Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Occurrence of Placer Gold Deposits from the Takaoi Area of the Middle Kalimantan, Indonesia

인도네시아 중부 칼리만탄 따까오이 지역 사금광상의 산출상태

  • Kim In-Joon (Korea Institute of Geoscience and Mineral Resources) ;
  • Lee Jae-Ho (Korea Institute of Geoscience and Mineral Resources)
  • Published : 2006.04.01
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Abstract

Placer gold deposits is mainly distributed in the Takaoi area. The alluvium is unconsolidated or semiconsolidated deposit consisting of gravel, sand, and soil beds in ascending order. They unconformably overlies the Carboniferous-Permian schist and Cretaceous granodiorite substratum. Based on detailed facies analysis, the alluvium can be interpreted as a typical fluvial deposits containing gravel and sand beds of channel-fill unit and soil deposit of floodplain. Gold grains are included mainly in the gravel bed and vein quartz is only contained gold among all kinds of gravels. These features indicates that the source rock of the gold grain is vein quartz and gold grains are separated from vein quartz during transport and abrasion. The reserves of gold in this area reach to at least 792 kg.

사금광상은 주로 따까오이 지역에 분포한다. 충적층은 미고화 또는 반고화된 자갈층, 사질층과 토양층으로 구성된다. 이들은 석탄기-페름기 편암과 백악기 화강섬록암위에 부정합으로 놓인다. 상 분석에 의하면 충적층은 하도 충진의 자갈과 모래 퇴적광상 및 범람원 토양광상을 포함하는 전형적인 하성퇴적광상으로 사료된다. 금 입자는 주로 자갈층 내에 함유되어 있으며, 자갈층을 구성하는 역들 중에서 석영맥 기원의 역들만이 금을 함유하고 있다. 이러한 양상은 원암이 석영맥이었고, 이동과 삭박작용 동안 석영맥으로부터 금입자가 분리되었음을 지시한다. 이 지역에서의 금 매장량은 최소 792kg에 달한다.

Keywords

References

  1. 김상규 (1999) 토질역학 ( 이론과 응용 ). 보문각 P.13-23
  2. Barrick Co. Ltd. (1997) Photogeological interpretation of north and south blocks. Masupa Ria area, Kalimantan, 453p
  3. Bugg, S., Rafferty, W. and Kerr, J. (1998) Report on SIPP Activities for Period March 1996-July 1997: Final Report Kuala Kurun Project, South Block(DU 1671), Unpublished Report to Barrick Gold Corp., 25p
  4. Carlisle, J. C. and Mitchell, A. G. H. (1995) Magmatic Arc and Associated Gold and Copper Mineralization in Indonesia. In: Mineral Deposits of Indonesia - Discoveries of the Past 25 Tears. J. Geochem. Explor., v. 50, p. 91-142
  5. Hamilton, W (1979) Tectonics of the Indonesian region. USGS Prof. Paper 1078, 345p
  6. JlCA (1979) The report on geological survey of central Kalimantan. 308p
  7. Margono, U., Sujitno, T. and Santosa, T. (1995) Geological map of the Tumbanghiram Quadrangle, Kalimantan (1:250,000). Geological Research and Development Center (GRDC)
  8. Miall, A. D. (1985) Architectural element analysis: a new method of facies analysis applied to fluvial deposits. In: Flores, R. M. et al., Eds., Recognition of Fluvial Depositional Systema and Their Resources Potential. Soc. Econ. Paleont. min., No. 19, p. 33-81
  9. Ministry of Mines Indonesia, GSI, JICA-MMAJ (1977) Report on Geological Survey of Central Kalimantan, Phase I and II, Landsat-Data Analysis, Aerial photography and Airborne Magnetic Survey
  10. Ministry of Mines Indonesia, GSI, JICA-MMAJ (1978a) Report on Geological Survey of Central Kalimantan, Phase II 1-2 and Phase Ill 1-2, Aerial Photography and Airborne Magnetic Survey
  11. Ministry of Mines Indonesia, GSI, JICA-MMAJ (1978b) Report on Geological Survey of Central Kalimantan, Phase IV 1, Photo Geological Survey
  12. Ministry of Mines, Directorate General of Mines Indonesia GSI, JICA-MMAJ (1979) Report on Geological Survey of Central Kalimantan, Phase IV 2, Geological Survey
  13. Simpson, M.P. (1996) Petrographic, XRD and fluid inclusion study of 12 samples from the Tajungan and Teluk prospects, Kalimantan. Terry Leach & Co. Report 96099
  14. Suetrisno, Supriatna, S., Rustandi, E. and Sanyoto, P. (1994) Geological map of the Buntok Quadrangle, Kalimantan(1:250,000). Geological Research and Development Center(GRDC)
  15. Sumartadipra A. S. and Margono, U. (1996) Geological map of the Tewah Quadrangle, Kalimantan (1:250,000). Geological Research and Development Centre (GRDC)
  16. Supriatna, S., Sudradjat, A. and Abidin, H. Z. (1995) Geological map of the Muarotewe Quadrangle, Kalimantan (1:250,000). Geological Research and Development Center (GRDC)