秘鲁Chiclayo东部复式花岗岩基与IOCG矿床地质特征

秘鲁-智利海岸基岩带是全球著名的IOCG成矿带,成矿地质条件十分优越,发育大量富铁的铜金多金属矿床。为进一步查明秘鲁Chiclayo东部Gallinazo复式花岗岩基及与之有关的IOCG铜金多金属矿床地质特征,文章在总结分析前人成果资料的基础上,结合遥感图像解译分析,开展了野外地质调查、剖面测量、测试分析、综合研究等工作。结果表明该复式花岗岩基是一个由不同期次侵位、不同构造叠加的大型花岗岩基穹隆构造,为白垩纪侵位的一套基性－中酸性的钙碱性系列侵入岩,其周边矿化带集中分布,矿种及矿化类型较多。同时,总结出IOCG矿床找矿模型,为该区进行基础地质研究和找矿勘查等工作均具有重要的参考指导作用。

Geological characteristics of complex granite base and IOCG deposit in Eastern Chiclayo, Peru

The Peru-Chile coast bedrock belt is the world''s famous IOCG metallogenic belt. The metallogenic geological conditions are very superior, and a large number of iron-rich copper-gold polymetallic deposits are developed. In order to further ascertain the geological characteristics of the Gallinazo compound granite base in eastern Chiclayo, Peru and the related IOCG copper-gold polymetallic deposit, the article summarizes and analyzes the previous results and combines the interpretation and analysis of remote sensing images to carry out field geological surveys, Profile measurement, test analysis, comprehensive research, etc. The results show that the compound granite base is a large granite base vault structure emplaced by different stages and different structures. It is a set of basic-intermediate-acid calc-alkaline series intrusive rocks emplaced in the Cretaceous, and its surrounding mineralization belt is concentratedly distributed, and there are many types of minerals and mineralization. At the same time, the IOCG deposit prospecting model is summarized, and it has an important reference and guiding role for basic geological research and prospecting exploration in this area.