• 责任者：Wang Xilong (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Liu Jiajun
• 刊名：Geotectonica et Metallogenia
• 出版年：2013
• 卷期：37(4)
• 关键词：铅锌矿床 ; lead-zinc deposit ; 银矿 ; silver ores ; 铀—铅计时 ; U-Pb dating ; 内蒙古 ; Inner Mongolia
• 页码：p.730-742
• 图表：7 illus., 2 tables, 61 refs.
• 分类号：1001
• issnNo：ISSN1001-1552
• isbnNo：CN44-1595/P

     Located in the southern section of the Daxing＇anling metallogenic belt, the Bianjiadayuan Pb-Zn-Ag deposit is a typical hydrothermal vein-type polymetallic deposit. In order to determine the diagenetic age of the deposit, LA-ICP-MS U-Pb age study was conducted on the zircons in the gabbro and diorite associated with the mineralization. The results suggest that the gabbro and diorite were crystallized in 133.19 Ma and 130.48 Ma, respectively. The gabbro and diorite are enriched in LILE, LREE and depleted in HFSE, which indicate that the magma were derived from lithospheric mantle and formed in extensional tectonic setting. Combined with the geological characteristics and the previous research in this region, the Yanshanian is considered to be a peak period of mineralization and magmatism of the southern Daxing＇anling. The tectonic setting of the intrusive rocks was in the transition period from lithosphere compression to extension.