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在1963年年底以前,已公布的中国岩浆岩类岩石和少数变质岩类岩石的绝对年龄数据接近150个,除五个铀-铅法数据外,其余都是钾-氩法的数据。其中前寒武纪的有50多个,绝大部分样品采自北方;古生代和中生代接近100个,大部分样品采自南方。1964年又公布了接近100个钾-氩法绝对年龄资料,本文除将这些数据列入附表外,还引用了未发表的11个数据,其中有六个是铀-铅法的测定结果。尽管已有数值还不够多,而且分布不基集中,但就这些资料,可以概括说明我国东部前寒武系分布地区主要的变质作用和岩浆活动时期,以及我国东部及西北地区古生代及中生代的岩浆活动时期。
Before the end of 1963, the published absolute age data of China’s magmatic rocks and a few metamorphic rocks approached 150, with the exception of the five uranium-lead data, which were all K-Ar data. Among them, there are more than 50 Precambrian samples, the vast majority of samples are collected from the north; the Paleozoic and Mesozoic nearly 100, the majority of samples taken from the south. Again in 1964, nearly 100 potassium-argon absolute age data were published. In addition to including these data in the attached table, this article also cited unpublished data of 11, six of which were the result of the uranium-lead assay. Although these values are not enough and their distribution is not concentrated, these data can give an overview of the main metamorphism and magmatic activity in the Precambrian distribution area in eastern China and the Paleozoic and Mesozoic magma in the eastern and northwestern regions of China Period of activity.