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磷灰石地球化学特征及其对有色金属成矿的指示意义

Geochemical Characteristics of Apatite and Its Significance for Non-ferrous Metal Mineralization

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【作者】 土登次仁; 杨成业; 次仁欧珠;

【Author】 Thupten Tsering;YANG Cheng-ye;Tsering Ouzhu;College of Engineering, Xizang University;Regional Geological Survey Brigade, Tibet Bureau of Geology and Mineral Exploration and Development;

【通讯作者】 杨成业;

【机构】 西藏大学工学院; 西藏自治区地质矿产勘查开发局区域地质调查大队;

【摘要】 磷灰石作为一种重要的副矿物示踪剂,能够通过其独特的晶体结构记录岩浆-热液演化过程中的关键地球化学信息。本文系统回顾了磷灰石在有色金属成矿系统中的指示意义。磷灰石的挥发分含量是示踪流体盐度与金属迁移的关键指标,高Cl指示斑岩型矿床流体的高盐度特性;而稀土元素Eu异常则直接约束了岩浆的氧化逸度。在造山型金矿床中,Pb等微量元素的富集是含矿性判别的有效指标。在同位素应用方面,磷灰石U-Pb年代学可精确限定成矿时限,裂变径迹技术用于评估深部找矿潜力。但磷灰石对低温流体的敏感性仍是亟待解决的挑战。未来的研究应聚焦于高精度原位分析技术与机器学习的结合,以更准确地应用磷灰石区分原生和热液叠加信号。

【Abstract】 Apatite, as a crucial accessory mineral, incorporates and records key geochemical information during magmatichydrothermal evolution due to its unique crystal structure. This paper reviews the indicator significance of apatite in nonferrous metal mineral systems. The volatile content of apatite serves as a key proxy for fluid salinity and metal transport; notably, high Cl content indicates the high-salinity nature of porphyry ore fluids. The Eu anomaly in Rare Earth Elements(REEs) directly constrains the oxygen fugacity of magma. In orogenic gold deposits, the enrichment of trace elements, such as Pb, serves as an effective indicator of mineralization potential. Regarding isotopic applications, apatite U-Pb geochronology precisely constrains the timing of mineralization, while Apatite Fission Track(AFT) thermochronology is utilized to assess deep exploration potential. However, the sensitivity of apatite to low-temperature fluids(resetting) remains a critical challenge. Future research should focus on integrating high-precision in-situ analysis with machine learning to accurately distinguish primary magmatic signatures from superimposed hydrothermal signals.

【基金】 西藏大学国家自然基金配套经费(00061355/016)资助
  • 【文献出处】 世界有色金属 ,World Nonferrous Metals , 编辑部邮箱 ,2025年24期
  • 【分类号】P618.4
  • 【下载频次】21
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