A Study on the Geophysical Characteristics of the Coastal Area near Haenam Using Airborne and Shipborne Magnetic Survey

Hyosun Lee; Hyun-Key Jung; Sung-Ho Cho; Yesol Kim; Hyoungrea Rim

doi:10.32390/ksmer.2019.56.1.033

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2019 Vol.56, Issue 1 Preview Page Next Page

Research Paper

A Study on the Geophysical Characteristics of the Coastal Area near Haenam Using Airborne and Shipborne Magnetic Survey 항공 및 해상 자력탐사를 이용한 해남 근해의 지구물리학적 특성 연구

28 February 2019. pp. 33-43

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Abstract

Significant magnetic anomalies were found in the coastal area near Haenam using an airborne magnetic survey for verification of gravity anomalies near the Haenam gold mine. A shipborne magnetic survey which has high resolution was conducted to delineate the magnetic anomalies the airborne survey. The map derived from the shipborne magnetic survey shows a strong magnetic anomaly of more than ± 2,000 nT, with width of 4 km in the east-west direction. The magnetic anomaly curves imply that several small and big anomalous bodies are mixed in the subsurface. The strong anomaly is in the form of an isolation, which is attributed to an anomalous source, not to the effect of the bedrock. Various geophysical approaches are needed in the study area because, unlike land sites, we cannot investigate the surface.

Keywords

magnetic survey

magnetic anomaly

Haenam

airborne magnetic survey

shipborne magnetic survey

전남 해남지역에서의 중력이상을 규명하기 위하여 수행된 항공 자력탐사에서 해남 근해에 지자기이상이 발견되었다. 정밀 조사를 위한 해상 자력탐사를 수행하여 세밀한 총자기이상도를 획득하였다. 동서방향 폭 4km, ±2,000nT의 강한 지자기이상의 분포를 확인할 수 있었다. 측선별 지자기 이상도를 보면 이 일대 지자기 이상은 비교적 얕은 깊이의 소규모 이상대와 심부의 대규모 이상대 반응이 혼재되어 나타난다고 해석할 수 있다. 이는 고립된 형태의 강한 이상반응으로 그 원인이 기반암의 분포에 따른 영향이 아닌 이상반응원이 존재하는 것으로 해석 가능하다. 지자기이상이 규모가 크고 뚜렷하게 나타나고 있기 때문에 인근 육상과 같은 천열수광상 및 심부 반암동광상 등 대규모 광상의 가능성을 열어두고 추가적인 조사가 필요하다. 연구지역은 육상과는 달리 지표 조사가 불가능한 해상이기 때문에 다양한 지구물리학적 접근이 필요하다.

키워드

자력탐사

지자기이상

해남

항공 자력탐사

해상 자력탐사

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 56
No :1
Pages :33-43
Received Date : 2019-01-29
Revised Date : 2019-02-20
Accepted Date : 2019-02-22
DOI :https://doi.org/10.32390/ksmer.2019.56.1.033

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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