摘要
为进一步指导云南省香格里拉子尼铜矿床深部找矿工作,首先系统分析了矿区成矿地质背景及相邻矿区成矿规律;然后通过已施工的156个钻孔的岩芯编录及矿区地质填图,总结了矿体产出特征、控矿因素、蚀变特征等矿床地质特征;最后对矿床成因及深部找矿前景进行了探讨,结果表明:1子尼铜矿床矿体形态主要受断层破碎带控制,成矿物质由深部沿构造破碎带上升至浅部并在破碎带拐弯、变缓处成矿。2由甘孜—理塘洋壳俯冲至中咱陆块下产生的挤压断层既为控矿构造又为破矿构造,表明子尼铜矿的形成与义敦岛弧印支期—燕山期大规模构造-岩浆活动有关,贯穿整个破碎带的绿泥石化、绢云母化、硅化及碳酸盐化等中—低温热液蚀变特征表明矿区成矿流体为中—低温性质。3综合蚀变特征及构造特征认为,矿区深部上三叠统哈工组三段(T3ha3)与上三叠统哈工组二段(T3ha2)的岩性接触面、与断层有关的拐弯及断坪—断坡等位置成矿潜力巨大,是最有利于进一步勘探的部位。
In order to provide reference for the deep prospecting work of the Zini copper deposit,firstly,the regional oreforming geological background and the metallogenic regularity of the adjacent mining area are analyzed comprehensively; then,based on the core logging of the 156 drills that are already constructed and geological mapping of the mining area,the deposit geological characteristics such as ore-body occurrence characteristics,ore-controlling factors,alteration characteristics are summarized systematically; finally,based on the metallogenic geological background and deposit geological charactersitcs,the deposit genesis and deep prospecting prospect of the the Zini copper deposit are discussed in depth. The results show that： 1the morphology of the ore-body of the Zini copper deposit is mainly controlled by fault fracture zone,the metallogenic materials along the fault fracture zone from the deep to the shallow and mineralized in the corner of the fault fracture zone. 2the extruded fault that is the production of the subduction between Garze-Litang oceanic crust and the Zhongza block is not noly the ore-controlling fracture but also the destructive fracture,it show that the genesis of Zini copper deposit is closely related to the largescale tectono-magmatic activities of the Yidun island area Indo-Yanshan epoch,the middle-low temperature hydrothermal alteration characteristics of chloritization,sericitization,silicification and carbonatization which are throughout the fracture zone indicate that the ore-forming fluid with the middle-low temperature magmatic hydrothermal characteristics. 3Based on the alteration and structural characteristics,it is pointed out that the lithologic contact surface of the top part of the upper triassic Hagong formation（ T3ha3） and the middle part of the Hagong formation（ T3ha2） and the corner of the fault and the flat-ramp have great metallogenic potential,they can be regarded as the most favorable position for the further detailed exploration work.
出处
《金属矿山》
CAS
北大核心
2016年第3期107-112,共6页
Metal Mine
基金
国家自然科学基金项目(编号:41172077
41502079)
四川省教育厅自然科学重点项目(编号:15ZA0073)
四川省青年科技基金项目(编号:2014JQ0047)
中国地质调查局地质调查项目(编号:[资]03-002-0557
资[2014]01-028-042)
国家重点研究发展计划("973"计划)项目(编号:2011CB403103)
四川省矿产资源研究中心项目(编号:SCKCZY2013-YB006)
关键词
矿床地质特征
深部找矿
成矿规律
控矿因素
蚀变特征
矿床成因
成矿流体
Deposit geological characteristics
Deep prospecting
Metallogenic regularity
Ore-controlling factors
Alteration characteristics
Deposit genesis
Metallogenic fluid
