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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
Kouhestani, Hossein1; Mokhtari, Mir Ali Asghar1; Qin, Kezhang2,3,4; Zhao, Junxing2
2019-06-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume109Pages:564-584
AbstractIn 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.
KeywordIntermediate-sulfidation Fluid inclusion Stable isotopes Ore genesis Zajkan Tarom-Hashtjin Iran
DOI10.1016/j.oregeorev.2019.05.014
Funding OrganizationKey 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
WOS KeywordAU-AG DEPOSIT ; ACTIVE GEOTHERMAL SYSTEMS ; CREEDE MINING DISTRICT ; SAN-JUAN MOUNTAINS ; GOLD DEPOSIT ; HYDROTHERMAL ALTERATION ; FUJIAN PROVINCE ; COPPER-DEPOSIT ; U-PB ; CHINA IMPLICATION
Language英语
Funding ProjectKey Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China[KLMR2017-01] ; University of Zanjan, Zanjan, Iran
Funding OrganizationKey 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
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000472686500033
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/92662
Collection矿产资源研究院重点实验室
Corresponding AuthorKouhestani, Hossein
Affiliation1.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
Recommended Citation
GB/T 7714
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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