Geologic Structure of Baffin Bay and Davis Strait as Determined by Geophysical Techniques1
Published:January 01, 1973
Analysis of magnetic and bathymétrie data recently collected by Canadian research ships gives no indication of a median ridge or valley in Baffin Bay. However, the shallow depth of the mantle in the center of the bay suggests that the crust is oceanic and may have been created by sea-floor spreading. Tertiary basalts in Davis Strait also could be related to a spreading event. Rapid sedimentation in the basin has obscured basement structures. Magnetic data at present are insufficient to determine the extent and direction of possible spreading.
Seismic profiles on both sides of the bay show horst-and-graben structures which may indicate that the area began to form in the Precambrian and opened primarily during Tertiary time.
The Melville Bay graben may contain a thick section of Cretaceous-Tertiary rocks related to those of the Disko Island area.
Figures & Tables
Following the discovery of Prudhoe Bay oil field in 1968, much attention was turned to the Arctic in the search for giant hydrocarbon accumulations. The Soviets had already proved giant reserves in their West Siberian Basin, and exploration was moving ahead quickly in the Canadian Arctic. Plans were drawn up for an AAPG Symposium on Arctic Geology and held in February 1971. Papers were selected from the Symposium for this publication and cover seven topical groupings: Regional Arctic Geology of Canada, Regional Arctic Geology of the Nordic Countries, Regional Arctic Geology of the USSR, Regional Arctic Geology of Alaska, Comparisons in the North Atlantic Borders, Evolution of the Arctic Ocean Basin, and Economics of Petroleum Exploration and Production in the Arctic.