Isotope Geochemistry of the Wurinitu W-Mo Deposit in Sunid Zuoqi, Inner Mongolia, China
详细信息
- 责任者：Yang Zenghai (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Wang Jianping
- 刊名：Geoscience
- 出版年：2013
- 卷期：27(1)
- 关键词：钨矿 ; tungsten ores ; 钼矿 ; molybdenum ores ; 内蒙古 ; Inner Mongolia
- 页码：p.13-23
- 图表：illus., 3 tables, 30 refs.
- 分类号：1001
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
The Wurinitu W-Mo deposit,located in Sunid Zuoqi,Inner Mongolia,is a large scaled W-Mo deposit which is discovered in recent years.The W-Mo orebodies mainly occurred in Yanshanian granite rock body and the nearby contact zone,with the major type of veinlet mineralization.The measured δ34SV-CDT value of the Wurinitu orebody(0.6‰ to 4.1‰) varies in a very limited range and suggests that the formation of W-Mo ore-body is closely related to magmatism and the sulfur may be leached from the granite intrusion.Based on tectonic patterns of lead isotope and related parameters,the lead isotopic compositions of the Wurinitu orebody(208Pb/204Pb=38.115-38.353,207Pb/204Pb=15.528-15.591,206Pb/204Pb=18.375-18.528) indicate that the mineralization may be induced by the magmatism,and ore-forming material is characterized by the source of lower crust and show crust-mantle mixing.δ13CPDB and δ18OSMOW of the hydrothermal calcite are from-8.63‰ to-6.41‰ and from-1.49‰ to 8.72‰,respectively.It shows that the hydrothermal calcite forms in two mineralization stages.The CO2 in the earlier stage is related to the magma;and the later hydrothermal ore fluids show the characteristics of mixture fluids of meteoric water with magmatic water as the meteoric water added.