Browse > Article

Mineral Chemistry of Talc from Different Origins in the Dongyang Talc Deposit  

Shin Dongbok (한국지질자원연구원)
Lee Insung (서울대학교 지구환경과학부)
Koh Sang-Mo (한국지질자원연구원)
Publication Information
Journal of the Mineralogical Society of Korea / v.17, no.4, 2004 , pp. 357-364 More about this Journal
Abstract
Mineral chemistry of talc from the Dongyang talc deposits was studied to characterize the differences between dolomite-origin talc (talc I) and tremolite-origin talc (talc II). Average iron and aluminum contents are higher in talc II, 2.18 wt% FeO and 0.31 wt% $Al_2$O$_3$), than in talc I, 1.48 wt% FeO and 0.08 wt% $Al_2$O$_3$). Consistently lower Mg/(Mg+Fe+Mn) ratios and higher AI concentrations with uniform values of talc II compared to talc I seem to reflect the compositional differences of the original materials, tremolite and dolomite, respectively. Relative enrichment of Al as well as Fe in talc II compared to tremolite can be attributed to their immobile behaviors during alteration process and the rapid diffusion of hydrothermal fluids, which can accelerate instantaneous nucleation with immaturity growth of talc II. Increase in the concentrations of talc II can lower the ore grade by increasing concentrations of impure components such as AI and Fe, and by abundant presence of tremolite as well.
Keywords
talc; tremolite; mineral chemistry; Dongyang talc deposit;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Ahn, J.H., Lee, I., and Kim, J-M. (2000) High resolution transmission electron microscopy of tremolite-to-talc reaction at the Dongyang talc deposit. J. Mineral. Soc. Korea, 13, 84-95.
2 Kim, G.Y. (1997) Electron microscopic study on the talc mineralization in the Yesan-Gongju-Cheongyang area, Korea. Ph. D. thesis, Seoul Nat'l Univ., Seoul, (unpublished), 259p.
3 Reedman, H.H., Fletcher, C.J.N., Evans, R.B., Workman, D.R., Yoon, K.S., Rhyu, H.S., Jcong, S.W., and Park, J.N. (1973) Geology of the IIwanggangni mining district, Republic of Korea. Anglo-Korean Mineral Exploration Group, 1-118.
4 El-Sharkawy, M.F. (2000) Talc mineralization of ultramafic affinity in the Eastern Desert of Egypt. Mineral. Deposita, 35, 346-363.
5 Kim, H.S. and Cho, D.S. (1993) Genesis of talc deposits in the Chungju area, Korea. J. Petrol. Soc. Korea, 2, 95-103.
6 Moine, B., Fortune, J.P., Moreau, P., and Viguier. F. (1989) Comparative mineralogy, geochemistry and conditions of formation of two metasomatic talc and chlorite deposits: Trimouns (Pyrenees, France) and Rabenwald (Eastern Alps, Austria). Econ. Geol., 84, 1398-1416.
7 Robinson, P., Spear, F.S., Schurnacher, J.C., Laird, J., Klein, C., Evans, B.W., and Doolan, B.L. (1982) Phase relations of metamorphic amphiboles: natural occurrence and theory. In: Veblen, D.R. and Ribbe, P.II., eds., Amphiboles: Petrology and Experimental Phase Relations, Reviews in Mineralogy, 98, Mineralogical Society of America, 1-227.
8 Moon, H.S. and Kirn, S.T. (1988) The origin and mineralization of the Dongyang Talc Deposits. J. Korean Inst. Mining Geol., 21, 235-255.
9 Park, H.I., Lee, I.S., and Hur, S.D. (1995) Talc mineralization in the middle Ogcheon metamorphic belt (I): with emphasis of the stable isotope studies of the Dongyang talc deposit. Econ. Environ. Geol., 28, 635-646.
10 Kerrick, D.M., Lasaga, A.C., and Rateburn, S.P. (1991) Kinetics of heterogeneous reactions. In: D. M. Kerrick, ed, Contact Metamorphism, Reviews in Mineralogy, 26, 583-671.
11 Shin, D.B. and Lee, I.S. (2002) Carbonate-Hosted Talc Deposits in the Contact Aureole of Igneous Intrusion (Hwanggangri Mineralized Zone, South Korea): geochemistry, phase relationships, and stable isotope studies. Ore Geol. Rev. 22, 17-39.
12 Lee, J.H. (1987) Origin of talc deposits in the Chungju area; Origin and types of initial rocks and their origin. J. Geol. Soc. Korea, 23, 173-188.
13 Kim, O.J., Park, H.I., and Kiln, K.T. (1963) Report on geologic investigation of Dongyang talc deposit. Ilshin Industrial Co. Ltd. (unpublished), 40p.