Isotopic Constraint of S-H-O on Ore-Forming Fluids Origin of the Congjiang-Nage Cu Multiple-Metallic Ore Deposit, Southeast Guizhou Province
详细信息
- 责任者：Yang Dezhi (China University of Geosciences ; Wuhan 430074 ; China) ; Zhou Jiaxi
- 刊名：Geology and Prospecting
- 出版年：2010
- 卷期：46(3)
- 关键词：铜矿 ; copper ores ; 贵州 ; Guizhou Province
- 页码：p.455-461
- 图表：6 illus., 2 tables, 33 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
The Nage Cu multiple-metallic ore deposit is located in the transitional zone of the Yangtze craton and Cathaysia, which is the southwest of Jiangnan orogenic belt, and is a representative ore deposit of this region. Isotopic geochemistry of S, H and O is analyzed in this paper to help understand the sources of the ore-forming fluids. The δ34 SV-CDT values of the ores sulfides show a total range from -2.7‰ to 2.8‰, the average value is 0.1‰, and most of them are between -2.5‰ and 2.5‰, indicating that the sulfur should be originated from the mantle material. The δDV-SMOW and δ18OH2O values of the gangue quartz inclusion range from -60.7‰ to -44.4‰ and from 7.9‰ to 9.0‰, respectively. In the diagram of δD versus δ18O, all samples fall into the region of magmatic and/or metamorphic water, which means that the ore-forming fluids were provided by the mantle and/or the hosted-metamorphic sedimentary rocks. This work suggests that the mineralization fluids of this deposit have a characteristic of multiple sources.
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