SHRIMP Dating of Medium-Coarse-Grained Granite in Chaobuleng Iron Deposit, Dong Ujimqin Banner, Inner Mongolia

• 责任者：Xu Liquan (Inner Mongolia Institute of Geological Survey ; Huhhot 010020 ; China) ; Chen Zhiyong
• 刊名：Mineral Deposits
• 出版年：2010
• 卷期：29(2)
• 关键词：铁矿 ; iron ores ; 花岗岩 ; granite ; SHRIMP定年 ; SHRIMP dating ; 内蒙古 ; Inner Mongolia
• 页码：p.317-322
• 图表：3 illus., 1 table, 7 refs.
• 分类号：1001
• issnNo：ISSN0258-7106
• isbnNo：CN11-1965/P

The Chaobuleng iron deposit is located in the Erlianhaote-Dong Ujimqin Banner polymetallic metallogenic belt of Inner Mongolia. The medium-coarse-grained granite in the area has close genetic relationship with the Chaobuleng skarn iron deposit, and hence was chosen to determine the SHRIMP U-Pb age. The results show that the granite intruded in (136.9±1.5) Ma, which is consistent to the mineralization age of (140.7±1.8) Ma (Re-Os), suggesting that the mineralization and the rock-forming process occurred at the same time. An analysis of regional metallogenic geological setting shows that mineralization of the metallogenic belt might have occurred in Yanshanian period.