摘要
东天山西滩金矿床是近年发现的重要金矿床。它具有较长的成岩成矿过程,石炭纪岛弧火山作用形成了矿体的围岩———安山岩(330 Ma) ,随后,特别是在碰撞造山期岩浆活动形成了英云闪长岩(293 Ma)、二长花岗斑岩(281 Ma) 、钾长花岗斑岩(266 Ma) 、流纹斑岩(256 Ma) 等。这种幕式发生的热动力,也导致288 ~285 Ma 青盘岩化及L1 号金矿脉276 Ma、L2 号含金贫矿脉261 Ma、热液爆破角砾岩244 Ma、L3 号金矿脉等成矿( 及相关热液活动) 演化过程( 大约持续44 Ma) 。工业金矿体是成矿流体热动力地质构造三者的最佳耦合。矿床属造山期低温浅成热液矿床。
Xitan gold deposit is an important one discovered recently in eastern Tianshan The gold deposit shows a long metallogenic process, the andesite(330 Ma) wallrock of gold orebody formed during arc volcanic activity in Carboniferous period, followed by, especilly during orogenic period, quartz mica diorite (293 Ma), monzonite granite prophyry (281 Ma), feldspar granite prophyry(266 Ma), liparite porphyry (256 Ma) formed in magmatic activity This episodic thermal power produced a metallogenic evolution (apr 44 Ma) of (288~285 Ma) blue alteration and L 1 gold vein (276 Ma) L 2 poor gold vein (261 Ma) hydrothermal explosion breccia (244 Ma) L 3 gold vein The metallogenesis of industrial orebody was link of orebearing fluid thermal power structure The deposit is an epithermal type of orogenic period [
出处
《西安工程学院学报》
1999年第4期6-10,共5页
Journal of Xi'an Engineering University
基金
国家305 科技攻关项目