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| Fluid inclusion, zircon U-Pb geochronology, and O-S isotopic constraints on the origin and evolution of ore-forming fluids of the tashvir and varmazyar epithermal base metal deposits, NW Iran | |
| Kouhestani, Hossein1; Mokhtari, Mir Ali Asghar1; Chang, Zhaoshan2,3; Qin, Kezhang4,5; Marsa, Soheila Aghajani6 | |
| 2022-12-15 | |
| Source Publication | FRONTIERS IN EARTH SCIENCE
 |
| Volume | 10Pages:27 |
| Abstract | Tashvir and Varmazyar deposits are part of the epithermal ore system in the Tarom-Hashtjin Metallogenic Belt (THMB), NW Iran. In both deposits, epithermal veins are hosted by Eocene volcanic-volcaniclastic rocks of the Karaj Formation and are spatially associated with late Eocene granitoid intrusions. The ore assemblages consist of pyrite, chalcopyrite, chalcocite, galena, and sphalerite (Fe-poor), with lesser amounts of bornite and minor psilomelane and pyrolusite. Fluid inclusion measurements from the Tashvir and Varmazyar revealed 182-287 and 194-285 degrees C formation temperatures and 2.7-7.9 and 2.6-6.4 wt.% NaCl equivalent salinities, respectively. The oxygen isotope data suggested that the mineralizing fluids originated dominantly from a magmatic fluid that mixed with meteoric waters. The sulfur isotope data indicated that the metal and sulfur sources were largely a mixture of magma and surrounding sedimentary rocks. LA-ICP-MS zircon U-Pb dating of the granitoid intrusion at Tashvir and Varmazyar, yielded a weighted mean age of 38.34-38.31 and 40.85 Ma, respectively, indicating that epithermal mineralization developed between 40.85 and 38.31 Ma. Our data indicated that fluid mixing along with some fluid boiling were the main drives for hydrothermal alteration and mineralization at Tashvir and Varmazyar. All these characteristics suggested an intermediate-sulfidation epithermal style of mineralization. The THMB is proposed to be prospective for precious and base metal epithermal mineralization. Considering the extensional tectonic setting, and lack of advanced argillic lithocaps and hypersaline fluid inclusions, the THMB possibly has less potential for economically important porphyry mineralization. |
| Keyword | intermediate-sulfidation fluid inclusions stable isotopes geochronology NW Iran |
| DOI | 10.3389/feart.2022.990761 |
| Funding Organization | 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia |
| WOS Keyword | CU-AU DEPOSIT ; MAGMATIC-HYDROTHERMAL FLUIDS ; STABLE-ISOTOPE ; GOLD DEPOSIT ; PORPHYRY MINERALIZATION ; CHINA IMPLICATIONS ; METALLOGENIC BELT ; BRITISH-COLUMBIA ; SULFIDATION GOLD ; SOUTHERN KYUSHU |
| Language | 英语 |
| Funding Project | office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia |
| Funding Organization | 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; 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 ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia ; EGRU (Economic Geology Research Centre), James Cook University, Townsville, Queensland, Australia |
| WOS Research Area | Geology |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000900468600001 |
| Publisher | FRONTIERS MEDIA SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iggcas.ac.cn/handle/132A11/106963 |
| Collection | 矿产资源研究院重点实验室 |
| Corresponding Author | Kouhestani, Hossein |
| Affiliation | 1.Univ Zanjan, Fac Sci, Dept Geol, Zanjan, Iran 2.Colorado Sch Mines, Dept Geol & Geol Engn, Golden, CO USA 3.James Cook Univ, Coll Sci & Engn, EGRU Econ Geol Res Ctr, Townsville, Qld, Australia 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China 6.Iranian Mineral Proc Res Ctr IMPRC, Mineral Labs, Karaj, Iran |
| Recommended Citation GB/T 7714 | Kouhestani, Hossein,Mokhtari, Mir Ali Asghar,Chang, Zhaoshan,et al. Fluid inclusion, zircon U-Pb geochronology, and O-S isotopic constraints on the origin and evolution of ore-forming fluids of the tashvir and varmazyar epithermal base metal deposits, NW Iran[J]. FRONTIERS IN EARTH SCIENCE,2022,10:27. |
| APA | Kouhestani, Hossein,Mokhtari, Mir Ali Asghar,Chang, Zhaoshan,Qin, Kezhang,&Marsa, Soheila Aghajani.(2022).Fluid inclusion, zircon U-Pb geochronology, and O-S isotopic constraints on the origin and evolution of ore-forming fluids of the tashvir and varmazyar epithermal base metal deposits, NW Iran.FRONTIERS IN EARTH SCIENCE,10,27. |
| MLA | Kouhestani, Hossein,et al."Fluid inclusion, zircon U-Pb geochronology, and O-S isotopic constraints on the origin and evolution of ore-forming fluids of the tashvir and varmazyar epithermal base metal deposits, NW Iran".FRONTIERS IN EARTH SCIENCE 10(2022):27. |
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