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Origin and evolution of hydrothermal fluids in the Marshoun epithermal Pb-Zn-Cu (Ag) deposit, Tarom-Hashtjin metallogenic belt, NW Iran
Kouhestani, Hossein1; Mokhtari, Mir Ali Asghar1; Qin, Kezhang2,3,4; Zhao, Junxing2
2019-10-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume113Pages:19
AbstractThe Marshoun epithermal Pb-Zn-Cu (Ag) deposit is located in the Tarom-Hashtjin metallogenic belt (THMB), northwest Iran. The epithermal base metal veins are mainly hosted in Eocene volcanic and volcaniclastic rocks of the Karaj Formation, and late Eocene pyroxene quartz monzodiorite. The mineralization process can be divided into five stages: (1) quartz-chalcopyrite-pyrite veins and breccias, (2) quartz (calcite)-sphalerite-galena +/- chalcopyrite +/- pyrite veins and breccias, (3) barren post-ore quartz veinlets, (4) barren post-ore calcite veinlets, and (5) supergene mineral assemblages. The primary metallic minerals are pyrite, chalcopyrite, sphalerite, and galena; gangue minerals are mainly quartz, calcite, sericite, and chlorite. The main wall-rock alteration is silicification, intermediate argillic, carbonate, and propylitic alteration. Microthermometric measurements of primary LV fluid inclusion assemblages in quartz and sphalerite indicate that the veins were mainly formed at temperatures between 173 and 285 degrees C from fluids with salinities between 3.4 and 6.3 wt% NaCl equiv. Coexisting LV, VL, and V inclusions in quartz and sphalerite provide evidence for boiling in ore-stage breccia and veins. Additionally, the occurrence of bladed calcite as well as plumose and colloform/crustiform banded quartz in the ore zones and the presence of hydrothermal breccias are consistent with boiling. Obtained oxygen and sulfur isotope compositions (delta O-18(water) = +9.2 parts per thousand to + 1.5 parts per thousand; delta S-34(H2s) = -10.0 parts per thousand to -5.7 parts per thousand) indicate there was a major contribution from a magmatic component to metallogenesis. The fluid inclusion and stable isotope data indicate that fluid boiling and mixing facilitated hydrothermal alteration and mineralization at Marshoun. The Marshoun deposit is interpreted as an intermediate-sulfidation style of epithermal mineralization. Our data suggest that the epithermal mineralization in the THMB are related to late Eocene (ca. 36-37 Ma) shallow magmatic-hydrothermal activity. The altered Eocene volcanic-subvolcanic rocks, particularly at the intersection of subvolcanic rocks with faults were the most favorable locus for exploration targeting of epithermal ores at THMB.
KeywordIntermediate-sulfidation Fluid inclusion Oxygen and sulfur isotopes Marshoun Tarom-Hashtjin Iran
DOI10.1016/j.oregeorev.2019.103087
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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, 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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, 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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, 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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran
WOS KeywordGOLD-SILVER DEPOSIT ; LEAD-ZINC VEIN ; STABLE-ISOTOPE ; FRESNILLO DISTRICT ; FUJIAN PROVINCE ; COPPER-DEPOSIT ; ORE GENESIS ; AU DEPOSIT ; U-PB ; INCLUSION EVIDENCE
Language英语
Funding ProjectKey Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China[KLMR2017-01] ; office of Vice Chancellor for Research and Technology, 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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, 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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, 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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, 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 ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000491635200004
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95737
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. Origin and evolution of hydrothermal fluids in the Marshoun epithermal Pb-Zn-Cu (Ag) deposit, Tarom-Hashtjin metallogenic belt, NW Iran[J]. ORE GEOLOGY REVIEWS,2019,113:19.
APA Kouhestani, Hossein,Mokhtari, Mir Ali Asghar,Qin, Kezhang,&Zhao, Junxing.(2019).Origin and evolution of hydrothermal fluids in the Marshoun epithermal Pb-Zn-Cu (Ag) deposit, Tarom-Hashtjin metallogenic belt, NW Iran.ORE GEOLOGY REVIEWS,113,19.
MLA Kouhestani, Hossein,et al."Origin and evolution of hydrothermal fluids in the Marshoun epithermal Pb-Zn-Cu (Ag) deposit, Tarom-Hashtjin metallogenic belt, NW Iran".ORE GEOLOGY REVIEWS 113(2019):19.
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