Geological Features and Genesis of Gold Deposits Hosted by Low-Grade Metamorphic Rocks in Central-Western Inner Mongolia

• 责任者：Nie Fengjun (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Jiang Sihon
• 刊名：Mineral Deposits
• 出版年：2010
• 卷期：29(1)
• 关键词：金矿 ; gold ores ; 内蒙古 ; Inner Mongolia
• 页码：p.58-70
• 图表：8 illus., 1 table, 29 refs.
• 分类号：1001
• issnNo：ISSN0258-7106
• isbnNo：CN11-1965/P

The central-western Inner Mongolia area, located in the western section of the northern margin of the North China Craton, is one of the most important gold metallogenic provinces in North China. The gold deposits and prospects hosted by low-grade metamorphic rocks are widely distributed in two parallel EW-trending Protrozoic rift belts, i.e., the Bayan Obo belt in the north, and the Chaiertaishan belt in the south. All these gold deposits are characterized by shallow burial, large-size, simple composition and easy mining. Systematic geological investigations indicate that wall rocks of these deposits and prospects vary from place to place, but most of them show an intimate spatial-temporal relation with the Caledonian ductile-brittle fracture zone and the Hercynian intrusive dyke swarm. Geometry of individual ore bodies is mainly controlled by interstratified fracture zones. All the geological features of the gold deposits hosted by low-grade metamorphic rocks in central-western Inner Mongolia are similar to features of the Muruntau gold deposit in Uzbekistan.