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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第45卷

期数:

2023年第05期

页码:

1049-1062

栏目:

庆贺汤中立院士从事地质工作七十周年专辑

出版日期:

2023-09-15

文章信息/Info

Title:

Bifurcate Magma Conduit of Jinchuan Super-large Ni-Cu-PGE Sulfide Deposit in Gansu, China and Its Implications for Deep Ore Prospecting

文章编号:

1672-6561(2023)05-1049-14

作者:

宋谢炎¹; 康 健¹; 隆廷茂¹; 2; 李晓栋¹; 2; 王永才³; 李德贤³; 艾启兴³; 卢建全³

(1. 中国科学院地球化学研究所 矿床地球化学国家重点实验室,贵州 贵阳 550081; 2. 中国科学院大学,北京 101408; 3. 金川集团股份有限公司,甘肃 金昌 737100)

Author(s):

SONG Xie-yan¹;  KANG Jian¹;  LONG Ting-mao¹; 2;  LI Xiao-dong¹; 2;  WANG Yong-cai³;  LI De-xian³;  AI Qi-xing³;  LU Jian-quan³

(1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou, China; 2. University of Chinese Academy of Sciences, Beijing 101408, China; 3. Jinchuan Group Co., Ltd., Jinchang 737100, Gansu, China)

关键词:

小岩体成大矿;  Ni-Cu-PGE硫化物矿床;  岩浆通道分枝;  成矿后断裂;  深部找矿;  甘肃

Keywords:

small intrusion forming large deposit;  Ni-Cu-PGE sulfide deposit;  bifurcate magma conduit;  post-mineralization fault;  deep ore prospecting;  Gansu

分类号:

P611

DOI:

10.19814/j.jese.2023.05063

文献标志码:

A

摘要:

甘肃金川超大型Ni-Cu-PGE硫化物矿床经过50多年的开采,在深边部寻找新的矿体,特别是富矿,以保持生产效率,已经成为当务之急,首先需要解决找矿方向问题。金川矿床的4个主要矿体不仅在空间上是相互独立的,空间分布格局还与矿区的成矿后断裂系统关系密切。在前人对各个主要矿体地质和地球化学特征、矿区断裂构造的系统分析和研究基础上,提出金川矿床的岩浆通道系统存在多个岩浆通道分枝,且每个分枝的启动时间不同,因此,每个矿体不仅成矿过程存在差异,也存在先后次序。在分析成矿后断裂对金川岩体和矿体空间分布状态的影响基础上,还对深部找矿潜力进行了分析,提出了深部找矿方向和策略。

Abstract:

After more than 50 years mining activities, deep prospecting for new orebodies rich in Ni and Cu become more and more important in Jinchuan super-large Ni-Cu-PGE sulfide deposit of Gansu, China. The 4 major orebodies of Jinchuan deposit are not connected each other, and location patterns of the orebodies have been affected by movement of the faults. On the basis of the studies on geology and geochemistry of these orebodies and the associated faults of Jinchuan deposit, the bifurcate magma conduit during the formation of Jinchuan deposit was identified. Branches of the bifurcate magma conduit develop and form the four major orebodies successively. Therefore, each individual orebody is formed by following a time sequence and has distinguishable features. The influence of post-mineralization faults on the spatial distribution of Jinchuan pluton and ore bodies was discussed; subsequently, potential and deep prospecting targets were also discussed.

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备注/Memo

备注/Memo:

收稿日期:2023-05-30; 修回日期:2023-07-22投稿网址:http:∥jese.chd.edu.cn/
基金项目:国家自然科学基金项目(42330807,42121003)
作者简介:宋谢炎(1962-),男,河北丰宁人,研究员,博士研究生导师,理学博士,E-mail:songxieyan@vip.gyig.ac.cn。

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更新日期/Last Update: 2023-10-15