Textural and chemical evolution of magnetite from the Paleozoic Shuanglong Fe-Cu deposit: Implications for tracing ore-forming fluids
文献类型：期刊论文
| 作者 | Zhang, Shuanliang5,6; Chen, Huayong3,4,5,6 ; Xiao, Bing6; Zhao, Liandang2; Hu, Xia1; Li, Jianping6; Gong, Lin5,6
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| 刊名 | AMERICAN MINERALOGIST
 |
| 出版日期 | 2023 |
| 卷号 | 108期号:1页码:178-191 |
| 关键词 | IRON OXIDE-APATITE EASTERN TIANSHAN CONSTRAINTS NW CHINA CONSTRAINTS AQISHAN-YAMANSU BELT LA-ICP-MS HYDROTHERMAL MAGNETITE ELEMENT COMPOSITION MAGMATIC EVOLUTION MINERAL CHEMISTRY SOUTH-AUSTRALIA |
| ISSN号 | 0003-004X |
| DOI | 10.2138/am-2022-8400 |
| 英文摘要 | The Aqishan-Yamansu belt in Eastern Tianshan (NW China) hosts several important Fe and Fe-Cu deposits, the origin of which is the subject of considerable debate. The coexistence of various types of ore-forming fluids makes it difficult to distinguish the genesis of the Fe-Cu deposits. We present detailed textural and compositional data on magnetite from the Paleozoic Shuanglong Fe-Cu deposit to constrain the formation of iron oxides and the evolution of the ore-forming fluids and thus define the genesis of the Fe-Cu ores. Based on the mineral assemblages and crosscutting relationships of veins, two mineralization stages were established, including the early Fe mineralization and late Cu mineralization stage. Three types of magnetite, i.e., platy (MA), massive (MB), and granular (MC) magnetite occur in the Fe mineralization. Backscattered electron (BSE) images identified display oscillatory zoning in an early hematite and transformational mushketovite phase (MA-I), characterized by abundant porosity and inclusions, as well as two later generations, including an early dark (MA-II, MB-I, and MC-I) and later light magnetite (MA-III, MB-II, and MC-II). The MA-I has extremely high W contents and mostly displays as micro- and invisible scheelite inclusions, which were probably caused by the W expulsion during mushketovitization. The texture and composition of magnetite suggest that the later light magnetite formed via dissolution and reprecipitation of the precursor dark magnetite, and the temperature and oxygen fugacity of fluids decreased over time. Our study also shows the MB-II magnetite and coexisting chlorite display synchronous oscillatory zoning, with the calculated temperature from 444 to 212 °C. Such variations could indicate the incursion of external low-temperature fluids with high salinity, which can dissolve the primary dark magnetite. This study provides a good example of using magnetite to trace the complex evolution and multiple sources of ore-forming fluids. ? 2023 De Gruyter. All rights reserved. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000923813700015 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80244]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 作者单位 | 1.CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Anhui, 230026, China 2.School of Earth Science and Resources, Chang'an University, Xi'an; 710054, China 3.Guangdong Provincial Key Laboratory of Mineral Physics and Materials, 511 Kehua Street, Guangzhou; 510640, China 4.CAS Center for Excellence in Deep Earth Science, Guangzhou; 510640, China 5.University of Chinese Academy of Sciences, Beijing; 100049, China 6.Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China |
| 推荐引用方式 GB/T 7714 | Zhang, Shuanliang,Chen, Huayong,Xiao, Bing,et al. Textural and chemical evolution of magnetite from the Paleozoic Shuanglong Fe-Cu deposit: Implications for tracing ore-forming fluids[J]. AMERICAN MINERALOGIST,2023,108(1):178-191. |
| APA | Zhang, Shuanliang.,Chen, Huayong.,Xiao, Bing.,Zhao, Liandang.,Hu, Xia.,...&Gong, Lin.(2023).Textural and chemical evolution of magnetite from the Paleozoic Shuanglong Fe-Cu deposit: Implications for tracing ore-forming fluids.AMERICAN MINERALOGIST,108(1),178-191. |
| MLA | Zhang, Shuanliang,et al."Textural and chemical evolution of magnetite from the Paleozoic Shuanglong Fe-Cu deposit: Implications for tracing ore-forming fluids".AMERICAN MINERALOGIST 108.1(2023):178-191. |
入库方式： OAI收割
来源：广州地球化学研究所
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