新疆西天山果子沟地区开亚他斯火山机构及成矿潜力浅析

新疆西天山地区的早石炭世古火山机构是形成金矿床的重要构造。本文通过对新疆西天山果子沟地区开亚他斯古火山机构的形成时代、岩石类型、火山岩相、喷发旋回、喷发韵律、成矿条件的调查研究, 初步确定开亚他斯古火山机构形成于331Ma±2Ma(早石炭世), 为一套钙碱性系列岩石组合, 具有爆发相—喷溢相—爆发相的火山活动特征, 火山岩中金、锑、铋、锌、钼元素背景值较高, 有形成阿希火山岩型金床的成矿背景和潜力。 

ANALYSIS ON THE KAIYATASI VOLCANIC APPARATUS AND ITS METALLOGENETIC POTENTIALITY IN GUOZHIGOU AREA OF THE WESTERN TIANSHAN, XINJIANG OF CHINA

The Early Carboniferous volcanic apparatus is an important metallogenetic structure for formation of gold deposit in the Western Tianshan.A study on the formation time of the volcanic apparatus,rock types,volcanic facies,eruptive cycles and metallogenetic conditions shows that the volcanic apparatus was formed about 331Ma ago,associated with calc-alkaline series rocks,and bearing volcanic cycle from explosive facies to extrusive facies and then to explosive facies.The volcanic rock has a higher background values of Sb,Pb,Mo,Bi,Au,So,constituting a good conditions for formation of the volcanogenic massive sulfide deposit.