摘要
作为我国镍钴等战略金属的资源基地,金川铜镍(钴)硫化物矿床的深部找矿遇到“瓶颈”,已引起各方高度关注。本文基于近年来地质勘查成果,通过建模软件分析各矿体和构造的变化规律,系统总结了主矿体的深部赋存特征;梳理了金川深部找矿的难点——深部断裂构造变化趋势与成矿作用关系不清,提出“研究矿体(富矿)深部延伸变化判断含矿岩浆侵位方向,预测岩浆通道位置;研究断裂构造和成矿作用关系,构造与物化探信息结合来预测潜在矿体位置”的找矿思路,提出“断裂构造是形成金川矿床重要因素,含矿岩浆在脉动型构造运动作用下上侵形成金川矿床,其附近出现花岗斑岩脉或辉绿岩脉,与深部隐伏富矿体或致密块状特富矿体密切相关”的科学认识。采用深部构造变化、矿体赋存规律及物探等综合信息预测方法,分析了金川矿床深部及外围找矿潜力,为下一步地质找矿设计和找矿规划提供依据。
As a resource base of strategic metals such as nickel and cobalt in China,the deep prospecting of Jinchuan copper-nickel(co-balt)sulfide deposit has become a'bottleneck',which has attracted more and more attention from all parties.Based on recent geologi-cal exploration achievements,this paper analyzes the variation law of ore-bodies and structures under the modeling software,and sys-tematically summarizes the deep occurrence characteristics of the main ore-bodies.Sorting out the difficulties in deep ore exploration in Jinchuan"the change trend of deep fault structure and the unclear relationship with mineralization".It is clearly proposed to study the deep extension change of ore-bodies(rich ore)to judge the emplacement direction of ore-bearing magma and predict the location of magma channel;The relationship between fault structure and mineralization is studied,and the prospecting idea of combining structur-al and geochemical exploration information to predict the location of potential ore bodies is predicted.The study shows that"the fault structure is an important factor in the formation of Jinchuan deposit;various types of ore-bearing magmas invade into form the existing Jinchuan deposit under the action of pulsating tectonic movements;and the granite porphyry veins or diabase veins appeared near it,which is closely related to the deep concealed rich ore-body or massive ultra-rich ore-body".By using comprehensive information pre-diction methods such as deep structural change,ore-body occurrence pattern,and geophysical prospecting,the exploration potential of Jinchuan deposit in the deep and peripheral areas was analyzed.It is believed that there is still great prospecting potential in the deep area.Those provide the basis for the next geological prospecting design and geological prospecting planning.
作者
高亚林
何敏
贺耀文
李辉
赵宏斌
周涛
GAO Yalin;HE Min;HE Yaowen;LI Hui;ZHAO Hongbin;ZHOU Tao(National Key Laboratory of Ni&Co Associated Minerals Resources Development and Comprehensive Utilization,Jinchang 737100,China;Jinchuan Group Corporation,Ltd.Jinchang 737102,China)
出处
《铜业工程》
CAS
2023年第5期95-105,共11页
Copper Engineering
基金
国家自然科学基金项目(92162213,42330807)
教育部重点科研平台开放基金项目(300102273503)资助。
关键词
深部矿体
矿体特征
矿体成因
断裂构造
找矿潜力
ore-body in deep
characteristics of orebody
genesis of orebody
fault structure
prospecting potential
