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|Title:||Deep core drilling in ice, Byrd Station, Antarctica|
|Authors:||Arctic Institute of North America.|
United States. National Committee for the International Geophysical Year.
Patenaude, Robert W.
Marshall, Ernest Willard, 1925-
Gow, A. J. (Anthony Jack)
Ice coring rigs
Byrd Station, Antarctica
|Publisher:||U.S. Army Snow, Ice, and Permafrost Research Establishment.|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||SIPRE report ; 60.|
Summary: The preliminary results of core examinations and drill-hole temperature studies from November 1957 - January 1958 are reported, and the drilling equipment and techniques are described. Drilling was accomplished with a Failing model 314 rotary skid-mounted well-drilling rig with a 38-ft mast, powered by a 43-bhp Buda gasoline engine. Two types of bits, both cutting a 3 7/8-in. core and a 5 3/4-in. hole, were used. The speed of rotation was varied from 40 -75 rpm, and the rate of penetration ranged from 2.5-10 in/min. Compressed air was used as the drilling fluid. Good quality cores were obtained down to 1013 ft with a 98% recovery. Examination of the cores revealed the presence of a detailed stratigraphic sequence down to a depth of 400 ft, consisting of alternating layers of coarse and fine -grained snow associated with ice bands 4 mm thick, which appeared singly or in closely spaced groups at regular intervals. Below this depth the ice was very homogeneous, except for thin ice bands which persisted to the bottom; The mean densities for meter increments to a depth of 150 ft, densities determined from spot samples at 5 points from 400-721.5 ft, and drill-hole temperatures down to 1000 ft are tabulated.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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