Fluid inclusion and He-Ar isotope evidence for subsurface phase separation and variable fluid mixing regimes beneath the Yonaguni Knoll IV hydrothermal field, SOT
文献类型：期刊论文
| 作者 | Yang, Zhifeng2; Zhai, Shikui2; Yu, Zenghui2; Su, Fei1 |
| 刊名 | MARINE GEOLOGY
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 441页码:13 |
| ISSN号 | 0025-3227 |
| 关键词 | Fluid inclusion Helium isotopes Yonaguni IV Okinawa Trough |
| DOI | 10.1016/j.margeo.2021.106630 |
| 英文摘要 | The Okinawa Trough is a back-arc, initial marginal sea basin located behind the Ryukyu trench-arc system. Pb-Zn-(Cu) mineralization associated with volcanism has been recognized more than 15 hydrothermal fields in this trough. Fluid inclusions and He-Ar isotopic compositions were studied in sulfide-sulfate chimneys at Yonaguni Knoll IV hydrothermal field, South Okinawa Trough. Studies of fluid inclusion in sphalerite, anglesite and barite indicate formation temperatures between 220 degrees C and 357 degrees C and varying fluid salinities (1.9 to 8.55 equiv. wt% NaCl) that fall within the range observed at modern active mid-ocean ridge hydrothermal fields. The trapping temperatures heterogeneity and wide variations in salinities of partial fluid inclusions reveal phase separation and fluid mixing beneath the seafloor. The resulting brine favored the release and transportation of additional metal ions besides Pb and Zn and led to a complex mineralization at higher levels. The He-3/ He-4 ratio values (1.5 to 6.6Ra) of co-existing minerals also suggest a mixing fluid source, which can be calculated that basaltic magma He and seawater He mixed in varying degrees, with the proportions of basaltic magma He varied from 36% to 80% during the crystallization of sphalerite. Even in barite, the proportion of basaltic magma He can reach similar to 6%, supporting the contribution of the mantle He to the hydrothermal fluid. Anglesite-hosted fluid inclusions indicate that the existence of multiple hydrothermal fluid reservoirs in the sub-seafloor where the accumulation and migration of the hydrothermal fluid caused the rocks and terrigenous sediments to be altered intensely and promoted the lateral migration and mineralization of hydrothermal fluid under the seafloor. |
| WOS关键词 | MASSIVE SULFIDE DEPOSITS ; FREEZING-POINT DEPRESSION ; CENTRAL OKINAWA TROUGH ; VOLCANIC-ROCKS ; NOBLE-GASES ; IHEYA-NORTH ; VHMS MINERALIZATION ; MICROBIAL COMMUNITY ; HELIUM-ISOTOPES ; MAGMATIC FLUID |
| 资助项目 | National Key Basic Research Program of China[2013CB429702] |
| WOS研究方向 | Geology ; Oceanography |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000697734600021 |
| 资助机构 | National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102686]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhai, Shikui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 2.Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Zhifeng,Zhai, Shikui,Yu, Zenghui,et al. Fluid inclusion and He-Ar isotope evidence for subsurface phase separation and variable fluid mixing regimes beneath the Yonaguni Knoll IV hydrothermal field, SOT[J]. MARINE GEOLOGY,2021,441:13. |
| APA | Yang, Zhifeng,Zhai, Shikui,Yu, Zenghui,&Su, Fei.(2021).Fluid inclusion and He-Ar isotope evidence for subsurface phase separation and variable fluid mixing regimes beneath the Yonaguni Knoll IV hydrothermal field, SOT.MARINE GEOLOGY,441,13. |
| MLA | Yang, Zhifeng,et al."Fluid inclusion and He-Ar isotope evidence for subsurface phase separation and variable fluid mixing regimes beneath the Yonaguni Knoll IV hydrothermal field, SOT".MARINE GEOLOGY 441(2021):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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