Deep Rotary Core Drilling in Ice.

Rotary drilling equipment was modified and used to obtain cores from glaciers in Northwest Greenland, Byrd Station and Little America V, Antarctica. Using cold compressed air, specially designed bits and other modifications, cores were obtained to 1345 feet in Greenland, 1000 feet at Byrd Station an...

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Bibliographic Details
Main Author: Lange,G. Robert
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1973
Subjects:
Geology
Geochemistry and Mineralogy
Snow
Ice and Permafrost
*DRILLING
GEOLOGICAL SURVEYS
ICE
POLAR REGIONS
ANTARCTIC REGIONS
GREENLAND
GLACIERS
DRILLING MACHINES
ROTARY DRILLING
Antarctic
Ross Ice Shelf
Greenland
Byrd
Byrd Station
Little America
Little America V
Antarc*
Antarctica
Ice
Ice Shelf
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0758156
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0758156
Description
Summary:Rotary drilling equipment was modified and used to obtain cores from glaciers in Northwest Greenland, Byrd Station and Little America V, Antarctica. Using cold compressed air, specially designed bits and other modifications, cores were obtained to 1345 feet in Greenland, 1000 feet at Byrd Station and the Ross Ice Shelf was penetrated to a depth of 840 feet at Little America V. In all locations cracks in the core appeared with increasing frequency at depth due to the sudden release of the overburden load when the core was cut in the air-filled hole. Special equipment and techniques developed dealt with the problem with some success. (Author Modified Abstract)

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