| 姚鹏,梅燕雄,李光明,石洪召,张金良,钱利军.我国西南地区斑岩型铜矿床的分布、成因及其动力学背景[J].矿产勘查,2024,15(11):2099-2114 |
| 我国西南地区斑岩型铜矿床的分布、成因及其动力学背景 |
| Distribution， origin and its dynamic background of porphyry copper deposits in Southwest China |
| 投稿时间：2024-11-07 修订日期：2024-12-05 |
| DOI：10.20008/j.kckc.202411011 |
| 中文关键词: 西南地区 斑岩型铜矿 分布特征 成因探讨 地球动力学背景 |
| 英文关键词: Southwest China porphyry copper deposit distribution characteristics genetic discussion geodynamic background |
| 基金项目:本文受中国地质调查局项目“全国海陆矿产资源图件编制更新”（DD20221696）资助。 |
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| 中文摘要: |
| 笔者等在1∶100万西南地区矿产图幅编制工作的基础上，并结合前人的研究成果，提出西南地区的斑岩型铜矿在空间上可划分5个斑岩铜矿带：（1）冈底斯斑岩铜矿带；（2）多不杂—波龙斑岩铜矿带；（3）玉龙斑岩铜矿；（4）义敦—中甸斑岩铜矿带；（5）扬子西缘斑岩铜矿带。并对上述斑岩铜矿带从区域地质背景与矿床分布、含矿斑岩的地质地球化学特征、成矿物质来源等方面进行探讨。最后借助古大陆边缘成矿理论研究认为，斑岩型铜矿带含矿斑岩在化学成分上显示的“陆壳性”，同时又在微量、稀土元素上显示的“岛弧性”，暗示西南地区斑岩铜矿带的形成既受成矿物源控制，也受陆-陆碰撞过程所制约，最终是受到古陆边缘构造演化特征，即“重叠性”所控制。总结并论述了各带斑岩型铜矿床的成因，以及在海-陆变迁中的定位和成矿动力学背景。 |
| 英文摘要: |
| Based on the compilation of the 1∶1000000 mineral map of the Southwest region and combined with previous research results， the authors propose that the porphyry copper deposits in the Southwest region can be divided into five porphyry copper belts： （1） Gangdise porphyry copper belt； （2） Duobuza-Polong porphyry copper belt； （3） Yulong porphyry copper belt； （4） Yidun-Zhongdian porphyry copper belt； （5） Porphyry copper belt of western margin of Yangtze Craton. The authors discuss the regional geological background and ore deposit distribution， geological and geochemical characteristics of ore-bearing porphyries， and the source of ore-forming materials for these porphyry copper belts. Finally， using the theory of ancient continental margin metallogeny， it is suggested that the ore-bearing porphyries in the porphyry copper belts exhibit “continental crustal” characteristics in chemical composition， while showing “island arc” characteristics in trace and rare earth elements， indicating that the formation of the porphyry copper belts in the Southwest region is controlled by both the source of ore-forming materials and the process of continent-continent collision， ultimately being controlled by the characteristics of the evolution of the ancient continental margin structure， namely “overlapping”. The authors summarize and discuss the genesis of the porphyry copper deposits in each belt， as well as their location and metallogenic dynamics background during the transition from sea to land. |
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