Mineralogy, geochemistry, and sulfur isotope characteristics of sediment-hosted hydrothermal sulfide minerals from the southern Okinawa Trough
文献类型：CNKI期刊论文
| 作者 | Yamin Yang; Zhigang Zeng; Xuebo Yin; Xiaoyuan Wang; Shuai Chen; Haiyan Qi; Zuxing Chen; Bowen Zhu |
| 发表日期 | 2021-10-15 |
| 出处 | Acta Oceanologica Sinica
 |
| 关键词 | mineralogy sulfur isotopes sediment-hosted hydrothermal sulfides southern Okinawa Trough |
| 英文摘要 | Studies of the mineralogy and sulfur isotope composition of sediment-hosted hydrothermal sulfide minerals in cores are important for understanding the seafloor mineralization environment and material source and reconstructing the hydrothermal history. However, the source of ore-forming materials and the history of hydrothermal activity in the southern Okinawa Trough(SOT) remain unclear. Here, the mineralogy and sulfur isotope characteristics of sulfides from gravity core HOBAB4-S2, collected between the Yonaguni Knoll IV hydrothermal field(HF) and the Tangyin HF, was investigated. Enrichments in Zn(up to 321×10-6), Cu(up to73.7×10-6), and Pb(up to 160×10-6) and the presence of pyrite, galena, pyrrhotite and minor sphalerite and chalcopyrite provide evidence for the input of hydrothermal materials into the sediments. The pyrite morphologies include disseminated cubic, pentagonal dodecahedron, and framboidal forms. Except for minor framboidal pyrite, euhedral pyrite from core HOBAB4-S2 is mainly of hydrothermal origin with Co/Ni ratios >1 and S/Fe atomic ratios <2 in the Cu-Zn-Pb-rich layers. The occurrences of hexagonal pyrrhotite, high-Co(up to0.17%) pyrite and high-Fe sphalerite indicate that the hydrothermal precipitates formed at medium-high temperatures and low-sulfur fugacity(f S2) environments. The δ34 S values of sulfides(0.21‰–3.45‰) with low-f S2 mineral assemblages(e.g., pyrrhotite ± high-Fe sphalerite) in the core are significantly lower than those of magmatic rocks and seawater, indicating possible incorporation of previously formed biogenic sulfur in the sediment. Combined with the age model of the core, it is suggested that hydrothermal activity likely began in the Tangyin HF before AD 1 445–1 483 and that at least three active episodes may have occurred since then. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | The National Natural Science Foundation of China under contract No. 91958213 ; the Strategic Priority Research Program of the Chinese Academy of Sciences under contract No. XDB42020402 ; the National Programma on Global Change and AirSea Interaction under contract No. GASI-GEOGE-02 ; the International Partnership Program of the Chinese Academy of Sciences under contract No. 133137KYSB20170003 ; the Special Fund for the Taishan Scholar Program of Shandong Province under contract No. ts201511061 ; the National Key Basic Research Program of China under contract No. 2013CB429700 |
| 卷 | v.40期:10页:133-147 |
| 语种 | 英文; |
| 分类号 | P736 |
| ISSN号 | 0253-505X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187624]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.LaboratoryforMarineMineralResources,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 2.KeyLaboratoryofMarineGeologyandEnvironment,InstituteofOceanology,ChineseAcademyofSciences 3.UniversityofChineseAcademyofSciences 4.CenterforOceanMega-Science,ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Yamin Yang,Zhigang Zeng,Xuebo Yin,et al. Mineralogy, geochemistry, and sulfur isotope characteristics of sediment-hosted hydrothermal sulfide minerals from the southern Okinawa Trough. 2021. |
入库方式： OAI收割
来源：海洋研究所
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