扎日加变质核杂岩的确定及地质意义  

Redefinition and Geological Significance of Metamorphic Core Complex of Zarijia Area

作　　者：李建放[1,2] 陈丽娟[1] 任二峰[1] 常有英[1] 王国良[1] 马延景[1] 黄清华[1] 

机构地区：[1]青海省地质调查院,青海西宁810012 [2]青海省青藏高原北部地质过程与矿产资源重点实验室,青海西宁810012

出　　处：《西北地质》2012年第1期102-109,共8页Northwestern Geology

基　　金：青海省曲麻莱县扎日加地区四幅1:5万区域地质矿产调查(200817909)

摘　　要：产于北巴颜喀拉山扎日加地区的变质核杂岩具有典型的二层结构。由构造片岩、构造片麻岩、千枚岩等组成穹状背斜核,其中心为燕山期二长花岗岩体,盖层为巴颜喀拉山群浅变质砂板岩。核部与盖层之间为剥离断层。它的厘定表明巴颜喀拉沉积盆地下面存在中元古界的古老基底,并对大场金矿的成因类型提出了新的认识。Zarijia metamorphic core complex in the northern part of Bayankala Mountain has the typical double-layer structure. The dome anticline of the Zarijia metamorphic core complex consists of tectonic schist, tectonic gneiss and phyllite and the middle of the core is Yartshanian monzonitic granite. The cover layer consists of the low metamorphic sand-slate. There are stripping faults between the core part and the cover layer, showing that there exists Mesoproterozoic basement below the Bayankala sedimentary basin, and providing a new genetic type for the Dachang gold mine.

关 键 词：扎日加 变质核杂岩 剥离断层 二层结构 

分 类 号：P581[天文地球—岩石学]