Molybdenite Re-Os dating and its tectonic significance of the Guilingou porphyry molybdenum deposit, southern Qinling

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Molybdenite Re-Os dating and its tectonic significance of the Guilingou porphyry molybdenum deposit, southern Qinling
	Zhang Hong 1; Chen DanLing 1; Zhai MingGuo 2; Zhang FuXin 1; Gong XiangKuan 1; Sun WeiDong 3,4
刊名	ACTA PETROLOGICA SINICA
	2015-07-01
卷号	31 期号:7 页码:2023-2037
关键词	Guilingou Mo deposit Molybdenum Re-Os isochron age Zircon U-Pb dating Mineralization stage South Qinling
文献子类	Article
英文摘要	The Guilingou porphyry molybdenum deposit in Zhen ' an City, Shaanxi Province is located in the southern Qinling polymetallic belts. The wall rocks of the deposit mainly consist of fine-grained granite, K-feldspar granite and altered coarse-grained granite. Molybdenite Re-Os isotopic dating of the ore deposit and zircon U-Pb dating of wall rock were conducted to constrain the relationship between magmatic evolution and mineralization as well as their tectonic significances. The results showed that six molybdenite Re-Os model ages range from 195. 9Ma to 198. 5Ma, with a weighted average age of 197. 2 +/- 1. 3Ma, indicating that the Guilingou porphyry Mo deposit was formed in the Early Jurassic. Meanwhile, zircon U-Pb dating of fine-grained granite, K-feldspar granite and altered coarse-granite yielded ages of 199 +/- 1. 4Ma, 201 +/- 3. 1Ma and 198 +/- 11Ma, respectively. This suggests that granitic magmatism was almost simultaneous with the mineralization of the Guilingou porphyry molybdenum deposit. Remarkably, the metallogenic age of 200 similar to 190Ma for the Guilingou Mo deposit is different from the reported three main mineralization stages of Qinling molybdenum deposits in literatures, namely 238 similar to 213Ma, 145 similar to 126Ma and 116 similar to 110Ma, with being slightly later than the first mineralization stage, displaying an unknown important metallogenic event in the Qinling polymetallic belts. This finding will be of importance in guiding the ore exploration in the southern Qinling. Our results also suggest the Guilingou porphyry molybdenum deposit was probably formed during the magmatic-hydrothermal process induced by orogenic collapse following the Indosinian collision between the South China Block and the North China Block.
WOS关键词	DABIE OROGENIC BELT ; ZIRCON U-PB ; LA-ICP-MS ; MO DEPOSIT ; HENAN PROVINCE ; GEOCHEMICAL CHARACTERISTICS ; SHAANXI PROVINCE ; CHINA ; AGE ; COUNTY
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000358550700017
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62303]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
作者单位	1.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resource, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China 4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang Hong,Chen DanLing,Zhai MingGuo,et al. Molybdenite Re-Os dating and its tectonic significance of the Guilingou porphyry molybdenum deposit, southern Qinling[J]. ACTA PETROLOGICA SINICA,2015,31(7):2023-2037.
APA	Zhang Hong,Chen DanLing,Zhai MingGuo,Zhang FuXin,Gong XiangKuan,&Sun WeiDong.(2015).Molybdenite Re-Os dating and its tectonic significance of the Guilingou porphyry molybdenum deposit, southern Qinling.ACTA PETROLOGICA SINICA,31(7),2023-2037.
MLA	Zhang Hong,et al."Molybdenite Re-Os dating and its tectonic significance of the Guilingou porphyry molybdenum deposit, southern Qinling".ACTA PETROLOGICA SINICA 31.7(2015):2023-2037.