An Electromagnetic Geophysical Survey at an Interior Alaska Permafrost Exposure.

Road construction activity near Fairbanks, Alaska, in the late fall of 1977, revealed a large exposure of Fairbanks silt containing numerous massive ice features. These exposures are typical of those found in this region. Thaw, during the summer of 1978, caused the upper ice-rich sections to retreat...

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Bibliographic Details
Main Authors: Sellmann,P V, Delaney,A J, Arcone,S A
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1979
Subjects:
Geomagnetism
Soil Mechanics
*GEOPHYSICS
*PERMAFROST
ALASKA
CONSTRUCTION
SURVEYS
ROADS
CIVIL ENGINEERING
ELECTROMAGNETISM
COLD WEATHER TESTS
*Electromagnetic geophysical surveys
WU008
AST42
PE62730A
Fairbanks
Ice
permafrost
wedge*
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADA071065
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA071065
Description
Summary:Road construction activity near Fairbanks, Alaska, in the late fall of 1977, revealed a large exposure of Fairbanks silt containing numerous massive ice features. These exposures are typical of those found in this region. Thaw, during the summer of 1978, caused the upper ice-rich sections to retreat several meters. Geophysical techniques were utilized over these exposures to determine if resistive anomalies of ice wedge dimension could be detected. Magnetic induction measurements at three intercoil spacings and low-frequency surface impedance measurements were made about 6 m from the edge of each exposure in April 1978 before thaw commenced. The results agree well with observations of the layering, but most individual anomalies are difficult to interpret because the lateral extent of the ice is unknown. (Author)

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