Print this pageTectonic Structure and Geological History of Russian Chukchi Sea and East Siberian Sea Shelf
Anatoly M. Nikishin1, Alexander Savitsky2, and Alexander Grevtsev2
1Geological Faculty, Moscow State University, Moscow, Russia.
2Dalmorneftegeophysica, Yuzhno-Sakhalinsk, Russia.
We have described the main tectonic units of Russian Chukchi Sea and East Siberian sea basement. Areas with Mesozoic and pre-Late Devonian continental crust were recognized.
The interpretation of the seismic data obtained by the DMNG allows to precise the details of geologic structure of the following sedimentary basins: North Chukchi Basin, North-Wrangel Basin, South Chukchi Basin (including Billings, Shmidt, and Hope basins), Vilkitskii Basin, East Siberian Sea Basin, and Novosibirsk Basin.
Most of these basins comprise both rifts and postrift depressions. The North Wrangel basin was evolved as a foredeep trough of the Herald thrust-fold belt.
Three epochs of rifting were recognized: Late Paleozoic, Mesozoic and Cenozoic. Most rift-postrift basins suffered inversion and/or strike-slip deformations. For some basins, the transpressional tectonics is quite typical. The basins are separated by highs: Wrangel-Herald High, Shelagskoe High, Baranovskoe High. The Wrangel-Herald High was formed during the Mesozoic, but the large scale Cenozoic uplift also took place.
The petroleum systems of sedimentary basins are discussed.
AAPG Search and Discover Article #90096©2009 AAPG 3-P Arctic Conference and Exhibition, Moscow, Russia