俄罗斯马加丹州库恰卡昌金矿成矿地质成矿条件探讨

Discussion on metallogenic geological and metallogenic conditions of kuchacachang gold deposit,Magadan,Russia

马加丹州库恰卡昌金矿区域位置位于鄂霍次克-楚科奇成矿带的边缘,矿石自然类型属砷黄铁石英脉型和蚀变岩型,矿石工业类型为石英脉型和蚀变岩型两种。矿石组成简单,金矿物呈中细粒嵌布。矿石主要为压碎、包裹结构,脉状、网脉状和块状构造。金矿体主要赋存在穿插于早白垩世花岗闪长岩中的石英脉以及构造蚀变岩,矿体的围岩即为花岗闪长岩,矿体与围岩的界线清楚,部分矿体与围岩为渐变关系。主要围岩蚀变有硅化、褐铁矿化、黄铁矿化、铅锌矿化、绿帘石化、碳酸盐化等。矿体中的夹石不多,对矿体的局部完整性产生一定影响。

The kuchacachang gold deposit in Magadan Prefecture is located at the edge of the Okhotsk ChuKeQi metallogenic belt.The natural ore types are as pyrite quartz vein type and altered rock type.The industrial ore types are quartz vein type and altered rock type.The ore composition is simple,and the gold deposits are distributed in medium and fine grains.The ore is mainly crushed and wrapped structure,vein,network vein and massive structure.The gold ore body mainly consists of quartz vein and structural alteration rock interpenetrating in Early Cretaceous granodiorite.The surrounding rock of ore body is granodiorite.The boundary between ore body and surrounding rock is clear,and part of ore body and surrounding rock are gradual relationship.The main wall rock alteration includes silicification,limonitization,pyritization,lead zinc mineralization,epidotization,carbonation,etc.There are not many rocks in the ore body,which has a certain impact on the local integrity of the ore body.