MEASUREMENTS OF ULTRASONIC WAVE VELOCITIES IN ICE CORES FROM GREENLAND AND ANTARCTICA.

The study to measure ultrasonic P and S wave velocities in the ice cores from Greenland and Antarctica was designed to overcome the limitations of the standard methods. The main object of the study was to determine whether the sonic velocity measurements were consistent with the petrofabrics of the...

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Bibliographic Details
Main Authors: Bentley,Charles R., Bennett,Hugh F.
Other Authors: WISCONSIN UNIV MADISON DEPT OF GEOLOGY
Format: Text
Language:English
Published: 1965
Subjects:
Snow
Ice and Permafrost
(*ICE
*ULTRASONIC RADIATION)
STRUCTURAL GEOLOGY
ANISOTROPY
EXPERIMENTAL DESIGN
PROPAGATION
PIEZOELECTRIC CRYSTALS
EQUATIONS OF MOTION
SEISMIC WAVES
GREENLAND
ANTARCTIC REGIONS
Antarctic
Greenland
Lansing
Antarc*
Antarctica
Ice
Ice Sheet
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0649927
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0649927
Description
Summary:The study to measure ultrasonic P and S wave velocities in the ice cores from Greenland and Antarctica was designed to overcome the limitations of the standard methods. The main object of the study was to determine whether the sonic velocity measurements were consistent with the petrofabrics of the ice cores and thereby establish a method of estimating gross crystal orientation by sonic means. In addition, it provided a means of checking the results determined by refraction seismic methods. The comparison of these results indicated the amount of anisotropy present. The determination of wave attenuation as a function of depth also gave a measure of the mechanical filtering properties of the upper layers in the ice sheet. (Author) Prepared in cooperation with Michigan State Univ., East Lansing, Dept. of Geology.

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