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从不断发表的放射性年龄数据可以清楚地看出:多数地质学家和地质年代学家至今一直不太重视地质年龄数据的严格含义。严格地讲,矿物和岩石的放射性年龄是指冷却过程中放射成因核停止向系统外扩散的时间和温度,而不是指矿物和岩石结晶的时间。在深成火成岩层和变质岩层中,结晶到扩散过程结束之间有一段很长的时间间隔。在绝大多数情况下,都是简单地假定:十分精确
From the continuously published radioactive age data, it is clear that most geologists and geochronologists have so far failed to attach much importance to the strict meaning of geological age data. Strictly speaking, the radioactive age of minerals and rocks refers to the time and temperature at which radiogenic nuclei in the cooling process stop diffusing out of the system, rather than the time when the minerals and rocks crystallize. In the Chengcheng igneous and metamorphic strata, there is a long time interval between the crystallization and the end of the diffusion process. In the vast majority of cases, it is simply assumed: very precise