Geochemical Characteristics of Granites in the Suonaga Pb-Zn-Ag Deposit of Dong Ujimqin Banner, Inner Mongolia, and Their Tectonic and Ore-Forming Implications
详细信息
- 责任者：Liang Yuwei (No.1 Institute of Geology and Mineral Resources Development ; Hohhot 010020 ; China) ; Yu Cunlin
- 刊名：Geology in China
- 出版年：2013
- 卷期：40(3)
- 关键词：铅锌矿床 ; lead-zinc deposit ; 银矿 ; silver ores ; 内蒙古 ; Inner Mongolia
- 页码：p.767-779
- 图表：6 illus., 2 tables, 39 refs.
- 分类号：1001
- issnNo：ISSN1000-3657
- isbnNo：CN11-1167/P
摘要
The ore-bearing pluton in the Suonaga Pb-Zn-Ag deposit is composed of medium-coarse-grained granite, fine-grained biotite granite and pseudoporphyritic K-feldspar granite. The zircon U-Pb dating results show that the medium-coarse-grained granite was formed at （319.6±4.1） Ma, the fine-grained biotite granite was formed at （172.5 ±1.4） Ma, and the pseudoporphyritic K-feldspar granite was formed at (165.5 ±1.8) Ma. The petrogeochemistry of the three rock bodies is characterized by high K, rich alkali and poor magnesium, so they all belong to calcium-basic, quasi-aluminous to weakly peraluminous and highly-differentiated rocks.