Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
권호 표지
DOI QR코드

DOI QR Code

Occurrences of Sepiolites within a Seosan Group, Western Part of Chungnam

충남 서부 서산층군 내 해포석의 산출

  • Song, Suckhwan (Department of Civil Engineering, Joongbu University) ;
  • Lim, Koju (Indoor Environment and Noise Division, National Institute of Environmental Research) ;
  • Lee, Wooseok (Indoor Environment and Noise Division, National Institute of Environmental Research)
  • 송석환 (중부대학교 토목공학과) ;
  • 임호주 (국립환경과학원 생활환경연구과) ;
  • 이우석 (국립환경과학원 생활환경연구과)
  • Received : 2013.04.07
  • Accepted : 2013.04.17
  • Published : 2013.04.28
Download PDF
⟨ Previous Next ⟩

Abstract

This study examines the mineralogy of sepiolites occurred within the carbonaceous rocks of Songak schist and Pyeongtaek migmatitic gneiss of Precambrian Seosan group, in the western part of Chungnam. Host rocks of the sepiolite were dolomitic rocks and have experienced hydrothermal alteration and metamorphism. Mesozoic granite is assumed as a main source of hydrothermal alteration for the dolomitic rocks. Some of the tremolite asbestos coexist with the sepiolites. Representative sepiolite and tremolite samples were collected from the layers cracks or fractures of the dolomitic rocks and/or examined with microscope with microscope, XRD, SEM and TEM. Sepiolites are mainly recognized along the cracks assumed as pathways of hydrothermal solution. Tremolites are mainly found at layers or cracks of the dolomitic rocks and occur as asbestos as well as non-asbestos forms. It was confirmed that some of the tremolite asbestos were coexisted with the sepiolites. Overall results suggest that the occurrences of sepiolites within the dolomitic rocks mainly result in the hydrothermal alteration and the fluid from the acidic rocks, possibly granites. It also suggests that coexisting tremolite asbestos were formed by similar geological environment.

본 연구는 충남 서부 서산 층군 내 송악 편암 층과 평택 혼성 편마암 층내에서 산출되는 해포석의 산출 및 이의 광물학적 조사에 대해서이다. 해포석의 모암은 백운암질암이고 열수 변질 및 변성 작용의 영향을 받았다. 중생대 화강암류가 백운암질 석회암 열수 변질의 주요 근원으로 예상된다. 일부의 투각섬석 석면이 해포석과 같이 공존한다. 대표적인 해포석 및 투각섬석 시료들이 엽리, 균열, 열극에서 채취되었고, 이러한 시료는 편광현미경, XRD, SEM, TEM으로 관찰, 분석되었다. 해포석은 주로 열수의 통로로서 추측되는 균열을 따라 산출되며, 투각섬석은 주로 백운암질암의 엽리 및 열극을 따라 산출되고 석면형 또는 비석면형으로서 산출된다. 일부의 해포석은 투각섬석 석면과 공존하며 산출되는 것으로 확인되었다. 전체적인 결과 들은 연구 지역의 백운암질암 내 해포석은 화강암류와 같은 산성암체로부터 유입된 열수 작용에 의해 형성되었으며, 해포석과 공존하는 투각섬석도 해포석의 형성과정과 유사한 지질환경에서 형성되었음을 암시한다.

Keywords

References

  1. Alvarez, A. (1984) Sepiolite: properties and uses. In: Singer, A., Galan, E. Eds., Palygorskite-Sepiolite. Occurrences, Genesis and Uses. Elsevier, Amsterdam, p.253-287.
  2. Brauner, K. and Preisinger, A. (1956) Structur und Entstehung des Sepioliths. Tschermaks Mineral. Petrog. Mitt., v.6, p.120-140 (in German). https://doi.org/10.1007/BF01128033
  3. Brindley, G.W. (1959) X-ray and electron diffraction data for sepiolite. Amer. Mineral., v.44, p.495-500.
  4. Choi. S.H., Lee, J.H. and Cho, S.H. (2010) A study on the sepiolite from the dolomite mine, Jangsu, Jeonbuk. Petrological Society of Korea and Mineralogical Society of Korea, Annual Joint Conference, p.27-28.
  5. Chung, Y.H, Han J.H, Sung J.H. and Yu, I.J. (2006) A Respiratory Toxicity Study of Sepiolite in Sprague-Dawley Rats. J. Toxicol. Pub. Health, v.22, p.237-244.
  6. Ehlmann, A.J., Sand, L.B. and Regis, A.J. (1962) Occurrences of sepiolite in Utah and Nevada. Economic Geology, v.57, p.1085-1094. https://doi.org/10.2113/gsecongeo.57.7.1085
  7. Galan, E. and Ferrero, A. (1982) Palygorskite-sepiolite clay of Lebrija, southern Spain. Clays and Clay Minerals, v.30, p.191-199. https://doi.org/10.1346/CCMN.1982.0300305
  8. Galan, E. (1996) Properties and applications of Palygorskite -sepiolite clays. Clay Minerals, v.31, p.443-453. https://doi.org/10.1180/claymin.1996.031.4.01
  9. Garcia-Romero, E. and Suarez, M. (2010) On the chemical composition of sepiolite and palygorskite. Clays and Clay Minerals, v.58, p.1-20. https://doi.org/10.1346/CCMN.2010.0580101
  10. Giustetto, R., Levy, D., Wahyudi, O., Ricchiardi, G. and Vitillo, J.G. (2011) Crystal structure refinement of sepiolite/indigo Maya Blue pigment using molecular modelling and synchrotron diffraction. European Journal of Mineralogy, v.23, p.449-466. https://doi.org/10.1127/0935-1221/2011/0023-2105
  11. Hay R.L., Hughes R.E., Kyser T.K., Glass H.D. and Liu J. (1995) Magnesium-rich clays of the Meerschaum mines in the Amboseli basin, Tanzania and Kenya. Clays and Clay Minerals, v.43, p.455-466. https://doi.org/10.1346/CCMN.1995.0430409
  12. Hayashi, H., Otsuka, R. and Imai, N. (1969) Infrared study of sepiolite and palygorskite on heating. The American Mineralogist, v.53, p.1613-1624.
  13. Hillier, S. (2003) Clay Mineralogy, in GV Middleton, MJ Church, M Coniglio, LA Hardie, and FJ Longstaffe eds., Encyclopaedia of sediments and sedimentary rocks: Kluwer Academic Publishers, Dordrecht., p.139-142.
  14. Hwang, J.Y. (1991) Mineralogy of Sepiolite from the ulsan serpentine mine. J. Miner. Soc. Korea, v.4. p.108-118.
  15. Kim, D.H., Choi, W.C. and O, I.S. (1979) 1: 50000 Geological map of the Asan sheet. Korea Research Institute of Geoscience and Miner Resources.
  16. Lee, S.M., Kim, H.S., Na, K.C. and Park, B.Y. (1989) 1:50000 Geological map of the Tangjin -Changgohang. Korea Institute of Energy and Resources.
  17. Mclean S.A., Allen, B.L. and Craig, J.R. (1972) The occurrence of sepiolite and attapulgite on the southern high plains. Clays and Clay Minerals, v.20, p.143- 149. https://doi.org/10.1346/CCMN.1972.0200305
  18. Nagata, H., Shimoda, S. and Sudo, T. (1974) On dehydration of bound water of sepiolite. Clays and Clay Minerals, v.22, p.285-293. https://doi.org/10.1346/CCMN.1974.0220310
  19. Song, S.H., Hwang, J.H., Hwang, B.G. and Kim, H.W. (2008) Occurrence types and mineralogical characteristics of asbestos for the Kwangcheon area, Chungnam. Korean Industrial Hygiene Association, v.18, n.4, p.271-281.
  20. Takatsugu, M. Ryo, M., Yukio, K., Nobuaki, K. and Norihiko, K. (2004) Method of Quantitative Analysis for Fibrous Tremolite Contaminated in Long Fiber Sepiolite. Journal of the Clay Science Society of Japan, v.43, p.192-196.
  21. Warheit, D.B., Sayes, C.M., Frame, S.R. and Reed, K.L. (2010) Pulmonary exposures to Sepiolite nanoclay particulates in rats: Resolution following multinucleate giant cell formation. Toxicology Letters, v.192, p.286-93. https://doi.org/10.1016/j.toxlet.2009.11.006
  22. Yalcin, H. and Bozkaya, O. (2004) Ultramafic rock -hosted vein sepiolite occurrences in the Ankara ophiolitic melange, Central Anatolia, Turkey. Clays and Clay Minerals, v.52, p.227-239. https://doi.org/10.1346/CCMN.2004.0520209
  23. Yalcin, H. and Bozkaya, O. (2006) Mineralogy and geochemistry of Paleocene ultramafic- and sedimentary- hosted talc deposits in the southern part of the Sivas Basin, Turkey. Clays and Clay Minerals, v.54, p.333-350. https://doi.org/10.1346/CCMN.2006.0540305
  24. YENIYOL, M. (1992) Geology, mineralogy and genesis of YENIDOGAN (SIRIHISAR) sepiolite deposit. Mineral Res. Expl. Bull., v.114, p.51-64.