新疆阿舍勒块状铜-锌硫化物矿床的控矿条件和成因

Ore-controlling Factors and Origin of the Ashelei Massive Cu-Zn Sulfide Deposit, Altai, Xinjiang

阿舍勒块状铜-锌硫化物矿床产于中泥盆统阿舍勒组以英安质为主的钙碱性火山岩系中.矿化发生于中酸性火山喷发活动行将结束的阶段.矿床受岩性、火山穹丘和断裂控制.成矿物质主要来自火山岩浆热液、火山岩及海水.矿液主要由岩浆水和海水组成.矿床的形成经历了火山喷发沉积期、热液沉积充填期和矿床变质期.矿床是海底火山作用形成的热液沉积-交代充填成因的块状硫化物型矿床,可与黑矿型矿床对比.

The Ashelei massive Cu-Zn sulfide deposit occurs in Middle Devonian Ashelei Formation (being chiefly dactic calc-alkalic volcanic rock system). Mineralizations took place in the late stage of intermediate to acidic volcanic eruption activity. The deposit was controlled by lithological features, volcanic dome and faults. Ore-forming materials were chiefly derived from volcanic and magamatic hydrothermal solutions, volcanic rocks and sea water. The ore-fluid is mainly composed of magmatic water and seawater. The deposit, during its formation, had undergone following three stages: volcanoeruptivesedimentary. hydrothermal replacing-filling, and metamorphic. The deposit is a massive sulfide ore deposit of the volcanic hydrothermal sedimentary-metasomatic filling type formed by submarine volcanism, and bears a resemblance to the kuroko type ore deposits.