--> Abstract: Pre-Cretaceous Bedrock Geology of the Laptev Sea Shelf: View from the New Siberian Islands, by Alexander Kuzmichev; #90177 (2013)

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Pre-Cretaceous Bedrock Geology of the Laptev Sea Shelf: View from the New Siberian Islands

Alexander Kuzmichev

New map for the pre-Cretaceous bedrock geology of the Laptev Sea shelf is based on field studies in the New Siberian Islands. We cleared up a link between South Taimyr belt and Anjou islands and between Central Taimyr and Bennett Island. The South and Central Taimyr were the part of Siberian platform in Paleozoic and Triassic-Jurassic times. Therefore the most of the Laptev Sea shelf and western East-Siberian Sea shelf can be interpreted as deformed marginal part of Siberian Platform as well. It means that the whole terrane, which usually labeled as ‘New Siberian-Chukotka microcontinent’ or ‘Chukotka - Arctic Alaska microplate’ (and so on) is of Siberian origin and never has collided with Siberia. This north-eastern continuation of Siberian Platform is confined at southeast by the South Anyui and Kolyma Loop Early Cretaceous sutures, which mark the convergent boundary between Siberia and set of Pacific terranes. The northern boundary of Siberia is the Late Paleozoic North-Taimyr suture, which separates it from the Kara Plate. The suture passes through the shelf just southward of Jeannette and Henrietta islands. Proposed model negates general one-pole rotational hypothesis of Amerasia basin opening and is consistent with the two-pole one. The model is useful for hydrocarbon predictions in the pre Cretaceous strata. The stated absence of sutures in the Laptev shelf enables basin modeling throughout the entire shelf linking the Paleozoic and Triassic-Jurassic sections exposed at circum-Laptev lands.

AAPG Search and Discovery Article #90177©3P Arctic, Polar Petroleum Potential Conference & Exhibition, Stavanger, Norway, October 15-18, 2013