Source of Ore-Forming Materials and Mineralization of the Dajing Cu-Sn Polymetallic Deposit, Inner Mongolia

详细信息   

• 责任者：Niu Shuyin (Resources College ; Shijiazhuang University of Economics ; Shijiazhuang 050031 ; China) ; Sun Aiqun
• 刊名：Geology in China
• 出版年：2008
• 卷期：35(4)
• 关键词：铜矿 ; copper ores ; 锡矿 ; tin ores ; 多金属矿 ; polymetallic ores ; 内蒙 ; Inner Mongolia
• 页码：p.714-724
• 图表：5 illus., 4 tables, 21 refs.
• 分类号：1001
• issnNo：ISSN1000-3657
• isbnNo：CN11-1167/P

摘要

The Dajing Cu-Sn polymetallic deposit is characterized by its large size, many associated elements, narrow and dense ore veins and high grades. From a viewpoint of mantle branch tectonics, the deposit is situated at the core of the Great Hinggan Mountains mantle branch, and the multiple evolution of the mantle hot plume linked up the deep hydrothermal ore fluids. The ore fluids extracted some ore materials on the way, which concentrated in favorable structural fractures and formed the deposit. The orientation of ore-controlling fractures is closely related with the regional structural stress field during mineralization. The zoning of the ore-forming elements Sn, Cu, Au, Ag, Pb and Zn within the deposit should be related to mineralization and crystallization temperatures of ore materials. The mineralizations of the elements such as Sn, Cu and Au, which crystallized under higher P-T conditions, are in the center of the ore field; whereas the mineralizations of the elements such as Ag, Pb and Zn, which crystallized under lower P-T conditions, were mostly localized in the surroundings of the deposit.