Econ. Environ. Geol. 2012; 45(6): 623-641

Published online December 31, 2012

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Element Dispersion by the Wallrock Alteration of Janggun Lead-Zinc-Silver Deposit

Bong Chul Yoo

Mineral Resources Department, Korea Institute of Geoscience and Mineral Resources

Correspondence to :

Bong Chul Yoo

chbong@kigam.re.kr

Received: August 6, 2012; Accepted: December 7, 2012

Abstract

The Janggun lead-zinc-silver deposit is hydrothermal-metasomatic deposit. We have sampled wallrock, hydrothermaly-altered rock and lead-zinc-silver ore vein to study the element dispersion during wallrock alteration. The hydrothermal alteration that is remarkably recognized at this deposit consists of rhodochrositization and dolomitization. Wallrock is dolomite and limestone that consisit of calcite, dolomite, quartz, phlogopite and biotite. Rhodochrosite zone occurs near lead-zinc-silver ore vein and include mainly rhodochrosite with amounts of calcite, dolomite, kutnahorite, arsenopyrite, pyrite, chalcopyrite, sphalerite, galena and stannite. Dolomite zone occurs far from lead-zinc-silver ore vein and is composed of mainly dolomite and minor calcite, rhodochrosite, pyrite, sphalerite, chalcopyrite, galena and stannite. The correlation coefficients among major, trace and rare earth elements during wallrock alteration show high positive correlations(dolomite and limestone = Fe2O3(T)/MnO, Ga/MnO and Rb/MnO), high negative correlations(dolomite = MgO/MnO, CaO/MnO, CO2/MnO, Sr/MnO; limestone = CaO/MnO, Sr/MnO). Remarkable gain elements during wallrock alteration are Fe2O3(T), MnO, As, Au, Cd, Cu, Ga, Pb, Rb,Sb, Sc, Sn and Zn. Remarkable loss elements are CaO, CO2, MgO and Sr. Therefore, elements(CaO, CO2, Fe2O3(T), MgO, MnO, Ga, Pb, Rb, Sb, Sn, Sr and Zn) represent a potential tools for exploration in hydrothermalmetasomatic lead-zinc-silver deposits.

Keywords Janggun lead-zinc-silver deposit, wallrock alteration, element dispersion, gain/loss, pathfinder

Article

Econ. Environ. Geol. 2012; 45(6): 623-641

Published online December 31, 2012

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Element Dispersion by the Wallrock Alteration of Janggun Lead-Zinc-Silver Deposit

Bong Chul Yoo

Mineral Resources Department, Korea Institute of Geoscience and Mineral Resources

Correspondence to:

Bong Chul Yoo

chbong@kigam.re.kr

Received: August 6, 2012; Accepted: December 7, 2012

Abstract

The Janggun lead-zinc-silver deposit is hydrothermal-metasomatic deposit. We have sampled wallrock, hydrothermaly-altered rock and lead-zinc-silver ore vein to study the element dispersion during wallrock alteration. The hydrothermal alteration that is remarkably recognized at this deposit consists of rhodochrositization and dolomitization. Wallrock is dolomite and limestone that consisit of calcite, dolomite, quartz, phlogopite and biotite. Rhodochrosite zone occurs near lead-zinc-silver ore vein and include mainly rhodochrosite with amounts of calcite, dolomite, kutnahorite, arsenopyrite, pyrite, chalcopyrite, sphalerite, galena and stannite. Dolomite zone occurs far from lead-zinc-silver ore vein and is composed of mainly dolomite and minor calcite, rhodochrosite, pyrite, sphalerite, chalcopyrite, galena and stannite. The correlation coefficients among major, trace and rare earth elements during wallrock alteration show high positive correlations(dolomite and limestone = Fe2O3(T)/MnO, Ga/MnO and Rb/MnO), high negative correlations(dolomite = MgO/MnO, CaO/MnO, CO2/MnO, Sr/MnO; limestone = CaO/MnO, Sr/MnO). Remarkable gain elements during wallrock alteration are Fe2O3(T), MnO, As, Au, Cd, Cu, Ga, Pb, Rb,Sb, Sc, Sn and Zn. Remarkable loss elements are CaO, CO2, MgO and Sr. Therefore, elements(CaO, CO2, Fe2O3(T), MgO, MnO, Ga, Pb, Rb, Sb, Sn, Sr and Zn) represent a potential tools for exploration in hydrothermalmetasomatic lead-zinc-silver deposits.

Keywords Janggun lead-zinc-silver deposit, wallrock alteration, element dispersion, gain/loss, pathfinder

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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