Subsurface Investigation of Dokdo Island using Geophysical Methods

물리탐사기법의 독도 지반조사 적용

  • 김창렬 (한국지질자원연구원 광물자원연구본부) ;
  • 박삼규 (한국지질자원연구원 광물자원연구본부) ;
  • 방은석 (한국지질자원연구원 광물자원연구본부) ;
  • 김복철 (한국지질자원연구원 국토지질연구본부)
  • Published : 2008.11.30

Abstract

Electrical resistivity and seismic refraction surveys were conducted to investigate geologic structures and geotechnical characteristics of the subsurface, along with rock physical property measurements in Dokdo island. The survey results in Seodo island show that the fault adjacent to the fisherman's shelter is a normal fault and extended towards the NW direction, and that Bedded Lapilli Tuff in the downstream was more severely influenced by weathering and erosion than Trachy Andesite II in the upstream of the survey area. In Dongdo island, Trachy Andesite III and Scoria Bedded Lapilli Tuff were severely weathered and eroded, considered as weathered to soft rock formations, and their weathered zone becomes thicker towards the antiaircraft facility in the NE direction of the survey area. The study results also illustrate that Trachyte and Trachy Andesite are hardest, Massive Tuff Breccia is next, and Stratified Ash Tuff is the most soft rock in Dokdo island.

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