brittle minerals, organic content, and compaction are dominant factors that explain the observed discrepancies in acoustic properties of organic-rich caprock shales. In particular, variations in silt-clay content in clay-dominated shales are found to primarily influence sonic velocity and to correlate closely with gamma-ray where the uranium contribution is limited (“grey shales”). Changes in organic content exhibit a stronger density-component and are seen to counteract or mask the compaction effect on velocity and density in Kimmeridgian black shales. The Hekkingen, Draupne and Tau formations are distinctly different from the underlying grey shale formations in acoustic properties, despite that the latter group also contains significant amounts of organic matter. Based on the low permeability and high capillary sealing capacity of clay-dominated shales, we conclude that even for a silty seal, migration through the caprock matrix is highly unlikely. Furthermore, tectonic fracturing is an ineffective leakage mechanism when the seal is poorly consolidated/cemented prior to uplift. Brittleness, related to both mineralogical composition and consolidation, is consequently a crucial parameter for predicting seal integrity in exhumed basins. Our rock physics framework and interpretations relate this rather qualitative parameter to acoustic properties, and thus, to seismic data.

• 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 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.

• 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.
• Millett, John M.; Manton, Ben M.; Zastrozhnov, Dmitrii; Planke, Sverre; Maharjan, Dwarika; Bellwald, Benjamin; Gernigon, Laurent; Faleide, Jan Inge; Jolley, David W.; Walker, Faye; Abdelmalak, Mansour M.; Jerram, Dougal Alexander; Myklebust, Reidun; Kjølhamar, Bent E.; Halliday, Jennifer & Birch-Hawkins, Alex (2020). Basin structure and prospectivity of the NE Atlantic volcanic rifted margin: cross-border examples from the Faroe–Shetland, Møre and Southern Vøring basins. Geological Society Special Publication.  ISSN 0305-8719.  495 . doi: 10.1144/SP495-2019-12
• Mulrooney, Mark Joseph; Osmond, Johnathon L.; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2020). Structural analysis of the Smeaheia fault block, a potential CO2 storage site, northern Horda Platform, North Sea. Marine and Petroleum Geology.  ISSN 0264-8172.  121 . doi: 10.1016/j.marpetgeo.2020.104598 Fulltekst i vitenarkiv.
• Selway, Katherine; Smirnov, Maxim; Beka, Thomas; O'Donnell, John Paul; Minakov, Alexander; Senger, Kim; Faleide, Jan Inge & Kalscheuer, Thomas (2020). Magnetotelluric constraints on the temperature, composition, partial melt content, and viscosity of the upper mantle beneath Svalbard. Geochemistry Geophysics Geosystems.  ISSN 1525-2027.  21(5) . doi: 10.1029/2020GC008985
• Wiest, Johannes; Wrona, Thilo; Bauck, Marit Stokke; Fossen, Haakon; Gawthorpe, Rob; Osmundsen, Per Terje & Faleide, Jan Inge (2020). From Caledonian collapse to North Sea Rift: The extended history of a metamorphic core complex. Tectonics.  ISSN 0278-7407.  39:e2020TC006178(10) . doi: 10.1029/2020TC006178 Fulltekst i vitenarkiv.
• Zastrozhnov, Dmitry; Gernigon, Laurent; Gogin, Iakov; Planke, Sverre; Abdelmalak, Mohamed Mansour; Polteau, Stephane; Faleide, Jan Inge; Manton, Ben & Myklebust, Reidun (2020). Regional structure and polyphased Cretaceous-Paleocene rift and basin development of the mid-Norwegian volcanic passive margin. Marine and Petroleum Geology.  ISSN 0264-8172.  115 . doi: 10.1016/j.marpetgeo.2020.104269
• Baig, Irfan; Faleide, Jan Inge; Mondol, Nazmul Haque & Jahren, Jens (2019). Burial and exhumation history controls on shale compaction and thermal maturity along the Norwegian North Sea basin margin areas. Marine and Petroleum Geology.  ISSN 0264-8172.  104, s 61- 85 . doi: 10.1016/j.marpetgeo.2019.03.010 Fulltekst i vitenarkiv. Vis sammendrag

  The North Sea area has been subjected to significant erosion and subsequent deposition of sediments in the basin margin and deeper basin areas, respectively, during the late Neogene. A large amount of Cretaceous-early Quaternary sediments have been removed below the angular unconformity along the west and southwest coast of Norway and deposited in the huge North Sea Fan at the mouth of the Norwegian Channel. At the same time, a considerable thickness of early Quaternary-Paleocene sediments was also eroded towards the east in the central North Sea and subsequently deposited in the deeper basin areas to the west. This study seeks to estimate exhumation from compaction and thermal maturity based techniques by using sonic velocities of shales/carbonates and vitrinite reflectance data in a large number of boreholes in the central, eastern and northern North Sea. The results indicate no or minor exhumation in the Central Graben and flanking high areas, whereas more than ∼1 km sediments are eroded in the basin margin areas towards the Norwegian coast. More than ∼500 m sediments are eroded in the Egersund Basin and Stord Basin areas. A similarity of exhumation estimates from the Early Cretaceous-Early Miocene shales and Late Cretaceous-Early Paleocene carbonates indicates maximum burial sometime after the Early Miocene in most of the central and northern North Sea areas. However, the maximum burial throughout the North Sea Basin may be diachronous. Seismostratigraphic analysis indicates maximum burial sometime during the Oligocene in the Sorgenfrei-Tornquist Zone area in the eastern North Sea. Maximum burial in the Norwegian-Danish Basin varies from Miocene-Pliocene in eastern parts to early Pleistocene in western parts, whereas sediments are currently at their maximum burial in the Central Graben and southern Viking Graben areas. Restoration of surface elevations to their original position before the onset of erosion indicated large subaerially exposed areas in the Norwegian-Danish Basin and along the southwest coast of Norway. This is also supported by predominantly coastal and/or deltaic environments in the Norwegian-Danish Basin area during the late Neogene. These subaerially exposed areas may be linked to the regional tilting and erosion of the basin margin areas to the east and progressive basinward migration of deposition centres to the west since the Oligocene. The exhumation had significant effects on the petroleum system in the basin margin areas by cooling down the source rock. However, the deeper burial of sediments may also have changed the rheological properties of sediments from more ductile to brittle due to compaction and diagenetic processes which makes them more failure prone during exhumation leading to hydrocarbon leakage or seal failure in case of CO2 injection.

• Berndt, Christian; Planke, Sverre; Teagle, Damon; Huismans, Ritske; Torsvik, Trond Helge; Frieling, Joost; Jones, Morgan Thomas; Jerram, Dougal Alexander; Tegner, Christian; Faleide, Jan Inge; Coxall, Helen & Hong, Wei-Li (2019). Northeast Atlantic breakup volcanism and consequences for Paleogene climate change – MagellanPlus Workshop report. Scientific Drilling.  ISSN 1816-8957.  26, s 69- 85 . doi: 10.5194/sd-26-69-2019 Fulltekst i vitenarkiv. Vis sammendrag

  The northeast Atlantic encompasses archetypal examples of volcanic rifted margins. Twenty-five years after the last ODP (Ocean Drilling Program) leg on these volcanic margins, the reasons for excess melting are still disputed with at least three competing hypotheses being discussed. We are proposing a new drilling campaign that will constrain the timing, rates of volcanism, and vertical movements of rifted margins. This will allow us to parameterise geodynamic models that can distinguish between the hypotheses. Furthermore, the drilling-derived data will help us to understand the role of breakup magmatism as a potential driver for the Palaeocene–Eocene thermal maximum (PETM) and its influence on the oceanographic circulation in the earliest phase of the northeast Atlantic Ocean formation. Tackling these questions with a new drilling campaign in the northeast Atlantic region will advance our understanding of the long-term interactions between tectonics, volcanism, oceanography, and climate and the functioning of subpolar northern ecosystems and climate during intervals of extreme warmth.

• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge; Serck, Christopher Sæbø & Nystuen, Johan Petter (2019). Characterisation and development of Early Cretaceous shelf platform deposition and faulting in the Hoop area, southwestern Barents Sea—constrained by high-resolution seismic data. Norwegian Journal of Geology.  ISSN 2387-5844.  99(3), s 1- 20 . doi: 10.17850/njg99-3-7 Fulltekst i vitenarkiv. Vis sammendrag

  Regional Early Cretaceous uplift of the northern Barents Sea associated with the High Arctic Large Igneous Province (HALIP) caused the development of the fluvial to open-marine depositional system, terminating in the southwestern Barents Sea. This study has established a new temporal and spatial evolution of the Lower Cretaceous deposits in the Hoop area, in particular the location and age of the intrashelf platform lobe front and subsequent block-faulting. A composite high-resolution 3D and 2.5D P-Cable and conventional 3D seismic dataset image the strata and cross-cutting faults in the Hoop area. The P-Cable data typically have a resolution of 3–7 m in the shallow subsurface, up to four times better than the conventional seismic data, contributing to a new and better mapping hence understanding of the Lower Cretaceous strata and faults. Seismic horizon and facies mapping reveal large-scale clinoforms, with present-day heights of 150–200 m and dips of 0.65–1.13°. The highresolution data furthermore display complex stratigraphic and structural features, such as small-scale clinoforms and numerous faults. The shelf platform succession is block-faulted, and the main Early Cretaceous fault activity thus postdates the arrival of the delta and platform sediments from the northwest. Detailed seismo-stratigraphic ties to the 7324/2–1 (Apollo) and 7325/1–1 (Atlantis) wells, and ties to the adjacent Fingerdjupet Subbasin, document a Barremian age for the shelf platform deposits and an Aptian?–early Albian age for the main faulting event. The faulting was likely initiated in the Aptian, but a hiatus or condensed section above the Barremian strata makes it difficult to constrain the onset of deformation in the Hoop area.

• 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
• 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.
• 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.

• Klitzke, Peter; Franke, Dieter; Ehrhardt, Axel; Lutz, Rüdiger; Reinhardt, Lutz; Heyde, Ingo & Faleide, Jan Inge (2019). The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny. Geochemistry Geophysics Geosystems.  ISSN 1525-2027.  20(2), s 614- 629 . doi: 10.1029/2018GC007814 Fulltekst i vitenarkiv.
• Midtkandal, Ivar; Faleide, Jan Inge; Faleide, Thea Sveva; Serck, Christopher Sæbø; Planke, Sverre; Corseri, Romain; Dimitriou, Myrsini & Nystuen, Johan Petter (2019). Lower Cretaceous Barents Sea strata: epicontinental basin configuration, timing, correlation and depositional dynamics. Geological Magazine.  ISSN 0016-7568. . doi: 10.1017/S0016756819000918
• Midtkandal, Ivar; Faleide, Thea Sveva; Faleide, Jan Inge; Planke, Sverre; Anell, Ingrid Margareta & Nystuen, Johan Petter (2019). Nested intrashelf platform clinoforms—Evidence of shelf platform growth exemplified by Lower Cretaceous strata in the Barents Sea. Basin Research.  ISSN 0950-091X. . doi: 10.1111/bre.12377 Fulltekst i vitenarkiv.
• Müller, Reidar; Klausen, Tore Grane; Faleide, Jan Inge; Olaussen, Snorre; Eide, Christian Haug & Suslova, Anna A. (2019). Linking regional unconformities in the Barents Sea to compression-induced forebulge uplift at the Triassic-Jurassic transition. Tectonophysics.  ISSN 0040-1951.  765, s 35- 51 . doi: 10.1016/j.tecto.2019.04.006 Fulltekst i vitenarkiv.
• Phillips, Tom; Fazli Khani, Hamed; Gawthorpe, Rob; Fossen, Haakon; Jackson, Christopher Aiden Lee; Bell, Rebecca E.; Faleide, Jan Inge & Rotevatn, Atle (2019). The influence of structural inheritance and multiphase extension on rift development, the northern North Sea. Tectonics.  ISSN 0278-7407.  38(12), s 4099- 4126 . doi: 10.1029/2019TC005756 Fulltekst i vitenarkiv.
• Tsikalas, Filippos; Faleide, Jan Inge & Kalac, Amra (2019). New insights into the Cretaceous-Cenozoic tectono-stratigraphic evolution of the southern Lofoten margin, offshore Norway. Marine and Petroleum Geology.  ISSN 0264-8172.  110, s 832- 855 . doi: 10.1016/j.marpetgeo.2019.07.025 Vis sammendrag

  The tectono-stratigraphic evolution of the southern Lofoten margin and its immediate transition towards the northern Vøring margin has been studied in detail utilizing 2D multi-channel seismic reflection profiles, available wells, in addition to gravity and magnetic data. New and better refined structural elements have been mapped within the study area, including (informally named) the West Røst High Fault Complex, Røst Syncline, and Sandflesa High. Furthermore, four main rift phases have been recognised and refined. Late Jurassic-earliest Cretaceous rifting controlled the initial structuring of the main structural elements. Mid-Cretaceous rifting was responsible for initiation of faulting in the West Røst High Fault Complex, while a composite Late Cretaceous rift phase took place and led to westward propagation of fault activity. Paleocene rifting generated new faults and reactivated several earlier faults, prior to continental breakup and seafloor spreading initiation at the Paleocene- Eocene transition. The Bivrost Lineament, separating the southern Lofoten and northern Vøring margins, has exhibited a distinct morphological expression during Cretaceous-Cenozoic and is recognised as a structural “corridor” which segments highs and basins/sub-basins. Furthermore, two dome-shaped features have been observed on the southern Lofoten margin and have probably experienced several phases of growth from Late Cretaceous to Miocene times. The domes are located in close proximity to the outer Vøring margin and Bivrost Lineament that are believed to have facilitated the transfer of imposed compressional deformation on the NE Atlantic margins. Finally, a comparison of the study area to the conjugate Northeast Greenland margin provides valuable insights on the margin evolution in a regional and conjugate setting.

• Wrona, Thilo; Magee, Craig; Fossen, Haakon; Gawthorpe, Rob; Bell, Rebecca E.; Jackson, Christopher Aiden Lee & Faleide, Jan Inge (2019). 3-D seismic images of an extensive igneous sill in the lower crust. Geology.  ISSN 0091-7613.  47(8), s 729- 733 . doi: 10.1130/G46150.1 Fulltekst i vitenarkiv.
• Abdelmalak, Mohamed Mansour; Planke, Sverre; Polteau, Stephane; Hartz, Ebbe Hvidegård; Faleide, Jan Inge; Tegner, Christian; Jerram, Dougal Alexander; Millett, John M & Myklebust, Reidun (2018). Breakup volcanism and plate tectonics in the NW Atlantic. Tectonophysics.  ISSN 0040-1951.  760, s 267- 296 . doi: 10.1016/j.tecto.2018.08.002
• Bugge, Aina J.; Clark, Stuart R; Lie, Jan Erik & Faleide, Jan Inge (2018). A case study on semiautomatic seismic interpretation of unconformities and faults in the southwestern Barents Sea. Interpretation.  ISSN 2324-8858.  6(2) . doi: 10.1190/INT-2017-0152.1
• Corseri, Romain; Faleide, Thea Sveva; Faleide, Jan Inge; Midtkandal, Ivar; Serck, Christopher Sæbø; Trulsvik, Mikal & Planke, Sverre (2018). A diverted submarine channel of Early Cretaceous age revealed by high-resolution seismic data, SW Barents Sea. Marine and Petroleum Geology.  ISSN 0264-8172.  98, s 462- 476 . doi: 10.1016/j.marpetgeo.2018.08.037 Fulltekst i vitenarkiv.
• Ershova, Victoria; Anfinson, Owen; Prokopiev, Andrei; Khudoley, Andrei; Stockli, Daniel; Faleide, Jan Inge; Gaina, Carmen & Malyshev, Nikolay (2018). Detrital zircon (U-Th)/He ages from Paleozoic strata of the Severnaya Zemlya Archipelago: Deciphering multiple episodes of Paleozoic tectonic evolution within the Russian High Arctic. Journal of Geodynamics.  ISSN 0264-3707.  119, s 210- 220 . doi: 10.1016/j.jog.2018.02.007 Fulltekst i vitenarkiv.
• Gac, Sebastien; Hansford, Peter Anthony & Faleide, Jan Inge (2018). Basin modelling of the SW Barents Sea. Marine and Petroleum Geology.  ISSN 0264-8172.  95, s 167- 187 . doi: 10.1016/j.marpetgeo.2018.04.022 Fulltekst i vitenarkiv.
• 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.
• Koehl, Jean-Baptiste; Bergh, Steffen G; Henningsen, Tormod & Faleide, Jan Inge (2018). Middle to Late Devonian–Carboniferous collapse basins on the Finnmark Platform and in the southwesternmost Nordkapp basin, SW Barents Sea. Solid Earth (SE).  ISSN 1869-9510.  9(2), s 341- 372 . doi: 10.5194/se-9-341-2018 Fulltekst i vitenarkiv.
• Medvedev, Sergei; Hartz, Ebbe Hvidegård & Faleide, Jan Inge (2018). Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography. Journal of Geodynamics.  ISSN 0264-3707.  119, s 62- 81 . doi: 10.1016/j.jog.2018.04.003 Fulltekst i vitenarkiv.
• Shulgin, Alexey A; Mjelde, Rolf; Faleide, Jan Inge; Høy, Tore; Flueh, Ernst & Thybo, Hans (2018). The crustal structure in the transition zone between the western and eastern Barents Sea. Geophysical Journal International.  ISSN 0956-540X.  214(1), s 315- 330 . doi: 10.1093/gji/ggy139 Fulltekst i vitenarkiv.
• Yenwongfai, Honore Dzekamelive; Mondol, Nazmul Haque; Lecomte, Isabelle; Faleide, Jan Inge & Leutscher, Johan (2018). Integrating facies-based Bayesian inversion and supervised machine learning for petro-facies characterization in the Snadd Formation of the Goliat Field, south-western Barents Sea. Geophysical Prospecting.  ISSN 0016-8025.  67, s 1020- 1039 . doi: 10.1111/1365-2478.12654 Fulltekst i vitenarkiv. Vis sammendrag

  Seismic petro‐facies characterization in low net‐to‐gross reservoirs with poor reservoir properties such as the Snadd Formation in the Goliat field requires a multidisciplinary approach. This is especially important when the elastic properties of the desired petro‐facies significantly overlap. Pore fluid corrected endmember sand and shale depth trends have been used to generate stochastic forward models for different lithology and fluid combinations in order to assess the degree of separation of different petro‐facies. Subsequently, a spectral decomposition and blending of selected frequency volumes reveal some seismic fluvial geomorphological features. We then jointly inverted for impedance and facies within a Bayesian framework using facies‐dependent rock physics depth trends as input. The results from the inversion are then integrated into a supervised machine learning neural network for effective porosity discrimination. Probability density functions derived from stochastic forward modelling of endmember depth trends show a decreasing seismic fluid discrimination with depth. Spectral decomposition and blending of selected frequencies reveal a dominant NNE trend compared to the regional SE–NW pro‐gradational trend, and a local E–W trend potentially related to fault activity at branches of the Troms‐Finnmark Fault Complex. The facies‐based inversion captures the main reservoir facies within the limits of the seismic bandwidth. Meanwhile the effective porosity predictions from the multilayer feed forward neural network are consistent with the inverted facies model, and can be used to qualitatively highlight the cleanest regions within the inverted facies model. A combination of facies‐based inversion and neural network improves the seismic reservoir delineation of the Snadd Formation in the Goliat Field.

• Zastrozhnov, Dmitrii; Gernigon, Laurent; Gogin, I; Abdelmalak, Mohamed Mansour; Planke, Sverre; Faleide, Jan Inge; Eide, S. & Myklebust, R. (2018). Cretaceous-Paleocene Evolution and Crustal Structure of the Northern V?ring Margin (Offshore Mid-Norway): Results from Integrated Geological and Geophysical Study. Tectonics.  ISSN 0278-7407.  37(2), s 497- 528 . doi: 10.1002/2017TC004655
• Aarseth, Iselin; Mjelde, Rolf; Breivik, Asbjørn Johan; Minakov, Alexander; Faleide, Jan Inge; Flueh, Ernst R. & Huismans, Ritske (2017). Crustal structure and evolution of the Arctic Caledonides: Results fromcontrolled-source seismology. Tectonophysics.  ISSN 0040-1951.  718, s 9- 24 . doi: 10.1016/j.tecto.2017.04.022 Fulltekst i vitenarkiv.
• Abdelmalak, Mohamed Mansour; Faleide, Jan Inge; Planke, Sverre; Gernigon, Laurent; Zastrozhnov, Dmitry; Shephard, Grace & Myklebust, Reidun (2017). The T-Reflection and the Deep Crustal Structure of the Vøring Margin, Offshore mid-Norway. Tectonics.  ISSN 0278-7407.  36(11), s 2497- 2523 . doi: 10.1002/2017TC004617 Fulltekst i vitenarkiv.
• Blaich, Olav Antonio; Tsikalas, Filippos & Faleide, Jan Inge (2017). New insights into the tectono-stratigraphic evolution of the southern Stappen High and its transition to Bjørnøya Basin, SW Barents Sea. Marine and Petroleum Geology.  ISSN 0264-8172.  85, s 89- 105 . doi: 10.1016/j.marpetgeo.2017.04.015
• Breivik, Asbjørn Johan; Faleide, Jan Inge; Mjelde, Rolf; Flueh, Ernst R. & Murai, Yoshio (2017). A new tectono-magmatic model for the Lofoten/Vesterålen Margin at the outer limit of the Iceland Plume influence. Tectonophysics.  ISSN 0040-1951.  718, s 25- 44 . doi: 10.1016/j.tecto.2017.07.002 Fulltekst i vitenarkiv.
• Ershova, Victoria B.; Prokopiev, Andrei V.; Sobolev, Nikolai N.; Petrov, EO; Khudoley, Andrey K.; Faleide, Jan Inge; Gaina, Carmen & Belyakova, RV (2017). New data on the basement of Franz Josef Land, Arctic region. Geotectonics.  ISSN 0016-8521.  51(2), s 121- 130 . doi: 10.1134/S0016852117020030
• Faleide, Jan Inge; Pease, Victoria; Curtis, Mike; Klitzke, Peter; Minakov, Alexander; Scheck-Wenderoth, Magdalena; Kostyuchenko, Sergei & Zayonchek, Andrei (2017). Tectonic implications of the lithospheric structure across the Barents and Kara shelves. Geological Society Special Publication.  ISSN 0305-8719.  460, s 285- 314 . doi: 10.1144/SP460.18 Fulltekst i vitenarkiv. Vis sammendrag

  This paper considers the lithospheric structure and evolution of the wider Barents–Kara Sea region based on the compilation and integration of geophysical and geological data. Regional transects are constructed at both crustal and lithospheric scales based on the available data and a regional three-dimensional model. The transects, which extend onshore and into the deep oceanic basins, are used to link deep and shallow structures and processes, as well as to link offshore and onshore areas. The study area has been affected by numerous orogenic events in the Precambrian– Cambrian (Timanian), Silurian–Devonian (Caledonian), latest Devonian–earliest Carboniferous (Ellesmerian–Svalbardian), Carboniferous–Permian (Uralian), Late Triassic (Taimyr, Pai Khoi and Novaya Zemlya) and Palaeogene (Spitsbergen -Eurekan). It has also been affected by at least three episodes of regional-scale magmatism, the so-called large igneous provinces: the Siberian Traps (Permian–Triassic transition), the High Arctic Large Igneous Province (Early Cretaceous) and the North Atlantic (Paleocene–Eocene transition). Additional magmatic events occurred in parts of the study area in Devonian and Late Cretaceous times. Within this geological framework, we integrate basin development with regional tectonic events and summarize the stages in basin evolution. We further discuss the timing, causes and implications of basin evolution. Fault activity is related to regional stress regimes and the reactivation of pre-existing basement structures. Regional uplift/subsidence events are discussed in a source-to-sink context and are related to their regional tectonic and palaeogeographical settings.

• Fazli Khani, Hamed; Fossen, Haakon; Gawthorpe, Robert; Faleide, Jan Inge & Bell, Rebecca E. (2017). Basement structure and its influence on the structural configuration of the northern North Sea rift. Tectonics.  ISSN 0278-7407.  36(6), s 1151- 1177 . doi: 10.1002/2017TC004514 Fulltekst i vitenarkiv.

Se alle arbeider i Cristin

• Gresseth, J.L.S; Braathen, Alvar; Serck, Christopher Sæbø; Faleide, Jan Inge & Osmundsen, Per Terje (2021). Late Paleozoic Supradetachment Basin Configuration in SW Barents Sea – intrabasement Seismic Facies of the Fingerdjupet Subbasin..
• Mulrooney, Mark Joseph; Osmond, Johnathon L.; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2021). Structural analysis of the Smeaheia fault block, a potential CO2 storage site, northern Horda Platform. Vis sammendrag

  Smeaheia, a prominent fault block located on the Horda Platform, northern North Sea is identified as a potential subsurface CO2 storage site. We utilise the GN1101 3D and regional 2D seismic surveys to generate a high-resolution subsurface geomodel to inform the structural style and evolution of the fault block, to investigate geological controls on proposed CO2 storage and provide a geometric framework as a basis for future analyses. Two basement-involved (first-order) north-south trending fault systems, the Vette Fault Zone (VFZ) and the Øygarden Fault Complex (ØFC), bound the 15 km-wide fault block. Apart from activity during the Permo-Triassic (Rift Phase 1) and the Late Jurassic–Early Cretaceous (Rift Phase 2), we present evidence that rifting in this part of the North Sea continued into the Late Cretaceous with minor reactivation in the Palaeocene–Eocene. Two segments of the VFZ interacted and linked at a relay ramp during Rift Phase 2. Second-order (thin-skinned) faults show basement affinity and developed during Rift Phase 2 in two distinct pulses. A population of polygonal faults intersects the overburden and developed during the Eocene to middle Miocene. We have revised the areal extent of two structural closures that define the Smeaheia fault block, Alpha (VFZ footwall) and Beta (ØFC hanging wall) which consist of Upper Jurassic Viking Group target formations. Cross-fault juxtaposition analysis of the VFZ and second-order intra-block faults are presented and inform pressure communication pathways between the Smeaheia and Tusse fault block, as well as reservoir integrity and compartmentalisation. The geomodel further identifies important geological controls on CO2 storage in the fault block including a thinning caprock above the Alpha structure, and identification of hard-linkage between deep tectonic faults and shallow polygonal faults. Fault reactivation analysis was conducted on depth-converted faults to determine the risk of up-fault CO2 migration. Hydrostatic and depleted scenarios were modelled. Faults are modelled as classic cohesionless structures but also utilising parameters (cohesion and friction angle) derived from host rock mechanical analysis.

• Osmond, Johnathon L.; Holden, Nora; Leon, Elias H.; Mulrooney, Mark Joseph; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2021). Top and lateral seal characterizations for CO2 storage in Jurassic saline aquifers of the Horda Platform.
• Osmond, Johnathon Lee; Faleide, Jan Inge; Nystuen, Johan Petter; Anell, Ingrid Margareta & Midtkandal, Ivar (2021). Syn- to post rift alluvial basin fill: seismic stratigraphic analysis of Permian-Triassic deposition in the Horda Platform.
• Osmond, Johnathon Lee; Faleide, Jan Inge; Nystuen, Johan Petter; Anell, Ingrid Margareta & Midtkandal, Ivar (2021). Syn- to post rift alluvial basin fill: seismic stratigraphic analysis of Permian-Triassic deposition in the Horda Platform.
• Würtzen, Camilla Louise; Osmond, Johnathon L.; Faleide, Jan Inge; Nystuen, Johan Petter; Anell, Ingrid Margareta & Midtkandal, Ivar (2021). Syn- to post rift alluvial basin fill: seismic stratigraphic analysis of Permian-Triassic deposition in the Horda Platform.
• Baig, Irfan & Faleide, Jan Inge (2020). Quaternary evolution of the North Sea Basin and its relevance to hydrocarbon exploration.
• Faleide, Jan Inge (2020). observations on Devono-Permian evolution of Central North Sea.
• 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.
• 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.
• 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.
• 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.
• Medvedev, Sergei; Hartz, Ebbe Hvidegård & Faleide, Jan Inge (2020). Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography.
• Midtkandal, Ivar; Holbrook, John; Faleide, Jan Inge; Myers, Cody; van Yperen, Anna Elisabeth; Shephard, Grace & Nystuen, Johan Petter (2020). Testing arctic tectonic plate models with Cretaceous sediment source to sink budgets.
• Mulrooney, Mark Joseph; Osmond, Johnathon L.; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2020). Summary of manuscript: Structural analysis of the Smeaheia fault block, a potential CO2 storage site, northern Horda Platform, North Sea.
• Nipen, Helge; Midtkandal, Ivar; Faleide, Jan Inge & Braathen, Alvar (2020). Permo-Triassic basin development on the Horda Platform and Stord Basin - Prerift architecture and rift phase 1 evolution.
• Osmond, Johnathon L.; Holden, Nora; Mulrooney, Mark Joseph; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2020). Ongoing top and lateral seal characterizations for CO2 storage in the Horda Platform.
• Osmond, Johnathon L.; Mulrooney, Mark Joseph; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2020). Horda Platform geology and CCS research discussion.
• Osmond, Johnathon L.; Mulrooney, Mark Joseph; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2020). Horda Platform geology and CCS research discussion.
• Osmond, Johnathon L.; Mulrooney, Mark Joseph; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2020). Horda Platform geology and CCS research discussion.
• Osmond, Johnathon L.; Mulrooney, Mark Joseph; Skurtveit, Elin; Faleide, Jan Inge & Braathen, Alvar (2020). Ongoing top and lateral seal characterizations for CO2 storage in the Horda Platform.
• Serck, Christopher Sæbø; Riber, Lars; Braathen, Alvar & Faleide, Jan Inge (2020). Permo-Triassic extension of the southern Utsira High - testing concepts.
• Bellwald, Benjamin; Planke, Sverre; Polteau, Stephane; Lebedeva-Ivanova, Nina; Faleide, Jan Inge; Morris, S; Morse, S. & Castelltort, Sébastien (2019). Bjørnelva: A Pleistocene braided river imaged in high- resolution 3D seismic data in the SW Barents Sea. NGF Abstracts and Proceedings of the Geological Society of Norway.  (1)
• Gernigon, Laurent; Zastrozhnov, Dmitrii; Abdelmalak, Mohamed Mansour; Planke, Sverre; Faleide, Jan Inge & Myklebust, Reidun (2019). A new structural and magmatic elements map of the mid-Norwegian margin. NGF Abstracts and Proceedings of the Geological Society of Norway.  (1)
• Planke, Sverre; Corseri, Romain; Polteau, Stephane; Faleide, Jan Inge; Midtkandal, Ivar; Faleide, Thea Sveva; Senger, Kim; Myklebust, Reidun & Tegner, Christian (2019). HALIP Implications for Early Cretaceous Sedimentation in the Barents Sea.
• Zastrozhnov, Dmitrii; Gernigon, Laurent; Gogin, I; Planke, Sverre; Faleide, Jan Inge; Manton, Ben; Abdelmalak, Mohamed Mansour; Iyer, Karthik Herman; Schmid, Daniel Walter & Myklebust, Reidun (2019). Cretaceous-Paleocene tectonostratigraphic development of the Møre and Vøring basins, offshore Mid-Norway. NGF Abstracts and Proceedings of the Geological Society of Norway.  (1)
• Baig, Irfan & Faleide, Jan Inge (2019). Modeling of isostatic response to deposition and erosion in the North Sea Basin.
• Baig, Irfan & Faleide, Jan Inge (2019). Quaternary sediment distribution, source areas and depositional environments in the central and northern North Sea.
• Breivik, Asbjørn Johan; Faleide, Jan Inge; Mjelde, Rolf; Flueh, Ernst R. & Murai, Yoshio (2019). Wide angle seismic data constraints on crustal structure and erosion of the northernmost Norwegian shelf. Vis sammendrag

  The Norwegian continental shelf has been through several rift phases since the Caledonian orogeny. Early Cretaceous rifting created the largest sedimentary basins, and Early Cenozoic continental breakup between East Greenland and Europe affected the continental shelf to various degrees. The Lofoten/Vesterålen shelf is located off Northern Norway, bordering the epicontinental Barents Sea to the northeast, and the oceanic Lofoten Basin to the west. An ocean bottom seismometer (OBS) survey was conducted over the area in 2003. This study documents Profile 8-03, located between the outer islands and the shelf edge. The wide-angle seismic data were modeled using raytracing to build a crustal velocity-depth transect. Gravity modeling could resolve an ambiguity in seismic Moho identification in the south. Results show a crustal thickness of 30-31 km, thicker and thus less affected by breakup tectonism than previously believed. The results of the new survey shows that older nearby refraction profiles may be too short to constrain Moho depth in the area. Profile 8-03 and other OBS profiles to the southwest show high sedimentary velocities at or near the seafloor, suggesting greater burial in the past. Velocities from the current profile and from a previously published crossing profile of the same survey were compared to the velocity-depth function derived from an OBS profile at the Barents Sea margin, tied to a coincident well log, where there is little erosion. Results indicate three major erosion episodes; Late Triassic-Early Jurassic, tentatively mid-Cretaceous, Late Cretaceous-early Cenozoic breakup-related, and a minor late glacial erosion episode off Vesterålen.

• Corseri, Romain; Faleide, Thea Sveva; Faleide, Jan Inge; Midtkandal, Ivar; Serck, Christopher Sæbø; Trulsvik, Mikal & Planke, Sverre (2019). A diverted submarine channel of Early Cretaceous age revealed by integration of P-Cable seismic and CSEM data in the SW Barents Sea. NGF Abstracts and Proceedings of the Geological Society of Norway.  (1)
• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge; Nystuen, Johan Petter; Anell, Ingrid Margareta & Braathen, Alvar (2019). High-resolution seismic imaging and modelling of structural and stratigraphical features in the SW Barents Sea. Vis sammendrag

  Poster at the AAPG 2019 conference, San Antonio, Texas, USA

• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge; Nystuen, Johan Petter & Braathen, Alvar (2019). Barremian delta and Early Cretaceous faulting revealed by high resolution 3D seismic data in the southwestern Barents Sea. NGF Abstracts and Proceedings of the Geological Society of Norway.  (1)
• 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..
• Hassaan, Muhammad; Faleide, Jan Inge; Gabrielsen, Roy Helge & Tsikalas, Filippos (2019). Carboniferous Graben Structures, Evaporite Accumulations and Inversion in the Southeastern Norwegian Barents Sea. 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). Carboniferous graben structures, evaporite accumulations and tectonic inversion in southeastern Norwegian Barents Sea.. 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). Control of Carboniferous Graben Structures on Evaporite Accumulation and Domes Location in Southeastern Norwegian Barents Sea. Vis sammendrag

  We utilize available seismic and well data, and focus on the distribution, orientation of deep-seated Carboniferous graben structures and their control on the domes in the southeastern Norwegian Barents Sea. We map prominent NW-SE trending that represents Timanian Orogeny trend, deep-seated Carboniferous graben structures separated by platforms and structural highs. Evaporites were accumulated in the deep basins, while carbonates occupied the highs. Several distinct domes at top Gipsdalen to Cretaceous levels are present within the study area, including the Haapet, Veslekari, and Signalhorn domes, and the central domal feature of the Fedynsky High. The spatial analysis of graben structures, evaporite accumulation, and domes reveal that the deep-seated Carboniferous structures strongly control the distribution and partially the evolution of the domes along with facies variations. Effect of salt mobilization on the dome evolution is dependent on the lithological variations (mobile and immobile evaporites and carbonates) and thickness. Lateral thickness variations of the uppermost Triassic to the lowermost Cretaceous sediments, the Cretaceous onlaps to the Jurassic successions and erosion of the residual Cretaceous strata, all suggest a multiphase evolution of the domes. We propose Paleogene timing for the main phase of reactivation of the domes, probably in response to regional compressional stresses.

• 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. 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.

• Lasabuda, Amando Putra Ersaid; Laberg, Jan Sverre; Faleide, Jan Inge; Knutsen, Stig-Morten; Rydningen, Tom Arne & Hanssen, Alfred (2019). Reviewing Cenozoic uplift and erosion of the Barents Sea: a new net erosion map from integration of various methods.
• Planke, Sverre; Millett, John; Jerram, Dougal Alexander; Zastrozhnov, Dmitrii; Maharjan, Dwarika; Manton, Ben; Faleide, Jan Inge; Walker, Faye & Myklebust, Reidun (2019). Igneous seismic geomorphology of Paleogene basalts in the West of Shetland, Møre, and Vøring basins. NGF Abstracts and Proceedings of the Geological Society of Norway.  (1)
• Shephard, Grace; Abdelmalak, Mohamed Mansour; Gaina, Carmen; Faleide, Jan Inge; Torsvik, Trond Helge; Jackson, Ruth; Oakey, Gordon; Li, Qingmou & Piepjohn, Karsten (2019). A Greenland centered puzzle: Updated plate reconstructions of the North Atlantic and Arctic.
• Shephard, Grace; Gaina, Carmen; Torsvik, Trond Helge & Faleide, Jan Inge (2019). Plate tectonics and mantle structure of the Arctic, North Atlantic, and Panthalassa: recent updates.
• Tsikalas, Filippos; Faleide, Jan Inge & Kalac, Amra (2019). New insights into the Cretaceous and Cenozoic tectono-stratigraphic evolution of the southern Lofoten and northern Vøring margins, offshore northern Norway. Vis sammendrag

  The northern Vøring and southern Lofoten margins are located offshore northern Norway, and are separated by the Bivrost Lineament. While the Vøring margin is extensively studied, the Lofoten-Vesterålen margin is one of the least explored areas on the Norwegian continental shelf. The tectono-stratigraphic evolution of the study area has been studied in detail utilizing several datasets: 2D multi-channel seismic reflection profiles, well-to-seismic ties and stratigraphic information from four exploration wells, in addition to gravity and magnetic data. The main focus of the work has been on seismic and structural interpretation in order to refine the rift phases that affected the study area and to decipher the eventual role of the Bivrost Lineament, as well as to improve the understanding of the evolution the West Røst High Fault Complex and the outer Lofoten margin. Four main rift phases have been recognised and refined in the study area. Late-Jurassic-earliest Cretaceous rifting controlled the initial structuring of the main structural elements. Mid Cretaceous rifting is responsible for initiation of faulting in the West Røst High Fault Complex, while rifting continued during Late Cretaceous and led to a westward propagation of fault activity. Paleocene rifting reactivated several Late Jurassic-earliest Cretaceous and Cretaceous faults, prior to continental breakup and seafloor spreading initiation at the Paleocene-Eocene transition. The Bivrost Lineament is recognized as a major margin boundary with an uncertain exact location, which segments highs and sub-basins on the northern Vøring and southern Lofoten margins. Furthermore, two dome-shaped features have been observed on the southern Lofoten margin, which probably experienced several phases of growth from Late Cretaceous to Miocene times, reaching their maximum dimensions during Middle Miocene. The tectono-stratigraphic evolution of the study area is compared to the conjugate Northeast Greenland margin, to get a better understanding of the evolution in a regional and conjugate context.

• Tsikalas, Filippos; Faleide, Jan Inge & Kalac, Amra (2019). New insights into the Cretaceous tectono-stratigraphic evolution of the southern Lofoten and northern Vøring margins, offshore northern Norway. Vis sammendrag

  The southern Lofoten and northern Vøring margins are located offshore northern Norway, and are separated by the Bivrost Lineament. While the Vøring margin is extensively studied, the Lofoten margin is one of the least explored areas on the Norwegian continental shelf. The study area is mainly located within the Nordland VI (currently not open for exploration) petroleum province. The tectono-stratigraphic evolution of the southern Lofoten margin and its immediate transition towards the northern Vøring margin has been studied in detail utilizing reprocessed 2D multi-channel seismic reflection profiles, available wells, in addition to gravity and magnetic data (Tsikalas et al., 2019). The southern Lofoten margin is an important area to study the Cretaceous tectono-stratigraphic evolution as the, otherwise deeply buried Cretaceous strata in the Vøring Basin that are locally obscured by intensive magmatic intrusions, are structurally elevated and thus better imaged along the southern Lofoten margin. The study has highlighted details on the Cretaceous evolution that can be particularly important and applicable to the rest of the Norwegian Sea. In this context, beyond the refinements to the regionally dominant Late Jurassic-earliest Cretaceous rifting, there is clear evidence for intra Early Cretaceous (Aptian-Albian) and mid-Cretaceous (Albian-Cenomanian) rifting that affected the study area. More importantly, the study provides details on the onset and evolution of the composite Late Cretaceous rift phase that affected the area and gave rise to prominent westward-dipping low-angle detachment faults. One better refined, the Sandflesa High, and two new structural elements, informally named Røst Syncline and West Røst High Fault Complex, have been defined within the study area. The Sandflesa High is a basement high located southwest of the Røst High near the landward breakup lava boundary, while the Røst Syncline is defined as a narrow but distinctly steep and deep basin separating the Sandflesa High and the Røst High/Utrøst Ridge. The West Røst High Fault Complex represents an updomed structure that lies west of the Røst High and exhibits prominent and intense NE-SW trending and west-dipping low-angle detachment faults. Faulting was initiated to the east and gradually propagated towards west. It was first initiated during Cenomanian-Turonian (early Late Cretaceous), and was followed by almost tectonic quiescence prior to a Campanian? faulting activity that is the most prominent of the various Late Cretaceous rift phases as evidenced by the extensive lateral thickness variations across faults. Followed by an uppermost Cretaceous-Paleocene faulted sequence and an equivalent time rifting stage, Paleocene faults are clearly observed to be steeper in comparison to the Cretaceous faults. Regional conjugate correlations between the southern Lofoten and East/Northeast Greenland margins show that low-angle Late Cretaceous detachment faults, with a possible similar onset of the main rift phase in middle Campanian, are characteristic for both conjugate margins. Finally, the Bivrost Lineament separates the Lofoten-Vesterålen and northern Vøring margins and is defined as a structural “corridor” with clear termination of main structural elements in its vicinity. The study shows that the lineament exhibits only a minimal expression of an obvious composite lateral offset. Furthermore, the Bivrost Lineament was a low-relief Late Jurassic-Early Cretaceous accommodation zone, which experienced reactivation during Late Cretaceous-Paleocene rifting.

• Faleide, Jan Inge (2018). Barents Sea basin evolution - in time and space.
• 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.
• Koehl, Jean-Baptiste P.; Bergh, Steffen G; Henningsen, Tormod; Faleide, Jan Inge; Smyrak-Sikora, Aleksandra; Olaussen, Snorre & Johannessen, Erik P. (2018). Mid/Late Devonian-early Carboniferous collapse basins in the Barents Sea and Svalbard.
• Baig, Irfan; Faleide, Jan Inge; Hjelstuen, Berit Oline Blihovde; Sejrup, Hans Petter; Nystuen, Johan Petter; Aagaard, Per; Jahren, Jens & Mondol, Nazmul Haque (2017). Seismic mapping of Quaternary sediment distribution in the central and northern North Sea.
• Baig, Irfan; Faleide, Jan Inge; Jahren, Jens & Mondol, Nazmul Haque (2017). Burial and exhumation history controls on shale compaction and thermal maturity along the Norwegian North Sea margin.
• Blaich, Olav Antonio; Tsikalas, Filippos & Faleide, Jan Inge (2017). Tectono-stratigraphic evolution of the Southern Stappen High and its transition to Bjørnøya Basin, SW Barents Sea. Vis sammendrag

  Within the context of the southwestern Barents Sea, the southern Stappen High and its transition to the Bjørnøya Basin are more or less still underexplored. Improved quality seismic reflection data are utilised to describe new insights into the Paleozoic to early Cenozoic tectono-stratigraphic evolution of the area, as well as to discuss the structural inheritance and the rift development. Well-defined syn-rift wedges and better resolution images for both the deep Carboniferous and Permian successions are revealed. In particular, both the mid-Carboniferous and Late Permian-earliest Triassic extensional phases are characterized by widespread NE-SW oriented normal faults that are mostly westward dipping. Although Triassic is mostly considered as a tectonically stable period in the Barents Sea, in the Stappen High proper there is clear identification of a localised depocentre (named herein “Intra Stappen Basin”) that extends for ~70 km where syn-tectonic geometries characterize the late Paleozoic and Triassic deposits, indicating tectonically active bounding faults. Regional correlation to Middle and Upper Triassic outcrops in southwestern Svalbard reveals possible similarities to progradation from a west-northwest Northeast Greenland provenance as an additional western sediment source area during the Triassic. Thin but distinct Jurassic sequences are expected to be present on Stappen High associated with prominent regional NW-SE extension throughout Late Jurassic that culminated during the earliest Cretaceous. Furthermore, structural and stratigraphic relations are observed within the study area that clearly indicate a distinct early Aptian rift phase with increasing evidence for its occurrence in the southwestern Barents Sea. Late Cretaceous fault activity was concentrated mostly at the greater Knølegga Fault Complex zone in southwest Stappen High with thick Late Cretaceous sequences bounded by impressive low-angle west-dipping detachment faults, implying a shift at that time from a brittle to a more ductile structural regime. During early Cenozoic, the study area is located at the proximity of the paleo-coastline and paleo-shelf edge for both Paleocene and Eocene gravity mass-waste deposits. These are most probably related to a progressively evolving steep bathymetric gradient between the developing margin, mainly towards the west and to the south, and uplifted areas in the region.

• Breivik, Asbjørn Johan; Faleide, Jan Inge; Mjelde, Rolf; Flueh, Ernst R. & Murai, Yoshio (2017). Origin of the Vøring Plateau, offshore Norway – interplay between timing of rifting and emplacement of plume material.
• Breivik, Asbjørn Johan; Faleide, Jan Inge; Mjelde, Rolf; Flueh, Ernst R. & Murai, Yoshio (2017). The Transition from Volcanic to Rift Dominated Crustal Breakup – From the Vøring Plateau to the Lofoten Margin, Norway.
• Faleide, Jan Inge (2017). Barents shelf tectonic evolution – recent advances.
• Faleide, Jan Inge (2017). Cenozoic evolution of the western Barents Sea-Svalbard margin.
• Faleide, Jan Inge (2017). Integrated Basin Studies – with examples from the Barents Sea.
• Faleide, Jan Inge (2017). Late Paleozoic-Mesozoic basin evolution in the SW Barents Sea – North Atlantic-Arctic links.
• Faleide, Jan Inge; Abdelmalak, Mohamed Mansour; Shephard, Grace; Torsvik, Trond Helge; Gaina, Carmen; Tsikalas, Filippos; Blaich, Olav Antonio; Planke, Sverre & Myklebust, Reidun (2017). Quantification and restoration of pre-drift extension across NE Atlantic conjugate margins.

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