A geophysical survey of the Spitsbergen Margin and surrounding areas |
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Authors: | Dmitry Baturin Tatiana Fedukhina Leo Savostin Artem Yunov |
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Institution: | (1) GECO-PRAKLA, Europe Africa Marine Region, Stavanger, Norway;(2) SEVMORGEOLOGIA, Marine Arctic Geological Expedition, Murmansk, Russia;(3) Russian Academy of Science, LARGE International, Institute of Oceanology, Moscow, Russia;(4) NIIMorgeophysica, Murmansk, Russia |
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Abstract: | New geophysical information including multichannel seismic profiling data obtained by the PGO Sevmorgeologia Ministry of Geology of the former USSR, Murmansk during 1984–1988 is discussed and interpreted in this study. The deep structure, sedimentary cover and stratigraphy of the Spitsbergen Continental Margin, considered to be a passive margin, i.e. divergent in the northern part and strike-slip in the western part, is described.Two genetically different types of plateaus on the continental margin, Yermak in the north and Spitsbergen (Vestnesa) in the west, have been identified.The entire extent of the continental slope of the northern part of the Spitsbergen Continental Margin in the Eurasia Basin is underlain by attenuated continental crust, while at the base of the Southwest Continental Margin, the oceanic crust along almost the entire extent is observed. The sedimentary cover, up to 10 km thick within the West Spitsbergen Continental Margin, is likewise observed. Within the North Spitsbergen Margin, however, it does not exceed 3.5 km in thickness.The extension and deposition within the West Spitsbergen Margin began in early Oligocene, while the rifting with accompanying sedimentation within the North Spitsbergen Continental Margin started probably in Early Cretaceous. |
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Keywords: | Spitsbergen Continental Margin Spitsbergen Plateau Yermak Plateau seismic sequence seismostratigraphy continent-ocean transition zone |
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