<正>AfterstudyingsystematicallyPetrology,Mineralogy,Petrochemistry,REEgeochemistryandstrontium,sulphur,leadisotopeofthealkali-richgraniteprophyrydistribuledextensivelytheYangtzeplatfromwesternmargin’salkali-richgraniteporphyrywepointoutthatthealkali-richgraniteporphyryhavethepropertiesofnewintrusiveages,Rangeoftheisotopeageisform36Mato51Ma,theybelongtotheHimalayadate,Mainmineralcomponetsofthealkali-richgraniteporphyryconsistofk-fcldspar(35~45x),quartz(36x±)plagioclase(15x±)andbiotitc(10x±).Accessorymineralsoftherockbelongtotypeof
