期刊
INTERNATIONAL GEOLOGY REVIEW
卷 57, 期 2, 页码 199-210出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00206814.2014.999358
关键词
Laptev Sea; palaeogeography; New Siberian Islands; detrital zircon; provenance; late Palaeozoic; Arctic
类别
资金
- Russian Foundation for Basic Research [13-05-00700, 13-05-00943]
- Saint Petersburg State University [3.39.139.2014, VIII.66.1.4]
- Integration Project SB RAS [68, 53, 2]
Detrital zircon U/Pb ages provide new insights into the provenance of Upper Devonian-Permian clastic rocks of Bel'kovsky Island, within the New Siberian Islands archipelago. Based on these new data, we demonstrate that Upper Devonian-Carboniferous turbidites of Bel'kovsky Island were derived from Grenvillian, Sveconorwegian, and Timanian sources similar to those that fed Devonian-Carboniferous deposits of the Severnaya Zemlya archipelago and Wrangel Island and were probably located within Laurentia-Baltica. Detrital zircon ages from the lower Permian deposits of Bel'kovsky Island suggest a drastic change in provenance and show a strong affinity with the Uralian Orogen. Two possible models to interpret this shift in provenance are proposed. The first involves movement of these continental blocks from the continental margin of Laurentia-Baltica towards the Uralian Orogen during the late Carboniferous to Permian, while the second argues for long sediment transport across the Barents shelf.
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