Geochronology and Metallogenesis of the Shapinggou Giant Porphyry Molybdenum Deposit in the Dabie Orogenic Belt
详细信息
- 责任者：Zhang Hong (Key Laboratory of Mineralogy and Metallogeny ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Sun Weidong
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(12)
- 关键词：斑岩钼矿床 ; porphyry molybdenum deposit ; 铀—铅计时 ; U-Pb dating ; 大别山 ; Dabie Mountains
- 页码：p.2039-2059
- 图表：10 illus., 4 tables, 63 refs.
- 分类号：1001
- 出版序号：20122445
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
The Shapinggou porphyry molybdenum deposit located in the western margin of the Dabie Mountains is the newly-discovered largest Mo deposit in China. It is part of the east extension of the Qinling-Dabie Mo mineralization belt. The main orebody is concealed with weak Mo mineralization. Mo deposits mainly occur in high-K granitic porphyry and quartz syenite. Field observation and drilling data reveal that Mo mineralization is closely related to collaspe of breccia. The geochemical data indicate granitic porphyry is characterized by acid, sub-alkaline, high K2O, low Na2O and Ca2O. Re-Os dating of molybdenite for the porphyry deposit yields an isochron age of (111.1±1.2) Ma.