| The occurrence of gold in hydrothermal sulfide at Southwest Indian Ridge 49.6 degrees E | |
| Ye Jun1,2,3; Shi Xuefa1; Yang Yaomin1; Li Naisheng4; Liu Jihua1; Su Wenchao5; Shi, XF (reprint author), State Ocean Adm, Qingdao 266061, Peoples R China. | |
| 2012-11-01 | |
| 发表期刊 | ACTA OCEANOLOGICA SINICA
 |
| ISSN | 0253-505X |
| 卷号 | 31期号:6页码:72-82 |
| 文章类型 | Article |
| 摘要 | Massive sulfide precipitates found in the Southwest Indian Ridge (SWIR) 49.6A degrees E hydrothermal field are enriched in gold. Here, the mineralogy and mineral chemistry of these massive sulfides to constrain the process of gold precipitation were studied. Sulfide samples in this field include lower-temperature Zn-rich sulfides and relative higher-temperature Fe-rich sulfides. Zn-rich sulfides are dominated by sphalerite-pyrite-chalcopyrite assemblages, with concentrations of gold ranging from 9.08 to 17.0 A mu g/g. Fe-rich sulfides consist mainly of pyrite-marcasite-isocubanite assemblages, with gold concentrations from 2.17 to 3.79 A mu g/g. The significant enrichment in gold within the lower-temperature Zn-rich sulfides and the effective separation of Zn and Fe in hydrothermal precipitates at the surface of this field are here interpreted to reflect the strong temperature dependence of gold transportation and deposition within the sulfides. In Zn-rich samples, large amounts of isolated native gold grains were identified. They were found mainly as inclusions up to 8 A mu m in diameter, occupying porous cavities in sphalerite or in the elevated iron content rim of sphalerite. The fineness of the gold ranged from 810 to 830. Unlike previously published results on other hydrothermal fields, these data show a low gold fineness values in SWIR 49.6A degrees E. The FeS content of sphalerite associated with gold grains ranged from 3.2 mole % to 18.9 mole %. This was higher than in other fields, indicating that the sulfur activity is relatively low during the gold precipitation process and that sulfur activity may be one of the main factors affecting gold fineness in the SWIR 49.6A degrees E hydrothermal field. Evidence regarding gold fineness and sulfur activity suggests that gold was quite likely transported as AuHS0 rather than as a Au(HS) (2) (-) complex. |
| 关键词 | Hydrothermal Sulfide Southwest Indian Ridge Occurrence Of Gold Mineralogy |
| 学科领域 | Oceanography |
| DOI | 10.1007/s13131-012-0254-4 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000312494000008 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/12520 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Shi, XF (reprint author), State Ocean Adm, Qingdao 266061, Peoples R China. |
| 作者单位 | 1.State Ocean Adm, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266007, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 4.Natl Oceanog Ctr, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ye Jun,Shi Xuefa,Yang Yaomin,et al. The occurrence of gold in hydrothermal sulfide at Southwest Indian Ridge 49.6 degrees E[J]. ACTA OCEANOLOGICA SINICA,2012,31(6):72-82. |
| APA | Ye Jun.,Shi Xuefa.,Yang Yaomin.,Li Naisheng.,Liu Jihua.,...&Shi, XF .(2012).The occurrence of gold in hydrothermal sulfide at Southwest Indian Ridge 49.6 degrees E.ACTA OCEANOLOGICA SINICA,31(6),72-82. |
| MLA | Ye Jun,et al."The occurrence of gold in hydrothermal sulfide at Southwest Indian Ridge 49.6 degrees E".ACTA OCEANOLOGICA SINICA 31.6(2012):72-82. |
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