Very-low-frequency electromagnetic (VLF-EM) measurements in the Schirmacheroasen area, East Antarctica

P. Gnaneshwar, A. Shivaji, Y. Srinivas, P. Jettaiah, N. Sundararajan

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

To assess the feasibility of the very-low-frequency electromagnetic (VLF-EM) method in the Schirmacheroasen area of East Antarctica, and to investigate its response, VLF-EM measurements were performed along four traverses. The preliminary results reveal the locations of geological boundaries and shear zones/faults, which may indicate that VLF anomalies are due to shear zones or alteration zones located along contacts between different rock types. The strength of the VLF anomaly decreases over the polar ice cap. The inphase component of the VLF anomaly, when processed and interpreted with an analytic signal approach, yields a depth range of 15-30. m, whereas Fraser and Hjelt filter analyses yield a depth range of 25-60. m. The VLF-EM responses along all four traverses, along with their interpretations, are presented here as a case study.

Original languageEnglish
Pages (from-to)11-19
Number of pages9
JournalPolar Science
Volume5
Issue number1
DOIs
Publication statusPublished - Apr 2011

Fingerprint

Antarctica
anomaly
shears
shear zone
electromagnetic method
ice cap
ice
rocks
case studies
filter
rock
methodology

Keywords

  • Antarctica
  • Fraser filtering
  • Inphase
  • Out-of-phase
  • VLF-EM method

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Very-low-frequency electromagnetic (VLF-EM) measurements in the Schirmacheroasen area, East Antarctica. / Gnaneshwar, P.; Shivaji, A.; Srinivas, Y.; Jettaiah, P.; Sundararajan, N.

In: Polar Science, Vol. 5, No. 1, 04.2011, p. 11-19.

Research output: Contribution to journalArticle

Gnaneshwar, P. ; Shivaji, A. ; Srinivas, Y. ; Jettaiah, P. ; Sundararajan, N. / Very-low-frequency electromagnetic (VLF-EM) measurements in the Schirmacheroasen area, East Antarctica. In: Polar Science. 2011 ; Vol. 5, No. 1. pp. 11-19.
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