Geological Characteristics and Molybdenite Re-Os Isotopic Dating of Qianfanling Quartz-Vein Mo Deposit in Songxian County，Western Henan Province
详细信息
- 责任者：Gao Yang (China University of Geosciences ; Beijing 100083 ; China) ; Li Yongfeng
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(3)
- 关键词：钼矿 ; molybdenum ores ; 铼—锇计时 ; Re-Os dating
- 页码：p.757-767
- 图表：9 illus., 1 table, 55 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The host rocks of the deposit are Paleoproterozoic andesitic volcanic rocks of the Xiong’ er Group．The orebodies occur as molybdenite-quartz veins and the major ore type is quartz-vein type．The main metallic minerals are molybdenite and pyrite．Quartz is the most abundant gangue mineral，and other gangue minerals include calcite and fluorite．The main alteration types of wall rocks are silicification，K-felsparization and propylitization etc．Six molybdenite-bearing samples were selected for precise Re-Os dating，which yielded model ages ranging from 233.3±3.3Ma to 248.2±3.5Ma and an isochron age of 239±13Ma. The deposit was formed in the Middle-Triassic．The Qianfanling Mo deposit formed in the late stage of collision of North China and Yangtzi cratons．