Zoning Characteristics Of Feldspar And Magmatic Evolution Event From Bumusongrong Batholith Tibet

The center of zhe complex found in the giant patchy area with feldspar of Bumusongrong Zhongba Tibet.Zoning characteristics of Plagioclase is courrently the most representative of the discovery,Great research value.The focus of this work is crystallographic characteristics of the feldspar is studied,The characteristics of the feldspar distribution are identified.Bumusongrong moniliforme is characterized by a typical feature,it`s now found in the feldspar with the extremely rare giant ring belt minerals,porphyry crystal form is excellent and the annulus feature is extremely significant,it`s great significance to carry out typical research work,this can be studied with the feldspar from the micro-level to the macro level.and then from the macro to the micro,the discovery of such feldspar,and also for the study of the field of feldspar with a new direction.The study area is mainly exposed Late Cretaceous the coarse-grained plaque-like corners of the two-long granite,the main component of the belt in the rock is alkaline feldspar,the type of giant plagioclase porphyry is similar to the development of the same type,to albite-longer stone and farther stone and potash feldspar To the based,interbedded plagioclase is rare in the feldspar in the research area,mostly acidic or alkaline.In the giant crystal or matrix occasionally mosaic in the porphyry the alteration of the ring with plagioclase.The formation of sodium-potassium ring feldspar giant crystals,and plagioclase from the crystallization of the formation of positive ring mechanism is different.Inference of this component of the sudden change in the ring often accompanied by Supersaturated potassium fines and sodium frit strongly differentiated and mixing process,the early semi-solidified crystals are formed in the frit with varying amounts of potassium and sodium;it is also possible that the porphyrite is in an unequally crystalline stable imbalance system,feldspar speckle oscillation generated K and Na separation,aggregation process;the ring may also be a complete account of K-Na formation.The study area is very special with feldspar,unlike the plagioclase belt(mostly caused by An change),the area found in the giant crystal belt feldspar interior is generally light-colored sodium-rich acid plagioclase,it is rich Or potash feldspar.Magma mixing is a common phenomenon in nature,Rock geochemistry can only prove the presence of magma mixin.but difficult to show Details of the magma mixing process;Zoning of feldspar porphyries,Chemical composition and microstructure,A more complete record of the magma evolution process.Through the backflush images found in the highlighted minerals quantitative analysis of the probe,make sure the rock is rich in square thorium ore and crystalline uranium and other radioactive minerals,which provides the strongest evidence for the high-to-mineralization anomalies of uranium in the central-like plagioclase-like monolithic granite rock mass.Cracked uranium found in feldspar,which is of great significance to find granite type uranium deposit.Simultaneously,the crystalline uranium deposits are embedded in the feldspar,it is also possible to infer the environmental conditions of the evolution of the feldspar,this has a high research value and significance.