Geophysics and Geophysical Exploration (지구물리와물리탐사)

Korean Society of Earth and Exploration Geophysicists (한국지구물리·물리탐사학회)
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A Case Study on The Data Processing and Interpretation of Aeromagnetic Survey Conducted in The Low Latitude Area: Stung Treng, Cambodia

저위도 캄보디아 스퉁트렝 지역의 항공자력탐사 자료처리 및 해석

  • Shin, Eun-Ju (Technology Business Team, Korea Resources Corporation) ;
  • Ko, Kwang-Beom (Technology Business Team, Korea Resources Corporation) ;
  • You, Young-June (Research & Development Team, Korea Resources Corporation) ;
  • Jung, Yeon-Ho (Strategic Metals Exploration Team, Korea Resources Corporation)
  • 신은주 (한국광물자원공사 기술연구원 기술사업팀) ;
  • 고광범 (한국광물자원공사 기술연구원 기술사업팀) ;
  • 유영준 (한국광물자원공사 기술연구원 기술개발팀) ;
  • 정연호 (한국광물자원공사 탐사사업처 전략금속탐사팀)
  • Received : 2012.06.29
  • Accepted : 2012.08.17
  • Published : 2012.08.31
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Abstract

In this case study, we present the various and consistent processing techniques for the reasonable interpretation of aeromagnetic data. In the processing stage, we especially focused on the three major respects. First, in the low latitude area, severe artifacts are occurred as a result of reduction to the pole technique. To overcome this problem, variable alternative methods were investigated. From the comparison of each technique, we concluded that energy balancing method gives more fruitful result. Second, because of limited a priori information, it is nearly impossible to employ detailed geological survey due to wide and thick spreading of soils in the survey area. So we especially investigated the new techniques such as extracting slope, curvature and aspect information mainly used in GIS field as well as conventional methods. Finally, by using the Euler deconvolution, we extracted the depth information on the magnetic anomalous body. From the synthetic analysis between depth information and previous discussed results, the detailed future survey area was proposed. We think that a series of processing techniques discussed in this study may perform an important role in the domestic and abroad resource development project as a useful guideline.

본 연구는 캄보디아 스퉁트렝 지역의 항공자력탐사 자료처리 및 해석에 관한 사례 연구이다. 자료처리 및 해석에는 다음의 세 가지 관점에 중점을 두었다. 첫째, 저위도 지역 자력자료의 자기극변환 시 문제가 되는 편각방향의 영상 왜곡을 고찰하고 이를 최소화하기 위한 여러 방법을 검토함으로써 최선의 결과를 도출하는 방안을 모색하였다. 둘째, 조사지역은 사전정보가 거의 없기 때문에 전통적인 자료처리 기법과 함께 geographic information system (GIS) 분야의 경사, 곡률 및 최대 경사면 방위각 등의 기법을 새로이 도입, 검토하였다. 이로부터 조사지역의 구조지질 정보를 도출하고 그 유용성을 확인하였다. 마지막으로, 오일러 곱풀기를 이용하여 자력이상대의 심도정보를 도출하고 앞서의 고찰결과와 종합하여 향후의 정밀 조사영역을 선정, 추천하였다. 본 연구에서 수행한 일련의 자료처리 과정은 국내는 물론 해외 자원개발에 있어서 적절한 지침이 될 수 있을 것으로 여겨진다.

Keywords

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