SHRIMP U-Pb Zircon Dating of Mesoproterozoic Anatase-Rich Ore Beds and Granite in Yangtizishan-Moshishan Anatase Deposit, Inner Mongolia, and Its Geological Significance
详细信息
- 责任者：Li Daxin （Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhao Yiming
- 刊名：Mineral Deposits
- 出版年：2008
- 卷期：27(4)
- 关键词：钛矿 ; titanium ores ; 铀—铅计时 ; U ; Pb ; 内蒙 ; Inner Mongolia
- 页码：p.449-458
- 图表：6 illus., 2 tables, 15 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
///Based on detailed geological reconnaissance and petrological research, the authors selected zircons from a Mesoproterozoic metamorphosed sedimentary type anatase-rich ore bed in the Moshishan ore belt within the northern part of the ore district and a granite body at the contact zone between the granite and a hydrothermally modified type ore shoot in the western segment of the Yangtizishan ore belt within the southern part of the ore district for relatively systematic SHRIMP U-Pb zircon dating. The granite body has an emplacement (or crystallization) age of 118 Ma, indicating a late Yanshanian product and representing the age of the metallogenic epoch when the western segment of the Yangtizishan ore belt locally underwent the late-stage hydrothermal reformation.