摘要
太平寨的古老岩石可以追溯到早太古时期,是我国迄今所测得同位素年龄中时代最古老的岩石。本文试图通过迁西太平寨迁西群下部上川组麻粒岩的稀土元素含量及分配型式,讨论该地区原岩的岩石成因及其大地构造含义。
Among the high grade metamorphic rocks of Taipingzhai,two types of basic granulites and their retrograded amphibolites can be recognized.According to the REE abundances and patterns,one type probably belongs to continental basalt and the other to alkaline basalt,of which the BEE content is up to 400 ppm,apparently riched in LREE.The coexistence of two types of the basalts implies the exsistence of an old continental rift structure.
作者
王凯怡
Wang Kaiyi(Institute of Geology,Academia Sinica,Beijing)
出处
《地质科学》
1982年第2期144-151,共8页
Chinese Journal of Geology(Scientia Geologica Sinica)
