Abstract: Late Paleozoic and Mesozoic geological evolution of the Arctic
Robert A. Scott, Lev M. Natapov, Alexander Yu. Egorov, Jamie C. Stewart, Algerdas S. Dagys, Lester M. Anderson, Victor D. Ganelin, Mikhail V. Kononov, Yelena I. Pristavakina, Boris B. Baranov, C. F. Hanni Willan, David I. M. MacDonald
Numerous models have been proposed for the evolution of the Arctic region, reflecting the lack of critical data to constrain reconstructions. In particular, speculation surrounds the position of some continental blocks (such as the Taimyr peninsula of Arctic Russia) prior to the Late Mesozoic and Cenozoic opening of the Arctic Ocean. In the absence of suitable kinematic data from the ocean basins themselves, evidence must be sought in the geological history of the surrounding continents. During Permian to Jurassic time, the relative positions of most areas now surrounding the Arctic Ocean remained approximately constant because they were part of Pangea. Substantial evidence exists in the onshore geological record to constrain these relative positions.
A detailed study of Late Paleozoic and Mesozoic geology of the Arctic is being undertaken to provide accurate correlation of stratigraphic and tectonic events. The Arctic formed the northern margin of Pangea (Laurasia during a general drift to higher latitudes throughout this period. The geological history records periodic marine incursions from the north. Some were in response to eustatic sea-level changes, others to tectonic events. This poster illustrates key stages in the geological evolution of the region, illustrated using a series of rock distribution maps and associated reconstructions for specific time slices. The work presented is only an example from a much larger dataset, representing one of the most comprehensive syntheses of Arctic geology ever attempted.
AAPG Search and Discovery Article #90986©1994 AAPG Annual Convention, Denver, Colorado, June 12-15, 1994