| 西藏多龙矿集区拿若斑岩型铜(金)矿床锆石和磷灰石地球化学特征及意义 |
| |
| 关键词:mineralization assessment apatite zircon mineral geochemistry Naruo Duolong Ore District |
| 基金项目:国家重点研发计划项目(编号: 2022YFC2905001); 国家自然科学基金项目(编号: 42230813); 中国地质调查局项目(编号: DD20230362); 四川省自然科学基金项目(编号: 2023NSFSC0798)和西藏自治区“十四五”时期科技重大专项(编号: XZ202401YD0006-02) |
| 作者 | 单位 | E-mail | | 张荣坤 | 中国地质科学院矿产资源研究所 自然资源部成矿作用与资源评价重点实验室, 北京 100037 | zhangrongkun609@126.com | | 杨欢欢 | 中国地质科学院矿产资源研究所 自然资源部成矿作用与资源评价重点实验室, 北京 100037 | | | 董玉杰 | 西藏自治区地质矿产勘查开发局第五地质大队, 青海格尔木 816000 | 494470932@qq.com | | 王 勤 | 成都理工大学地球与行星科学学院, 四川成都 610059 | | | 李 社 | 中铝西藏金龙矿业股份有限公司, 西藏拉萨 850000 | | | 李发桥 | 中国地质科学院矿产资源研究所 自然资源部成矿作用与资源评价重点实验室, 北京 100037 | | | 袁盛朝 | 中铝西藏金龙矿业股份有限公司, 西藏拉萨 850000 | | | 翟建军 | 中铝西藏金龙矿业股份有限公司, 西藏拉萨 850000 | | | 李宏伟 | 西藏自治区地质矿产勘查开发局第五地质大队, 青海格尔木 816000 | | | 张 琪 | 中国地质大学(北京)地球科学与资源学院, 北京 100083 | | | 陈守关 | 西藏自治区地质矿产勘查开发局第五地质大队, 青海格尔木 816000 | | | 付雪莲 | 成都理工大学地球与行星科学学院, 四川成都 610059 | |
|
| 摘要点击次数: 432 |
| 全文下载次数: 329 |
| 摘要: |
| Geochemical Characteristics and Significance of Zircon and Apatite in the Naruo Porphyry Cu (Au) Deposit in the Duolong Ore District, Tibet |
| The large-scale Naruo porphyry copper (gold) deposit is one of the important deposits in the Duolong Ore District, Tibet. Although previous studies have examined the diagenetic and metallogenic ages, source of ore-forming materials, genetic mechanism, dynamic background, and preservation conditions of the deposit, the research on geochemical characteristics of the evolution process of ore-bearing magma is still limited. Therefore, in this study, the laser ablation-inductively coupled plasma-mass spectrometry method was used to analyze trace element compositions of zircon and apatite in the ore-bearing rocks of the Naruo deposit. This analysis aimed to study the characteristics of the magma crystallization differentiation process, oxygen fugacity, and water content to explore the evolution characteristics of ore-bearing magmas and their implications for mineralization. Zircons from the ore-bearing rocks of the Naruo deposit showed strong positive Ce and moderate negative Eu anomalies, whereas apatite displayed strong negative Eu anomalies. The characteristics of the zircon and apatite trace elements indicated that the magma was formed in a continental arc environment and belonged to type I granitic rock. The Th/U, Ce/Sm, and Yb/Gd characteristics of zircon showed that zircon is affected by the co-crystallization of apatite and titanite from high temperature to low temperature. The ore-bearing magma of the Naruo deposit exhibited a higher water content and oxygen fugacity and had undergone a higher degree of evolution than the ore-barren magmas. The high oxygen fugacity of ore-bearing magmas may have been caused by SO2 degassing in sulfur-rich magmas and the re-emplacement or mixing of magmas. Zircon Dy/Yb<0.2, 10 000×(Eu/Eu*)/Y>7, and Ce4+/Ce3+>200 can effectively distinguish ore-bearing from ore-barren rocks in the ore district. The results of this study demonstrate that the trace element characteristics of zircon and apatite can effectively indicate the source area characteristics, crystallization history, and ore-forming potential of igneous rocks. |
| ZHANG Rongkun,YANG Huanhuan,DONG Yujie,WANG Qin,LI She,LI Faqiao,YUAN Shenchao,ZHAI Jianjun,LI Hongwei,ZHANG Qi,CHEN Shouguan,FU Xuelian.2025.Geochemical Characteristics and Significance of Zircon and Apatite in the Naruo Porphyry Cu (Au) Deposit in the Duolong Ore District, Tibet[J].Acta Geoscientica Sinica,46(4):726-744. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|