【摘要】 本文首次对湖北省桐柏—大别地区花岗岩的长石铅同位素组成特征进行了研究,通过与华南两种不同成因类型花岗岩以及与邻区花岗岩的长石铅同位素组成特征对比,可得出如下两点结论:1)本区花岗岩的长石铅同位素组成反映出同熔型成因类型之特征;2)本区大地构造位置可能是华北地台的一部分。更多还原

【Abstract】 In this paper, the author studies the characteristics of feldspar lead isotopic compositions in granites from Tongbai-Dabie region of Hubei for the first, tune. In comparison with those of other two genetic types of gran-ites in South China and with those of granites in neighbouring regions, the author comes to conclusion that the genetic types of all granites in this region belong to syntexis type and that the geotectonics of this region may probably be part of North China platform.更多还原