The Arctic Alaska-Canada Connection Revisited Jaime Toro, West Virginia University Frances Toro, DOE NETL Ken Bird, USGS Chris Harrison, GSC.

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Presentation transcript:

The Arctic Alaska-Canada Connection Revisited Jaime Toro, West Virginia University Frances Toro, DOE NETL Ken Bird, USGS Chris Harrison, GSC

Wegener, 1929

Canada Basin Eurasia Basin IBCAO, 2001 Amerasia Basin Arctic Alaska- Chukotka Canada Basin Eurasia Basin Amerasia Basin

Rotational Model (Grantz et al. 1990)

Rotational Model Restoration Grantz et al. (1990)

Embry, 1990 Comparison of the Stratigraphy of the North Slope Basin to the Sverdrup Basin

North Slope Stratigraphy K. Bird, USGS MEGA-SEQUENCE

Brooks Range North Slope Canada Basin Prince Patrick Island

Seismic Line along the North Slope Coast NESWBarrow Arch Brookian Sequence Franklinian Sequence Ellesmerian Beaufortian

Seismic Line along the North Slope Coast NE Barrow Arch Brookian Sequence Franklinian Sequence Peard#1 Walakpa#1 S. Barrow#1 Carboniferous Lower Triassic Upper Triassic SW

Brooks Range Carb Carb. Perm. L. Trias L. Trias. L. Jur. North Slope R12

Brooks Range North Slope Canada Basin Prince Patrick Island

76 o 77 o Eglington Is. Melville Is. Prince Patrick Is. Brock Is. Mackenzie King Is.

Lawver et al. (2002) 150 Ma Late Jurassic

120 Ma Early Cretaceous Lawver et al. (2002)

Geology: Persits and Ulmishek, (2003), USGS Aeromagnetic Data: Glebovsky et al. (2000), Naval Research Lab

Conclusions Ellesmerian onlap edges provide a specific link between the North Slope and Prince Patrick Island The Rotational Model best fits the geological and geophysical data The problematic area is in western Chukotka and the Siberian Shelf