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- W1580455901 abstract "Seismic reflection and refraction data were collected in generally ice-covered waters of the Canada Basin and the eastern part of the Chukchi Continental Borderland of the Amerasia Basin, Arctic Ocean, during the late summers of 1988, 1992, and 1993. The data were acquired from a Polar class icebreaker, the U.S. Coast Guard Cutter Polar Star, using a seismic reflection system designed by the U.S. Geological Survey (USGS). The northernmost data extend to 78i 48' N latitude. In 1988, 155 km of reflection data were acquired with a prototype system consisting of a single 195 cubic inch air gun seismic source and a two-channel hydrophone streamer with a 150-m active section. In 1992 and 1993, 500 and 1,900 km respectively of seismic reflection profile data were acquired with an improved six air gun, 674 to 1303 cubic inch tuned seismic source array and the same two-channel streamer. All data were recorded with a DFS-V digital seismic recorder. A 12-channel streamer with a 150-m active section was also used to record some data in 1993. Processed sections feature high quality vertical incidence images to more than 6 km of sub-bottom penetration in the Canada Basin. Refraction data were acquired with U.S. Navy sonobuoys recorded simultaneously with the seismic reflection profiles. In 1988 eight refraction profiles were recorded with the single air gun, and in 1992 and 1993 a total of 47 refraction profiles were recorded with the six air gun array. The sonobuoy refraction records, with offsets up to 35 km, provide acoustic velocity information to complement the short-offset reflection data. The report includes trackline maps showing the location of the data, as well as both digital data files (SEG-Y) and images (TIFF and JPEG) of all of the profiles." @default.
- W1580455901 created "2016-06-24" @default.
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- W1580455901 date "2004-01-01" @default.
- W1580455901 modified "2023-09-27" @default.
- W1580455901 title "Seismic reflection and refraction data acquired in 1988, 1992, and 1993 in the Canada Basin, Northwind Ridge, and Northwind Basin, Arctic Ocean; USGS Open-File Report" @default.
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