Research on Characteristics of Ore-Forming Fluids of Dahongshan Copper Ore Deposit

Ming Guo Deng; Chang Liang Lv; Lei Zeng

doi:10.4028/www.scientific.net/AMR.734-737.1014

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Research on Characteristics of Ore-Forming Fluids of Dahongshan Copper Ore Deposit

Abstract:

This paper analyzes the fluid inclusions, micro-thermometry, the pressure, salinity and pH of ore-forming solution, and isotopes of H and O, C and O of the Dahongshan copper deposit in Yunnan Province. The result shows that these inclusions are dominated by liquids (L_H2O), gases and liquids (L_H2O+V_H2O), and daughter mineral-bearing (L_H2O+V_H2O+S_NaCl) three-phase ones and the liquid inclusion accounts for about 50%, and the liquid composition mainly include Na⁺,K⁺,F^-,Cl^-. Homogenization temperatures at the early stage vary from 290°C to 330°C, with the peak value around 350°C, while at the late stage the figures vary from 160°C to 250°C, with the peak value 250°C. The general salinity ranges from 16.0 wt% to 35.9wt%, and the maximum reaches 45wt%. The value of δ¹⁸O_H2O and δD in the mineral inclusion ranges from-1.15% to 6.61% and from-58% to-78% respectively. These isotopic data imply that the ore-forming fluids were mainly derived from the magmatic water, the metamorphic water and the meteoric water.

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Periodical:

Advanced Materials Research (Volumes 734-737)

Pages:

1014-1017

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.734-737.1014

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Online since:

August 2013

Authors:

Ming Guo Deng*, Chang Liang Lv, Lei Zeng

Keywords:

Carbon-Hydrogen-Oxygen-Sulfur Stable Isotope, Dahongshan Copper Ore Deposit, Fluid Inclusion, Ore-Forming Fluids, Yunnan

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