现代地质2024，Vol.38Issue(4)：1026-1042,17.DOI:10.19657/j.geoscience.1000-8527.2024.087
甘肃金川铜镍硫化物矿床成岩成矿构造观测及解析
Observation and Analysis of Diagenesis and Mineralization Structures of the Jinchuan Cu-Ni Sulfide Deposit in Gansu
摘要
Abstract
The Jinchuan giant Cu-Ni sulfide deposit in Gansu formed during the Neoproterozoic.From the ini-tial emplacement of its parent magma to subsequent tectonic superposition,this deposit has undergone a complex geological evolution.Despite the fact that many previous studies have been conducted,significant controversy regarding the tectonics of the deposits still remains.Furthermore,it is of great significance to clarify the rock-and ore-controlling structures for magma intrusion and its emplacement processes,as well as to prospect for ore deposits at depths.In this study,we analyzed the stress field based on the classification,correlation,cross-cut-ting relationships,and chronological sequence of structures in the deposit area,using nodal production statis-tics.In the end,we determined three primary compressive stress directions:N-S,NE-SW,and NNE-SSW.Finally,by integrating regional and mining tectonics,we concluded that there are six stages of tectonic evolution in the Longshoushan area:Lüliang,Jinning,Caledonian,Hercynian,Yanshan,and Himalayan.We also es-tablished a model of tectonic evolution for the Jinchuan Cu-Ni sulfide deposit,including the pre-,syn-,and post-mineralization stages.The model for the tectonic evolution of the Jinchuan Cu-Ni sulfide deposit illustrates the emplacement of parental magma to form the deposit,providing new insights into mineral prospecting in both within the deposit and in its periphery.关键词
甘肃金川/铜镍硫化物矿床/构造解析/构造演化Key words
Jinchuan,Gansu/Cu-Ni sulfide deposit/tectonic resolution/tectonic evolution分类
天文与地球科学引用本文复制引用
焦建刚,谭福,李林娜,刘健,杨兴科,高栋..甘肃金川铜镍硫化物矿床成岩成矿构造观测及解析[J].现代地质,2024,38(4):1026-1042,17.基金项目
国家自然科学基金项目(92162213) （92162213）
中国地质调查局"祁连—秦岭成矿带战略性矿产调查"项目(102202240090000000001) （102202240090000000001）
内蒙古自治区地质勘查基金项目(2020-KY05). （2020-KY05）
