| Iron, copper, and zinc isotopic fractionation in seafloor basalts and hydrothermal sulfides | |
| Zeng, Zhigang1,2,3,4; Li, Xiaohui1,4; Chen, Shuai1; de Jong, Jeroen5; Mattielli, Nadine5; Qi, Haiyan1,4; Pearce, Christopher6; Murton, Bramley J.6 | |
| 2021-06-01 | |
| 发表期刊 | MARINE GEOLOGY
 |
| ISSN | 0025-3227 |
| 卷号 | 436页码:16 |
| 通讯作者 | Zeng, Zhigang([email protected]) |
| 摘要 | Studies of the Fe, Cu, and Zn isotopic compositions of volcanic rocks and sulfides provide an important tool for understanding magmatic, hydrothermal, and alteration processes, thereby enabling the determination of both transition metal sources and the quantification of the petrologic environmental impacts of hydrothermal activities. In this study, the delta Fe-56 and delta Fe-57 values of the mid-ocean ridge basalts (MORBs) are higher than those of the seafloor hydrothermal fluids, while the reverse is true for the delta Zn-66 and delta Zn-68 values, suggesting that basalt-fluid interactions preferentially incorporate isotopically light Fe and heavy Zn into the fluids, resulting in the relative enrichment of heavier Fe and lighter Zn isotopes in altered basaltic rocks. Most of the delta Fe-56 values (1.96 to +0.11%) of the sulfide minerals are within the range of the vent fluids, but they are significantly lower than those of the MORBs and back-arc basin basalts (BABBs), suggesting that the Fe in the sulfides was mainly derived from the fluids. However, the majority of the chalcopyrite delta Fe-56 and delta Fe-57 values are higher than those of the sphalerite and pyrite. This suggests that high-temperature sulfide minerals are enriched in Fe-56 and Fe-57, whereas medium- and low-temperature sulfides are depleted in Fe-56 and Fe-57. Moreover, the delta Cu-65 (-0.88 to -0.16%) and delta Zn-66 (-0.39 to -0.03%) values of the sulfide minerals are significantly lower than those of the MORBs, BABBs, and fluids, suggesting that Cu-63 and Zn-64 were preferentially removed from the fluids and incorporated into the chalcopyrite and sphalerite, respectively. Consequently, vent fluid injection and deposition can cause the heavier Cu and Zn isotopic compositions of hydrothermal plumes, seawater, and sediments. |
| 关键词 | Fe-Cu-Zn isotopic fractionation Mid-ocean ridge basalts Seafloor hydrothermal sulfides Magmatic processes and ore formation |
| DOI | 10.1016/j.margeo.2021.106491 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[91958213]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020402]; National Program on Global Change and Air-Sea Interaction[GASI-GEOGE-02]; International Partnership Program of the Chinese Academy of Sciences[133137KYSB20170003]; Taishan Scholar Foundation of Shandong Province[ts201511061]; National Special Fund for the 13th Five Year Plan of COMRA[DY135-G2-01-02]; National Key Basic Research Program of China[2013CB429700] |
| WOS研究方向 | Geology ; Oceanography |
| WOS类目 | Geosciences, Multidisciplinary ; Oceanography |
| WOS记录号 | WOS:000652406000014 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/176793 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Zeng, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Seafloor Hydrothermal Act Lab, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, 7 Nanhai Rd, Qingdao 266071, Peoples R China 5.Univ Libre Bruxelles, Dept Geosci Environm & Soc, Lab G Time, CP 160-02, B-1050 Brussels, Belgium 6.Natl Oceanog Ctr, European Way, Southampton SO14 3ZH, Hants, England |
| 第一作者单位 | 中国科学院海洋研究所; 中国科学院海洋大科学研究中心 |
| 通讯作者单位 | 中国科学院海洋研究所; 中国科学院海洋大科学研究中心 |
| 推荐引用方式 GB/T 7714 | Zeng, Zhigang,Li, Xiaohui,Chen, Shuai,et al. Iron, copper, and zinc isotopic fractionation in seafloor basalts and hydrothermal sulfides[J]. MARINE GEOLOGY,2021,436:16. |
| APA | Zeng, Zhigang.,Li, Xiaohui.,Chen, Shuai.,de Jong, Jeroen.,Mattielli, Nadine.,...&Murton, Bramley J..(2021).Iron, copper, and zinc isotopic fractionation in seafloor basalts and hydrothermal sulfides.MARINE GEOLOGY,436,16. |
| MLA | Zeng, Zhigang,et al."Iron, copper, and zinc isotopic fractionation in seafloor basalts and hydrothermal sulfides".MARINE GEOLOGY 436(2021):16. |
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