Sverre Planke

• Senger, Kim; Betlem, Peter; Birchall, Thomas; Gonzaga, Luis Jr.; Grundvåg, Sten-Andreas & Horota, Rafael Kenji [Vis alle 12 forfattere av denne artikkelen] (2022). Digitising Svalbard’s geology: the Festningen digital outcrop model. First Break. ISSN 0263-5046. 40, s. 47–55. doi: 10.3997/1365-2397.fb2022021.
• Blischke, Anett; Brandsdóttir, Bryndís; Stoker, Martyn S.; Gaina, Carmen; Erlendsson, Ögmundur & Tegner, Christian Maughan [Vis alle 12 forfattere av denne artikkelen] (2022). Seismic Volcanostratigraphy: The Key to Resolving the Jan Mayen Microcontinent and Iceland Plateau Rift Evolution. Geochemistry Geophysics Geosystems. ISSN 1525-2027. 23(4). doi: 10.1029/2021GC009948.
• Manton, Ben; Müller, Philipp; Mazzini, Adriano; Zastrozhnov, Dmitry; Jerram, Dougal Alexander & Millett, John M. [Vis alle 10 forfattere av denne artikkelen] (2022). Characterizing ancient and modern hydrothermal venting systems. Marine Geology. ISSN 0025-3227. 447:106781, s. 1–23. doi: 10.1016/j.margeo.2022.106781.
• Millett, John M.; Jerram, Dougal Alexander; Planke, Sverre; Mund, Bineet K.; Konar, Shubhodip & Sharda, Ruchika [Vis alle 8 forfattere av denne artikkelen] (2021). Volcanic facies architecture of early bimodal volcanism of the NW Deccan Traps: Volcanic reservoirs of the Raageshwari Deep Gas Field, Barmer Basin, India. Basin Research. ISSN 0950-091X. 33(6), s. 3348–3377. doi: 10.1111/bre.12605.
• Barrett, R.S.; Bellwald, Benjamin; Talling, P.J.; Micallef, A.; Gross, Felix & Berndt, Christian [Vis alle 9 forfattere av denne artikkelen] (2021). Does Retrogression Always Account for the Large Volume of Submarine Megaslides? Evidence to the Contrary From the Tampen Slide, Offshore Norway. Journal of Geophysical Research (JGR): Solid Earth. ISSN 2169-9313. 126(2). doi: 10.1029/2020JB020655. Fulltekst i vitenarkiv
• Sibik, Svetlana; Edmonds, Marie; Villemant, Benoit; Svensen, Henrik Hovland; Polozov, Alexander G. & Planke, Sverre (2021). Halogen Enrichment of Siberian Traps Magmas During Interaction With Evaporites. Frontiers in Earth Science. ISSN 2296-6463. 9. doi: 10.3389/feart.2021.741447. Fulltekst i vitenarkiv
• Gernigon, Laurent; Zastrozhnov, Dmitrii; Planke, Sverre; Manton, Ben; Abdelmalak, Mohamed Mansour & Olesen, Odleiv [Vis alle 9 forfattere av denne artikkelen] (2021). A digital compilation of structural and magmatic elements of the mid-Norwegian continental margin (Version 1.0). Norwegian Journal of Geology. ISSN 2387-5844. 101. doi: 10.17850/njg101-3-2. Fulltekst i vitenarkiv
• Corseri, Romain; Planke, Sverre; Faleide, Jan Inge; Senger, Kim; Gelius, Leiv-J. & Johansen, Ståle Emil (2021). Opportunistic magnetotelluric transects from CSEM surveys in the Barents Sea. Geophysical Journal International. ISSN 0956-540X. 227(3), s. 1832–1845. doi: 10.1093/gji/ggab312.
• Rodríguez-Tovar, F.J.; Dorador, J.; Zuchuat, Valentin; Planke, Sverre & Hammer, Øyvind (2021). Response of macrobenthic trace maker community to the end-Permian mass extinction in Central Spitsbergen, Svalbard. Palaeogeography, Palaeoclimatology, Palaeoecology. ISSN 0031-0182. 581. doi: 10.1016/j.palaeo.2021.110637.
• Callegaro, Sara; Svensen, Henrik Hovland; Neumann, Else Ragnhild; Polozov, Alexander G.; Jerram, Dougal Alexander & Deegan, Frances M. [Vis alle 10 forfattere av denne artikkelen] (2021). Geochemistry of deep Tunguska Basin sills, Siberian Traps: correlations and potential implications for the end-Permian environmental crisis. Contributions to Mineralogy and Petrology. ISSN 0010-7999. 176. doi: 10.1007/s00410-021-01807-3. Fulltekst i vitenarkiv
• Millett, John M.; Jerram, Dougal Alexander; Manton, Ben; Planke, Sverre; Ablard, Peter & Wallis, Dirk [Vis alle 10 forfattere av denne artikkelen] (2021). The Rosebank Field, NE Atlantic: Volcanic characterisation of an inter-lava hydrocarbon discovery. Basin Research. ISSN 0950-091X. 33(6), s. 2883–2913. doi: 10.1111/bre.12585.
• Faleide, Thea Sveva; Braathen, Alvar; Lecomte, Isabelle Christine; Mulrooney, Mark Joseph; Midtkandal, Ivar & Bugge, Aina J. [Vis alle 7 forfattere av denne artikkelen] (2021). Impacts of seismic resolution on fault interpretation: Insights from seismic modelling. Tectonophysics. ISSN 0040-1951. 816. doi: 10.1016/j.tecto.2021.229008. Fulltekst i vitenarkiv
• Bastos, Lucas Pinto Heckert; Rodrigues, René; Pereira, Egberto; Bergamaschi, Sergio; Alferes, Carmen Lucia Ferreira & Augland, Lars Eivind [Vis alle 9 forfattere av denne artikkelen] (2021). The birth and demise of the vast epicontinental Permian Irati-Whitehill sea: Evidence from organic geochemistry, geochronology, and paleogeography. Palaeogeography, Palaeoclimatology, Palaeoecology. ISSN 0031-0182. 562. doi: 10.1016/j.palaeo.2020.110103.
• Batchelor, Christine L.; Bellwald, Benjamin; Planke, Sverre; Ottesen, Dag; Henriksen, Sverre & Myklebust, Reidun [Vis alle 8 forfattere av denne artikkelen] (2021). Glacial, fluvial and contour-current-derived sedimentation along the northern North Sea margin through the Quaternary. Earth and Planetary Science Letters. ISSN 0012-821X. 566. doi: 10.1016/j.epsl.2021.116966. Fulltekst i vitenarkiv
• Bellwald, Benjamin; Planke, Sverre; Polteau, Stephane; Lebedeva-Ivanova, Nina; Faleide, Jan Inge & Zengaffinen-Morris, Sunniva Margrethe [Vis alle 8 forfattere av denne artikkelen] (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. 67(263), s. 404–420. doi: 10.1017/jog.2020.115. Fulltekst i vitenarkiv
• Waage, Malin; Singhroha, Sunny; Bünz, Stefan; Planke, Sverre; Waghorn, Kate Alyse & Bellwald, Benjamin (2021). Feasibility of using the P-Cable high-resolution 3D seismic system in detecting and monitoring CO2 leakage. International Journal of Greenhouse Gas Control. ISSN 1750-5836. 106, s. 1–9. doi: 10.1016/j.ijggc.2020.103240. Fulltekst i vitenarkiv Vis sammendrag

  The P-Cable technology is an acquisition principle for high-resolution and ultra-high-resolution 3D seismic data. Many 3D seismic datasets have been acquired over the last decade, but the application in time-lapse studies for monitoring of CO2 storage is a new and intriguing topic. High-resolution 3D (HR3D) seismic has the potential to detect and monitor CO2 leakage at carbon capture and storage sites with higher accuracy at depths ∼0−2 km below the seafloor compared to more traditional conventional seismic time-lapse data. Here, we synthesize and evaluate research on detection of subsurface CO2 movement using the P-Cable system and address the comparative advantages and disadvantages of conventional and HR3D technologies for subsurface fluid migration monitoring. Studies on P-Cable 4D seismic data show good repeatability (NRMS, 10–40 %), indicating a future monitoring potential. Analysis of detection limits of CO2 data from a CO2 storage site show the ability to detect very small amounts of CO2 (1.3–10.6 t; 3.3–27.4 % gas saturation) in the shallow subsurface. These detection limits are ∼30−300 times smaller than the detection limits of conventional seismic data at similar depths. We conclude that the P-Cable acquisition system can be a valuable monitoring tool in detecting small leakages and can complement conventional seismic data monitoring of the deeper interval.

• Neumann, Else Ragnhild; Marsh, J.S.; Galerne, Christophe Yann; Polteau, Stephane; Svensen, Henrik & Planke, Sverre (2020). Co-existing low-Ti and high-Ti dolerites in two large dykes in the Gap Dyke swarm, southeastern Karoo Basin (South Africa). South African Journal of Geology. ISSN 1012-0750. 123(1), s. 19–34. doi: 10.25131/sajg.123.0003.
• Millett, John M.; Manton, Ben M.; Zastrozhnov, Dmitrii; Planke, Sverre; Maharjan, Dwarika & Bellwald, Benjamin [Vis alle 16 forfattere av denne artikkelen] (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.
• Walker, Faye; Schofield, Nick; Millett, John; Jolley, Dave; Holford, Simon & Planke, Sverre [Vis alle 8 forfattere av denne artikkelen] (2020). Inside the volcano: Three-dimensional magmatic architecture of a buried shield volcano. Geology. ISSN 0091-7613. doi: 10.1130/G47941.1. Fulltekst i vitenarkiv
• Svensen, Henrik; Hammer, Øyvind; Chevallier, Luc; Jerram, Dougal Alexander; Silkoset, Petter & Polteau, Stephane [Vis alle 7 forfattere av denne artikkelen] (2020). Understanding thermogenic degassing in large igneous provinces: Inferences from the geological and statistical characteristics of breccia pipes in the western parts of the Karoo Basin. I Adatte, Thierry; Bond, David P.G. & Keller, Gerta (Red.), Mass extinctions, volcanism, and impacts. Geological Society of America. ISSN 9780813725444. s. 67–84.
• Pierdominici, Simona; Millet, John M.; Kück, Jochem K. M.; Thomas, Donald; Jerram, Dougal Alexander & Planke, Sverre [Vis alle 9 forfattere av denne artikkelen] (2020). Stress Field Interactions Between Overlapping Shield Volcanoes: Borehole Breakout Evidence From the Island of Hawai'i, USA. Journal of Geophysical Research (JGR): Earth Surface. ISSN 2169-9003. 125(8). doi: 10.1029/2020JB019768. Fulltekst i vitenarkiv
• Schobben, Martin; Foster, William J.; Sleveland, Arve; Zuchuat, Valentin; Svensen, Henrik & Planke, Sverre [Vis alle 11 forfattere av denne artikkelen] (2020). A nutrient control on marine anoxia during the end-Permian mass extinction. Nature Geoscience. ISSN 1752-0894. 13, s. 640–646. doi: 10.1038/s41561-020-0622-1. Vis sammendrag

  Oxygen deprivation and hydrogen sulfide toxicity are considered potent kill mechanisms during the mass extinction just before the Permian–Triassic boundary (~251.9 million years ago). However, the mechanism that drove vast stretches of the ocean to an anoxic state is unclear. Here, we present palaeoredox and phosphorus speciation data for a marine bathymetric transect from Svalbard. This shows that, before the extinction, enhanced weathering driven by Siberian Traps volcanism increased the influx of phosphorus, thus enhancing marine primary productivity and oxygen depletion in proximal shelf settings. However, this non-sulfidic state efficiently sequestered phosphorus in the sediment in association with iron minerals, thus restricting the intensity and spatial extent of oxygen-depleted waters. The collapse of vegetation on land immediately before the marine extinction changed the relative weathering influx of iron and sulfate. The resulting transition to euxinic (sulfidic) conditions led to enhanced remobilization of bioavailable phosphorus, initiating a feedback that caused the spread of anoxic waters across large portions of the shelf. This reconciles a lag of >0.3 million years between the onset of enhanced weathering and the development of widespread, but geographically variable, ocean anoxia, with major implications for extinction selectivity.

• Zuchuat, Valentin; Sleveland, Arve; Twitchett, Richard; Svensen, Henrik; Turner, Holly & Augland, Lars Eivind [Vis alle 12 forfattere av denne artikkelen] (2020). A new high-resolution stratigraphic and palaeoenvironmental record spanning the End-Permian Mass Extinction and its aftermath in central Spitsbergen, Svalbard. Palaeogeography, Palaeoclimatology, Palaeoecology. ISSN 0031-0182. 554. doi: 10.1016/j.palaeo.2020.109732. Fulltekst i vitenarkiv Vis sammendrag

  Research on the Permian-Triassic boundary (PTB) along the northern margins of Pangaea (exposed today in the Arctic region) has been heavily reliant on field observations, where data resolution was consequently determined by outcrop condition and accessibility. Core drilling in central Spitsbergen allowed for a near-complete recovery of two ~90 m cores through the PTB. Analyses of the core and nearby outcrops include stratigraphic logging and sampling, XRF scanning, petrography, biostratigraphy, isotope geochemistry, and geochronology. The First Appearance Datum (FAD) of H. parvus in Svalbard places the base of the Triassic ca. 4 m above the base of the Vikinghøgda Formation, and ca. 2.50 m above the End-Permian Mass Extinction (EPME) and its associated sharp negative δ13C. The PTB therefore falls within the Reduviasporonites chalastus Assemblage Zone in Svalbard. Precise U-Pb TIMS dating of two zircon crystals in a tephra layer just above the first documented Hindeodus parvus in Svalbard gives an age of 252.13 ± 0.62 Ma. High-resolution palaeoenvironmental proxies, including Si/kcps (kilo counts per second), Zr/Rb, K/Ti, Fe/K, and V/Cr, indicate a transition towards a more arid climate in the earliest Triassic, contemporaneous with prolonged bottom-water dysoxic/anoxic conditions, following an increase in volcanic activity in the Late Permian. Statistical analysis of Zr/Rb, K/Ti and V/Cr elemental ratios suggests that the system was impacted by long-eccentricity (400 kyr) cyclicity. The δ13C excursion in organic carbon (δ13Corg) record signals a large negative carbon isotope excursion (CIE) associated with the mass extinction event, but also records a second, smaller negative CIE ca. 22 m above this interval. This younger δ13Corg excursion correlates to similar CIEs in the Dienerian (late Induan) records of other sections, notably in the Tethys Ocean, which have been interpreted as recording a small biotic crisis during the post-extinction recovery. Evidence of this negative CIE in Spitsbergen suggests that the Dienerian crisis may have been global in extent. The negative δ13Corg values are associated with evidence for dysoxia or anoxia in the core, and the occurrence of tephra layers in the same interval suggests a possible connection between the Dienerian crisis and a discrete episode of volcanic activity.

• 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
• Polteau, Stephane; Planke, Sverre; Zastrozhnov, Dmitrii; Abdelmalak, Mohamed Mansour; Lebedeva-Ivanova, Nina & Eckhoff Planke, Ellen [Vis alle 14 forfattere av denne artikkelen] (2020). Upper cretaceous-paleogene stratigraphy and development of the Mímir High, Vøring transform margin, Norwegian Sea. Marine and Petroleum Geology. ISSN 0264-8172. 122. doi: 10.1016/j.marpetgeo.2020.104717. Fulltekst i vitenarkiv Vis sammendrag

  Transform margins represent strike-slip type of plate boundaries that form during continental breakup and initial ocean opening. They are often characterized by margin-parallel highs with exposed pre- and syn-rift sequences. The Vøring Transform Margin, offshore mid-Norway, initiated in the earliest Eocene during the opening of the NE Atlantic. Here, 2D seismic reflection data reveal a transform margin high, the Mímir High. The western flank of this undrilled structure is a kilometer-high escarpment where seismic reflections of pre-breakup age are truncated at the seafloor. The aim of this study was to recover seabed rock samples from the outcropping or shallowly buried sedimentary sequences to provide a geological tie to the regional seismic framework, thereby constraining the basin history and tectono-stratigraphic development. Seabed samples were successfully collected from 14 gravity core and Selcore stations and 10 ROV (remotely operated vehicle) sites along a 750 m high sampling profile, recovering clay, shales, sandstones and glacial dropstones. Biostratigraphy results revealed that the ages of the sedimentary rocks follow the stratigraphic order predicted by the initial seismic interpretation, with Upper Cretaceous sediments at the base and lower Eocene sediments at the top. The integrated interpretation shows that the Mímir High area, including parts of the outer Vøring and Møre basins and the proto-Jan Mayen Microplate Complex, were characterized by the deposition of late Campanian to early Maastrichtian, near coastal and shale-dominated sequences with poor source rock qualities. The early Paleocene samples indicate deep marine conditions that abruptly ended by rapid uplift of the Mímir High in the earliest Eocene. Finally, a reworked Pliensbachian palynomorph assemblage in potential early Eocene strata indicate the presence of exposed Mesozoic sequences in the vicinity of the Mímir High. We argue that some of the lower Eocene sediments where deposited within a hypothetical drainage system sourced from Greenland (Traill Ø or Jameson Land) and/or from the Jan Mayen Ridge prior to continental separation, and not the result of recent ice-rafting.

• Bellwald, Benjamin; Planke, Sverre; Becker, Lukas & Myklebust, Reidun (2020). Meltwater sediment transport as the dominating process in mid-latitude trough mouth fan formation. Nature Communications. ISSN 2041-1723. 11. doi: 10.1038/s41467-020-18337-4. Fulltekst i vitenarkiv
• 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
• Zastrozhnov, Dmitry; Gernigon, Laurent; Gogin, Iakov; Planke, Sverre; Abdelmalak, Mohamed Mansour & Polteau, Stephane [Vis alle 9 forfattere av denne artikkelen] (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.
• Lebedeva-Ivanova, Nina; Polteau, Stephane; Zastrozhnov, Dmitrii; Planke, Sverre; Waage, Malin & Bünz, Stefan [Vis alle 10 forfattere av denne artikkelen] (2019). Meter-Scale 3D Seismic Data for High-Resolution Site Characterization, 81st EAGE Conference and Exhibition 2019. European Association of Geoscientists and Engineers (EAGE). ISSN 978-1-5108-9281-1. s. 1–2. doi: 10.3997/2214-4609.201901933.
• Greenfield, L.; Millett, John M; Howell, J.A.; Jerram, Dougal Alexander; Watton, Timothy J. & Healy, D [Vis alle 8 forfattere av denne artikkelen] (2019). The 3D facies architecture and petrophysical properties of hyaloclastite delta deposits: An integrated photogrammetry and petrophysical study from southern Iceland. Basin Research. ISSN 0950-091X. 32(5), s. 1081–1104. doi: 10.1111/bre.12415.
• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge & Serck, Christopher Sæbø [Vis alle 7 forfattere av denne artikkelen] (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.

• Augland, Lars Eivind; Ryabov, Viktor V.; Vernikovsky, Valery A.; Planke, Sverre; Polozov, Alexander & Callegaro, Sara [Vis alle 8 forfattere av denne artikkelen] (2019). The main pulse of the Siberian Traps expanded in size and composition. Scientific Reports. ISSN 2045-2322. 9. doi: 10.1038/s41598-019-54023-2. Fulltekst i vitenarkiv
• Berndt, Christian; Planke, Sverre; Teagle, Damon; Huismans, Ritske; Torsvik, Trond Helge & Frieling, Joost [Vis alle 12 forfattere av denne artikkelen] (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.

• Midtkandal, Ivar; Faleide, Jan Inge; Faleide, Thea Sveva; Serck, Christopher Sæbø; Planke, Sverre & Corseri, Romain [Vis alle 8 forfattere av denne artikkelen] (2019). Lower Cretaceous Barents Sea strata: epicontinental basin configuration, timing, correlation and depositional dynamics. Geological Magazine. ISSN 0016-7568. doi: 10.1017/S0016756819000918.
• Jerram, Dougal Alexander; Millett, John M; Kück, Jochem; Thomas, Donald; Planke, Sverre & Haskins, Eric [Vis alle 8 forfattere av denne artikkelen] (2019). Understanding volcanic facies in the subsurface: A combined core, wireline logging and image log data set from the PTA2 and KMA1 boreholes, Big Island, Hawaii. Scientific Drilling. ISSN 1816-8957. 25, s. 15–33. doi: 10.5194/sd-25-15-2019. Fulltekst i vitenarkiv
• 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
• Svensen, Henrik; Jerram, Dougal Alexander; Polozov, Alexander; Planke, Sverre; Neal, Clive R. & Augland, Lars Eivind [Vis alle 7 forfattere av denne artikkelen] (2019). Thinking about LIPs: A brief history of ideas in Large igneous province research. Tectonophysics. ISSN 0040-1951. 760, s. 229–251. doi: 10.1016/j.tecto.2018.12.008. Fulltekst i vitenarkiv
• Jones, Morgan Thomas; Percival, Lawrence; Stokke, Ella Wulfsberg; Frieling, Joost; Mather, Tasmin A. & Riber, Lars [Vis alle 11 forfattere av denne artikkelen] (2019). Mercury anomalies across the Palaeocene–Eocene Thermal Maximum. Climate of the Past. ISSN 1814-9324. 15(1), s. 217–236. doi: 10.5194/cp-15-217-2019. Fulltekst i vitenarkiv
• Kjøll, Hans Jørgen; Andersen, Torgeir Bjørge; Corfu, Fernando; Labrousse, Loic; Tegner, Christian & Abdelmalak, Mohamed Mansour [Vis alle 7 forfattere av denne artikkelen] (2019). Timing of break-up and thermal evolution of a pre-Caledonian Neoproterozoic exhumed magma-rich rifted margin. Tectonics. ISSN 0278-7407. 38(6), s. 1843–1862. doi: 10.1029/2018TC005375. Fulltekst i vitenarkiv Vis sammendrag

  During the terminal stages of Wilson cycles, remnants of magma-poor margins may be incorporated into the orogens, whereas the magma-rich margins often are lost in subduction due to low buoyancy. The understanding of magma-rich margins is therefore mostly based on drill holes and geophysical observations. In this contribution, we explore the temporal evolution and the ambient conditions of a magma-rich rifted margin preserved within the Scandinavian Caledonides. The Scandinavian Dike Complex was emplaced into a sedimentary basin during the initial break-up and opening of the Iapetus Ocean 615 to 590 million years ago. The dike complex constitutes 70-90% of the magma-rich, syn-rift basins and is locally well-preserved despite the complex Caledonian history. This contribution provides new observations about the geometry, relative timing, and development of the margin. Jadeite-in-clinopyroxene geothermobarometry, titanium-in-biotite geothermometry, and garnet isopleth modeling show that the ambient pressure and temperature conditions were similar for the entire dike complex at 0.25 to 0.45 GPa, with contact metamorphic temperatures up to c. 700°C. In the northernmost part of the study area U-Pb dating of magmatic zircon shows that partial melting of the sedimentary host-rock, at relatively shallow levels, occurred at 612 Ma. This shows that the crust was molten already 6 million years before the northernmost dike swarm was emplaced at 605.7 ± 1.8 Ma. We propose that the locally pervasive partial melting occurred due to high geothermal gradients and introduction of mafic melt in the lower crust. These processes significantly reduced the strength of the crust, eventually facilitating continental break-up.

• Bellwald, Benjamin; Planke, Sverre; Lebedeva-Ivanova, Nina; Piasecka, Emilia Daria & Andreassen, Karin (2019). High-resolution landform assemblage along a buried glacio-erosive surface in the SW Barents Sea revealed by P-Cable 3D seismic data. Geomorphology. ISSN 0169-555X. 332, s. 33–50. doi: 10.1016/j.geomorph.2019.01.019. Fulltekst i vitenarkiv Vis sammendrag

  The Quaternary sedimentary record in the Arctic captures a diverse and evolving range of landscapes reflecting cli-mate changes. Here we study the geological landform assemblage of the Upper Regional Unconformity (URU) in theSW Barents Sea. The aims are (i) to characterize buried geological landforms on a meter-scale resolution, (ii) to un-derstand their link with underlying structures, and (iii) to reconstruct paleo-ice-sheet dynamics and configurations.The data consist of a high-resolution three-dimensional (3D) P-Cable seismic cube with an extent of c. 200 km2andan inline separation of 6 m. Dominant frequencies of c. 150 Hz allow to image landforms at URU with a vertical res-olution of 1–5 m and a horizontal resolution of 3–6 m. We conduct detailed horizon-picking and seismic attributeanalysis of the buried URU horizon. We identified four sets of mega-scale glacial lineations, and shear band ridgeslocated to the west of a shear margin moraine. Other characteristic features include hill-hole pairs, transverse ridges,rhombohedral ridges and depressions, iceberg ploughmarks and pockmarks. Polygonal faults below URU anddeeper faults have a strong effect on the location of structures observed on URU. Bedrock packages deformeddown to 30 m below URU and up to 5 m-high transverse ridges at URU are imprints of glacio-tectonic activity.Deformed strata below URU indicate normal faulting superimposed by glaciotectonic deformation. The four setsof mega-scale glacial lineations indicate four streaming events with thawed glacial beds, with shear band ridgesforming in the shearing zone during one of these streaming events. Hill-hole pairs and rhombohedral ridges arefrozen-bed features which indicate a polythermal regime at the base of the Barents Sea Ice Sheet during multiplestreaming phases. This study therefore shows that paleo-ice streams have been temporarily frozen to the groundin the SW Barents Sea, and that landforms evidencing this freezing are associated with underlying faults.

• Tegner, Christian; Andersen, Torgeir Bjørge; Kjøll, Hans Jørgen; Brown, Eric L.; Hagen-Peter, Graham & Corfu, Fernando [Vis alle 8 forfattere av denne artikkelen] (2019). A mantle plume origin for the Scandinavian Dyke Complex: a "piercing point" for 615 Ma plate reconstruction of Baltica? Geochemistry Geophysics Geosystems. ISSN 1525-2027. 20(2), s. 1075–1094. doi: 10.1029/2018GC007941. Fulltekst i vitenarkiv
• Heimdal, Thea Hatlen; Callegaro, Sara; Svensen, Henrik; Jones, Morgan Thomas; Pereira, Egberto & Planke, Sverre (2019). Evidence for magma–evaporite interactions during the emplacement of the Central Atlantic Magmatic Province (CAMP) in Brazil. Earth and Planetary Science Letters. ISSN 0012-821X. 506, s. 476–492. doi: 10.1016/j.epsl.2018.11.018.
• Polteau, S.; Lebedeva-Ivanova, Nina; Bellwald, Benjamin; Planke, Sverre; Zastrozhnov, Dmitry & Vanneste, Maarten [Vis alle 12 forfattere av denne artikkelen] (2018). High-Resolution 3D Site Characterization. I NN, NN (Red.), 3rd Applied Shallow Marine Geophysics Conference, Near Surface Geoscience Conference & Exhibition 2018. European Association of Geoscientists and Engineers (EAGE). ISSN 9789462822641. doi: 10.3997/2214-4609.201802675.
• Galland, Olivier; Bertelsen, Håvard Svanes; Eide, Christian Haug; Guldstrand, Frank Bo Buster; Haug, Øystein Thorden & Leanza, Hector Armando [Vis alle 14 forfattere av denne artikkelen] (2018). Storage and Transport of Magma in the Layered Crust—Formation of Sills and Related Flat-Lying Intrusions. I Burchardt, Steffi (Red.), Volcanic and Igneous Plumbing Systems - Understanding Magma Transport, Storage, and Evolution in the Earth's Crust. Elsevier. ISSN 978-0-12-809749-6. s. 113–138. doi: 10.1016/B978-0-12-809749-6.00005-4.
• Millett, J.M.; Planke, Sverre; Kastner, Felix; Blischke, A; Hersir, Gylfi Pall & Halldorsdottir, Sæunn [Vis alle 17 forfattere av denne artikkelen] (2018). Sub-surface geology and velocity structure of the Krafla high temperature geothermal field, Iceland: Integrated ditch cuttings, wireline and zero offset vertical seismic profile analysis. Journal of Volcanology and Geothermal Research. ISSN 0377-0273. 391. doi: 10.1016/j.jvolgeores.2018.03.024.
• Lebedeva-Ivanova, Nina; Polteau, Stephane; Bellwald, Benjamin; Planke, Sverre; Berndt, Christian & Stokke, Henrik Henriksen (2018). Toward one-meter resolution in 3D seismic. The Leading Edge. ISSN 1070-485X. 37(11), s. 818–828. doi: 10.1190/tle37110818.1.
• Bellwald, Benjamin & Planke, Sverre (2018). Shear margin moraine, mass transport deposits and soft beds revealed by high-resolution P-Cable three dimensional seismic data in the Hoop area, Barents Sea. Geological Society Special Publication. ISSN 0305-8719. 477(1), s. 537–547. doi: 10.1144/SP477.29.
• Planke, Sverre; Rabbel, Ole; Galland, Olivier; Millet, John; Manson, Ben & Jerram, Dougal Alexander [Vis alle 8 forfattere av denne artikkelen] (2018). Seismic imaging and petroleum implications of igneous intrusions in sedimentary basins constrained by outcrop analogues and seismic data from the Neuquén Basin and the NE Atlantic. I Vernengo, Luis; Atencio, Mario; Branca, Marcela; Corti, Eduardo; D'Biassi, Tomás; Dario Enrique, Jorge; García Torrejón, Maximiliano; Pianelli, Luis; Ricardi, Alberto; Soubiés, Daniel & Späth, Federico (Red.), 10 Congreso de Exploración y Desarrollo de Hidrocarburos - Simposio de Geofísica: La geofísica como vinculo entre el conocimiento de la tierra y la sociedad. Instituto Argentino del Petroleo y del Gas. ISSN 978-987-9139-92-9. s. 343–366.
• Svensen, Henrik; Frolov, Sergei; G., Akhmanov; Polozov, Alexander; Jerram, Dougal Alexander & Shiganova, O. [Vis alle 9 forfattere av denne artikkelen] (2018). Sills and gas generation in the Siberian Traps. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. ISSN 1364-503X. 376(2130). doi: 10.1098/rsta.2017.0080.
• Polteau, Stephane; Mazzini, Adriano; Hansen, Geir; Planke, Sverre; Jerram, Dougal Alexander & Millett, John [Vis alle 9 forfattere av denne artikkelen] (2018). The pre-breakup stratigraphy and petroleum system of the Southern Jan Mayen Ridge revealed by seafloor sampling. Tectonophysics. ISSN 0040-1951. 760, s. 152–164. doi: 10.1016/j.tecto.2018.04.016.
• Reiser, Fabienne; Schmelzbach, Cedric; Sollberger, David; Maurer, Hansruedi; Greenhalgh, Stewart & Planke, Sverre [Vis alle 11 forfattere av denne artikkelen] (2018). Imaging the high-temperature geothermal field at Krafla using vertical seismic profiling. Journal of Volcanology and Geothermal Research. ISSN 0377-0273. doi: 10.1016/j.jvolgeores.2018.10.019.
• Abdelmalak, Mohamed Mansour; Planke, Sverre; Polteau, Stephane; Hartz, Ebbe Hvidegård; Faleide, Jan Inge & Tegner, Christian [Vis alle 9 forfattere av denne artikkelen] (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.
• Corseri, Romain; Faleide, Thea Sveva; Faleide, Jan Inge; Midtkandal, Ivar; Serck, Christopher Sæbø & Trulsvik, Mikal [Vis alle 7 forfattere av denne artikkelen] (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
• Kastner, Felix; Giese, Rudiger; Planke, Sverre; Millett, John M & Flovenz, Olafur G (2018). Seismic imaging in the Krafla high-temperature geothermal field, NE Iceland, using zero- and far-offset vertical seismic profiling (VSP) data. Journal of Volcanology and Geothermal Research. ISSN 0377-0273. doi: 10.1016/j.jvolgeores.2018.02.016.
• Tasianas, Alexandros; Bünz, Stefan; Bellwald, Benjamin; Hammer, Øyvind; Planke, Sverre & Lebedeva-Ivanova, Nina [Vis alle 7 forfattere av denne artikkelen] (2018). High-resolution 3D seismic study of pockmarks and shallow fluid flow systems at the Snøhvit hydrocarbon field in the SW Barents Sea. Marine Geology. ISSN 0025-3227. 403, s. 247–261. doi: 10.1016/j.margeo.2018.06.012. Fulltekst i vitenarkiv
• Zastrozhnov, Dmitrii; Gernigon, Laurent; Gogin, I; Abdelmalak, Mohamed Mansour; Planke, Sverre & Faleide, Jan Inge [Vis alle 8 forfattere av denne artikkelen] (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.

Se alle arbeider i Cristin

• Machado Garcia, Aurora; Bellwald, Benjamin; Midtkandal, Ivar; Anell, Ingrid; Planke, Sverre & Sternai, Pietro [Vis alle 7 forfattere av denne artikkelen] (2021). Sedimentary Processes and Deposits of the Last Glaciation at the North Sea Fan, Offshore Norway. Vis sammendrag

  Understanding the sedimentary processes and resulting deposits along glaciated margins, that can be recorded in trough mouth fans (TMF), is crucial to increase knowledge about ice sheet dynamics. Their behavior influences Earth’s climate system and sea level variations, from regional to global scale, during relatively rapid timescales (up to millennia). This study uses high-quality 3D seismic reflection data of the uppermost North Sea Trough Mouth Fan to document the seismic stratigraphy, sedimentary processes and glacio-marine landforms shaped during the last glacial highstand (23-19 ka). The stratigraphy of the fan is characterized by thick (~400m) prograding sequences. Facies analyses and seismic geomorphology show three main depositional processes (contour-currents, gravity-driven flows and setting of plumes), mappable as seven seismic sub-units in the studied interval. Contour currents are responsible for the deposition of the lowermost two sub-units (U1 and U2), characterized by continuous reflections with increasing amplitude contrasts near the Tampen Slide escarpment. U1 is dominated by positive amplitudes with mostly tabular geometry. U2, identified in the northern part, is dominated by negative amplitudes with lenticular geometry and is synchronous with the glaciation onset. These sub-units are followed by a succession of relatively homogeneous facies interrupted by continuous high-frequency horizons that subdivide the succession into four sub-units (U3-6). These sub-units are characterized by channels, presumably generated by meltwater-fed turbidity flows, varying in width, varying in depth from 10 to 60m and with suggesting high-energy episodes that creates channels deeper than 100m. They are pervasive throughout the sequences and across the fan and are commonly isolated with low sinuosity. The uppermost sequence (U7) is dominated by deposition of the suspended load and ice-raft debris, characterized by parallel and slightly undulated continuous inner reflections, thinning out downslope. Along the shelf, multiple cross-cutting of iceberg scours and pits are observed. The succession with channels evidence that meltwater can play a major role in TMF sedimentation. These new insights about the smaller-scale processes within seismic resolution demonstrate the variability of active processes during a fast sedimentation period of the Weichselian Glaciation at the North Sea Trough Mouth Fan.

• B. Larsen, Rune; Sørensen, Bjørn Eske; Planke, Sverre; Tegner, Christian & Grant, Thomas (2021). Untold Tales From the Deep Dark Crust: Understanding the Lower Crustal Architecture of a LIP Forming System.
• Callegaro, Sara; Svensen, Henrik Hovland; Jerram, Dougal Alexander; Neumann, Else Ragnhild; Deegan, Frances M. & Polozov, Alexander [Vis alle 7 forfattere av denne artikkelen] (2021). Geochemistry of low-Ti Siberian Traps sills from the Tunguska Basin bears evidence of magma-crust interaction.
• Zuchuat, Valentin; Augland, Lars Eivind; Jones, Morgan Thomas; Twitchett, Richard; Rodríguez-Tovar, Francisco J. & Hammer, Øyvind [Vis alle 11 forfattere av denne artikkelen] (2021). Facies changes, volcanism, and mass extinction conundrum: the Permian-Triassic boundary across the Barents Sea Shelf. Vis sammendrag

  The most dramatic mass extinction the Earth has ever experienced occurred 252 million years ago, at the end of the Permian. It was likely triggered by the volcanic eruptions and magmatic intrusions associated with the Siberian Traps Large Igneous Province (LIP), leading to dramatic climatic changes, with consequences lasting well into the Early Triassic. Here, we present a summary of the findings from the study of several sedimentary successions distributed across the Barents Sea that spanned the End Permian Mass Extinction (EPME) and the Permian-Triassic boundary. The four studied successions included the renowned Festningen section in the outer part of Isfjorden, western Spitsbergen; the DD-1 core and the associated river section in Deltadalen, central Spitsbergen; a core drilled offshore Kvitøya in northern Svalbard, and a core drilled on the Horda Platform in the Barents Sea. Datasets of various research lines were collected from these sections including sedimentology, organic geochemistry, isotope, geochronology, XRF, mineralogy, ichnology, palaeontology, palynology and digital outcrop data. Historically, the Permian-Triassic boundary exposed today in Svalbard (and at various places across the High Arctic regions) was placed at the very prominent and abrupt facies change occurring between the siliceous mudstones or spiculites of the Kapp Starostin Formation, and the overlying soft, non-siliceous mudstones and siltstones of the Vardebukta and Vikinghøgda formations. The abruptness of this facies change, which also marks the demise of sponges, led to the belief that it represented a hiatus or a gap of several million years, with the uppermost Permian strata missing from the sedimentary record, while the mudstones of the Vardebukta and Vikinghøgda formations were definitely of Lower Triassic age, based on ammonoid biostratigraphy. Hindeodus parvus, the conodont that defines the base of the Triassic, was for the first time identified in Svalbard a few meters above the lithostratigraphic boundary, which is therefore of Upper Permian age. Additionally, our new data show that sedimentation was continuous across this lithostratigraphic boundary. This transition from the Kapp Starostin Formation to the Vardebukta and Vikinghøgda formations was accompanied by a major reorganisation/inversion of the basin(s), but its exact nature remains puzzling. Further, all measured sections record the EPME, which is associated with a 6-8 ‰ δ13CVPDB negative excursion, and measured between the lithostratigraphic and the Permian-Triassic boundaries. These negative isotopic excursions are found in close vicinity to several tephra layers that have been precisely dated at 252.13 ± 0.62 Ma, strongly suggesting a connection to the Siberian Traps LIP event. The mass extinction is also confirmed by the very rapid decreasing of trace fossil abundance and diversity, as anoxia spread across the water from proximal and shallow water to deeper settings. Geochemical and ichnological data indicate the occurrence of several anoxic pulses, intersected by very brief episodes of improved oxygenation levels. It took ca. 145 Kyr for life to recover after the extinction event, based on sedimentation rate calculations. Data also suggest that a shift towards more arid climatic conditions and increased eutrophication on land accompanied the EPME.

• Tegner, Christian; Andersen, Torgeir Bjørge; Kjøll, Hans Jørgen; Brown, Eric L.; Hagen-Peter, Graham & Corfu, Fernando [Vis alle 8 forfattere av denne artikkelen] (2021). A mantle plume origin for the Scandinavian Dyke Complex: a “piercing point” for 615 Ma plate reconstruction of Baltica? Vis sammendrag

  The origin of Large Igneous Provinces (LIPs) associated with continental breakup and the reconstruction of continents older than c. 320 million years (pre-Pangea) are contentious research problems. Here we study the petrology of a 615 - 590 Myr dolerite dyke complex that intruded rift-basins of the magma-rich margin of Baltica and now is exposed in the Scandinavian Caledonides. These dykes are part of the Central Iapetus Magmatic Province (CIMP), a LIP emplaced in Baltica and Laurentia during opening of the Caledonian Wilson Cycle. The >1000 km long dyke complex displays lateral geochemical zonation from enriched to depleted basaltic compositions from south to north. Geochemical modelling of major and trace elements shows these compositions are best explained by melting hot mantle 75-250°C above ambient mantle. Although the trace element modelling solutions are non-unique, the best explanation involves melting a laterally zoned mantle plume with enriched and depleted peridotite lithologies, similar to present-day Iceland and to the North Atlantic Igneous Province. The origin of CIMP appears to have involved several mantle plumes. This is best explained if rifting and breakup magmatism coincided with plume generation zones at the margins of a Large Low Shear-wave Velocity Province (LLSVP) at the core mantle boundary. If the LLSVPs are quasi-stationary back in time as suggested in recent geodynamic models, the CIMP provides a guide for reconstructing the paleogeography of Baltica and Laurentia 615 million years ago to the LLSVP now positioned under the Pacific Ocean. Our results provide a stimulus for using LIPs as piercing points for plate reconstructions.

• Faleide, Thea Sveva; Braathen, Alvar; Lecomte, Isabelle; Mulrooney, Mark Joseph; Midtkandal, Ivar & Bugge, A.J [Vis alle 7 forfattere av denne artikkelen] (2021). Exploring extensional fault interpretations from seismic reflection data of various resolution substantiated by seismic modelling.
• Planke, Sverre; Polozov, Alexander; Millett, John M; Jerram, Dougal Alexander; Zastrozhnov, Dmitrii & Svensen, Henrik (2020). Emergent and invasive magmatism of the Siberian Traps in a wet forest environment. NGF abstracts and proceedings.
• Millett, John M; Planke, Sverre; Jerram, Dougal Alexander; Hole, M.; Famelli, N & Jolley, D.W. (2020). Magmatism in wet sediment environ-ments: processes, deposits and implic-ations for prospective volcanic rifted margins. NGF abstracts and proceedings.
• Manton, Ben; Walker, Faye; Millett, John M; Zastrozhnov, Dmitrii; Polteau, Stephane & Jerram, Dougal Alexander [Vis alle 8 forfattere av denne artikkelen] (2020). The identification of inter-volcanic exploration targets in the NE Atlantic. NGF abstracts and proceedings.
• Jerram, Dougal Alexander; Sharp, Ian; Poulsen, Ragnar; Millett, John M; Planke, Sverre & Watton, Timothy J. [Vis alle 7 forfattere av denne artikkelen] (2020). Understanding the transitions from sub-aqueous to subaerial volcanic environments; inferences from exceptional exposures along the coast of Angola. NGF abstracts and proceedings.
• Planke, Sverre; Polozov, Alexander; Millett, John M & Jerram, Dougal Alexander (2020). The Siberian Traps magma emplacement dynamics links to environmental changes across the Permian-Triassic boundary in Svalbard. EGU General Assembly Conference Abstracts. s. 21766–21766.
• Avseth, Per Åge; Millett, John M; Jerram, Dougal Alexander; Planke, Sverre & Healy, Dave (2020). Rock Physics Analysis of Volcanic Lava Flows and Hyaloclastites. EAGE Conference and Exhibition. doi: 10.3997/2214-4609.202010499.
• Millett, John M; Jerram, Dougal Alexander & Planke, Sverre (2020). The Petrophysical Properties of Lava Flow Reservoirs . EAGE Conference and Exhibition. doi: 10.3997/2214-4609.202012052.
• Faleide, Thea Sveva; Braathen, Alvar; Lecomte, Isabelle; Mulrooney, Mark Joseph; Anell, Ingrid Margareta & Midtkandal, Ivar [Vis alle 7 forfattere av denne artikkelen] (2020). Testing seismic interpretation of faults by modelling; viable geometries versus seismic resolution in the subsurface. EAGE extended abstracts. 2020. doi: 10.3997/2214-4609.202011930.
• Planke, Sverre & Jones, Morgan Thomas (2020). Volcanism and climate change during the opening of the Atlantic. Vis sammendrag

  The early Cenozoic was a key period in Earth history. The opening of the northeast Atlantic ocean coincided with both the formation of the North Atlantic Igneous Province (NAIP) and the Paleocene–Eocene Thermal Maximum (PETM), suggesting that there may be a causal relationship between them. We present two drilling projects that will start next year on the Norwegian margin (IODP 396) and in northwest Denmark (ICDP Limfjorden) to address these exciting research questions.

• Jones, Morgan Thomas; Stokke, Ella Wulfsberg; Augland, Lars Eivind; Pogge von Strandmann, Philip A.E.; Liu, Emma J. & Mather, Tamsin [Vis alle 13 forfattere av denne artikkelen] (2020). Constraining North Atlantic Igneous Province (NAIP) activity during the late Paleocene and early Eocene.
• Faleide, Thea Sveva; Braathen, Alvar; Lecomte, Isabelle; Anell, Ingrid Margareta; Midtkandal, Ivar & Planke, Sverre (2020). Seismic modelling of faults; viable geometries vs seismic resolution in the subsurface. Vis sammendrag

  Resolution and illumination issues in seismic data curtails identification of fault geometries and fault-initiated rock damage when mapping subsurface faults. Seismic modelling can be utilized to bridge the gap in identifying what can be imaged with certainty in seismic data, with respect to the original geology, especially when also comparing to outcrop data. In this study, we explore how seismic modelling can distinguish between real structures versus seismic artefacts. 2(3)D Point-Spread-Function based convolution modelling is used in a sensitivity study. One input is detailed fault interpretations of high-resolution P-Cable data and comparable conventional 3D seismic data from the Hoop area in the Barents Sea. Another dataset comes from detailed fault geometries observed in outcrops, which were used to build geological models as input to the seismic modelling. In addition to the host-rock lithofacies, parameters of importance for the geological model building include overall fault geometry and the distribution of architectural elements (fault facies) within the fault zone. By varying fault input, lithofacies, a wide range of frequencies, and illumination, we analyse a variety of synthetic seismic images. Finally we compare our modelled outcomes with seismic data from the Hoop area. The scope of the workflow is to increase confidence in seismic interpretations and to identify limitations in the analysis of steep, normal faults in seismic data.

• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge & Nystuen, Johan Petter [Vis alle 8 forfattere av denne artikkelen] (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

• Jochmann, Malte Michel; Senger, Kim; Betlem, Peter; Smyrak-Sikora, Aleksandra; Elvevold, Synnøve & Myhre, Per Inge [Vis alle 12 forfattere av denne artikkelen] (2019). Svalbard Rock Vault 2020: let us safeguard Svalbard’s geoscientific heritage together.
• Planke, Sverre; Corseri, Romain; Polteau, Stephane; Faleide, Jan Inge; Midtkandal, Ivar & Faleide, Thea Sveva [Vis alle 9 forfattere av denne artikkelen] (2019). HALIP Implications for Early Cretaceous Sedimentation in the Barents Sea.
• Lebedeva-Ivanova, Nina; Polteau, Stephane; Zastrozhnov, Dmitry; Planke, Sverre; Waage, Malin & Bünz, Stefan [Vis alle 10 forfattere av denne artikkelen] (2019). Meter-Scale 3D Seismic Data for High-Resolution Site Characterization . EarthDoc. doi: 10.3997/2214-4609.201901933. Fulltekst i vitenarkiv
• Jones, Morgan Thomas; Hammer, Øyvind; Bucher, Hugo; Schneebeli-Hermann, Elke; Mather, Tamsin & Svensen, Henrik [Vis alle 7 forfattere av denne artikkelen] (2019). Are Mercury Anomalies a Reliable Proxy for LIP Volcanism? Examples from the End-Permian and Early Triassic.
• Zastrozhnov, Dmitrii; Gernigon, Laurent; Gogin, I; Planke, Sverre; Faleide, Jan Inge & Manton, Ben [Vis alle 10 forfattere av denne artikkelen] (2019). Cretaceous-Paleocene tectonostratigraphic development of the Møre and Vøring basins, offshore Mid-Norway . NGF Abstracts and Proceedings of the Geological Society of Norway.
• Polteau, Stephane; Zastrozhnov, Dmitrii; Lebedeva-Ivanova, Nina; Planke, Sverre; Schmid, Daniel Walter & Iyer, Karthik Herman [Vis alle 8 forfattere av denne artikkelen] (2019). An integrated conjugate margin approach for hydrocarbon exploration in the outer Vøring Basin . NGF Abstracts and Proceedings of the Geological Society of Norway.
• Planke, Sverre; Millett, John; Jerram, Dougal Alexander; Zastrozhnov, Dmitrii; Maharjan, Dwarika & Manton, Ben [Vis alle 9 forfattere av denne artikkelen] (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.
• Manton, Ben; Planke, Sverre; Millett, John; Zastrozhnov, Dmitrii; Mazzini, Adriano & Muller, Philipp [Vis alle 7 forfattere av denne artikkelen] (2019). Hydrothermal vent complexes acting as preferential fluid migration pathways in the Møre and Vøring basins. NGF Abstracts and Proceedings of the Geological Society of Norway.
• Lebedeva-Ivanova, Nina; Polteau, Stephane; Zastrozhnov, Dmitrii; Planke, Sverre; Bellwald, Benjamin & Vanneste, Maarten [Vis alle 8 forfattere av denne artikkelen] (2019). A new method for offshore meter-scale 3D site characterization . NGF Abstracts and Proceedings of the Geological Society of Norway.
• 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.
• Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge & Nystuen, Johan Petter [Vis alle 7 forfattere av denne artikkelen] (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.
• Corseri, Romain; Faleide, Thea Sveva; Faleide, Jan Inge; Midtkandal, Ivar; Serck, Christopher Sæbø & Trulsvik, Mikal [Vis alle 7 forfattere av denne artikkelen] (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.
• Bellwald, Benjamin; Planke, Sverre; Polteau, Stephane; Lebedeva-Ivanova, Nina; Faleide, Jan Inge & Morris, S [Vis alle 8 forfattere av denne artikkelen] (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.
• Bellwald, Benjamin; Planke, Sverre; Barrett, Rachel; Berndt, Christian; Manton, Ben & Myklebust, Reidun (2019). Characterization of glacigenic debris flows and megaslides of the North Sea Fan from 3D seismic data . NGF Abstracts and Proceedings of the Geological Society of Norway.
• Barrett, Rachel; Bellwald, Benjamin; Krastel, Sebastian; Gross, Felix; Micallef, Aaron & Planke, Sverre [Vis alle 9 forfattere av denne artikkelen] (2019). New Constraints on the Failure Mechanism and Kinematics of the Tampen Slide (North Sea) from 3D Seismic Data .
• Bellwald, Benjamin; Planke, Sverre; Barrett, Rachel; Batchelor, Christine & Myklebust, Reidun (2019). Characterization of Glacigenic Debris Flows, Megaslides and Contourites of the North Sea Fan from 3D Seismic Data .
• Manton, Ben; Planke, Sverre; Millet, John; Zastrozhnov, Dmitrii; Mazzini, Adriano & Muller, Philipp [Vis alle 7 forfattere av denne artikkelen] (2019). Hydrothermal vent complexes acting as preferential fluid migration pathway: a comparative study of the NE Atlantic and Indonesia .
• Blischke, Anett; Brandsdottir, Bryndis; Erlendsson, Ögmundur; Planke, Sverre & Gaina, Carmen (2019). The Jan Mayen microcontinent and Iceland Plateau volcanic breakup margins.
• Planke, Sverre (2019). Emplacement processes of large-volume basaltic sequences during the formation of volcanic rifted margins .
• Svensen, Henrik; John, Timm; Weyer, Stefan; Fristad, Kirsten; Polozov, Alexander & Bajard, Manon Julietto Andree [Vis alle 8 forfattere av denne artikkelen] (2019). Bacterial sulphate- and iron reduction in a Siberian Traps crater lake during the end-Permian crisis .
• Polozov, Alexander; Planke, Sverre; Millett, John; Svensen, Henrik & Jerram, Dougal Alexander (2019). Hybrid rocks formation at onset of the Siberian Traps basalt lavas eruption and shallow intrusions emplacement.
• Kjøll, Hans Jørgen; Andersen, Torgeir Bjørge; Galland, Olivier; Corfu, Fernando; Labrousse, Loic & Tegner, Christian [Vis alle 7 forfattere av denne artikkelen] (2019). Deep section of a Neoproterozoic fossil magma rich rifted margin exposed. Vis sammendrag

  Structures of rifted continental margins are the finite result of active processes when continents rift apart. During the convergent stages of Wilson cycle, remnants of rifted margins may be incorporated into orogens, especially the magma-poor end-member. The magma-rich margins, however, are commonly lost in subduction due to low buoyancy. The understanding of magma-rich margins is therefore mostly based on drill holes and geophysical observations. In this contribution, we explore the temporal evolution and the ambient conditions of a magma-rich rifted margin preserved within the Scandinavian Caledonides. The Scandinavian Dyke Complex was emplaced in a sedimentary basin during the opening of the Iapetus Ocean 615 to 590 million years ago. The dyke complex now constitutes 70-90% of the area and is locally well-preserved despite the complex Caledonian history. Five field seasons in northern Sweden and Norway provide new observations from regional to microscopic scale about the structural geometry, relative timing, and development of the margin. Jadeite in clinopyroxene geothermobarometry, titanium in biotite geothermometry and garnet isopleth modeling show that the ambient pressure and temperature conditions were similar for the entire dyke complex at 0.25 to 0.45 GPa, with contact metamorphic temperatures up to c. 700◦C. Using a photomosaic of a large and well-exposed cliff face we used layers in the metasediments as markers to restore the host-rock back to the pre-dike configuration, allowing us to quantify the average strain accommodated by the dyke swarm. It accommodated for >100% extension and for 27% crustal thickening. From this we infer that the magma influx rate was higher than the tectonic stretching rate, implying that magma was emplaced in a forceful manner, which is also supported by field observations. In the northern part of the study area, high precision dating of magmatic zircon shows that significant partial melting of the sedimentary host-rock, at relatively shallow levels, occurred at 613 ± 1 Ma. This shows that the crust was molten already 6 Ma before the dyke swarm was emplaced at 606 ± 2 Ma. We propose that the locally pervasive partial melting occurred due to high geothermal gradient and introduction of mafic melts in the lower crust. These processes caused a rapid shallowing of the brittle-ductile transition, which thereby significantly reduced the strength of the crust.

• Svensen, Henrik; Jerram, Dougal Alexander; Polozov, Alexander; Jones, Morgan Thomas; Augland, Lars Eivind & Planke, Sverre (2018). Volcanic causes for the PETM and other past hothouse climates.
• Jones, Morgan Thomas; Stokke, Ella Wulfsberg; Schultz, Bo; Augland, Lars Eivind; Planke, Sverre & Tegner, Christian [Vis alle 9 forfattere av denne artikkelen] (2018). Fur Island in Denmark: A window into Paleocene-Eocene hyperthermals and North Atlantic volcanism.
• Jerram, Dougal Alexander; Svensen, Henrik; Planke, Sverre; Millett, John M; Jones, Morgan Thomas & Augland, Lars Eivind [Vis alle 7 forfattere av denne artikkelen] (2018). Types and styles of volcanism in the North Atlantic Igneous Province: Implications towards understanding their potential climatic impact.
• Karstens, Jens; Haflidason, Haflidi; Becker, Lukas; Berndt, Christian; Rüpke, Lars Helmuth & Planke, Sverre [Vis alle 9 forfattere av denne artikkelen] (2018). Correction: Glacigenic sedimentation pulses triggered post-glacial gas hydrate dissociation (Nature Communications DOI: 10.1038/s41467-018-03043-z). Nature Communications. ISSN 2041-1723. 9(1). doi: 10.1038/s41467-018-03587-0.

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