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1成矿地质背景西藏墨竹工卡县甲玛铜多金属矿床构造上位于冈底斯火山-岩浆弧东段,是最具代表性的世界级特大型多金属矿床。矿床内主要出露下白垩统林布宗组沙板岩和上侏罗统多底沟组灰岩,矿区岩浆岩主要呈脉岩产出,岩石类型包括花岗斑岩、黑云母二长花岗斑岩、花岗闪长斑岩、石英闪长玢岩、闪长玢岩、闪长岩、闪斜煌斑岩、角闪辉绿(玢)岩、石英辉长岩等,由于矿区岩浆活动频繁,成矿前后岩脉均很发育。矿
1 METALLOGENIC GEOLOGICAL BACKGROUND The Jiamagongjiama copper polymetallic deposit, located in the east part of the Gangdese volcano-magma arc, is the most representative world-class superlarge polymetallic deposit. The main deposits within the deposit are the Lower Cretaceous Linbuzong Formation slate and the Upper Jurassic Dadagou Formation limestone. The magmatic rocks in the deposit are mainly composed of vein rocks. The rock types include granodiorite porphyrite, Porphyry, granodiorite porphyry, quartz diorite, diorite porphyry, diorite, glitter lamprophyre, hornblende gabbro, quartz gabbro and so on. Because of the magma Activities are frequent, before and after mineralization are very developed dikes. mine