| 长江中下游地区铜地球化学块体时间属性——来自碎屑锆石LA-ICP-MS U-Pb定年的证据 |
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| 关键词:Middle–Lower Yangtze River region copper geochemical block detrital zircon LA-ICP-MS zircon U-Pb dating |
| 基金项目:河北地质大学博士科研启动项目(编号: BQ2019058);国家重点研发计划项目“穿透性勘查地球化学技术”(编号: 2016YFC0600600);“覆盖区地球化学异常源示踪与判别”(编号: 2016YFC0600604);中国地质调查局地质调查项目“化学地球”大科学计划-“全球地球化学填图”(编号: 121201108000150005) |
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| 摘要: |
| Temporal Distribution of Copper Geochemical Blocks in the Middle–Lower Yangtze River Region: Evidence from Detrital Zircon LA-ICP-MS U-Pb Dating |
| A total of six copper geochemical blocks in the Middle–Lower Yangtze River region were delineated on the basis of composite stream sediment geochemical data. The detrital zircon LA-ICP-MS U-Pb dating technique was used to study the temporal properties of geochemical blocks for the first time. Four age peaks were identified in detrital zircon samples sampled in Cu1, Cu2 and Cu6 geochemical blocks, corresponding to Paleoproterozoic, Neoproterozoic, Early Paleozoic, and Mesozoic, respectively. The authors have reached the conclusion that geochemical blocks exist across the time, and substances in the range of geochemical blocks came from multiple geological events. It is believed that Neoproterozoic and Mesozoic geological bodies had important influence on the formation of copper geochemical blocks. It is shown that the ore-forming materials might have been transported into stream sediments through later weathering and dispersion. Mineralization information could be extracted by sampling stream sediments. |
| LIU Bin,WANG Xue-qiu,HOU Qing-ye.2020.Temporal Distribution of Copper Geochemical Blocks in the Middle–Lower Yangtze River Region: Evidence from Detrital Zircon LA-ICP-MS U-Pb Dating[J].Acta Geoscientica Sinica,41(6):835-850. |
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