Johan Petter Nystuen

• Würtzen, Camilla Louise; Hassaan, Muhammad; Anell, Ingrid; Nystuen, Johan Petter; Faleide, Jan Inge & Midtkandal, Ivar (2023). Alluvial development during climate fluctuations depicted with spectral decomposition of the Middle Triassic to Lower Jurassic post-rift succession in the Horda Platform (Norway) and the impact on reservoir properties. Basin Research. ISSN 0950-091X. 35(6), p. 2301–2327. doi: 10.1111/bre.12799. Full text in Research Archive Show summary

  Abstract For the first time, this study presents interpretations of alluvial fans in spectral decomposition RGB Blends, analysed in seismic time slices from the Middle Triassic to Lower Jurassic stratigraphical interval of the Horda Platform (northern North Sea). The time slices record a shifting alluvial fan front, fluvial variability, uplift and erosion and reveals depositional elements that may set the common conception of the geological development of this area during the Early–Middle Mesozoic up for discussion. Results show that the Upper Triassic Lunde Formation in the eastern margin of the Horda Platform was characterized by the deposition of coalesced alluvial fans. A variable extent of the fan front through the Upper Triassic is linked to interplaying allogenic factors: uplifted source areas in the aftermath of Early–Middle Triassic rifting determined sediment availability; climate transitioning from arid to semi‐humid, with increasingly fluctuating precipitation, controlled sedimentation, and run‐off; provenance dictated bulk sedimentology and affected prevailing alluvial processes. An overall retreat of the fan system through the Late Triassic coincided with a significant change in landscape characteristics at the transition into the overlying Statfjord Group. Uplift and initial tilting of the Horda Platform caused landscape degradation and the formation of plateaus and incised valleys, contemporaneous with increased humidity and marine transgression, forming estuaries. The shift in depositional style has implications for reservoir properties, creating complexity and heterogeneity in terms of facies distribution and connectivity, which may benefit potential CO 2 storage. Upper Triassic alluvial fan development in the Horda Platform (northern North Sea) depicted through spectral decomposition of seismic time slices Enhanced level of seismic stratigraphic interpretation with RGB blending Impact of allogenic factors on alluvial depositional development Implications of alluvial variability on reservoir properties

• Torgersen, Espen; Gabrielsen, Roy Helge; Ganerød, Morgan; Lelij, Roelant van der; Schönenberger, Jasmin & Nystuen, Johan Petter [Show all 7 contributors for this article] (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), p. 2110–2131. doi: 10.1017/S0016756822000966. Full text in Research Archive Show summary

  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.

• Würtzen, Camilla Louise; Osmond, Johnathon; Faleide, Jan Inge; Nystuen, Johan Petter; Anell, Ingrid & Midtkandal, Ivar (2021). Syn- to post-rift alluvial basin fill: seismic stratigraphic analysis of Permian-Triassic deposition in the Horda Platform, Norway. Basin Research. ISSN 0950-091X. doi: 10.1111/bre.12644. Full text in Research Archive
• Kumpulainen, R.A.; Hamilton, M.A.; Söderlund, U. & Nystuen, Johan Petter (2021). U-Pb baddeleyite age for the Ottfjället Dyke Swarm, central Scandinavian Caledonides: new constraints on Ediacaran opening of the Iapetus Ocean and glaciations on Baltica. GFF. ISSN 1103-5897. 143(1), p. 40–54. doi: 10.1080/11035897.2021.1888314. Full text in Research Archive Show summary

  The Ottfjället Dyke Swarm (ODS) is a prominent component of the Ediacaran mafic magmatism associated with opening of the Iapetus ocean, and hosted in the Särv Nappe, Middle Allochthon of the Scandinavian Caledonides. A U-Pb baddeleyite age of 596.3 ± 1.5 Ma for a thick, well preserved, plagioclase-phyric dolerite dyke in Härjedalen, Sweden, dates emplacement of the swarm. The age represents a robust, inheritance-free reference age for variably deformed and metamorphosed tholeiitic dykes in sandstone-dominated sequences of the lower part of the Middle Allochthon, representing the proximal, rifted Baltoscandian margin preceding the opening of Iapetus. The new age is within the narrow time span between 610 and 595 Ma defined by the most reliable age estimates for mafic dykes in structurally higher nappes (upper part of Middle Allochthon), representing the distal margin during the opening of Iapetus. The Ottfjället Dyke Swarm cuts the Tossåsfjället Group succession, which includes sabkha-related carbonate platform and diamictite couples, one of several correlated Neoproterozoic glaciogenic successions in Scandinavia. The intrusion age of ca. 596 Ma therefore sets a minimum age for the glaciogenic successions. It implies that Neoproterozoic glaciations in Scandinavia predate the ca. 580 Ma Gaskiers glaciation event and are probably part of the ca. 635 Ma Marinoan “Snowball-Earth”-type glaciation.

• Lorentzen, Sanne; Braut, Tonje Irene; Augustsson, Carita; Nystuen, Johan Petter; Jahren, Jens & Schovsbo, Niels H. (2020). Provenance of lower Cambrian quartz arenite on southwestern Baltica: weathering versus recycling. Journal of Sedimentary Research. ISSN 1527-1404. 90(5), p. 493–512. doi: 10.2110/JSR.2020.20. Full text in Research Archive
• Midtkandal, Ivar; Faleide, Jan Inge; Faleide, Thea Sveva; Serck, Christopher Sæbø; Planke, Sverre & Corseri, Romain [Show all 8 contributors for this article] (2019). Lower Cretaceous Barents Sea strata: epicontinental basin configuration, timing, correlation and depositional dynamics. Geological Magazine. ISSN 0016-7568. doi: 10.1017/S0016756819000918. Full text in Research Archive
• Stange, Kurt Martin; Midtkandal, Ivar; Nystuen, Johan Petter; Murray, Andrew; Sohbati, Reza & Thomson, Warren [Show all 8 contributors for this article] (2019). Erosive Response of Non-Glaciated Pyrenean Headwater Catchments to the Last Major Climate Transition and Establishing Interglacial Conditions. Quaternary. 2(17). doi: 10.3390/quat2020017. Full text in Research Archive Show summary

  Non-glaciated mountain headwater catchments feature high-resolution geomorphic archives, which provide important insight into erosive processes and sediment dynamics in mountain ranges. As such the Valle de la Fueva catchments in the southern Pyrenees present high-lying talus remnants, extensive denudation surfaces (pediments), deeply incised tributary ravines, and low-lying fluvial-cut terraces. Based on geomorphic analyses and absolute dating using terrestrial cosmogenic nuclides and optically stimulated luminescence, a (late stage) catchment erosion model for the Valle de la Fueva was elaborated and indicates successive development stages of (i) lasting pedimentation under cold-climate conditions during Marine Isotope Stages 4–2, (ii) rapid fluvial dissection, sediment remobilization and downcutting of ravines in response to the last major climate transition and establishing interglacial conditions, and (iii) late stage fluvial incision after 3–4 ka due to regionally increased flood magnitudes, and/or intensification of agriculture and forest management. Valle de la Fueva headwater catchment analysis indicated that the styles and magnitudes of basin surface processes were directly correlated with the amplitude and nature of paleoclimatic changes, modified by the interplay of environmental parameters. In contrast to large-scale fluvial systems, mountain headwater catchments seemed to be less afflicted with temporal and spatial averaging biases. They are thus useful targets for investigating direct climate change effects, surface process coupling, and non-linear response mechanisms in Quaternary fluvial systems.

• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge & Serck, Christopher Sæbø [Show all 7 contributors for this article] (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), p. 1–20. doi: 10.17850/njg99-3-7. Full text in Research Archive Show summary

  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.

• 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. Full text in Research Archive Show summary

  Two nested clinoform set types of different scales and steepness are mapped and analysed from high‐resolution seismic data. Restoration of post‐depositional faulting reveals a persistent pattern of small‐scale, high‐angle clinoforms contained within platform‐scale, low‐angle clinothems, showing a combined overall progradational depositional system. The large clinoforms lack a well‐defined platform edge, and show a gradual increase in dip from topset to foreset. A consistent recurring stratal pattern is evident from the architecture, and is considered a result of interplay between relative sea‐level change and autocyclic switching of sediment delivery focal points that brought sediment to the platform edge. This un‐interrupted succession records how intra‐shelf platforms prograde. Quantitative clinoform analysis may assist in determining the most influential depositional factors. Post‐depositional uplift and erosion requires restoration with re‐burial to maximum burial depth. Backstripping, decompaction and isostatic correction was performed assuming a range of lithologic compositions, as no wells test the lithology. Nearby wells penetrate strata basinward of the clinoforms, proving mudstone content above 50%, which in turn guide restoration values. Typical restored platform heights are 250–300 m, with correspondingly sized platform‐scale clinoform heights. Typical large‐scale clinoform foreset dip values are 1.3°–2.4°. Small‐scale clinothems are typically 100 m thick, with restored foreset dip angles at 4.4° ‐ > 10°. The results suggest that intrashelf platform growth occurs in pulses interrupted by draping of strata over its clinoform profile. The resultant architecture comprises small‐scale clinoforms nested within platform‐scale clinothems.

• Lorentzen, Sanne; Augustsson, Carita; Jahren, Jens; Nystuen, Johan Petter & Schovsbo, Niels H. (2019). Tectonic, sedimentary and diagenetic controls on sediment maturity of lower Cambrian quartz arenite from southwestern Baltica. Basin Research. ISSN 0950-091X. 31(6), p. 1098–1120. doi: 10.1111/bre.12359. Full text in Research Archive
• Lorentzen, Sanne; Augustsson, Carita; Nystuen, Johan Petter; Berndt, Jasper; Jahren, Jens & Schovsbo, Niels H. (2018). Provenance and sedimentary processes controlling the formation of lower Cambrian quartz arenite along the southwestern margin of Baltica. Sedimentary Geology. ISSN 0037-0738. 375, p. 203–217. doi: 10.1016/j.sedgeo.2017.08.008. Full text in Research Archive
• Stange, Kurt Martin; Midtkandal, Ivar; Nystuen, Johan Petter; Kuss, Hans-Joachim & Spiegel, Cornelia (2018). Direct response of small non-glaciated headwater catchments to Late Quaternary climate change: The Valle de la Fueva, southern Pyrenees. Geomorphology. ISSN 0169-555X. 318, p. 187–202. doi: 10.1016/j.geomorph.2018.06.008. Full text in Research Archive
• Mangerud, Jan; Birks, Hilary H; Halvorsen, Lene Synnøve; Hughes, Anna L.C.; Nashoug, Ole & Nystuen, Johan Petter [Show all 9 contributors for this article] (2018). The timing of deglaciation and the sequence of pioneer vegetation at Ringsaker, eastern Norway – and an earthquake-triggered landslide. Norwegian Journal of Geology. ISSN 2387-5844. 98(3), p. 301–318. doi: 10.17850/njg98-3-03. Full text in Research Archive Show summary

  We describe a sediment sequence comprising a thick till covered by thin beds of lacustrine sediments containing pollen and plant macrofossils derived from pioneer vegetation. Four consistent radiocarbon dates on terrestrial plant remains from the lacustrine sediments yielded an age of 10,500 calibrated years BP (cal years BP). This is the first accurate and precise age obtained for the deglaciation of the Mjøsa region in eastern Norway. We estimate that the ice-margin retreat rate in this area was about 250 m per year. Light-demanding herbs and Hippophaë rhamnoides were the first to colonise locally. When soils matured, birch immigrated to the area forming the first forests at around 10,200 cal years BP. This was rapidly followed by pine and aspen and, later, by black alder at c. 9000 cal years BP. The lacustrine sediments are covered by 50 cm of peat and capped by a two-metre thick, coarse-grained, debris-flow deposit. The latter was surprising because of the very gentle slopes, four degrees in the failure area and less than three in the run-out and depositional area. We propose that the landslide, postdating the top of the peat that is dated to 6360 cal years BP, was triggered by a strong earthquake.

• 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, p. 269–289. doi: 10.1016/j.jsg.2017.06.006. Full text in Research Archive
• Sundal, Anja; Nystuen, Johan Petter; Rørvik, Kari-Lise; Dypvik, Henning & Aagaard, Per (2016). The Lower Jurassic Johansen Formation, northern North Sea – Depositional model and reservoir characterization for CO2 storage. Marine and Petroleum Geology. ISSN 0264-8172. 77, p. 1376–1401. doi: 10.1016/j.marpetgeo.2016.01.021. Full text in Research Archive
• Henstra, Gijs Allard; Grundvåg, Sten-Andreas; Johannessen, Erik P.; Kristensen, Thomas Berg; Midtkandal, Ivar & Nystuen, Johan Petter [Show all 10 contributors for this article] (2016). Depositional processes and stratigraphic architecture within a coarse-grained rift-margin turbidite system: The Wollaston Forland Group, east Greenland. Marine and Petroleum Geology. ISSN 0264-8172. 76, p. 187–209. doi: 10.1016/j.marpetgeo.2016.05.018. Full text in Research Archive
• 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), p. 777–791. doi: 10.1144/jgs2014-154. Full text in Research Archive
• Lamminen, Jarkko Tapani; Andersen, Tom & Nystuen, Johan Petter (2015). Provenance and rift basin architecture of the Neoproterozoic Hedmark Basin, South Norway inferred from U–Pb ages and Lu–Hf isotopes of conglomerate clasts and detrital zircons. Geological Magazine. ISSN 0016-7568. 152(1), p. 80–105. doi: 10.1017/S0016756814000144. Full text in Research Archive
• 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), p. 668–693. doi: 10.1017/S0016756814000570. Full text in Research Archive
• 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), p. 353–374. doi: 10.1144/jgs2013-056. Full text in Research Archive
• Nystuen, Johan Petter (2014). Den skandinaviske fjellkjeden - Skandene. Strid om navn på ung fjellkjede. Stein. ISSN 0802-9121. 2-2014(2), p. 4–14. Full text in Research Archive
• Ahokas, Juha Matti; Nystuen, Johan Petter & Martinius, Allard W. (2014). Depositional dynamics and sequence development in a tidally influenced marginal marine basin: Early Jurassic Neill Klinter Group, Jameson Land Basin, East Greenland. In Martinius, Allard W.; Ravnås, Rodmar; Howell, John A.; Steel, Ronald J. & Wonham, J. P. (Ed.), From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin. Wiley-Blackwell. ISSN 9781118920466. p. 291–338. doi: 10.1002/9781118920435.ch12. Full text in Research Archive
• Jarsve, Erlend Morisbak; Faleide, Jan Inge; Gabrielsen, Roy & Nystuen, Johan Petter (2014). Mesozoic and Cenozoic basin configurations in the North Sea. In Martinius, Allard W.; Ravnås, Rodmar; Howell, John A.; Steel, Ronald J. & Wonham, J. P. (Ed.), From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin. Wiley-Blackwell. ISSN 9781118920466. p. 417–452. doi: 10.1002/9781118920435.ch15. Full text in Research Archive
• Ahokas, Juha Matti; Nystuen, Johan Petter & Martinius, A.W. (2014). Stratigraphic signatures of punctuated rise in relative sea-level in an estuary-dominated heterolithic succession: Incised valley fills of the Toarcian Ostreaelv Formation, Neill Klinter Group (Jameson Land, East Greenland). Marine and Petroleum Geology. ISSN 0264-8172. 50, p. 103–129. doi: 10.1016/j.marpetgeo.2013.11.001. Full text in Research Archive
• Nystuen, Johan Petter; Mørk, Atle; Muller, Reidar & Nøttvedt, Arvid (2013). Fra ørken til elveslette - fra land til hav. Trias; 252-201 millioner år. In Ramberg, Ivar B.; Bryhni, Inge; Nøttvedt, Arvid & Rangnes, Kristin (Ed.), Landet blir til. Norges geologi. Norsk Geologisk Forening. ISSN 9788292394830. p. 332–357. Full text in Research Archive
• Lamminen, Jarkko Tapani; Andersen, Tom & Nystuen, Johan Petter (2011). The Rosten Formation, South Norwegian Caledonides: evidence for an early Sveconorwegian magmatic province at the Baltoscandian margin. Norsk Geologisk Tidsskrift. ISSN 0029-196X. 91(4), p. 229–237. Full text in Research Archive
• Lamminen, Jarkko Tapani; Andersen, Tom & Nystuen, Johan Petter (2011). Zircon U-Pb ages and Lu-Hf isotopes from basement rocks associated with Neoproterozoic sedimentary successions in the Sparagmite Region and adjacent areas, South Norway: the crustal architecture of western Baltica. Norsk Geologisk Tidsskrift. ISSN 0029-196X. 91(1-2), p. 35–55. Full text in Research Archive
• Glørstad-Clark, Evy; Birkeland, E. P.; Nystuen, Johan Petter; Faleide, Jan Inge & Midtkandal, Ivar (2011). Triassic platform-margin deltas in the western Barents Sea. Marine and Petroleum Geology. ISSN 0264-8172. 28(7), p. 1294–1314. doi: 10.1016/j.marpetgeo.2011.03.006. Full text in Research Archive
• Breien, Hedda; Blasio, Fabio V De; Elverhøi, Anders; Nystuen, Johan Petter & Harbitz, Carl Bonnevie (2010). Transport mechanisms of sand in deep-marine environments-insights based on laboratory experiments. Journal of Sedimentary Research. ISSN 1527-1404. 80(11), p. 975–990. doi: 10.2110/jsr.2010.079. Full text in Research Archive
• Gabrielsen, Roy Helge; Faleide, Jan Inge; Pascal, Christophe; Braathen, Alvar; Nystuen, Johan Petter & Etzelmuller, Bernd [Show all 7 contributors for this article] (2010). Latest Caledonian to Present tectonomorphological development of southern Norway. Marine and Petroleum Geology. ISSN 0264-8172. 27(3), p. 709–723. doi: 10.1016/j.marpetgeo.2009.06.004. Full text in Research Archive Show summary

  The regional resultant stress field of the northeastern North Atlantic has shifted significantly throughout the Phanerozoic. In Fennoscandian parts of the Caledonian orogen, mountain building, which was characterized by NW-SE contraction (reference to present North), was followed by a collapse with transport both parallel and transverse to the mountain chain. The Late Palaeozoic – Mesozoic saw several stages of E-W to NW-SE extension, varying in time and position. Local episodes of inversion are traceable in some cases, particularly in connection with deep-seated and long-lived zones of weakness. The Cenozoic has to a larger degree been affected by compression, including folding and basin inversion. Again some of the more pronounced effects of local inversion are related to pre-existing fault systems. Neogene uplift of the western mountainous area in Scandinavia can be unravelled by potential field study, AFT data and reflection seismic sections. Assuming that the region is close to isostatic equilibrium, the uplifted areas must be supported at depth by substantial volumes of low-density material within the crust or the mantle, close to the crust/mantle interface or close to the lithosphere/asthenosphere interfaces. A series of NW-SE-oriented cross-sections, representing successive stages of development from the late Caledonian to Present were prepared and used to analyse the tectonomorphological development as related to the shifting stress configurations. Three stages are inferred: Stage 1; Devonian – late Permian denudation of the Caledonian mountain chain: During the latest stage of closing of the Iapetus Ocean in early to mid Devonian times, the Caledonian mountain chain reached its maximum elevation of perhaps as much as 8–9 km. Including the foreland basins to the east, the average topographic gradient of the eastern flank may have been in the order of 1,3°. The denudation of the Caledonian mountains continued into the Permian and by the end of the Permian, the mountain system was more or less obliterated with a gradient of the eastern flank probably continued to fall to less than 0,1°. Stage 2; Triassic – late Cretaceous; Tectono-thermal uplift of central south Norway. Uplift of central south Norway was rejuvenated in Triassic times and continued throughout the Jurassic and early Cretaceous. The gradient of the eastern flank increased to a maximum of approximately 0,15° and master structural elements like the Lærdal-Gjende-Olestøl Fault Complex again played important roles in the development. Stage 3; Tertiary – Present; Renewed tectono-thermal activity and post-glacial rebound. A second phase of post-Caledonian tectono-thermal uplift of south central Norway started in Oligocene time, again increasing the gradient of the eastern flank of south Norway (around 0,2°).

• Schomacker, Edwin Robert; Kjemperud, Audun; Nystuen, Johan Petter & Jahren, Jens (2010). Recognition and significance of sharp-based mouth bar deposits in the Eocene Green River Formation, Uinta Basin, Utah. Sedimentology. ISSN 0037-0746. 57(4), p. 1069–1087. doi: 10.1111/j.1365-3091.2009.01136.x. Full text in Research Archive
• Glørstad-Clark, Evy; Faleide, Jan Inge; Lundschien, Bjørn A. & Nystuen, Johan Petter (2010). Triassic seismic sequence stratigraphy and paleogeography of the western Barents Sea area. Marine and Petroleum Geology. ISSN 0264-8172. 27(7), p. 1448–1475. doi: 10.1016/j.marpetgeo.2010.02.008. Full text in Research Archive
• Mansurbeg, H; Caja, MA; Marfil, R; Morad, S; Remacha, E & Garcia, D [Show all 9 contributors for this article] (2009). DIAGENETIC EVOLUTION AND POROSITY DESTRUCTION OF TURBIDITIC HYBRID ARENITES AND SILICICLASTIC SANDSTONES OF FORELAND BASINS: EVIDENCE FROM THE EOCENE HECHO GROUP, PYRENEES, SPAIN. Journal of Sedimentary Research. ISSN 1527-1404. 79(9-10), p. 711–735. doi: 10.2110/jsr.2009.060. Full text in Research Archive
• Midtkandal, Ivar & Nystuen, Johan Petter (2009). Depositional architecture of a low-gradient ramp shelf in an epicontinental sea: the lower Cretaceous of Svalbard. Basin Research. ISSN 0950-091X. 21(5), p. 655–675. doi: 10.1111/j.1365-2117.2009.00399.x. Full text in Research Archive
• Mansurbeg, H; Morad, S; Salem, A; Marfil, R; El-ghali, MAK & Nystuen, Johan Petter [Show all 10 contributors for this article] (2008). Diagenesis and reservoir quality evolution of palaeocene deep-water, marine sandstones, the Shetland-Faroes Basin, British continental shelf. Marine and Petroleum Geology. ISSN 0264-8172. 25, p. 514–543. doi: 10.1016/j.marpetgeo.2007.07.012. Full text in Research Archive
• Nystuen, Johan Petter; Andresen, Arild; Kumpulainen, Risto & Siedlecka, Anna (2008). Neoproterozoic basin evolution in Fennoscandia, East Greenland and Svalbard. Episodes. ISSN 0705-3797. 31(1), p. 35–43. Full text in Research Archive
• Fjellanger, Jakob & Nystuen, Johan Petter (2007). Diagenesis and weathering of quartzite at the palaeic surface on the Varanger Peninsula, northern Norway. Norsk Geologisk Tidsskrift. ISSN 0029-196X. 87, p. 239–251. Full text in Research Archive

View all works in NVA

• Kumpulainen, Risto A.; Hamilton, Mike A.; Söderlund, Ulf & Nystuen, Johan Petter (2023). U-Pb baddeleyite age for the Ottfjället Dyke Swarm, central Scandinavian Caledonides: new constraints on the timing of the Baltoscandian Dyke Swarm, opening of the Iapetus Ocean and Neoproterozoic glaciation of Baltica–comment on the inferred age of Neoproterozoic glaciation on Baltica–a reply. GFF. ISSN 1103-5897. doi: 10.1080/11035897.2023.2233569. Full text in Research Archive
• 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. Full text in Research Archive
• Midtkandal, Ivar; Holbrook, John; Faleide, Jan Inge; Myers, Cody; Yperen, Anna Elisabeth van & Shephard, Grace [Show all 7 contributors for this article] (2020). Testing arctic tectonic plate models with Cretaceous sediment source to sink budgets. Full text in Research Archive
• Würtzen, Camilla Louise; Nystuen, Johan Petter; Müller, Reidar; Faleide, J. I. & Midtkandal, Ivar (2020). Basin Fill Dynamics ​of the Triassic Alluvial Succession on the Horda Platform, Northern North Sea. Full text in Research Archive Show summary

  The Triassic continental succession west of the Øygarden Fault Complex in the northern North Sea is studied using 2D and 3D seismic lines integrated with well pattern analysis to discern the basin fill history and structural development of the area. The Øygarden Fault Complex is located within the N-S trending Horda Platform east of the deeply faulted Viking Graben. A series of large west-dipping faults bounding east-dipping half grabens characterize the Horda Platform area. The focus area is within a rotated fault block between the basement-bounding Øygarden Fault in the east and the Vette Fault in the west. The Triassic fill forms a 1300 m eastward thickening unit, commonly regarded as part of the Late Triassic post-rift stage. A wedging of some intervals is however indicative of active faulting during deposition. Previous studies have subdivided the strata in the Tampen Spur area into a late Permian-early Scythian syn-rift basin fill and three post-rift phases; 1: Late Scythian to Ladinian, 2: Carnian to Norian, 3: Norian to Rhaetian, defined by bounding unconformities and depositional patterns. This study subdivides the Øygarden area succession into seismic facies where reflection patterns indicate depositional characteristics. Reflection pattern analyses reveal depositional features such as channels, hangingwall fans, and footwall fans. A shift in facies trend between mud and sand rich intervals indicates variance in subsidence rate and sedimentation supply related to tectonic displacement rate and climate. The climate changed from arid to semi-humid in the Latest Triassic according to studies from Tampen Spur: (1) a shift in palaeosol types, (2) increase in carbonate material, (3) seasonality indicated by isotope analysis, (4) absence of anhydrite, (5) an increase in abundance and thickness of the mud-dominated intervals related to an increase in pluvial lacustrine conditions, (6) a change in palaeolatitude, and (7) increased fluvial channel stability indicating increasing sinuosity. Humid climate results in denser vegetation, which strengthens levees and their channels. During increased runoff, the sediment yield increased, with correspondingly coarser grained material delivered to the basin. Models for sedimentation fill and stratal package geometries in rift systems can be applied to the Øygarden area. The analysis suggests a depositional system with N-S trending highs bounding narrow elongated basins. Alluvial fans prograded from the ranges into the basins. Changing subsidence rate and climatic variations controlled the magnitude and style of axial draining channels along with the dispersal and preservation of surrounding finer grained alluvial plain style deposits. Keywords. Triassic, Øygarden Fault Complex, northern north Sea, basin fill history, seismic facies, alluvial

• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge & Nystuen, Johan Petter [Show all 8 contributors for this article] (2019). High-resolution seismic imaging and modelling of structural and stratigraphical features in the SW Barents Sea. Full text in Research Archive Show summary

  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 [Show all 7 contributors for this article] (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. Full text in Research Archive
• Nystuen, Johan Petter (2018). How Old are the Mountains in South Norway. Full text in Research Archive
• Lorentzen, Sanne; Augustsson, Carita; Nystuen, Johan Petter; Jahren, Jens & Schovsbo, Niels H. (2018). Quartz cementation and diagenetic effects in sandstone – an analog study of Cambrian quartz arenite from Scandinavia. Full text in Research Archive
• Howell, John Anthony; Knarud, Ragnar; Naumann, Nicole; Buckley, Simon John; Keogh, K.J & Lervik, K.S. [Show all 7 contributors for this article] (2018). The SAFARI project - 30 years of reservoir analogue studies. Full text in Research Archive
• Lorentzen, Sanne; Augustsson, Carita; Berndt, Jasper; Nystuen, Johan Petter; Jahren, Jens & Schovsbo, Niels H. (2017). Provenance and sedimentary processes controlling the formation of Lower Cambrian quartz arenite on Baltica. Full text in Research Archive
• Baig, Irfan; Faleide, Jan Inge; Hjelstuen, Berit Oline Blihovde; Sejrup, Hans Petter; Nystuen, Johan Petter & Aagaard, Per [Show all 8 contributors for this article] (2017). Seismic mapping of Quaternary sediment distribution in the central and northern North Sea. Full text in Research Archive
• Lorentzen, Sanne; Augustsson, Carita; Jahren, Jens; Nystuen, Johan Petter; Berndt, Jasper & Schovsbo, Niels H. (2016). Transportation and diagenetic controls in the formation of Lower Cambrian quartz arenite on Baltica. Full text in Research Archive
• Lorentzen, Sanne; Augustsson, Carita; Jahren, Jens; Nystuen, Johan Petter & Schovsbo, Niels H. (2016). Quartz cementation and diagenetic controls in sandstone – an analog study of Cambrian quartz arenite from Baltica. Full text in Research Archive
• Gabrielsen, Roy Helge & Nystuen, Johan Petter (2016). Glacial striations from the Varangerian glaciation in South Norway. Full text in Research Archive
• Lorentzen, Sanne; Augustsson, Carita; Berndt, Jasper; Jahren, Jens; Nystuen, Johan Petter & Schovsbo, Niels H. (2016). Transportation controls in the formation of Lower Cambrian quartz arenite on Baltica. Full text in Research Archive
• Alexandropoulou, Nikolitsa; Andreassen, Karin; Winsborrow, Monica; Faleide, Jan Inge & Nystuen, Johan Petter (2015). Late Cenozoic evolution of the western Barents Sea- Svalbard continental margin. Case study: Upper Bjørnøya Fan, western Barents Sea margin. Full text in Research Archive
• Midtkandal, Ivar; Faleide, Jan Inge; Planke, Sverre; Myrsini, Dimitriou; Dahlberg, Maria E. & Myklebust, Reidun [Show all 8 contributors for this article] (2015). Source-to-sink Dynamics in the Early Cretaceous Boreal Basin; Progradational Lobes from a Missing Source. Full text in Research Archive
• Midtkandal, Ivar; Faleide, Jan Inge; Dimitriou, Myrsini; Dahlberg, Maria Evensen; Planke, Sverre & Nystuen, Johan Petter (2015). The Barents Sea and Svalbard's Lower Cretaceous strata - epicontinental platform sedimentation dynamics. Full text in Research Archive
• Lorentzen, S.; Augustsson, C.; Jahren, Jens & Nystuen, Johan Petter (2015). Quartz cementation and diagenetic Controls in sandstone - an analogue study of Cambrian quartz arenite, Mjøsa District, Norway. Full text in Research Archive
• Müller, Reidar; Kjemperud, Audun Vestheim; Adestål, Victoria; Schomacker, Edwin R. & Nystuen, Johan Petter (2015). Late Triassic - Early Jurassic climatic change, Northern North Sea region, driven by long-term plate tectonic movements and climatic variation. Full text in Research Archive
• Nystuen, Johan Petter (2015). Klima gjennom jordas historie. Full text in Research Archive
• Lorentzen, Sanne; Augustsson, Carita; Jahren, Jens & Nystuen, Johan Petter (2015). Quartz cementation and diagenetic controls in sandstone – an analog study of Cambrian quartz arenite, Mjøsa District, Norway. Full text in Research Archive
• Nystuen, Johan Petter (2015). Klima i prekambrium - snøballjord og tropisk varme. Full text in Research Archive
• Dahlberg, M.E.; Faleide, Jan Inge; Midtkandal, Ivar; Nystuen, Johan Petter & Blaich, Olav Antonio (2015). Upper Jurassic to Lower Cretaceous structural and sequence stratigraphical evolution of the Fingerdjupet Subbasin, in a regional context. Full text in Research Archive
• Franeck, Franziska; Sandbakken, Martin Madshus; Midtkandal, Ivar; Nakrem, Hans Arne & Nystuen, Johan Petter (2015). A multi-phased incised valley system of the upper Ordovician in the Oslo Region. Full text in Research Archive
• Nystuen, Johan Petter; Gabrielsen, Roy Helge & Jarsve, Erlend Morisbak (2015). Dynamic geomorphology in the Southern Scandinavian Mountain Chain as function of tectonic uplifts and climatic changes in Cenozoic. Full text in Research Archive
• Nystuen, Johan Petter (2014). Klimaendringer i prekambrium: fra tropisk varme til snøballjord! Full text in Research Archive
• Nystuen, Johan Petter (2014). Den skandinaviske fjellkjeden. Full text in Research Archive
• Nystuen, Johan Petter (2014). Den skandinaviske fjellkjeden. Full text in Research Archive
• Nystuen, Johan Petter (2014). Den skandinaviske fjellkjede. Full text in Research Archive
• Midtkandal, Ivar; Faleide, Jan Inge; Dahlberg, Maria E.; Dimitriou, Myrsini & Nystuen, Johan Petter (2014). The Lower Cretaceous strata in Svalbard and the Barents Sea; basin infill dynamics and palaeobathymetry. Full text in Research Archive
• Nystuen, Johan Petter; Gabrielsen, Roy Helge & Jarsve, Erlend Morisbak (2014). Palaeovalleys on a main paleic surface of the Scandes in Central and eastern South Norway. Full text in Research Archive
• Nystuen, Johan Petter; Kjemperud, Audun V.; Müller, Reidar; Adestål, Victoria & Schomacker, Edwin R. (2014). Late Triassic to Early Jurassic climatic change, Northern North Sea region: impact on alluvial architecture, palaeosols and clay mineralogy. In Martinius, Allard W.; Ravnås, Rodmar; Howell, John A.; Steel, Ronald J. & Wonham, J. P. (Ed.), From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin. Wiley-Blackwell. ISSN 9781118920466. p. 59–100. Full text in Research Archive
• 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. Full text in Research Archive
• Nystuen, Johan Petter (2014). The Scandinavian Mountain Chain. Full text in Research Archive
• Sundal, Anja; Hellevang, Helge; Miri, Rohaldin; Dypvik, Henning; Nystuen, Johan Petter & Per, Aagaard (2014). Variations in mineralization potential for CO2 related to sedimentary facies and burial Depth - a comparative study from the North Sea. Energy Procedia. Full text in Research Archive
• Garten, Andreas; Nakrem, Hans Arne; Nystuen, Johan Petter & Larsen, Bjørn Tore (2013). A shallow marine storm-dominated shelf: Sælabonn Formaton, Oslo Region (Lower Silurian). In Nakrem, Hans Arne & haukdal, gunn (Ed.), NGF Vinterkonferansen 2013. Oslo, 8-20. January, 2013. NGF Abstracts and Proceedings of the Geological Society of Norway 1 (2013). Norsk Geologisk Forening. ISSN 9788292394786. p. 40–41. Full text in Research Archive
• Bue, Edina Pozer; Andresen, Arild & Nystuen, Johan Petter (2013). Zircon provenence data from Triassic sediments on Bjørnøya, the Urd and Skuld formations:new constraints on depositional models in the Western Barents Sea. Full text in Research Archive
• Sundal, Anja; Miri, Rohaldin; Nystuen, Johan Petter; Dypvik, Henning & Aagaard, Per (2013). Geologic controls on CO2 injectivity and distribution in the Johansen Formation, northern North Sea. Full text in Research Archive
• Sundal, Anja; Miri, Rohaldin; Nystuen, Johan Petter; Dypvik, Henning & Aagaard, Per (2013). Modeling CO2 distribution in a heterogeneous sandstone reservoir: the Johansen Formation, northern North Sea. Full text in Research Archive
• Nystuen, Johan Petter (2013). Jorda skifter ansikt - Geologiske prosesser. In Ramberg, Ivar B.; Bryhni, Inge; Nøttvedt, Arvid & Rangnes, Kristin (Ed.), Landet blir til. Norges geologi. Norsk Geologisk Forening. ISSN 9788292394830. p. 20–61. Full text in Research Archive
• Nystuen, Johan Petter (2013). Den skandinaviske fjellkjeden og dets landformer: Når og hvordan ble de dannet? In Ramberg, Ivar B.; Bryhni, Inge; Nøttvedt, Arvid & Rangnes, Kristin (Ed.), Landet blir til. Norges geologi. Norsk Geologisk Forening. ISSN 9788292394830. p. 562–564. Full text in Research Archive
• Nystuen, Johan Petter (2013). Urtidskontinentet brytes opp - Seinprekambrium, fra urtid til oldtid; 850-541 millioner år. In Ramberg, Ivar B.; Bryhni, Inge; Nøttvedt, Arvid & Rangnes, Kristin (Ed.), Landet blir til. Norges geologi. Norsk Geologisk Forening. ISSN 9788292394830. p. 120–147. Full text in Research Archive
• Bue, Edina Pozer; Andresen, Arild; Nystuen, Johan Petter & Dypvik, Henning (2013). Tracking the progressive filling of the Barents Sea in the Mesozoic using zircon age data. Full text in Research Archive
• Sundal, Anja; Nystuen, Johan Petter; Dypvik, Henning; Miri, Rohaldin & Aagaard, Per (2012). Effects of geological heterogeneity on CO2 distribution and migration – A case study from the Johansen Formation, Norway. doi: 10.1016/j.egypro.2013.06.418. Full text in Research Archive Show summary

  In characterizing subsurface reservoirs for CO2 storage, the geological heterogeneity distribution is of importance with respect to the injectivity and migration paths. The object of this study is a saline aquifer of Jurassic age; the Johansen Formation of the Northern North Sea. Through scenario modeling the effect of site-typical geological heterogeneities of depositional origin have been tested. The existence of laterally continuous calcite cemented layers and draping mud layers of low permeability in association with flooding events, could compartmentalize the reservoir. This is not necessarily a disadvantage; however, as the sweep efficiency becomes higher when the plume is spread out, potentially increasing the effect of trapping mechanisms.

• Danielsen, Åshild Kvamme; Linge, Henriette Christell; Juliussen, Håvard & Nystuen, Johan Petter (2012). Once upon a time under the ice divide: provenance, transport and exposure history of glacial erratics at Rendalssølen (1755 m a.s.l.), southeastern Norway. Full text in Research Archive
• Faleide, Jan Inge; Clark, Steven S.; Glørstad-Clark, Evy; Gabrielsen, Roy H.; Nystuen, Johan Petter & Planke, Sverre (2011). Basin development and potential petroleum plays in he Central Barents Sea. NGF abstracts and proceedings. p. 23–24. Full text in Research Archive
• Breien, Hedda; Blasio, Fabio V De; Elverhøi, Anders; Nystuen, Johan Petter & Harbitz, Carl Bonnevie (2011). Transport mechanisms of sand in deep-marine environments-insights based on laboratory experiments - reply. Journal of Sedimentary Research. ISSN 1527-1404. 81(11-12), p. 842–843. doi: 10.2110/jsr.2011.68. Full text in Research Archive
• Sundal, Anja; Nystuen, Johan Petter; Dypvik, Henning & Aagaard, Per (2011). Testing the Injectivity of CO2 in a Subsurface Heterogenous Reservoir. Full text in Research Archive
• Gabrielsen, Roy Helge; Faleide, Jan Inge; Pascal, Christophe; Braathen, Alvar; Nystuen, Johan Petter & Etzelmuller, Bernd [Show all 7 contributors for this article] (2010). Reply to discussion of Gabrielsen et al. (2010) by Nielsen et al. (this volume): Latest Caledonian to present tectonomorphological development of southern Norway. Marine and Petroleum Geology. ISSN 0264-8172. 27(6), p. 1290–1295. doi: 10.1016/j.marpetgeo.2010.02.003. Full text in Research Archive
• Ahokas, Juha Matti; Martinius, Allard & Nystuen, Johan Petter (2010). Contemporaneous Early to earliest-Middle Jurassic paralic Sedimentary successions on Jameson Land, central East Greenland and Halten Terrace, offshore mid-Norway similarities and dissimilarities. Full text in Research Archive
• Nystuen, Johan Petter; Mørk, Atle; Adestål, Victoria; Bue, Edina Pozer; Glørstad-Clark, Evy & Hynne,, Ingrid [Show all 17 contributors for this article] (2010). Depositional systems and sequence development contrasted by climatic differences: the Triassic of the North Sea area, Mid-Norwegian shelf, the Barents Sea and Svalbard. Full text in Research Archive
• Glørstad-Clark, Evy; Faleide, Jan Inge; Nystuen, Johan Petter; Høy, Tore & Lundschien, Bjørn A. (2009). Triassic Seismic Sequence Stratigraphy and Paleogeography of the Norwegian Barents Sea. Full text in Research Archive
• Glørstad-Clark, Evy; Birkeland, E; Nystuen, Johan Petter & Faleide, Jan Inge (2009). Platform-Margin Deltas in the Early-Middle Triassic in the Norwegian Barents Sea. Full text in Research Archive
• Faleide, Jan Inge; Gabrielsen, Roy Helge & Nystuen, Johan Petter (2008). Timing of uplift of the Scandinavian mountains constrained by the offshore sedimentary record. 33rd International Geological Congress, Abstracts. CD-ROM. Full text in Research Archive
• Faleide, Jan Inge; Gabrielsen, Roy Helge & Nystuen, Johan Petter (2008). The Cenozoic sedimentary record offshore Norway - constraining vertical motions in time and space. Geophysical Research Abstracts. ISSN 1029-7006. 10. Full text in Research Archive
• Glørstad-Clark, Evy; Faleide, Jan Inge; Nystuen, Johan Petter & Leever, Karen Agneta (2008). Sequence stratigraphic framework for the Norwegian Barents Sea with a focus on the Triassic succession. Full text in Research Archive
• Lamminen, Jarkko Tapani; Nystuen, Johan Petter & Andersen, Tom (2008). U-Pb and Lu-Hf zircon data from the Rosten Formation, south Norway: Characterizing the western margin of Baltica before the breakup of Rodinia. Full text in Research Archive
• Kjemperud, Audun; Schomacker, Edwin Robert; Nystuen, Johan Petter; Jahren, Jens & Puigdefabregas, Cai (2008). Sequence stratigraphy of an alluvial Foreland basin succession: Escanilla Formation, Ainsa Basin, Spanish Pyrenees. Full text in Research Archive
• Schomacker, Edwin Robert; Kjemperud, Audun; Cross, T.A.; Nystuen, Johan Petter & Jahren, Jens (2008). Thickness variations and facies belt transitions in the Jurassic San Rafael Group and Morrison Formation, Southern Utah. Full text in Research Archive
• Kjemperud, Audun; Schomacker, Edwin Robert; Jahren, Jens & Nystuen, Johan Petter (2008). Distinction between sharp-based mouth bar and point bar deposits: The Eocene Green River Formation, Utah, USA. Full text in Research Archive
• Sundal, Anja; Per, Aagaard; Nystuen, Johan Petter & Dypvik, Henning (2015). Geological reservoir characterization for subsurface CO2 storage: Methodologies for evaluation of reservoir quality and effects of depositional heterogeneities. Akademika Publishing. Full text in Research Archive
• Nystuen, Johan Petter (2008). Neoproterozoic Moelv Tillite and the Hedmark Basin, the Mjøsa Area, South Norway. International Geological Congress. Full text in Research Archive

View all works in NVA