青海祁漫塔格东沟花岗岩带闪长质包体的成因  

The formation of granite band with dioritic enclaves at Donggou of Qimantage area of Qinghai

作　　者：任晋祁[1,2] 王钦元[1,2] 张金明[1,2] 许海全[1,2] 张志清[1,2] 

机构地区：[1]青海省地质调查院,青海西宁810012 [2]青海省地质调查院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：《青海大学学报（自然科学版）》2012年第5期55-59,共5页Journal of Qinghai University(Natural Science)

基　　金：中国地调局资助项目(1212010781056)

摘　　要：东昆仑西祁漫塔格地区东沟一带,发育一套成分演化序列的早三叠世花岗岩体,通过系统1∶5万区调工作,对该岩体进行了详细的研究和划分,建立了早三叠世西沟口序列的谱系填图单位,其似斑状二长花岗岩岩体中的局部地段出现大量闪长岩类包体,经对似斑状二长花岗岩和闪长质包体岩石学、矿物学、岩石地球化学等详细研究发现,二者在成因上具联系性,演化上具亲缘性,闪长质包体是不混溶包体。In the Donggou vicinity of Qimantage area,west of East Kunlun,there is a set of compositional evolution sequence Early Triassic granitic plutons.By 1∶ 50 000 regional geological investigation,we carried out a detailed study and classification.Pedigree mapping unit of Early Triassic Xigoukou sequence was established.The Local section of Porphyritic monzogranite pluton presents a large number of diorite xenoliths.After a detailed study of petrology,mineralogy,geochemistry of homoporphyritic monzogranite and Dioritic enclaves,we found the two are closely related in genesis and with affinity in evolution.The dioritic enclave was immiscible inclusions.

关 键 词：早三叠世 似斑状二长花岗岩 闪长质包体 不混溶包体 祁漫塔格地区 

分 类 号：P588.12[天文地球—岩石学]