Rock-Forming and Ore-Forming Ages of the Baizhangyan Tungsten-Molybdenum Ore Deposit in Qingyang, Anhui Province and Their Geological Significance

• 责任者：Qin Yan (Graduate Department ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Wang Denghong
• 刊名：Earth Science Frontiers
• 出版年：2010
• 卷期：17(2)
• 关键词：钨矿 ; tungsten ores ; 钼矿 ; molybdenum ores ; 铀—铅计时 ; U-Pb dating ; 安徽 ; Anhui Province
• 页码：p.170-177
• 图表：6 illus., 3 tables, 13 refs.
• 分类号：1001
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

Baizhangyan tungsten-molybdenum ore deposit is a newly developed deposit which was found on the base of a small exposure of mineralization occurrence. With highly precise dating of the ages of the rock-forming and ore-forming, the authors obtained a SHRIMP U-Pb zircon age of (130±1.5) Ma (n=14, MSWD=0.69) for fine-grained granite and Re-Os model ages of (133.5±1.9)-(135.6±2.0) Ma and isochron age of (136.3±2.6) Ma (n=5, MSWD=0.64).  According to the ages above, the authors concluded that the deposit was formed in the Early Cretaceous; that it was the result of intrusions of the granite which was of crustsource remelting type.  The ore-forming age is similar to the rock-forming age of the granite rock body that was important to the deposit.