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Title: Seismic survey 1957, Thule area, Greenland
Authors: Roethlisberger, Hans.
Keywords: Seismic surveys
Ice cover
Ice cover thickness
Glacier ice
Thule, Greenland
Publisher: U.S. Army Snow, Ice, and Permafrost Research Establishment.
Engineer Research and Development Center (U.S.)
Series/Report no.: SIPRE report ; 64.
Description: Technical Report
Summary: Seismic reflection soundings have been carried out in the vicinity of Camp TUTO, Thule, Greenland, on the edge of the ice cap. Ice thicknesses ranging from 200 to 800 ft have been determined. With a short shot point to geophone distance only sporadic results could be obtained, while with a long distance, up to 3.5 times the 'ice thickness, very strong reflection signals were recorded. Evidence was found that some of the reflections did not occur at a single clear interface, indicating the presence of alternate layers of moraine and ice at the bottom of the ice cap. At one location, where the result of the seismic sounding could be compared with drilling results, the error was found to be less than 10 ft, the depth at the place being about 200 ft. Later reflection signals on the seismic records are analyzed by means of a master chart (Fig. 7). The usefulness of the refraction method has been established along the ice tunnel.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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