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Fluid inclusion and stable isotope constraints on ore genesis of the Zajkan epithermal base metal deposit, Tarom-Hashtjin metallogenic belt, NW Iran

文献类型:期刊论文

作者Kouhestani, Hossein1; Mokhtari, Mir Ali Asghar1; Qin, Kezhang2,3,4; Zhao, Junxing2
刊名ORE GEOLOGY REVIEWS
出版日期2019-06-01
卷号109页码:564-584
ISSN号0169-1368
关键词Intermediate-sulfidation Fluid inclusion Stable isotopes Ore genesis Zajkan Tarom-Hashtjin Iran
DOI10.1016/j.oregeorev.2019.05.014
英文摘要In the Zajkan Pb-Zn-Cu (Au-Ag) deposit of the Tarom-Hashtjin metallogenic belt (THMB), northwest Iran, mineralization occurs as quartz-base metal sulfide veins hosted by Eocene volcanic and volcaniclastic rocks of the Karaj Formation. Four stages of ore formation are identified at Zajkan: (1) quartz-chalcopyrite-pyrite veins, (2) quartz-galena-sphalerite +/- chalcopyrite +/- pyrite veins and breccias, (3) quartz-hematite veins and breccias, and (4) barren quartz-carbonate veinlets. The primary metallic minerals are pyrite, chalcopyrite, sphalerite, galena, and trace amounts of hematite; gangue minerals are mainly quartz, sericite, chlorite, and calcite. The main wall-rock alteration is silicification, and intermediate argillic, and propylitic alteration. The coexistence of different types of fluid inclusions (LV, VL, and V) in individual fluid inclusion assemblages in quartz and sphalerite suggests boiling and heterogeneous trapping. Excluding the heterogeneously entrapped fluid inclusions, the microthermometric measurements of primary LV fluid inclusion assemblages in quartz and sphalerite indicate that the veins were formed at temperatures between 217 and 273 degrees C from fluids with salinities between 1.7 and 6.4 wt% NaCl equiv. The oxygen isotopic compositions (delta O-18(water-VSMOW) of +3.7 to +1.1 parts per thousand) indicate that the ore-forming fluids were mainly derived from magmatic water with the input of meteoric water in the later ore-stages. Sulfur isotopic values of sulfide minerals vary over a narrow range from -5.0 to -0.9 parts per thousand(VCDT) (averaging -2.2 parts per thousand(VCDT)), suggesting that sulfur was derived from a homogeneous magmatic source. The fluid inclusion and stable isotope data indicate that fluid boiling and mixing facilitated hydrothermal alteration and mineralization at Zajkan. Our data suggest that the Zajkan deposit is an intermediate-sulficiation style epithermal mineralization. The estimated ore formation depth of Zajkan indicates minor denudation in the region and may imply a great prospecting potential for other epithermal mineralization in the THMB.
WOS关键词AU-AG DEPOSIT ; ACTIVE GEOTHERMAL SYSTEMS ; CREEDE MINING DISTRICT ; SAN-JUAN MOUNTAINS ; GOLD DEPOSIT ; HYDROTHERMAL ALTERATION ; FUJIAN PROVINCE ; COPPER-DEPOSIT ; U-PB ; CHINA IMPLICATION
资助项目Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China[KLMR2017-01] ; University of Zanjan, Zanjan, Iran
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000472686500033
资助机构Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; University of Zanjan, Zanjan, Iran ; University of Zanjan, Zanjan, Iran ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; University of Zanjan, Zanjan, Iran ; University of Zanjan, Zanjan, Iran ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; University of Zanjan, Zanjan, Iran ; University of Zanjan, Zanjan, Iran ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; University of Zanjan, Zanjan, Iran ; University of Zanjan, Zanjan, Iran
源URL[http://ir.iggcas.ac.cn/handle/132A11/92662]  
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Kouhestani, Hossein
作者单位1.Univ Zanjan, Fac Sci, Dept Geol, Zanjan 45195313, Iran
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Kouhestani, Hossein,Mokhtari, Mir Ali Asghar,Qin, Kezhang,et al. Fluid inclusion and stable isotope constraints on ore genesis of the Zajkan epithermal base metal deposit, Tarom-Hashtjin metallogenic belt, NW Iran[J]. ORE GEOLOGY REVIEWS,2019,109:564-584.
APA Kouhestani, Hossein,Mokhtari, Mir Ali Asghar,Qin, Kezhang,&Zhao, Junxing.(2019).Fluid inclusion and stable isotope constraints on ore genesis of the Zajkan epithermal base metal deposit, Tarom-Hashtjin metallogenic belt, NW Iran.ORE GEOLOGY REVIEWS,109,564-584.
MLA Kouhestani, Hossein,et al."Fluid inclusion and stable isotope constraints on ore genesis of the Zajkan epithermal base metal deposit, Tarom-Hashtjin metallogenic belt, NW Iran".ORE GEOLOGY REVIEWS 109(2019):564-584.

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来源:地质与地球物理研究所

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