鄂拉山查查香卡地区晚三叠世火山岩产出环境分析  

Analysis of Environment for Late Triassic Volcanic Rocks in Chachaxiangka,Elashan

作　　者：芦文泉[1] 童海奎[1] 仓索南尖措 马永胜 

机构地区：[1]青海省国土资源勘查项目管理中心,青海西宁810001 [2]青海省第四地质矿产勘查院,青海西宁810001

出　　处：《西北地质》2012年第1期48-55,共8页Northwestern Geology

基　　金：中国地质调查局地质大调查项目"青海省地质找矿工作跟踪研究"(121201140119)

摘　　要：通过对查查香卡地区晚三叠世火山岩岩石学研究,确定该套火山岩属晚三叠世鄂拉山组,属钙碱性系列。喷出时的大地构造环境为陆内造山环境,该火山岩最初可能形成于大陆边缘环境,由于A型俯冲构造活动,测区乃至鄂拉山地区产生一系列右旋走滑断裂带,受北西向右旋走滑断裂的影响,岩石孔隙加大,并出现强烈的热流活动,导致岩浆沿这些断裂带喷出地表。Through study on Petrology of the Late Triassic volcanic rocks from Chachaxiangka area, the volcanic rocks belong to Elashan Formation and are calc- alkaline series. Considering the tectonic setting of intra-continental orogenic environment, the Late Triassic volcanic rocks initially may form in the continen- tal marginal environment. Researched area and even Elashan area produced a series of right rotary sliding fault zone because ＂A＂ type subduction. Affected by northwestern Right-lateral strike slip fault zone, rock pore increased and strongly heat flow activities appears coursing magma spray out surface along these fault zone.

关 键 词：岩石学 陆内造山 构造环境 东昆仑晚三叠世火山岩带 查查香卡 

分 类 号：P588.14[天文地球—岩石学]