| The West Kunlun orogenic belt,which are located in the northwestern part of the Qinghai-Tibet Plateau,It adjoins Tarim Plate on the northward,connects the Qiangtang block with Karakorum Fault on the southward.Altyn Tagh comparts Western Kunlun Orogen streches into Iran and Pakistan along the Pamir Mountain Area.It is the important part of Central Orogenic Belt of China,has complicated tectonic evolution process,and the important belt on which people research the uplifting and evolution of Qinghai-Tibet Plateau.Because West Kunlun orogenic belt has a cold and oxygen,poor natural conditions,and the traffic is extremely inconvenient,field geological survey work is very difficult.Overall,the degree of geological research area is relatively low.Therefore,our study in this region will help us better understand the formation process of the Qinghai-Tibet plateau and the structure transformation here.Satula rock group A group gneiss of high-alumina,potassium-rich features,trace elements granitoid-primitive mantle normalized spider diagram can be seen,most of the sample has a Ba,Sr loss,P enrichment,Ti strongly depleted.The overall rare earth elements presented LREE enrichment,HREE flat characteristics.Chondrite-normalized rare earth element distribution curve can be seen,the overall curve tilted to the right,and almost parallel to each curve,no abnormal Ce,Eu negative anomaly on the middle.Use protolith discrimination diagrams can be drawn match Tula rock group A to group gneiss original rock greywacke,shale sandstone,some have igneous information.Satula rock group A group of major elements,trace elements,rare earth elements characteristics,combined with the original rock discrimination diagram,which can distinguish the original rocks are mainly based acidic igneous-sedimentary rock composition,sedimentary rock in which the mud sandstone,its tectonic setting of the active continental margin and continental island arc. |
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