Genetic Types, Ore-forming Age and Geodynamic Setting of Endogenic Molybdenum Deposits in the Eastern Edge of Xing-Meng Orogenic Belt
详细信息
- 责任者：Sun Jinggui (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Zhang Yong
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(4)
- 关键词：钼矿 ; molybdenum ores ; 成矿动力学 ; metallogenic dynamics ; 内生矿床 ; endogenic deposit ; 内蒙古 ; Inner Mongolia
- 页码：p.1317-1332
- 图表：illus., 5 tables, 78 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The eastern edge of Xing-Meng orogenic belt in China, is an important polymetallic metallogenic district, where more than 20 large-, medium- and small-scale Mo deposits have been found in recent years. According to geological features, geochemical characteristics and geochronology, the endogenic molybdenum deposits in the region are divided into porphyry type, contact-metasomatic hydrothermal type and medium-high temperature hydrothermal type. The research results show that porphyry deposits are associated with high-potassium calc-alkaline granitic magmas, while contact-metasomatic hydrothermal deposits are related to calc-alkaline granitic magma and the nature of host rocks. Metallogenic materials possess the characteristic of crust-mantle mixing source. The Mo mineralization in the study area mainly occurred in 195～165 Ma and 115～110 Ma. The corresponding geodynamic mechanisms responsible for the Mo mineralization in different times may be closely related to the subduction of paleo-Pacific plate and Izanagi plate towards the Eurasia continent, respectively.