Metallogenic Fluid Characteristic Study of the Fenghuangshan Cu Deposit at Tongling, Anhui Province

Abstract

Abstract:

This study takes the Fenghuangshan copper deposit as an example to examine the metallogenic mechanism, the nature and origin of oreforming fluid using the characteristics of metallogenic fluid and C, D and O isotope analysis. The Fenghuangshan deposit contains garnet, quartz and calcite in which fluid inclusions were well developed. The fluid inclusion can be classified into V-L type, V-L+S type, V-L rich gas type, and V type. Most of the fluid inclusions in garnet, quartz and calcite are concentrated mainly in three zones and the temperatures and salinity ranges of fluid inclusions represent three different phases of oreforming fluid evolution, indicating that the fluid experienced a continuous process of evolution, which was well coupled with metallogenic phases of the Fenghuangshan deposit. Temperature decreasing and fluid boiling resulted in the discharge of a large amount of copper from Cubearing fluid. Furthermore, H and O isotopic analysis indicates that the oreforming fluid consists mainly of magmatic water, with minor meteoric water at the late stage of mineralization of the Fenghuangshan deposit.

Key words: metallogenic fluid, stable isotope, skarntype Cu deposit, Fenghuangshan, Tongling, Anhui

CLC Number:

P618.41

JI Hong-Ying, FEI Rong-Fu, WANG Yong-Lei, LI Jin-Wen. Metallogenic Fluid Characteristic Study of the Fenghuangshan Cu Deposit at Tongling, Anhui Province[J]. Geoscience, 2010, 24(2): 228-236.

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