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| DOI | 10.1016/j.jseaes.2024.106049 |
| Apatite and zircon geochemistry deciphers difference in the nature of ore-forming magma in the Bangpu porphyry Mo-Cu deposit, Tibet | |
| 发表日期 | 2024 |
| ISSN | 1367-9120 |
| EISSN | 1878-5786 |
| 起始页码 | 264 |
| 卷号 | 264 |
| 英文摘要 | The Bangpu deposit, located in the eastern part of the Gangdese Porphyry Copper Belt, Tibet, is a porphyry MoCu deposit in a continental collisional orogenic belt. Cu and Mo mineralization occurred separately in the Bangpu deposit. Mo (Cu) mineralization occurred mainly in the monzogranite porphyry (MP), while Cu (Mo) mineralization occurred mainly in the diorite porphyry (DP). The cause of such spatial differences in Cu and Mo mineralization in the Bangpu deposit remains unclear. In this study, the mineral chemistry of apatite and zircon was investigated to reveal the differences in the nature of ore -forming magma between Cu (Mo) and Mo (Cu) mineralization in the Bangpu deposit. The chondrite-normalized REE patterns of the apatite grains from the MP were enriched in LREEs with negative Eu anomalies, whereas those from the DP and biotite monzonitic granite (BM) had strong negative Eu anomalies with no obvious differentiation between LREEs and HREEs. The DP, MP, and BM have a low TTiZ range from 657 C-degrees to 917 C-degrees and a high AST range from 687 degrees C to 1079 C-degrees. The zircon grains from the DP and MP had different Th/U ratios and TTiZ values, indicating that these porphyry samples probably experienced different magma crystallization or crystal fractionation histories. The zircon Ce4+/Ce(3+ )and Eu/Eu* ratios indicate that the ore -bearing DP and MP have higher oxygen fugacity than the BM. The F, Cl, and S contents in the apatite showed that the DP magmas were Cl- and S- rich, whereas the MP magmas magmas were F- and S- rich. The Bangpu porphyry Mo-Cu deposit results from two superimposed magmatic-hydrothermal systems. Mo was mainly partitioned into the F -rich magmatic-hydrothermal system released from the MP, and Cu was mainly partitioned into the Cl-rich magmatic-hydrothermal system released from the DP. Our results show that zircon and apatite geochemistry can be used to explain the spatial distribution of Cu and Mo mineralization in porphyry Cu-Mo systems. |
| 英文关键词 | Porphyry Mo deposit; Apatite and zircon chemistry; Cu and Mo separation; Bangpu; Tibet |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001184780900001 |
| 来源期刊 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/287838 |
| 作者单位 | Southwest University of Science & Technology - China; China Geological Survey; Chinese Academy of Geological Sciences; China University of Geosciences; Chengdu University of Technology; Southwest Jiaotong University |
| 推荐引用方式 GB/T 7714 | . Apatite and zircon geochemistry deciphers difference in the nature of ore-forming magma in the Bangpu porphyry Mo-Cu deposit, Tibet[J],2024,264. |
| APA | (2024).Apatite and zircon geochemistry deciphers difference in the nature of ore-forming magma in the Bangpu porphyry Mo-Cu deposit, Tibet.JOURNAL OF ASIAN EARTH SCIENCES,264. |
| MLA | "Apatite and zircon geochemistry deciphers difference in the nature of ore-forming magma in the Bangpu porphyry Mo-Cu deposit, Tibet".JOURNAL OF ASIAN EARTH SCIENCES 264(2024). |
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