Abstract
The Mjølnir meteorite crater in the Barents Sea was formed at the Juassic/Cretaceous (Volgian-Ryazanian) boundary. The meteorite impacted the organic-rich clays assigned to the Hekkingen Formation (Volgian-Ryazanian age) and penetrated into underlying Middle Jurassic to Triassic rocks. Studies of macro- and microfossil assemblages from core 7329/03-U-01 drilled at the edge of the crater’s central high have revealed the following: 1) a lower unit consisting of strongly disturbed crater fill deposits with a microfossil content similar to that found in the Wilhelmøya Subgroup (Svalbard) and microfloral assemblage similar to those from the Sassendalen Group (Botneheia Formation) and the Storfjorden and Wilhelmøya subgroups on Svalbard; 2) a series of gravity flow deposits containing a mixture of reworked microfloras and -faunas of Middle Triassic/Middle Jurassic origin, and dinoflagellates of Volgian-Ryazanian age; 3) post-impact sediments of the Hekkingen Formation showing anomalous biotal features. In the lowermost post-impact sediments a conspicuous acme of Leiosphaeridia combined with an influx of abundant juvenile freshwater algae (Botryococcus) occurs. This points to brackish surface water conditions. In the same interval, only a few foraminiferids are found while the bivalve Buchia are frequent. High freshwater supply, stratified water-masses and high influx of released nutrients are considered as main factors acting on the post-impact depositional environment. Open marine conditions were restored in the Early Ryazanian.
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References
Birkenmajer K, Pugaczewska H, Wierzbowski A (1982) The Janusfjellet Formation (Jurassic-Lower Cretaceous) at Myklegardfjellet, East Spitsbergen. Palaeontologica Polonica 43: 107–140
Bjærke T (1977) Mesozoic palynology of Svalbard; II, Palynomorphs from the Mesozoic sequence of Kong Karls Land. Norsk Polarinstitutt Årbok 1976: 83–99
Bjærke T (1980) Mesozoic palynology of Svalbard; V, Dinoflagellates from the Agardhfjellet Member (Middle and Upper Jurassic) in Spitsbergen. In: Geological and Geophysical Research in Svalbard and on Jan Mayen Norsk Polarinstitutt, Oslo, Norway, pp 145–167
Bjærke T, Dypvik H (1977) Sedimentological and palynological studies of Upper Triassic-Lower Jurassic sediments in Sassenfjorden, Spitsbergen. Norsk Polarinstitutt Årbok 1976: 131–150
Bremer GMA, Smelror M, Nagy J (2001) Biotic responses to the marine Mjølnir meteorite impact (Volgian-Ryazanian boundary, Barents Sea) [abs.]. In: Smelror M, Dypvik H, Tsikalas F (eds) 7th Workshop of the ESF Impact Program. Norwegian Geological Society, Trondheim, Norway, pp 11–12
Dypvik H, Attrep M Jr. (1999) Geochemical signals of the late Jurassic, marine Mjølnir impact. Meteoritics and Planetary Science 34: 393–406
Dypvik H, Kyte FT, Smelror M (2000) Iridium peaks and algal blooms - The Mjølnir impact. [abs.] Lunar and Planetary Science 31, Abstract #1538, CD - ROM
Dypvik H, Gudlaugsson ST, Tsikalas F, Attrep M Jr, Ferrell RE Jr, Krinsley DH, Mørk A, Faleide JI, Nagy J (1996) Mjølnir structure; an impact crater in the Barents Sea. Geology 24: 779–782
Forsberg AW, Mørk A, Vigran JO (1984) Triassic source rock potential influenced by the green alga Tasmanites. Continental Shelf Institute (IKU), Trondheim, Norway, Report, 36 pp
Gudlaugsson ST (1993) Large impact crater in the Barents Sea. Geology 21: 291–294
Jansa LF (1993) Cometary impacts into ocean: their recognition and the threshold constraint for biological extinctions. Palaeogeography, Palaeoclimatology, Palaeoecology 104: 271–286
Lebedeva NK, Nikitenko BL (1999) Dinoflagellate cysts and microforaminifera of the Lower Cretaceous Yatria River Section, Subarctic Ural, NW Siberia, Russia. Grana 38: 134–143
Leith TL, Weiss HM, Mørk A, Århus N, Elvebakk G, Embry AF, Brooks PW, Stewart KR, Pchelina TM, Bro EG, Verba ML, Danyushevskaya A, Borisov AV (1993) Mesozoic hydrocarbon source-rocks of the Arctic region. In: Vorren TO, Bergsager E, DahlStamnes OA, Holter E, Johansen B, Lie E, Lund TB (eds) Arctic geology and petroleum potential: Proceedings of the Norwegian Petroleum Society Conference, Amsterdam, pp 1–25
Løfaldli M, Nagy J (1980) Foraminiferal stratigraphy of Jurassic deposits on Kongsøya, Svalbard. In: Geological and geophysical research in Svalbard and on Jan Mayen. Norsk Polarinstitutt, Oslo, Norway, pp 63–95
Løfaldli M, Nagy J (1981) Agglutinating foraminifera in Jurassic and Cretaceous dark shales in southern Spitsbergen. In: Verdenius JG, Van-Hinte JE, Fortuin AR (eds) Proceedings of the First Workshop on Arenaceous Foraminifera 7.-9. September, 1981. Continental Shelf Institute (IKU), Trondheim, Norway, pp 91–107
Murray JW (1991) Ecology and Palaeoecology of Benthic Foraminifera. Longman Scientific and Technical, Essex, England, 397 pp
Mørk A, Dallmann WK, Dypvik H, Johannessen EP, Larssen GB, Nagy J, Nøttvedt A, Olaussen S, Pcelina TM, Worsley D (1999) Mesozoic lithostratigraphy. In: Dallmann, WK (ed) Lithostratigraphic lexicon of Svalbard: review and recommendations for nomenclature use: upper Palaeozoic to Quaternary bedrock. Norsk Polarinstitutt, Tromsø, Norway, pp 127–214
Mørk A, Knarud R, Worsley D (1982) Depositional and diagenetic environments of the Triassic and Lower Jurassic succession of Svalbard. In: Embry AF, Balkwill HR (eds) Arctic Geology and Geophysics: Proceedings of the Third International Symposium on Arctic Geology. Canadian Society of Petroleum Geologists, Calgary, Canada, pp 371–398
Nagy J, Basov VA (1998) Revised foraminiferal taxa and biostratigraphy of Bathonian to Ryazanian deposits in Spitsbergen. Micropaleontology 44: 217–255
Nagy J, Løfaldli M, Bäckström SA (1988) Aspects of foraminiferal distribution and depositional conditions in Middle Jurassic to Early Cretaceous shales in eastern Spitsbergen. In: Roegl F, Gradstein FM (eds) Second workshop on Agglutinated foraminifera: proceedings of the second Workshop on Agglutinated Foraminifera Vienna 1986. Abhandlungen der Geologischen Bundesanstalt, Vienna, Austria, pp 287–300
Nagy J, Pilskog B, Wilhelmsen RM (1990) Facies controlled distribution of foraminifera in the Jurassic North Sea basin. In: Hemleben C, Kaminski MA, Kuhnt W, Scott DB (eds) Proceedings of the NATO Advanced Study Institute on Paleoecology, Biostratigraphy, Paleoceanography and Taxonomy of Agglutinated Foraminifera. Reidel Publishing Company, Dordrecht-Boston, pp 621–657
Nagy J, Seidenkrantz M-S (submitted) New foraminiferal taxa and revised biostratigraphy of Jurassic marginal marine deposits on Anholt, Denmark. Micropaleontology
Nøttvedt A, Cecchi M, Gjelberg JG, Kristensen SE, Lonoy A, Rasmussen A, Rasmussen E, Skott PH, van Veen PM (1993) Svalbard-Barents Sea correlation; a short review. In: Vorren TO, Bergsager E, Dahl-Stamnes OA, Holter E, Johansen B, Lie E, Lund TB (eds) Arctic geology and petroleum potential: Proceedings of the Norwegian Petroleum Society Conference. Elsevier, New York, pp 363–375
Riding JB, Fedorova VA, Ilynia VI (1999) Jurassic and lowermost Cretaceous dinoflagellate cyst biostratigraphy of the Russian Platform and Northern Siberia, Russia. American Association of Stratigraphic Palynologists Contribution Series 36: 1–179
Sandbakken PT (2002) A geological investigation of the Mjølnir Crater core (7329/03-U01): with emphasis on shock metamorphosed quartz. Cand. Scient. (Master) thesis, Department of Geology, University of Oslo, 141 pp
Sandbakken P, Dypvik H (2001) The Mjølnir crater–A core description. [abs.] In: Smelror M, Dypvik H, Tsikalas F (eds) 7th Workshop of the ESF Impact Programme. Submarine Craters and Ejecta-Crater Correlations and Icy Impacts and Icy Targets. Norwegian Geological Society, Trondheim, Norway, pp 69–70
Smelror M, Below R (1993) Dinoflagellate biostratigraphy of the Toarcian to Lower Oxfordian (Jurassic) of the Barents Sea region. In: Vorren TO, Bergsager E, Dahl-Stamnes OA, Holter E, Johansen B, Lie E, Lund TB (eds) Arctic geology and petroleum potential: Proceedings of the Norwegian Petroleum Society Conference. Elsevier, New York, pp 495–513
Smelror M, Mørk A, Montail E, Rutledge D, Leereveld H (1998) The Klippfisk Formation: a new lithostratigraphic unit of Lower Cretaceous platform carbonates on the western Barents Shelf. Polar Research 17: 181–202
Smelror M, Dypvik H, Mørk A (2001a). Phytoplankton blooms in the Jurassic-Cretaceous boundary beds of the Barents Sea possibly induced by the Mjølnir meteorite impact. In: Buffetaut E, Koeberl C (eds) Geological and Biological Effects of Impact Events. Springer, Berlin, pp 66–81
Smelror M, Kelly SRA, Dypvik H, Mørk A, Nagy J, Tsikalas F (2001b) Mjølnir ( Barents Sea) meteorite impact offers a Volgian-Ryazanian boundary marker. Newsletter on Stratigraphy 38: 129–140
Smelror M, Mørk A, Mørk MBE, Weiss HM, Løseth H (2001c) Middle Jurassic-Lower Cretaceous transgressive-regressive sequences and facies distribution off northern Nordland and Troms, Norway. In: Martinsen OJ, Dreyer T (eds) Sedimentary environments offshore Norway–palaeozoic to recent: proceedings of the Norwegian Petroleum Society Conference, 3–5 May 1999, Bergen, Norway. Elsevier, Amsterdam, pp 211–232
Tsikalas F, Gudlaugsson ST, Faleide JI (1998) Collapse, infilling and post-impact deformation at the Mjølnir Impact Structure, Barents Sea. Geological Society of America Bulletin 110: 537–552
Vigran JO, Mangerud G, Mørk A, Bugge T, Weitschat W (1998) Biostratigraphy and sequence stratigraphy of the Lower and Middle Triassic deposits from the Svalis Dome, Central Barents Sea, Norway. Palynology 22: 89–141
Wierzbowski A, Århus N (1990) Ammonite and dinoflagellate cyst succession of an Upper Oxfordian-Kimmeridgian black shale core from the Nordkapp Basin, southern Barents Sea. Newsletter on Stratigraphy 22: 7–19
Wignall PB (1994) Black Shales. Clarendon Press, Oxford, 127 pp
Worsley D, Johansen R, Kristensen SE (1988) The Mesozoic and Cenozoic succession of Tromsøflaket. In: Dalland A, Worsley D, Ofstad K (eds) A Lithostratigraphic scheme for the Mesozoic and Cenozoic succession offshore mid- and northern Norway. Oljedirektoratet, Stavanger, pp 42–65
Århus N (199 1) The transition from deposition of condensed carbonates to dark claystones in the Lower Cretaceous succession of the southwestern Barents Sea. Norsk Geologisk Tidsskrift 71: 259–263
Århus N, Kelly SRA, Collins JSH, Sandy MR (1990) Systematic palaeontology and biostratigraphy of two Early Cretaceous condensed sections from the Barents Sea. Polar Research 8: 165–194
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Bremer, G.M.A., Smelror, M., Nagy, J., Vigran, J.O. (2004). Biotic Responses to the Mjølnir Meteorite Impact, Barents Sea: Evidence from a Core Drilled within the Crater. In: Dypvik, H., Burchell, M.J., Claeys, P. (eds) Cratering in Marine Environments and on Ice. Impact Studies. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-06423-8_2
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