Crustal structure of the East Siberian continental margin, Podvodnikov and Makarov basins, based on refraction seismic data (TransArctic 1989–1991)
N. N. Lebedeva-Ivanova, D. G. Gee, M. B. Sergeyev, 2011. "Crustal structure of the East Siberian continental margin, Podvodnikov and Makarov basins, based on refraction seismic data (TransArctic 1989–1991)", Arctic Petroleum Geology, Anthony M. Spencer, Ashton F. Embry, Donald L. Gautier, Antonina V. Stoupakova, Kai Sørensen
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The c. 1500 km-long refraction and shallow reflection seismic profile, TransArctic 1989–1991 from the East Siberian shelf northwards across the Podvodnikov and Makarov basins, provides a four-layer model of the crust: layer I (Vp=1.7–3.8 km s−1) of sedimentary formations of late Mesozoic and Cenozoic age; layer II (Vp=5.0–5.4 km s−1) of older sedimentary rocks on the shelf and possibly also mafic volcanics in the basins; layer III (Vp=5.9–6.5 km s−1); and layer IV (Vp=6.7–7.3 km s−1) of crystalline crust. The East Siberian margin has c. 40 km thick continental crust, mainly composed of layers III and IV, both c. 15 km thick. Beneath the Podvodnikov Basin, the Moho depth varies from c. 20 km bsl at southern and northern ends to c. 30 km bsl at the centre beneath the Arlis Gap; it was probably formed by longitudinal extension of continental crust during the late Mesozoic. The edge of the Alpha–Mendeleev Ridge, separating the Podvodnikov and Makarov basins, has a crustal thickness of c. 25 km, mainly composed of layers III and IV. The deep Makarov Basin is probably composed of oceanic crust, 8–12 km thick, but includes spurs of continental crust, rifted off the Lomonosov Ridge.
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Arctic Petroleum Geology
The vast Arctic region contains nine proven petroleum provinces with giant resources but over half of the sedimentary basins are completely undrilled, making the region the last major frontier for conventional oil and gas exploration. This book provides a comprehensive overview of the geology and the petroleum potential of the Arctic. Nine papers offer a circum-Arctic perspective on the Phanerozoic tectonic and palaeogeographic evolution, the currently recognized sedimentary basins, the gravity and magnetic fields and, perhaps most importantly, the petroleum resources and yet-to-find potential of the basins. The remaining 41 papers provide data-rich, geological and geophysical analyses and individual oil and gas assessments of specific basins throughout the Arctic. These detailed and well illustrated studies cover the continental areas of Laurentia, Baltica and Siberia and the Arctic Ocean. Of special interest are the 13 papers providing new data and interpretations on the extensive, little known, but promising, basins of Russia.
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