摘要
智利劳斯奎洛斯(Los Quilos)铜矿床赋存于下白垩统Los Chilcas单元钙碱性安山岩及安山质熔结角砾岩中,矿体呈脉状、似脉状、透镜状,形成群脉状分布的多个矿化中心。矿体受走滑剪切的NW向、SN向、NE向断裂控制,断裂及微裂隙的高渗透系统成为热液流体的流动通道和成矿空间。矿物组成主要为斑铜矿、辉铜矿,黄铜矿;以矿体为中心,内带为斑铜矿-辉铜矿-赤铁矿,外侧及向深部为黄铜矿及黄铁矿。区域蚀变普遍,有赤铁矿化、青磐岩化、钠化等;与铜矿化有关的蚀变作用为硅化、碳酸盐化或绿泥石化、赤铁矿化,钠化或钾化。找矿标志为中生界火山-沉积岩系、高渗透构造带、孔雀石化蚀变等特征。
Los Quilos copper deposit in Chile is located in alkaline andesite and andesitic welding breccia of Lower Cretaceous Los Quilos rock unit.Ore bodies are in vein,vein like bodies and lenses controlled by strike slip shear faults trending NW、SN、NE respectively.Ore veins occur in swamps and form multi-mineralization centers.High permeable fracture and micro-fracture system serves the ore fluid conduits and ore-forming space.Bornite,chalcocite and chalcopyrite are main minerals.Minerals occur in zones at ore body.Bornite-chalcocite-hematite is the inner zone and outward and to depth is chalcopyrite-pyrite zone.Regional alteration is common,such as hematitization,propylitizatition,albitization etc.The Cu-mineralization-related alterations are silicification,carbonation,chloritizatioon,hematitization,sodium and potassium alterations.Mesozoic volcanic-sedimentary rock sequence,high permeability zone and malachitization are the prospecting marks.
出处
《地质找矿论丛》
CAS
CSCD
2011年第1期85-89,118,共6页
Contributions to Geology and Mineral Resources Research
基金
财政部海外风险勘探基金项目和中色地科高新技术研发项目联合资助
