Accession Number : AD0711911

Title :   PRELIMINARY REPORTS ON THE USE OF ELECTROMETRY IN STUDYING THE MOVEMENT OF GLACIERS,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Borovinskii,B. A. ; Makarevich,K. G.

Report Date : 1970

Pagination or Media Count : 10

Abstract : The first measurements of the surface rate of movement of glaciers were made 200 years ago. Extensive data on the movement of glaciers have now been collected on a planetary scale, but in the overwhelming majority of cases it characterizes with sufficient accuracy only the surface rates for different parts of glaciers. In determining the rate of ice movement within a glacier when studying the electric field created by an electrode in a borehole it is recommended that the potential gradient be measured, since this is most sensitive to field change. Since the conductivity of an electrode lowered into the ice exceeds by many times the conductivity of the surrounding rock-ice medium, the field will be created for the most part by the electrode itself and the potential gradient can be computed using a formula proposed. (Author)

Descriptors :   (*GLACIERS, MEASUREMENT), MOTION, ELECTRONIC EQUIPMENT, DRILLING, CONDUCTIVITY, ELECTRIC FIELDS, ELECTRODES, USSR

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE