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

All Issue

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

PDF XML

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

References

Bowden, C.D., 2007. Epithermal systems of the Seongsan district, South Korea, James Cook University of North Queensland: Ph. D. Thesis, James Cook University.

Boyce, J., Pozza, M., and Morris, B., 2001. High-resolution magnetic mapping of contaminated sediments in urbanized environments. The Leading Edge, 20(8), 886-895.

10.1190/1.1487301

Chi, S.J., Kang, I.M., Koh, S.M., Ko, I.S., Kim, S., Kim, Y.U., Kim, E.J., Kim, I.J., Kim, T.K., Kim, H., Ryoo, C.R., Park, G., Park, S., Park, J.T., Bae, K.H., Sohn, J., Yang, D., Oh, H.J., Yoo, B.C., Yoon, S.J., Lee, G., Lee, D.K., Lee, B.H., Jo, Y., Jin, K.M., Hong, Y.K., and Seo, J.R., 2011. Technical Development on the Life Cycle of the Haenam Epithermal Gold Mineralized Area and Hydrothermal Clay Resources, KIGAM Report.

Choi, S.Y., Kim, C.H., Park, C.H., and Kim, H.R., 2014. A geophysical study on spreading ridges and hydrothermal deposits in the north fiji basin using sea-surface magnetic and bathymetry data. J. the Geological Society of Korea, 50(5), 627-641.

10.14770/jgsk.2014.50.5.627

Hwang, J., 2018. Status and planning of the project for producing the basic maps of the sea, 2018 Fall Joint Conference of the Geological Science in Korea, Gyeongju, p.27.

Jung, H.K. 2011. A study on the geophysical characteristics of epithermal ore deposit area in Hwasan-myeon, Haenam, 2011 Spring Joint Conference of the Geological Science, Mokpo, p.208-209.

21538240

Jung, H.K., Rim, H., Lim, M., Yi, M.J., Son, J.S., Bang, E.S., Kim, C., Park, Y.S., Chi, S.J., Shin, Y.H., Sung, N.H., Ko, I.S., Choi, J.H., Lee, H.Y., Cho, S.H., and Lee, H., 2012. Integrated Geophysical Exploration in Haenam Area, KIGAM Report.

Jung, H.K., Koo, S.B., Kim, K.E., Kim, C., Park, S., Park, C., Park, Y.S., Bang, E.S., Park,I.H., Sung, N.H., Son, J.S., Shin, J., Yi, M.J., Lee, S.K., Lim, M., Rim, H., Jung, Y.B., Cheon, D.S., Hwang, S., Choi, J.H., Lee, H.Y., Cho, S.H., and Lee, H., 2011. USN based geophysical exploration system for mineral exploration, KIGAM Report.

Jung, H.K. Rim, H., Cho, S.H., Lee, H., Lee, H.Y., and Lim, M., 2010. Preliminary data processing of airborne and marine survey data for epithermal ore deposit area in Haenam, 2010 Fall Conference of the Korean Society of Mineral and Energy Resources Engineers, Busan, p.79-81.

PMC2916154

Jung, H.K., 2009. A case study of geophysical exploration for epithermal ore deposit in Hwasan-myeon, Haenam, 2009 Spring Joint Conference of the Geological Science, Busan, 181p.

Jung, H.K., Rim, H., Kim, C., Cho, S.H., and Lee, H., 2011. A study on investigation of geophysical anomaly in Hwasan-myeon, Haenam, 2011 Fall Conference of the Korean Society of Mineral and Energy Resources Engineers, Kangwon, p.48-50.

Kang, J.H., Lee, D.S., Ryoo, C.R., Koh, S.M., and Chi, S.J., 2011. Geological structure of the Moisan epithermal Au-Ag Mineralized zone, Haenam and its tectonic environment at the time of the mineralization. Economic and Environmental Geology, 44(5), 413-431.

10.9719/EEG.2011.44.5.413

Kim, C.H. and Park, C.H., 2010. A Study on Geophysical characteristics and regional geological structures of the southwestern yellow sea of korea using gravity and magnetic data. J. the Korean Earth Science Society, 31(3), 214-224.

10.5467/JKESS.2010.31.3.214

Kim, H.S., Jung, M.S., Kim, C.H., Kim, J.U., and Lee, K.Y., 2008. The exploration methodology of seafloor massive sulfide deposit by use of marine geophysical investigation. Geophysics and Geophysical Exploration, 11(3), 167-176.

Kim, I.J. and Nagao, K., 1992. K-Ar ages of the hydrothermal clay deposits and the surrounding igneous rocks in southwest Korea. Jour. Petrol. Soc. Korea, 1(1), 58-70.

Koh, S.M., 1996. Geochemical Characteristics of the Cretaceous Volcanic Rocks and Bukok Hydrothermal Deposit in the Haenam Volcanic Field, Chollanamdo, Korea, M.Sc. Thesis, Seoul National University.

Kwon, B.D., Joo, J.A., and Kwon, J.H., 1992. A study on the fault zone using gravity survey in Muan and Haenam area. J. the Korean Earth Science Society, 13(3), 398-398.

Lim, M., Park,Y.S., Koo, S.B., Shin, Y.H., Rim, H., Sung, N.H., Jung, H.K., Kim, K.E., Ko, I.S., Park, G., and Kwak, B., 2010. Regional Geophysical Mapping, KIGAM Report.

Lim, M., Lee, Y.S., Kang, H.C., Kim, J.Y., and Park, I.H., 2001. Palaeomagnetic Study on Cretaceous Rocks in Haenam Area. Econ. Environ. Geol., 34(1), 119-131.

Park, C.H., Huh, S., Jou H.T., Hong, J.K., Han, S.J., and Isezaki, N., 1997. Geological interpretations based on magnetic anomalies and seismic data offshore Yangyang–Samchuk, the Sea of Korea. J. the Geological Society of Korea, 33(3), 117-126.

Park, G.S., Choi, J.K., Koo, J. M., and Kwon, B.D., 2009. Analysis of a structure of the kunsan basin in yellow sea using gravity and magnetic data. J. the Korean Earth Science Society, 30(1), 49-57.

10.5467/JKESS.2009.30.1.049

Park, Y.S., 1988. A Study on Airborne Radiometric and Magnetic Survey, KIGAM Report.

Ponce, D.A., Denton, K.M., and Watt, J.T., 2016. Marine magnetic survey and onshore gravity and magnetic survey, San Pablo Bay, Northern California (No. 2016-1150). US Geological Survey.

Rim, H., Jung, H.K., Cho, S.H., and Choi, J.H., 2011. Application of coastal area gravity survey on SEP barge using continuos measurements, 2011 Spring Joint Conference of the Geological Science, Mokpo, p.288-289.

Sliter, R.W., Triezenberg, P.J., Hart, P.E., Watt, J.T., Johnson, S.Y., and Scheirer, D.S., 2009. High-resolution seismic-reflection and marine magnetic data along the hosgri fault zone, Central California (No. 2009-1100). US Geological Survey.

Weiss, E., Ginzburg, B., Cohen, T.R., Zafrir, H., Alimi, R., Salomonski, N., and Sharvit, J., 2007. High resolution marine magnetic survey of shallow water littoral area. Sensors, 7(9), 1697-1712.

10.3390/s709169728903191PMC3841840

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 EngineersISSN:2288-0291(Print) 2288-2790(Online)한국자원공학회

All Issue