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Instruments and Methods: Portable Thermal Core Drill for Temperate Glaciers

Shreve, R. L. and Kamb, W. B. (1964) Instruments and Methods: Portable Thermal Core Drill for Temperate Glaciers. Journal of Glaciology, 5 (37). pp. 113-117. ISSN 0022-1430. doi:10.3189/S002214300002863X.

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In the summer of 1962 a completely portable and relatively simple electrically heated thermal core drill of new design was constructed and used to obtain 16 oriented samples of ice 2.5 cm. in diameter by 120 cm. in length from depths ranging from 12 m. to 137 m. in lower Blue Glacier, Mount Olympus, Washington, U.S.A. The thermal element is a 0.260-in. (0.66-cm.) diameter 300-W. 150-V. tubular heater bent to form an annulus with an external diameter of 5.0 cm. Opposed ratchet-like teeth break off and hold the core inside the tubular core barrel. Orientation is recorded photographically by a commercial inclinometer modified to show azimuth and to be controlled from the surface.

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Additional Information:© 1964 International Glaciological Society. MS. received 16 July, 1963. Publication No. 297 of the Institute of Geophysics, University of California, Los Angeles; Publication No. 1174 of the Division of Geological Sciences, California Institute of Technology. This work is part of the lower Blue Glacier research program directed by Professor R. P. Sharp of the California Institute of Technology. It was supported by the National Science Foundation (Grant G17688) and by the University of California (Grant No. 1694). The National Park Service graciously gave permission for the field tests, and personnel of Olympic National Park aided the project in numerous ways. Mr. William R. Fairchild, of the Angeles Flying Service, Port Angeles, Washington, provided logistical support. Mr. William Parsons, of the Parsons Survey Company, South Gate, California, kindly supplied the inclinometer, modified it to record azimuth, and provided vital consultation on the other changes required. Professor C. R. Alien and Mr. Curtis Bauman contributed generously to the success of the core drill, both in the laboratory and on the glacier; their invaluable assistance is warmly appreciated.
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University of California1694
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Caltech Division of Geological Sciences1174
Issue or Number:37
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Official Citation:Shreve, R., & Kamb, W. (1964). Instruments and Methods: Portable Thermal Core Drill for Temperate Glaciers. Journal of Glaciology, 5(37), 113-117. doi:10.3189/S002214300002863X
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90961
Deposited By: Tony Diaz
Deposited On:16 Nov 2018 18:51
Last Modified:16 Nov 2021 03:37

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