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Origin of the ore-forming fluids of the Zefreh porphyry Cu-Mo prospect, central Iran: Constraints from fluid inclusions and sulfur isotopes

文献类型：期刊论文

作者Khosravi, Maryam5; Rajabzadeh, Mohammad Ali5; Mernagh, Terrence P.2; Qin, KeZhang3,4; Bagheri, Hashem1; Su, ShiQiang3,4
刊名ORE GEOLOGY REVIEWS
出版日期2020-12-01
卷号127页码:15
ISSN号0169-1368
关键词Zefreh porphyry Cu-Mo prospect Vein system Fluid inclusions Sulfur isotopes Ore metal precipitation Central Iran
DOI10.1016/j.oregeorev.2020.103876
英文摘要The Zefreh porphyry Cu-Mo prospect is located in the central part of the NW-trending Cenozoic Urumieh-Dokhtar Metallogenic Belt, 75 km NE of Isfahan city, central Iran. Chalcopyrite and molybdenite mainly occur as disseminated sulfides in the host rocks and, to a lesser extent, in the surrounding volcanic rocks. Four types of fluid inclusions were identified in quartz-rich veins: i.e., two-phase liquid-rich, two-phase vapor-rich, simple brine, and multi-phase brine inclusions. Liquid-rich inclusions in ore-bearing, A-type quartz veins homogenized between 350 degrees and 370 degrees C, suggesting that fluids trapped in these inclusions were derived from magmatic fluids at high temperatures. Simple and multi-phase brine inclusions exhibited homogenization or partial homogenization over a wide range from 350 degrees to 1209 degrees C. The very high homogenization temperatures and the presence of up to six solid phases in multi-phase brine inclusions indicate heterogeneous trapping of melt, fluid, and vapor. The Zefreh porphyry prospect is thought to have formed from hypersaline liquids and vapors that exsolved from a magmatic intrusion assembled in the shallow crust. The delta S-34 values of sulfides from the Zefreh porphyry prospect range from +0.8 parts per thousand to +10.7 parts per thousand. This indicates that the early, ore-bearing quartz veins dominated by high-delta S-34 pyrites may have interacted with later hydrothermal fluids, or alternatively, the pyrites are paragenetically late products of propylitic and K-feldspar-dominated potassic alteration assemblages. Another plausible explanation for significantly enriched delta S-34 values of sulfides may be mixing of hydrothermal fluids of magmatic origin with the Cenozoic seawater (delta S-34 approximate to +22 parts per thousand). It is suggested that the Zefreh prospect likely would be a poor target for further exploration.
WOS关键词MAGMATIC-HYDROTHERMAL FLUIDS ; ZIRCON U-PB ; COPPER-DEPOSIT ; PHYLLIC ALTERATION ; PVTX PROPERTIES ; NEW-MEXICO ; EVOLUTION ; MOLYBDENUM ; MINERALIZATION ; DISTRICT
资助项目Research Council of Shiraz University, Iran ; CAS Key Lab of Mineral Resources, China
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
出版者ELSEVIER
WOS记录号WOS:000598902400003
资助机构Research Council of Shiraz University, Iran ; Research Council of Shiraz University, Iran ; CAS Key Lab of Mineral Resources, China ; CAS Key Lab of Mineral Resources, China ; Research Council of Shiraz University, Iran ; Research Council of Shiraz University, Iran ; CAS Key Lab of Mineral Resources, China ; CAS Key Lab of Mineral Resources, China ; Research Council of Shiraz University, Iran ; Research Council of Shiraz University, Iran ; CAS Key Lab of Mineral Resources, China ; CAS Key Lab of Mineral Resources, China ; Research Council of Shiraz University, Iran ; Research Council of Shiraz University, Iran ; CAS Key Lab of Mineral Resources, China ; CAS Key Lab of Mineral Resources, China
源URL[http://ir.iggcas.ac.cn/handle/132A11/99944]  
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
通讯作者Rajabzadeh, Mohammad Ali
作者单位1.Univ Isfahan, Dept Geol, Fac Sci, Esfahan, Iran
2.Australian Natl Univ, Res Sch Earth Sci, Acton, ACT 2601, Australia
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Shiraz Univ, Sch Sci, Dept Earth Sci, Shiraz 7146713565, Iran
推荐引用方式
GB/T 7714		 Khosravi, Maryam,Rajabzadeh, Mohammad Ali,Mernagh, Terrence P.,et al. Origin of the ore-forming fluids of the Zefreh porphyry Cu-Mo prospect, central Iran: Constraints from fluid inclusions and sulfur isotopes[J]. ORE GEOLOGY REVIEWS,2020,127:15.
APA Khosravi, Maryam,Rajabzadeh, Mohammad Ali,Mernagh, Terrence P.,Qin, KeZhang,Bagheri, Hashem,&Su, ShiQiang.(2020).Origin of the ore-forming fluids of the Zefreh porphyry Cu-Mo prospect, central Iran: Constraints from fluid inclusions and sulfur isotopes.ORE GEOLOGY REVIEWS,127,15.
MLA Khosravi, Maryam,et al."Origin of the ore-forming fluids of the Zefreh porphyry Cu-Mo prospect, central Iran: Constraints from fluid inclusions and sulfur isotopes".ORE GEOLOGY REVIEWS 127(2020):15.

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来源：地质与地球物理研究所

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