Opportunities and Priorities in Arctic Geoscience (1991) / Chapter Skim
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4 Rationale for Focusing on the Arctic Ocean Basin and Its Margins
4 Rationale for Focusing on the Arctic Ocean Basin and Its Margins
Pages 14-18
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From page 14... ...
Most onshore sedimentary basins of Arctic Alaska and Canada and the adjacent continental shelves as far north as Banks Island have been explored by reconnaissance or detailed networks of multichannel seismic reflection profiles obtained by both governmental and private organizations. The same holds true for the European Arctic, the arctic areas of the West Siberian Lowland, and the continental shelves in the southern Barents and Kara Seas.
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From page 15... ...
Almost everywhere else in the basin, seismic reflection data consist only of widely scattered single-channel profiles of poor quality and erratic geometry obtained from drifting ice. Exceptions are a multichannel reflection profile collected from ice floes in Pram Strait, several multichannel seismic reflection profiles in the southeast Canada Basin, and about 150 km of single-channel profiles collected from an icebreaker over Northwind Ridge.
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From page 16... ...
and Canadian organizations, and generalized anomaly maps have been constructed for the Arctic from magnetic data collected by the National Aeronautics and Space Administration's Polar Orbiting Geophysical Observatory and by its magnetic satellite. Most of the aeromagnetic lines are too widely spaced, however, to address the important structural and plate tectonic questions of the Arctic.
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From page 17... ...
More closely spaced coverage exists over the Beaufort and Chukchi Shelves and the southern part of the adjacent Northwind Ridge in the North American Arctic, but it is proprietary. Gravity data in the public domain in the Arctic Ocean Basin consists of a 10-km grid of gravity readings from ice floes in the Canadian Beaufort Sea, measurements from several drifting ice stations, some aircraft landings on ice floes, and a few icebreaker tracks.
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From page 18... ...
(Data from Macnab et al., 1990; and national geologic surveys of the arctic nations.)
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