Characteristics of Ore-Forming Fluid and Metallogenesis of the Tongkengzhang Porphyry Molybdenum Deposit, Jiangxi Province
详细信息
- 责任者：Sun Jia (Faculty of Sciences and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Mao Jingwen
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(1)
- 关键词：斑岩钼矿床 ; porphyry molybdenum deposit ; 成矿流体 ; ore-forming fluids ; 成矿作用 ; metallogenesis ; 江西 ; Jiangxi Province
- 页码：p.91-104
- 图表：9 illus., 1 table, 36 refs.
- 分类号：1001
- 出版序号：20130247
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Tongkengzhang molybdenum deposit is a newly discovered deposit,which is mainly hosted by the Cretaceous granitic porphyry. Based on mineral assemblage and vein crosscutting relationships, the ore-forming process could be divided into three mineralization-alteration stages. The study of fluid inclusions shows that early ore-forming fluids are high salinity magmatic fluids,containing alkalic components and volatile phase, which formed in condition of high pressure (～1 000 bar)and high temperature (550～>600 ℃), and were separated to multiphase high salinity fluid inclusions and lower salinity vapor-rich fluid inclusions by boiling. Meanwhile, the Laser Raman and SEM measurements detected Fe2O3, SO2 in the early fluids, indicating the early fluids were highly oxidized, the abundance of K-feldspar suggests alkalic environment.
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