Glacial and palaeoenvironmental history of the Cape Chelyuskin area, Arctic Russia

Polar research

Maxim Pavlov¹  Grigorij Fedorov¹  Per Möller²  Marit-Solveig Seidenkrantz³  Charlotte Sparrenbom⁴ 

[1] Arctic and Antarctic Research Institute, 538 Bering Street, RU-199397 St. Petersburg, Russia;DQuaternary Sciences, Dept. of Geology, GeoBiosphere Science Centre, Lund University, Sölvegatan 12, SE-22362 Lund, SwedenCorrespondence;Dept. of Earth Science, University of Aarhus, Høegh-Guldbergs Gade 2, DK-8000 Århus, Denmark;Swedish Geotechnical Institute, Hospitalsgatan 16A, SE-21133 Malmö, Sweden

关键词: Eemian;    glacial geology;    glacial stratigraphy;    Kara Sea ice sheet;    Siberia.;   

DOI  :  10.1111/j.1751-8369.2008.00066.x

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Quaternary glacial stratigraphy and relative sea-level changes reveal at least two glacial expansions over the Chelyuskin Peninsula, bordering the Kara Sea at about 77°N in the Russian Arctic, as indicated from tills interbedded with marine sediments, exposed in stratigraphic superposition, and from raisedbeach sequences mapped to altitudes of at least up to ca. 80 m a.s.l. Chronological control is provided by accelerator mass spectrometry 14C dating, electron-spin resonance and optically stimulated luminescence geochronology. Major glaciations, followed by deglaciation and marine inundation, occurred during marine oxygen isotope stages 6–5e (MIS 6–5e) and stages MIS 5d–5c. These glacial sediments overlie marine sediments of Pliocene age, which are draped by fluvial sediment of a pre-Saalian age, thereby forming palaeovalley/ basin fills in the post-Cretaceous topography. Till fabrics and glacial tectonics record expansions of local ice caps exclusively, suggesting wet-based ice cap advance, followed by c...

【 授权许可】

CC BY-NC