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地球学报  2004 

新疆和静县乔霍特铜矿床成矿流体地球化学特征

Keywords: 地质地球化学,成矿流体,乔霍特铜矿,和静县,新疆

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Abstract:

乔霍特铜矿床位于伊犁中天山板块和塔里木板块碰撞对接带北侧的早古生代岛弧带。赋矿地层为上志留统巴音布鲁克组安山质火山岩，控矿构造为近EW向的脆性断裂。本文对该矿床流体包裹体的均一温度、盐度、稀土元素和氢氧同位素进行了测试。研究结果表明，乔霍特铜矿床的成矿温度为201～322℃，盐度叫(NaCI)eq为9．34％～17．26％；成矿流体主要来自海西晚期钾长花岗岩浆在结晶成岩过程中释放出来的岩浆水，成矿金属物质主要来自安山质火山岩。乔霍特铜矿床属于中温热液型矿床。

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