春都斑岩型铜矿围岩蚀变特征及找矿前景

春都铜矿床与普朗、雪鸡坪及红山等铜多金属矿床相邻，均位于甘孜一理塘蛇绿一混杂岩带西侧的义敦岛弧带南端．矿区已知铜矿体均赋存于印支期浅成一超浅成相的闪长玢岩、花岗闪长斑岩内，岩体构造裂隙较发育，岩石蚀变强烈，具有与典型斑岩型铜矿床类似的蚀变特征．矿化强度与蚀变类型有显著关系，钾硅化带的分布与矿化带空间分布关系最为密切．春都铜矿床是印支期甘孜一理塘洋向西俯冲造山晚期与超浅成斑（玢）岩密切相关的斑岩型铜矿床，矿区及外围具有较大的找矿潜力．

On Wall Rock Alteration Features of Chundu Porphyry Copper and Its Prospecting Perspective

Chundu copper deposit is adjacent to Cu polymetallic deposits in Pulang, Xuejiping and Hongshan which are all located in the southern section of Yidun island arc belt on the west of Ganzi-Litang ophiolitic melange zone. All the known Cu ores occur into the hypabyssal-super hypabyssal granodiorite porphyry and diorite porphyrite formed in the Indo-China epoch. With intensive tectonic fissures and alteration, the mineral rock has similar alteration feature with typical porphyry copper deposit. There is significant relationship between the mineralization intensity and alteration types, among which the most important one exists between the space distribution of the mineralization belt and K-silicification belt. Chundu copper deposit belongs to the porphyry copper deposit, which is closely related to super hypabyssal porphyry and porphyrite formed in the Indo-China epoch during the late orogenic process of the westward subduction of Ganzi-Litang Ocean Basin. There are good deposit prospective potential in the orefield and its surrounding areas.