Source of Metallogenic Materials and Ore-Forming Fluids, and Metallogenic Mechanism of the Yuanzhuding Porphyry Cu-Mo Deposit, Western Guangdong Province, South China
详细信息
- 责任者：Chu Kelei (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Mao Jingwen
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(5
- 关键词：斑岩铜矿床 ; porphyry copper deposit ; 斑岩钼矿床 ; porphyry molybdenum deposit ; 广东 ; Guangdong
- 页码：p.115-125
- 图表：8 illus., 4 tables, 39 refs.
- 分类号：1001
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
The Yuanzhuding Cu-Mo porphyry deposit,located at the southwest of the Qin-Hang Neoproterozoic suture,is a newly discovered large-scale Cu-Mo deposit in the metallogenic belt.Based on a detailed analysis of geological characteristics and a study of H,O,S,and Pb isotopic geochemistry,the features of fluid evolution and the origin of the ore-forming fluid of the deposit has been discussed preliminarily in this paper.The results show that the sulfur came mainly from the ore-forming magma and theδ34 S values of sulfide in the ore distributed in a range between-4.3‰-3.9‰.The ore has a stable isotopic composition composed of common lead.Considering the Metallogenic geodynamics background,the Yuanzhuding deposit mineralization was closely related to a magmatic activity,and was originated from the mixing of the crust and mantle material triggered by the subduction.According to the alteration of H and O isotope composition in different ore-forming stage and the existing fluid inclusion studies, it is suggested that the mixing between meteoric water and the hydrothermal fluid of ore-bearing magma is the key factor that caused the Yuanzhuding metallic minerals precipitated out of the ore-forming fluids.
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