Geology and ore fluid geochemistry of the Jinduicheng porphyry molybdenum deposit, East Qinling, China

doi:10.1016/j.jseaes.2013.07.032

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院矿产资源研究所

	Geology and ore fluid geochemistry of the Jinduicheng porphyry molybdenum deposit, East Qinling, China
	Li, Hongying 4; Ye, Huishou ; Wang, Xiaoxia ; Yang, Lei 1; Wang, Xiuyuan 2
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2014
卷号	79 页码:641-654
关键词	Fluid inclusions Stable isotopes Porphyry molybdenum deposit Jinduicheng East Qinling China
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2013.07.032
英文摘要	Jinduicheng deposit is a giant Mesozoic porphyry Mo system deposit in the East Qinling molybdenum belt, Shaanxi Province, China. The mineralization is associated with the I-type Jinduicheng granite porphyry. Both the porphyry stock and country rocks underwent intense hydrothermal alteration. The alteration, with increasing distance from the parent intrusion, changes from silicification, through potassic and phyllic assemblages, carbonation, to propylitic assemblages. Molybdenite, the dominant ore mineral,, occurs in veinlets, most of which are hosted by the altered country rocks, with less than 25% of the ore in the porphyry body. The hydrothermal system comprises four stages, including pre-ore quartz and K-feldspar; two ore stages of quartz, K-feldspar, molybdenite, and Pb- And Zn-bearing sulfides; and post-ore quartz and carbonate. Six main types of primary fluid inclusions are present in hydrothermal quartz, including two-phase aqueous, one-phase aqueous, three-phase CO2-bearing, CO2-dominated fluid inclusions, gas inclusions, and melt inclusions. The homogenization temperatures of fluid inclusions range from 210 to 290 degrees C in the pre-ore stage, 150-310 degrees C in ore stage I, 150-360 degrees C in the ore stage II, and 195-325 C in the post-ore stage quartz. Estimated salinities of the ore-forming fluids range from 6.9 to 13.5, 4.3 to 123, 6.2 to 12.4, and 3.4 to 9.9 wt.% NaCI equiv. in stages 1-4, respectively. The delta S-34 values of pyrite in the two ore stages range from 2.8 parts per thousand to 4.3 parts per thousand, whereas the delta S-34 values of molybdenite range from 2.9 parts per thousand to 6.2 parts per thousand. The data suggest both magmatic and crustal sources of sulfur. The delta D and 6180 values for the hydrothermal fluids are -57.2 parts per thousand, to -84.4 parts per thousand and 8.0 parts per thousand to -3.2 parts per thousand, respectively. The fluid inclusion and stable data indicate that the pre-ore hydrothermal fluids were mostly of magmatic origin, but the fluids responsible for ore deposition were mixed magmatic and meteoric, and eventually meteoric water dominated the system in the post-ore stage. (C) 2013 Elsevier Ltd. All rights reserved.
学科主题	矿床地质
WOS关键词	DABIE OROGENIC BELT ; U-PB AGES ; NORTH CHINA ; TECTONIC IMPLICATIONS ; LAONIUSHAN COMPLEX ; CONTINENTAL-CRUST ; SOUTHERN MARGIN ; ION MICROPROBE ; HF ISOTOPES ; MO DEPOSIT
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000330605000006
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40426]
专题	中国地质科学院矿产资源研究所
作者单位	1.CAGS, Inst Mineral Resources, Minist Land & Resources, Key Lab Metallogeny & Mineral Resource Assessment, Beijing 100037, Peoples R China 2.China Natl Offshore Oil Corp, Res Inst, Beijing 100027, Peoples R China 3.Jinduicheng Molybdenum Co Laser Target Designator, Xian 710077, Peoples R China 4.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Li, Hongying,Ye, Huishou,Wang, Xiaoxia,et al. Geology and ore fluid geochemistry of the Jinduicheng porphyry molybdenum deposit, East Qinling, China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,79:641-654.
APA	Li, Hongying,Ye, Huishou,Wang, Xiaoxia,Yang, Lei,&Wang, Xiuyuan.(2014).Geology and ore fluid geochemistry of the Jinduicheng porphyry molybdenum deposit, East Qinling, China.JOURNAL OF ASIAN EARTH SCIENCES,79,641-654.
MLA	Li, Hongying,et al."Geology and ore fluid geochemistry of the Jinduicheng porphyry molybdenum deposit, East Qinling, China".JOURNAL OF ASIAN EARTH SCIENCES 79(2014):641-654.