Genesis of the Abbasabad epithermal base metal deposit, NW Iran: Evidences from ore geology, fluid inclusion and O-S isotopes
文献类型：期刊论文
| 作者 | Kouhestani, Hossein4; Mokhtari, Mir Ali Asghar4; Qin, Kezhang1,2,3; Zhang, Xianan1,3 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 126页码:21 |
| 关键词 | Intermediate-sulfidation epithermal Fluid inclusion Isotope geochemistry Abbasabad NW Iran |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2020.103752 |
| 英文摘要 | The Abbasabad epithermal Pb-Zn-Cu deposit is located in the Tarom-Hashtjin Metallogenic Belt (THMB), northwest Iran. Mineralization occurs as quartz-base metal sulfide veins and breccias mainly hosted by Eocene volcanic and volcaniclastic rocks of the Karaj Formation. Four mineralization stages are recognized: (1) quartz-chalcopyrite-pyrite veins and breccias, (2) quartz-calcite I-sphalerite-galena +/- chalcopyrite +/- pyrite veins and breccias, (3) late stage barite veins and veinlets, and (4) barren post-ore calcite II veinlets. The primary metallic minerals, in order of abundance, are galena, sphalerite, chalcopyrite, and pyrite; gangue minerals are mainly quartz, barite, calcite, sericite/illite, and chlorite. The main wall-rock alteration is silicification, intermediate argillic, carbonatization, and propylitic alteration. Microthermometric measurements of primary LV fluid inclusion assemblages in quartz, sphalerite and barite show that the ore-forming fluids belong to the lowto moderate-temperature (170-315 degrees C), moderate-salinity (3.6-7.1 wt% NaCl equiv.), low-density H2O-NaCl system. Estimated trapping hydrostatic pressures are 60 to 100 bars, corresponding to entrapment depths of 614 to 1022 m below the paleowater table. Oxygen isotopic data (delta(OH2O)-O-18 of + 7.6 to + 0.6 parts per thousand) indicate that the ore forming fluid was derived largely from magmatic fluid, with the addition of meteoric water in the later stage. delta S-34(H2S) values of sulfides vary over a narrow range from -7.4 parts per thousand to -15.4 parts per thousand, (averaging - 16.3 parts per thousand), indicate that sulfur might be derived from a relatively homogeneous magmatic source which oxidized by meteoric water through fluid mixing. The Abbasabad deposit is interpreted as an intermediate-sulfidation epithermal mineralization derived from a mixed source during a phase change in temperature and pressure interpreted as being related to fluid mixing and boiling. Our data suggest that mineralization at Abbasabad and other epithermal deposits in the THMB are related to late Eocene (similar to 40 to 36 Ma) post-collisional magmatism, which is a useful concept for local and regional epithermal base metal exploration targeting. |
| WOS关键词 | ACTIVE GEOTHERMAL SYSTEMS ; CU-AU DEPOSIT ; THERMOCHEMICAL SULFATE REDUCTION ; GOLD-SILVER DEPOSIT ; STABLE-ISOTOPE ; HYDROTHERMAL FLUIDS ; AG DEPOSIT ; U-PB ; MINING DISTRICT ; FUJIAN PROVINCE |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0806] ; office of Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000591448600001 |
| 出版者 | ELSEVIER |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; 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 ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; 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 ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; 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 ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; 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 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98732]  |
| 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 Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 4.Univ Zanjan, Fac Sci, Dept Geol, Zanjan 45195313, Iran |
| 推荐引用方式 GB/T 7714 | Kouhestani, Hossein,Mokhtari, Mir Ali Asghar,Qin, Kezhang,et al. Genesis of the Abbasabad epithermal base metal deposit, NW Iran: Evidences from ore geology, fluid inclusion and O-S isotopes[J]. ORE GEOLOGY REVIEWS,2020,126:21. |
| APA | Kouhestani, Hossein,Mokhtari, Mir Ali Asghar,Qin, Kezhang,&Zhang, Xianan.(2020).Genesis of the Abbasabad epithermal base metal deposit, NW Iran: Evidences from ore geology, fluid inclusion and O-S isotopes.ORE GEOLOGY REVIEWS,126,21. |
| MLA | Kouhestani, Hossein,et al."Genesis of the Abbasabad epithermal base metal deposit, NW Iran: Evidences from ore geology, fluid inclusion and O-S isotopes".ORE GEOLOGY REVIEWS 126(2020):21. |
入库方式： OAI收割
来源：地质与地球物理研究所
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