Genetic Differences of Two Asbestos Mines, Boryoung Area

보령지역 두 석면광산의 성인 차이

  • Received : 2013.03.07
  • Accepted : 2013.04.17
  • Published : 2013.04.28


This study is for the genetic differences of two closed asbestos mines from Jeongjeon and Ocheon areas in Boryoung, Chungnam. They are mined asbestos for past several decades. Host rocks are serpentinites for Jeongjeon mine and dolomites for Ocheon mine. Asbestos samples and their host rocks are collected from the field trips and examined with microscopes and FESEM, and analysed with XRD and EDX to confirm for the type and/or compositions of the minerals. The asbestos occur as layers, cracks and fractures assummed as a pathway of the hydrothermal water, but show different characteristics. The serpentinites from the Jeongjeon mine contain chrysotile, tremolite and actinolite asbestos. Non-asbestos minerals including tremolite and actinolite were also found. The chrysotiles occur as a cross fiber or slip fiber at veins and along cracks of several mm to cm thickness. Tremolite and actinolite asbestos occur along cracks and fractures of several cm to ten cm thickness. It suggests that the asbestos from Jeongjeon area were formed by the reactions between serpentinite and hydrothermal water. The dolomites of the Ocheon mine only contain tremolite and actinolite asbestos. The asbestos occur along layers, cracks and fractures, suggestive of asbestos from Ocheon area formed by the reactions between dolomite and hydrothermal waters influxed along layers, cracks and fractures. Overall results suggest that two asbestos mines showing different host rocks are located in a Boryoung area. They show a different type of asbestos minerals, reflecting variety of petrogeneses.


serpentinite;dolomite;chrysotile;tremolite;actinolite;hydrothermal water


  1. Bates, R.L. and Jackson, J.A. (1980) Glossary of Geology. American Geological Institute, Virginia, 749p.
  2. Churchill, R.K. and Hill, R.L. (2000) A general guide for ultramafic rocks in California - areas more likely to contain naturally occurring asbestos: Department of Conservation, Division of Mines and Geology, Open- File Report 2000-19 (map, 1:1,100,000 scale).
  3. Deer, W.A., Howie, R.A. and Zussman, J. (1997) Rockforming minerals, Volume 2B - Double-chain silicates. London, The Geological Society, 764p.
  4. Ehlers, E.G. and Blatt, H. (1982) Igneous, sedimentary and metamorphic petrology. Freeman and company, 732p.
  5. International Union of Geological Sciences (1973) Plutonic rocks -classification and nomenclature recommended by the IUGS subcommission on the systematics of igneous rocks. Geotimes, v.18, p.26-30.
  6. Le Bas, M.J. and Streckeisen, A.L. (1991) The IUGS systematics of igneous rocks. Journal of the Geological Society of London, v.148, p.825-833.
  7. Lee, B.J., Kim, D.H., Choi, H.I., Kee, W.S. and Park K.H. (1996) 1: 250,000, Explanatory note of the Daejeon sheet. The Ministry of Science and Technology.
  8. Mevel, C., Canat, M., Gente, P., Marion, E., Auzende, J.M. and Karson, J.A. (1991) Emplacement of deep crustal and mantle rocks on the West median valley, Wall of the mark area (MAR), $23^{\circ}$ N. Tectonophy., v.190, p.31-53.
  9. Na, K.C., Kim, H.S. and Lee, S.H. (1982) Stratigraphy and Metamorphism of Seosan group. J. Kore. Inst. Mining Geology, v.15, p.33-39.
  10. Perkins, R.L. and Harvey, B. W.(1993) Test method. Method for the Determination of Asbestos in Bulk Building Materials. (Test Method). Environmental Protection Agency Office of Research and Development, EPA/600/R-93/116
  11. O'Hanley, D.S. (1996) Serpentinites; Records of Tectonic and Petrological History. Oxford University Press. Inc., New York, 277p.
  12. Raymond, L.R. (2002) The study of Igneous, Sedimenrary and Metamorphic rocks. Mc Graw Hill, New York, 720p.
  13. Son, C.M. (1971) On the Pre-Cambrian Stratigraphy of Eastern Asia. J. Kore. Inst. Mining Geology, v.4, p.19-32.
  14. Turner, F.J. (1981) Metamorphic petrology(2nd ed.). McGraw-Hill Co, 524p.
  15. You, K.M. and Woo, K.S. (2002) Sedimentary rock(in Korea). Korean Studies Information, 494p.
  16. Zoo, S.H., Jin, M.S., Youn, H.S. and Kim, D.H. (1982) A Research of Rb/Sr Afe dating. Korea Institute of Energy and Resources, A Report of Investigation and Research, v.13, p.193-208.

Cited by

  1. Mineralogical Characteristic and Occurrence of Tremolite and Actinolite in the Dong-A mine, Korea vol.28, pp.4, 2015,
  2. Occurrences of Asbestos within Gapyeong Serpentinite Mines and Characteristics of Host Rocks vol.26, pp.3, 2016,