北淮阳东段几组铷锶等时线年龄及其区域地质意义

Rb Sr ISOCHRON AGE GROUPS OF ROCKS FROM THE EASTERN SECTOR OF NORTHERN HUAIYANG AND THEIR REGIONAL GEOLOGICAL SIGNIFICANCE

摘要: 采于北淮阳东段的４组全岩Ｒｂ－Ｓｒ等时线年龄表明：出露于金寨县李桥和肥西县防虎山的变质岩层为中元古界（１５９５～１７２６Ｍａ）；大别山北东缘变质表壳岩为晚元古代（７５９～８２２Ｍａ）佛子岭群成分

Abstract: Four whole rock Rb Sr isochron age groups of the rocks from the eastern sector of northern Huaiyang indicate that metamorphic rocks exposed at Liqiao,Jinzhai county,and Fanghushan,Feixi county,are middle Proterozoic in age （1595-1726Ma）,while metamorphosed supracrustal rocks on the northeastern margin of the Dabie Mountains are marked by the component rocks of the Foziling Group of late Proterozoic age （759-822Ma）.