Study On The Wentugaole Deformed Granite

Wentugaole deformed granite as the focus of this study includes two parts: Mesoproterozoic deformed granite,Devonian deformed granite.The study area is administratively belonged to the Ejina banner,and the earth is located in the northeastern part of the Tarim plate,east of the Heihe fault,south of the Yagan fault,and the north of the Engel Wusu ophiolite belt.Zhusilenghangwula Structural belt.In this paper,the petrographic,rock geochemistry and isotopic chronological characteristics of the Wentugaole granite and the surrounding rock are studied to discuss the rock type,diagenetic age,material source,tectonic setting and mineralization potentiality of the granite.The Mesoproterozoic deformed granites are dark red,Schistosity development,strong deformation,lithology mainly mylonite and mylonitized granite.The zircon U-Pb dating has a diagenetic age of 1426 ± 20 Ma,most of the rock is formed in the Mesoproterozoic.The Mesoproterozoic Deformed granites with high silicon,high potassium – middle potassium,Calc alkaline,weak aluminum,low Sr high Yb characteristics.Rare earth element distribution diagram was right-lean mode,medium negative Eu anomaly,Light rare earth fractionation is obvious and heavy rare earth is slightly fractionated.Loss of Sr,P,Ba,Ti.The rock type is the crust source S type,which is formed in the continental margin arc environment under the background of active continental margin.Devonian deformation granite is deep flesh red,local deformation,Schistosity development,lithology is monzonitic granite and mylonitized monzonitic granite.Zircon U-Pb dating obtain diagenetic age is early Devonian 416 Ma.The rock has the characteristics of high silicon,high potassium,Calc alkaline,weak aluminum,low Sr and high Yb.The rare earth elements show the right-lean mode,light rare earth fractionation is more obvious than heavy rare earth,and the total amount of rare earth is higher than that of the Mesoproterozoic deformed granites,With weak negative Eu anomalies and positive Ce anomalies.Loss of Sr,P,Ba,Ti.The rock type is crust source S-type,which is formed at the stage of the Syn-COLG to Post-COLG.The Mesoproterozoic deformed granite was the first discovery in the northeastern part of the Tarim plate,and combined with the mesoproterozoic collision in the Tarim plate to form the Precambrian base.It is speculated that Columbia supercontinent in the process of cracking has a micro-plate collage to the Tarim plate formed in the Mesoproterozoic deformed granite.The limestone ductile granit shear zone which caused the deformation of the Wentugale deformed granite has a high Au mineralization potential Devonian deformed granite may provide heat and ore-forming fluids for mineralization.