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Stemmerik, Lars; Olaussen, Snorre & Braathen, Alvar
(2022).
Late Permian-Early Triassic synrift basin fill: Breakup of Pangea and the first brick in the puzzle of NE Atlantic-Arctic Mesozoic-early Cenozoic continental extension.
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Knarud, Ragnar; Mørk, Atle; Nakrem, Hans Arne & Olaussen, Snorre
(2022).
David Worsley (1943-2022).
Geonytt.
ISSN 0802-6173.
27(2),
s. 14–17.
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Dahlin, Anders; Smyrak-Sikora, Aleksandra; Blinkenberg, Kasper; Olaussen, Snorre & Stemmerik, Lars
(2021).
Digital outcrop models of Upper Paleozoic mixed carbonate-siliciclastic deposits, Svalbard, Arctic Norway: Strengths and challenges.
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Olaussen, Snorre; Grundvåg, Sten-Andreas; Hurum, Jørn Harald & Senger, Kim
(2021).
Back when the dinosaurs were ash-stranded.
Appell.
ISSN 0804-7758.
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Serck, Christopher Sæbø; Poyatos-Moré, Miquel; Midtkandal, Ivar; Braathen, Alvar; Olaussen, Snorre & Osmundsen, Per Terje
[Vis alle 7 forfattere av denne artikkelen]
(2021).
Tectonic basins around basement domes, Oman II.
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Haile, Beyene Girma; Line, Lina Hedvig; Klausen, Tore Grane; Olaussen, Snorre; Eide, Christian Haug & Jahren, Jens
[Vis alle 7 forfattere av denne artikkelen]
(2021).
Identifying and constraining sedimentary recycling from microscopic fluid inclusions in quartz overgrowth.
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Park, Juni; Stein, Holly J.; Hannah, Judith L.; Georgiev, Svetoslav; Yang, Gang & Hammer, Øyvind
[Vis alle 7 forfattere av denne artikkelen]
(2021).
Re-Os geochronology of black shale from Central Spitsbergen, Svalbard: a stepping stone toward establishing the age of the J/K boundary. .
Vis sammendrag
Stage boundaries are determined by integrating bio-, magneto-, and chrono-stratigraphic units. Numerical ages of stage boundaries ideally should be constrained or verified by reliable radiometric ages of sedimentary strata – a challenging task in the absence of ash layers suitable for U-Pb zircon dating. For example, the numerical age of the Jurassic – Cretaceous (J/K) boundary is still uncertain. Recent efforts provided some ammonite biostratigraphy across the J/K boundary in the Slottsmøya Member of the Agardhfjellet Formation on Spitsbergen. However, the age and duration of the uppermost Jurassic (Volgiann stage) and the lowermost Cretaceous (Ryazanian stage) in the Boreal realm remain loosely defined. Our study adds new radiometric ages for this controversial stage boundary and presents geochemical data to evaluate paleoenvironmental settings. Three black shale intervals from two drill cores (DH2 and DH5) located ~7 km apart in Central Spitsbergen provide three Re-Os ages. In DH2, shales from the Slottsmøya Member previously provided conflicting biostratigraphic results (Volgian toRyazanian)[1]. An isochron derived from samples at 497m depth yields an imprecise 146.8 ± 6.8 Ma age, suggesting deposition in the Upper Volgian rather th precludes confirmation. Large uncertainties near the J/K
boundary are typical for this region[2, 3]. Two Re-Os isochron ages from the Oppdalen Member (DH2 at 724 and DH5 at 658 m) yield similar ages of 157.6 ± 3.3 Ma and 157.9 ± 2.9 Ma, respectively. These ages are close to the GTS Oxfordian – Kimmeridgian stage boundary and, even within their uncertainties, suggest Oxfordian – Kimmeridgian deposition. The agreement between these correlative intervals in the two cores[4] lends credence to the accuracy of the Re-Os age.
Biostratigraphic data, however, suggest a somewhat older age. Seafloor erosion, reworking and redeposition, could create this discrepancy between geochronologic and biostratigraphic age determinations. Given that biostratigraphy between the Boreal and Tethyan realms is poorly correlated, the radiometric ages provided by this study could be a stepping stone toward better
connecting the Boreal with the Tethyan realm. But
further work, on all fronts, is needed.
Acknowledgements. Thanks to the UNIS CO2 LAB for access to the drill cores. HS acknowledges the supportof ACS-PRF award # 59965-ND2.
References:
[1] Koevoets, M.J., Hammer, Ø. & Little, C.T.S. (2019). Norwegian Journal of Geology 99, 1-24.
[2] Georgiev, S.V., Stein, H.J., Hannah, J.L., Xu, G.,Bingen, B., & Weiss, H.M. (2017).
EPSL, 461, 151-162.
[3] Markey, R., Stein, H.J., Hannah, J.L., Georgiev,.V., Pedersen, J.H., & Dons, C.E.(2017). Palaeogeography, Palaeoclimatology, Palaeoecology, 466, 209-220.
[4] Koevoets, M.J., Abay, T.B., Hammer, Ø., & Olaussen, S. (2016). Palaeogeography,
Palaeoclimatology, Palaeoecology, 449, 266-274
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Olaussen, Snorre; Larsen, Bjørn Tore & Dahlgren, Sven
(2021).
Late Carboniferous deposits in the Oslo Graben – a regional overview. .
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Würtzen, Camilla Louise; Smyrak-Sikora, Aleksandra; Janocha, Julian; Johannesen, Erik; Olaussen, Snorre & Stemmerik, Lars
(2021).
Facies variability of the continental Lower Carboniferous Billefjorden Group in Central Spitsbergen, Svalbard.
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Dahlin, Anders; Olaussen, Snorre; Smyrak-Sikora, Aleksandra; Stemmerik, Lars & Braathen, Alvar
(2021).
Late Palaeozoic syn-rift basin fill at the Sørkapp-Hornsund High, Southern Spitsbergen. .
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Olaussen, Snorre; Grundvåg, Sten-Andreas; Hurum, Jørn Harald & Senger, Kim
(2020).
Den gangen dinosaurene var askefaste.
Svalbardposten.
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Smyrak-Sikora, Aleksandra; Braathen, Alvar; Julian, Joshua Benjamin; Johannessen, E.P.; Lord, Gabriel & Olaussen, Snorre
[Vis alle 9 forfattere av denne artikkelen]
(2020).
How digital outcrop analysis enhances understanding of rift basin architecture (Billefjorden Trough Svalbard)?
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Smyrak-Sikora, Aleksandra; Braathen, Alvar; Janocha, Julian; Johannessen, E.P.; Lord, Gabriel & Olaussen, Snorre
[Vis alle 8 forfattere av denne artikkelen]
(2020).
On-offshore correlations of the Billefjorden Fault Zone, Svalbard. .
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Würtzen, Camilla Louise; Stemmerik, Lars; Olaussen, Snorre & Ahokas, Juha Matti
(2019).
Facies analysis of the Uppermost Devonian to Lower Carboniferous Billefjorden Group, Central Spitsbergen, Svalbard .
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Olaussen, Snorre; Escalona Varela, Alejandro; Grundvåg, Sten-Andreas; Marin Restrepo, Dora Luz; Senger, Kim & Ohm, Sverre Ekrene
(2019).
Middle Jurassic to Lower Cretaceous Clastic Wedges in the north Atlantic, Barents Sea and High Arctic.
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Olaussen, Snorre; Escalona Varela, Alejandro; Grundvåg, Sten-Andreas; Marin Restrepo, Dora Luz; Ohm, Sverre Ekrene & Senger, Kim
(2019).
Middle Jurassic to Lower Cretaceous Clastic Wedges in the north Atlantic, Barents Sea and High Arctic.
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Grundvåg, Sten-Andreas; Senger, Kim; Larssen, Geir Birger; Olaussen, Snorre & Riis, Fridtjof
(2019).
Late Jurassic – Early Cretaceous sedimentary response to opening of the Amerasian Basin and HALIP activity in Svalbard.
Vis sammendrag
The Upper Jurassic to Lower Cretaceous succession in Svalbard consists of two prominent clastic wedges that prograded in a general southeastward (and later also southwestward) direction in response to recurrent uplift of northern Svalbard and adjacent terranes from the Late Jurassic onwards (Fig. 1A). A strong HALIP signal is well known from the Lower Cretaceous part of the succession. Numerous dolerite intrusions of Early Cretaceous age (Fig. 1B) are present across the entire outcrop belt (with sills predominantly penetrating Permian to Triassic strata) and in nearby offshore areas as revealed by reflection seismic data east and south of Svalbard. Bentonites occur locally as documented in onshore research boreholes. Previously published absolute datings of several intrusions and one bentonite bed yields ages in the range of 123.3–124.7 Ma, pointing to peak HALIP activity in the earliest Aptian. In addition, a regional provenance switch from quartz arenites to plagioclase-rich lithic arenites and volcanic clasts is evident in the Barremian–Aptian part of the succession (Fig. 1C, D, E). In eastern Spitsbergen, paleo-current directions also indicate an emerging provenance area to the NE. Further east at Kong Karls Land, basaltic lava flows occur interbedded with paralic deposits of late Barremian to Aptian age. Collectively, this indicate significant HALIP influence on the sedimentary system in Svalbard during the Early Cretaceous. Less known is the tectono-sedimentary response directly related to the opening of the Amerasian Basin, which pre-dates the short-lived HALIP activity. Several regional unconformities occur in the Upper Jurassic–lowermost Cretaceous succession, including the Oxfordian, the Volgian to lowermost Ryazanian, and the lower Barremian unconformities (Fig. 1A). Although the development and exact timing of the two former unconformities is yet to be investigated, the latter is commonly attributed to regional upwarping and southeastward tilting prior to the main HALIP pulse. Shallow marine and shelf sandstone units in the Upper Jurassic–lowermost Cretaceous succession typically pinch out to the SE, thus indicating a clear northwestern provenance area. We suggest that these sandstone units may record the initial sedimentary response to rift-shoulder uplift during opening of the Amerasian Basin north of Svalbard.
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Abay, Tesfamariam Berhane; Karlsen, Dag Arild; Olaussen, Snorre & Pedersen, Jon Halvard
(2019).
Organic Geochemistry of Petroleum in the Cambro-Ordovician Succession of Ny Friesland, Spitsbergen, Norway.
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Grundvåg, Sten-Andreas; Olaussen, Snorre; Midtkandal, Ivar & Sliwinska, Kasia
(2019).
On the trace of a lower Aptian source rock in Svalbard.
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Senger, Kim; Brugmans, Peter; Grundvåg, Sten-Andreas; Jochmann, Malte Michel; Nøttvedt, Arvid & Olaussen, Snorre
[Vis alle 8 forfattere av denne artikkelen]
(2019).
Petroleum Exploration Onshore Svalbard: A Historical Perspective on the Start of the Norwegian Oil Adventure.
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Würtzen, Camilla Louise; Stemmerik, Lars; Olaussen, Snorre & Ahokas, Juha Matti
(2018).
Facies analysis of the uppermost Devonian to Lower Carboniferous Billefjorden Group, Central Spitsbergen, Svalbard.
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Olaussen, Snorre; Larssen, Geir Birger; Helland-Hansen, William; Johannessen, Erik P.; Nøttvedt, Arvid & Riis, Fritjof
[Vis alle 9 forfattere av denne artikkelen]
(2018).
The outcropping strata in Kong Karls Land archipelago, Arctic Norway; a key reference point for the Upper Triassic to Lower Cretaceous succession in the northern Barents Sea.
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Olaussen, Snorre; Senger, Kim; Birchall, Thomas; Braathen, Alvar; Grundvåg, Sten-Andreas & Hammer, Øyvind
[Vis alle 13 forfattere av denne artikkelen]
(2018).
The Longyearbyen CO2 lab project: lessons learned from a decade of characterizing an unconventional reservoir-caprock system.
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Olaussen, Snorre; Grundvåg, Sten-Andreas; Senger, Kim; Birchall, Thomas & Smyrak-Sikora, Aleksandra
(2018).
Understanding Barents Sea Play Concepts Based on 18 wildcats, and some R&D wells, in Svalbard.
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Birchall, Thomas; Senger, Kim & Olaussen, Snorre
(2018).
Subnormal Pressure Regimes of the Northern Barents Shelf: Causes and Implications for Hydrocarbon Exploration.
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Olaussen, Snorre; Larssen, Geir Birger; Helland-Hansen, William; Johannessen, Erik P.; Nøttvedt, Arvid & Riis, Fridtjof
[Vis alle 9 forfattere av denne artikkelen]
(2018).
The outcropping strata in the Kong Karls Land archipelago, Arctic Norway; a key reference point for the Upper Triassic to Lower Cretaceous succession in the northern Barents Sea.
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Olaussen, Snorre & Rismyhr, Bjarte
(2018).
Large scale tectonics as controlling factor of the Upper Triassic to Middle Jurassic basin fills in Svalbard and nearby pan‐Arctic Basins.
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Koehl, Jean-Baptiste P.; Bergh, Steffen G; Henningsen, Tormod; Faleide, Jan Inge; Smyrak-Sikora, Aleksandra & Olaussen, Snorre
[Vis alle 7 forfattere av denne artikkelen]
(2018).
Mid/Late Devonian-early Carboniferous collapse basins in the Barents Sea and Svalbard.
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Senger, Kim; Farnsworth, Wesley Randall; Christiansen, Hanne H; Gilbert, Graham Lewis; Hancock, Holt John & Hodson, Andrew J.
[Vis alle 16 forfattere av denne artikkelen]
(2018).
Field-based geology education in the high Arctic:
How digital tools can support active learning.
-
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Smyrak-Sikora, Aleksandra Anna; Osmundsen, Per Terje; Braathen, Alvar; Ogata, Kei; Anell, Ingrid Margareta & Husteli, Berit
[Vis alle 8 forfattere av denne artikkelen]
(2017).
Sedimentary architecture of siliciclastic, syntectonic graben and halfgraben fill in Kvalpynten, Edgeøya, Svalbard.
Vis sammendrag
An array of ten grabens/ half-grabens and their associated syntectonic basin fill (averaging approx. 700 m across) are exposed along a 9 km cliff section at Kvalpynten, Edgeøya, offering a unique opportunity to study the silisiclastic architecture of listric graben basin fill. The exposures at Kvalpynten provide a unique opportunity to correlate fault-controlled sedimentary architecture on the scale of meters to hundreds of meters with detailed facies relationships, and thus fault-induced differential accommodation with the depositional environments that filled it.
The basins developed in the Late Triassic, during the deposition of the Early Carnian to Early Norian deltaic successions of Tchermakfjellet and De Geerdalen formations which is approximately the onshore equivalent to the offshore Snadd Formation. The lowermost part of the ca 400 m high Kvalpynten cliff section reveals a number of NW–SE striking growth faults with 50–100 m offset, which bound basins filled with shale and sandstone wedges. Up section, the growth faults tip out, and are buried by undeformed deltaic deposits.
Integrated field studies including sedimentology and structural geology combined with surfaces mapping on a photogrammetric virtual outcrop model allowed incremental reconstruction of the grabens/ half-grabens evolution. Four transgressive surfaces were identified and mapped, allowing correlation of the sandstone packages between each basin. The sequence of faulting has been defined with respect to the mapped flooding surfaces. Faulting clearly occurred in several phases as evident by the syn-kinematic fault’s control on sediments of different ages, and from the occurrence of later forming faults rotating earlier formed fault blocks.
In general, early faults defined a relatively symmetrical basin configuration whereas later phases of movement were localized mainly along south-dipping faults. This gave rise to a change to more asymmetric basins and to the formation of asymmetric, composite sedimentary bodies with stacked shoreface and offshore transition deposits. Locally, fault crests were eroded. Our sedimentological observations suggest that tidal processes were dominant during sandstone deposition within the grabens/half-grabens, expressed by the widespread occurrence of tidal bar and tidal flat deposits.
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Olaussen, Snorre
(2017).
Review of the Middle Jurassic to Lower Cretaceous clastic wedge in Svalbard and the Barents Sea. Oral presentation at CASE – Circum-Arctic Structural Events, March 2017, Hannover, Germany.
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Olaussen, Snorre
(2017).
Oil and gas resources in the Arctic from a geological perspective. Oral presentation at ARCEx Annual Conference 2017, 10-11 May, Malangen, Norway.
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Olaussen, Snorre
(2017).
Upper Triassic to Middle Jurassic key sequence stratigraphic surfaces onshore offshore Arctic Norway; guidelines for prediction of facies development.
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Mulrooney, Mark; Rismyhr, Bjarte; Yenwongfai, Honore Dzekamelive; Leutscher, Johan; Olaussen, Snorre & Braathen, Alvar
(2017).
Impacts of small‐scale faults on continental to coastal plain deposition: Evidence from the Realgrunnen Subgroup in the Goliat field, Southwest Barents Sea, Norway.
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Ogata, Kei; Mulrooney, Mark; Braathen, Alvar; Maher, Harmon; Smyrak-Sikora, Aleksandra Anna & Anell, Ingrid Margareta
[Vis alle 12 forfattere av denne artikkelen]
(2017).
Architecture, deformation style and petrophysical properties of a Late Triassic growth fault system in southern Edgeøya, East Svalbard.
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Anell, Ingrid Margareta; Braathen, Alvar; Røhnert, Daniela; Ogata, Kei; Osmundsen, Per Terje & Smyrak-Sikora, Aleksandra Anna
[Vis alle 10 forfattere av denne artikkelen]
(2017).
Findings of five field foragings. Sandbody distribution, clinoform geometries and depositional environments of Edgeøya, Svalbard.
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Braathen, Alvar; Mulrooney, Mark; Haile, Beyene Girma; Appleyard, Tyler Ross; van Yperen, Anna Elisabeth & Smyrak-Sikora, Aleksandra Anna
[Vis alle 12 forfattere av denne artikkelen]
(2017).
“Delta collapse” – Edgeøya delta system compared to the Ferron delta (Utah)
.
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Senger, Kim; Mulrooney, Mark; Schaaf, Niklas; Tveranger, Jan; Braathen, Alvar & Ogata, Kei
[Vis alle 7 forfattere av denne artikkelen]
(2017).
Characterization and Modelling of a Naturally
Fractured Reservoir-Caprock Unit Targeted for CO2
Storage in Arctic Norway.
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Senger, Kim; Birchall, Thomas; Ohm, Sverre Ekrene; Olaussen, Snorre & Ogata, Kei
(2017).
Review of Geological Controls on Resistivity in Uplifted Basins: Insights from the Norwegian Barents Shelf.
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Solvang, Ole-Marius; Eide, Christian Haug; Helland-Hansen, William; Mangerud, Gunn & Olaussen, Snorre
(2017).
Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen.
Universitetet i Bergen.
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Lord, Gareth Steven; Mørk, Atle & Olaussen, Snorre
(2017).
Sequence stratigraphy and facies Development of the Triassic succession of Svalbard and the Northern Barents Sea.
Norges teknisk-naturvitenskapelige universitet.
ISSN 978-82-326-2465-2.