四川省九龙县中咀铜矿床地质特征及成因探讨

中咀铜矿床位于扬子地台西缘江浪变质核杂岩内,围岩为一套中元古界变质火山-陆源碎屑沉积岩。原岩经过多期次变形变质作用,韧性剪切带控制了蚀变带、矿化带和矿体的分布。包括中咀铜矿在内的"里伍式"铜矿床物质具有多来源、成矿作用具有多期次、多成因的特点,其主成矿作用为燕山期中高温热液交代充填成矿,成因上属于海相沉积-改造型矿床。成矿物质主要来源于含矿岩系本身,控矿构造主要为韧性剪切带和穹窿构造。

Geology and genesis of the Zhongzui copper deposit in Jiulong,Sichuan

The Zhongzui copper deposit in Jiulong,Sichuan is located in the Jianglang metamorphic core complexes on the western margin of the Yangtze platform.The country rocks of the copper deposit consist dominantly of Mesoproterozoic metamorphic volcano-terrigenous clastic sedimentary rocks,and the primitive rocks have gone through multistage deformation and metamorphism.The distribution of the alteration zone,mineralization zone and ore bodies is controlled by ductile shear zone.The copper deposit has polyphase and polygenetic origins of ore-forming matter,and resulted from the Yanshanian（143-135 Ma） mesothermal to hypothermal replacement,filling and mineralization.Genetically,it belongs to the reworked marine sedimentary deposit.The ore-forming matter is derived mainly from the autochthonous ore-bearing rock series,and the ore-controlling structures are made up of ductile shear zones and dome structures.