GPR Profile of Beacon Valley, Dry Valleys, Antarctica: Analysis of the GPR Response from Rocky Permafrost

David C. Nobes, Ronald S. Sletten, Michele T. Bannister, Myfanwy J. Godfrey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Results of ground penetrating radar (GPR) profiling of Beacon Valley in Antarctica suggests that significant quantities of ice are present. A more detailed analysis of widespread diffractions highlights the large variations in the GPR velocity, both laterally and with depth. The dominant aspect of the data is the strong layering of the velocity, with high velocities (0.13 m/ns or greater) in the upper approximately 200 ns (about 13 metres) and low velocities (0.11 m/ns or less) below. The most striking feature is a near vertical zone of low velocities, as low as 0.07 m/ns, which appears as a set of diffractions that are 'stacked' one above another. Such a structure is interpreted as a larger-than-normal crack formed in permafrost polygonal patterned ground or possibly a relict crevasse.

Original languageEnglish
Title of host publication17th International Conference on Ground Penetrating Radar (GPR 2018): Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Print)9781538657775
DOIs
Publication statusPublished - 23 Aug 2018
Event17th International Conference on Ground Penetrating Radar, GPR 2018 - Rapperswil, Switzerland
Duration: 18 Jun 201821 Jun 2018

Publication series

NameInternational Conference on Ground Penetrating Radar (GPR): Proceedings
PublisherIEEE
ISSN (Electronic)2474-3844

Conference

Conference17th International Conference on Ground Penetrating Radar, GPR 2018
CountrySwitzerland
CityRapperswil
Period18/06/201821/06/2018

Keywords

  • Antarctica
  • Beacon Valley
  • Dry Valleys
  • ground penetrating radar
  • permafrost

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Instrumentation

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