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dc.contributor.authorUchman, Alfred
dc.contributor.authorHanken, Nils-Martin
dc.contributor.authorNielsen, Jesper Kresten
dc.contributor.authorGrundvåg, Sten-Andreas
dc.contributor.authorPiasecki, Stefan
dc.date.accessioned2017-03-16T11:59:02Z
dc.date.available2017-03-16T11:59:02Z
dc.date.issued2016
dc.description.abstractLate Early Permian–lowermost Triassic carbonate, siliceous (spiculites) and clastic marine sediments in the Marmierfjellet area (Isfjorden, central Spitsbergen) contain a relatively diverse and abundant trace fossil assemblage providing important information about the depositional processes. The Vøringen Member (Late Artinskian–Kungurian) of the Kapp Starostin Formation (Late Artinskian–? Changhsingian) contains trace fossils (Nereites, Phycosiphon, Zoophycos and Arenicolites—common in tempestites) typical of the proximal–archetypal Cruziana ichnofacies, which indicates lower shoreface. Nereites, Phycosiphon and Zoophycos, accompanied by other rare trace fossils, characterize the Svenskegga and Hovtinden members of the Kapp Starostin Formation. They are interpreted as the distal Cruziana ichnofacies, possibly transitional to the Zoophycos ichnofacies typical of the lower offshore zone. However, the sporadic occurrences of Arenicolites and Macaronichnus can point to episodic shallowing to upper offshore–lower shoreface. The lowest part of the Triassic Vikinghøgda Formation (Induan–Olenekian) contains a very low-diverse ichnoassemblage composed of a few simple and branched forms ascribed to the impoverished Cruziana ichnofacies (lower to upper offshore environment), which is attributed to the early recovery stage after the Permian–Triassic extinction. The trace fossils and loss of primary sedimentary structures caused by intense bioturbation throughout most of the section point to generally oxygenated pore waters on the sea floor. However, some horizons, especially laminated black shales, display reduced or no bioturbational activity. These horizons also show high V/(V+Ni) ratios, which indicate oxygen-depleted sediments with periods of anoxic conditions. A remarkable black shale unit deposited under anoxic and sulphidic conditions occurs at the Permian–Triassic transition.en_US
dc.description.sponsorshipFieldwork in Svalbard was funded by the Norwegian Research Council and the University of Tromsø (NMH). AU received additional support from the Jagiellonian University (DS funds). SAG received funding from the Arctic Petroleum Exploration project (Research Centre for Arctic Petroleum Exploration) which is funded by the Research Council of Norway (grant no. 228107).en_US
dc.descriptionPublished version. Source at <a href=http://doi.org/10.3402/polar.v35.24782>http://doi.org/10.3402/polar.v35.24782</a>. License <a href=https://creativecommons.org/licenses/by-nc/4.0/>CC BY-NC 4.0</a>.en_US
dc.identifier.citationUchman A, Hanken NM, Nielsen JK, Grundvåg S, Piasecki S. Depositional environment, ichnological features and oxygenation of Permian to earliest Triassic marine sediments in central Spitsbergen, Svalbard. Polar Research. 2016;35en_US
dc.identifier.cristinIDFRIDAID 1382107
dc.identifier.doi10.3402/polar.v35.24782
dc.identifier.issn0800-0395
dc.identifier.issn1751-8369
dc.identifier.urihttps://hdl.handle.net/10037/10734
dc.language.isoengen_US
dc.publisherTaylor & Francisen_US
dc.relation.journalPolar Research
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FundingProgram/228107/Norway///en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectTrace fossilsen_US
dc.subjectPermian–Triassic boundaryen_US
dc.subjectpalynologyen_US
dc.subjectspiculitesen_US
dc.subjecttrace elementsen_US
dc.subjectanoxicityen_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.titleDepositional environment, ichnological features and oxygenation of Permian to earliest Triassic marine sediments in central Spitsbergen, Svalbarden_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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