| Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge) | |
| Li, Bing1,2,3; Yang, Yaomin2,4; Shi, Xuefa2; Ye, Jun2; Gao, Jingjing2; Zhu, Aimei2; Shao, Mingjuan2,5; Yang, YM (reprint author), State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China. | |
| 2014-03-01 | |
| 发表期刊 | MARINE GEOPHYSICAL RESEARCH
 |
| 卷号 | 35期号:1页码:55-68 |
| 文章类型 | Article |
| 摘要 | Morphotectonic analysis of the inside corner intersection (14.0 degrees S) between the southern Mid-Atlantic Ridge and the Cardno fracture zone indicate a young rough massif emerging after the termination of a previous oceanic core complex. The massif, which hosts an off-axis hydrothermal field, is characterized by a magmatic inactive volcanic structure, based on geologic mapping and sample studies. Mineralogical analyses show that the prominent hydrothermal deposit was characterized by massive pyrite-marcasite breccias with silica-rich gangue minerals. Geochemical analyses of the sulfide breccias indicate two element groups: the Fe-rich ore mineral group and silica-rich gangue mineral group. Rare earth element distribution patterns showing coexistence of positive Eu anomalies and negative Ce anomalies suggest that sulfides were precipitated from diffused discharge resulted from mixing between seawater and vent fluids. Different from several low temperature hydrothermal systems occurring on other intersection dome-like massifs that are recognized as detachment fault surfaces associated with variably metamorphosed ultramafic rocks, the 14.0 degrees S field, hosted in gabbroic-basaltic substrate, is inferred to be of a high temperature system and likely to be driven by deep high temperature gabbroic intrusions. Additionally, the subsurface fossil detachment fault is also likely to play an important role in focusing hydrothermal fluids. |
| 关键词 | Southern Mid-atlantic Ridge Inside Corner Hydrothermal Activity Massive Sulfide Deposit Gabbroic Intrusion Oceanic Core Complex |
| 学科领域 | Geochemistry & Geophysics ; Oceanography |
| DOI | 10.1007/s11001-013-9209-1 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000332984900004 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/23799 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Yang, YM (reprint author), State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.State Ocean Adm, Natl Deep Sea Ctr, Qingdao 266061, Peoples R China 5.China Univ Geosci, Beijing 100083, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Li, Bing,Yang, Yaomin,Shi, Xuefa,et al. Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge)[J]. MARINE GEOPHYSICAL RESEARCH,2014,35(1):55-68. |
| APA | Li, Bing.,Yang, Yaomin.,Shi, Xuefa.,Ye, Jun.,Gao, Jingjing.,...&Yang, YM .(2014).Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge).MARINE GEOPHYSICAL RESEARCH,35(1),55-68. |
| MLA | Li, Bing,et al."Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge)".MARINE GEOPHYSICAL RESEARCH 35.1(2014):55-68. |
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