Depositional environment, ichnological features and oxygenation of Permian to earliest Triassic marine sediments in central Spitsbergen, Svalbard

Polar research

Jesper Kresten Nielsen²  Nils-Martin Hanken³  Stefan Piasecki³  Alfred Uchman⁵  Sten-Andreas Grundvåg⁶ 

[1] Department of Arctic Geology The University Centre in Svalbard, PO Box 156, NO-9171 Longyearbyen, Norway;Department of Geosciences University of Oslo, PO Box 1047 Blindern, NO-0316 Oslo, Norway;Department of Geology University of Tromsø—the Arctic University of Norway, Dramsveien 201, NO-9037 Tromsø, Norway;Geological Museum Natural History Museum of Denmark, Øster Voldgade 5–7, DK-1350 Copenhagen K, DenmarkCorrespondence;Institute of Geological Sciences Jagiellonian University, Oleandry Str. 2a, PL-30-063, Kraków, Poland;MOL Norge AS Trelastgata 3, NO-0191 Oslo, Norway

关键词: Trace fossils;    Permian–Triassic boundary;    palynology;    spiculites;    trace elements;    anoxicity;   

DOI  :  10.3402/polar.v35.24782

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Late 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–lo...

【 授权许可】

CC BY-NC