Tectonic zoning of Wrangel Island, Arctic region
| Autor: | Sergey D. Sokolov, A. V. Moiseev, N. A. Malyshev, V. E. Verzhbitskii, M. Yu. Gushchina, M. I. Tuchkova |
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| Rok vydání: | 2017 |
| Předmět: |
geography
geography.geographical_feature_category Felsic 010504 meteorology & atmospheric sciences Geochemistry Tectonic phase Geology 010502 geochemistry & geophysics 01 natural sciences Unconformity Devonian Volcanic rock Basement (geology) Carboniferous Structural geology Petrology 0105 earth and related environmental sciences |
| Zdroj: | Geotectonics. 51:3-16 |
| ISSN: | 1556-1976 0016-8521 |
| Popis: | The Northern, Central, and Southern zones are distinguished by stratigraphic, lithologic, and structural features. The Northern Zone is characterized by Upper Silurian–Lower Devonian sedimentary rocks, which are not known in other zones. They have been deformed into near-meridional folds, which formed under settings of near-latitudinal shortening during the Ellesmere phase of deformation. In the Central Zone, mafic and felsic volcanic rocks that had been earlier referred to Carboniferous are actually Neoproterozoic and probably Early Cambrian in age. Together with folded Devonian–Lower Carboniferous rocks, they make up basement of the Central Zone, which is overlain with a angular unconformity by slightly deformed Lower (?) and Middle Carboniferous–Permian rocks. The Southern Zone comprises the Neoproterozoic metamorphic basement and the Devonian–Triassic sedimentary cover. North-vergent fold–thrust structures were formed at the end of the Early Cretaceous during the Chukchi (Late Kimmerian) deformation phase. |
| Databáze: | OpenAIRE |
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