阿尔金山中段高压-超高压带(含菱镁矿)石榴子石二辉橄榄岩的发现及其地质意义  

The discovery of magnesite-bearing garnet lherzolite of high-ultrahigh pressure belt and its geological significance in the middle section of Altgn Tagh

作　　者：校培喜[1] 王永和[1] 张汉文[1] 潘长利 孙南一[1] 

机构地区：[1]西安地质矿产研究所,陕西西安710054 [2]陕西地勘局区研院,陕西咸阳712000

出　　处：《西北地质》2001年第4期67-74,共8页Northwestern Geology

基　　金：中国地质调查局区域地质调查项目阶段性研究成果 ;项目编号 2 0 0 0 130 0 0 92 1

摘　　要：阿尔金山走滑断裂带位于青藏高原北缘 ,向东北与北山构造带相连 ,它斜切了塔里木板块和柴达木地块、东天山构造带和祁连构造带。新近在该构造带中段苏吾什杰一带发现了高压 -超高压岩石新类型——含菱镁矿石榴子石二辉橄榄岩 ,其与高压壳源型榴辉岩共生一起 ,为幔源型超高压变质岩构造侵位的产物。The strike-slip flauted zone of Altgn Tagh is located in the northern margin of Qinhai-Tibet plateau, and to northeast it links with Beishan mountain , and bevels Talim plate , Qaidam massif as well as structural zone of eastern Tianshan mountain and Qilian mountain respectively . A new type of high-ultrahigh pressure belt, garnet-lherzolite , is recently discovered in Sushijie where it is middle section of the strike-slip faulted zone. It coexists with high pressure eclogite of crustal source type. The authors consider that it is the product of tectonic emplacement of mantel source type.

关 键 词：阿尔金山 高压-超高压变质岩 石榴子石 橄榄岩 走滑断裂 

分 类 号：P588.3[天文地球—岩石学]