摘要
在对与峨眉山玄武岩有关的铜矿、金矿的地质特征进行对比的基础上,结合有关专家对区内单矿种矿床同位素测试研究成果,建立起Cu-Au矿床的时-空谱系,进而探索其综合成矿模式:加里东晚期—海西早期,发生了地幔上隆,引发峨眉山玄武岩浆上涌喷溢,带来了丰富的铜、金成矿物质,不但在玄武岩及凝灰岩内形成了原位的铜、金矿化,亦为岩浆期后上覆层控型铜、金矿成矿提供了最主要的物源;印支—燕山期,强烈的燕山运动产生构造热液驱动效应,导致热液将初始含矿层中的主成矿元素萃取后沿断层、裂隙向上迁移,在容易造成压力和化学势变化的有利部位,铜、金富集就位,进一步富集形成矿体。
Based on comparison of geological features of the copper and gold deposits related to Emeishan basalt, combining with isotopic geochronologies from individual deposit done by predecessors, the authors established a spatial-temporal framework and a metallogenic model for these deposits. It was shown that the Emeishan basalts erupted and upwelled because of mantle uplifting during Late Caledonian to Early Hercynian. They carried significant Cu and Au, which not only formed Cu-Au mineralization in basalts and tuffs, but also provided important source for post-volcanism stratabound Cu-Au deposits. Copper and gold leached by hydrothermal fluids in the volcanic protores would migrate along faults and fractures, which were driven by structural-thermal driven effects in Indosinian and Yanshanian. They would subsequently precipitate in favorable locations where were abrupt changes of structure and chemical potential. Cu and Au enriched in it, and finally ore bodies formed.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2010年第4期821-827,共7页
Journal of Jilin University：Earth Science Edition
基金
国土资源部国土资源大调查项目(200310200036)
中国地质调查局新类型矿产资源潜力评价项目(1212010535803)
关键词
铜矿
金矿
峨眉山玄武岩
滇黔邻区
copper deposit
gold deposit
Emeishan basalt
the border area between Yunnan and Guizhou
