对闽北变质岩同位素年代信息合理使用的探讨

Discussion on Rational Usage of Isotopic Age Information from the Metamorphic Rocks in Northern Fujian

通过闽北变质岩中的大量同位素测年数据的评述,进一步阐明不同的同位素测年方法都具有各自的适用性和局限性。本文认为,不必因为某些不确切的同位素年龄与地质资料产生矛盾而放弃或中止地质上进一步探索,甚至不适当地夸大某些非真实年龄的地质意义,应仔细地剔除辨析测年数据及其样品的地质含义,扬长避短,以提取更多可利用的信息并努力寻求地质依据。

The numerous isotopic dating data from the metamorphic rocks in Northern Fujian are a great helpto the study of the geological chronology and basic geology in the area.The author expounded herein thefact that different isotopic dating methods have their different application and limitation after studying anumber of isotopic dating data from the metamorphic rocks in Northern Fujian.Although there is thecontradiction between some uncertain isotopic ages and geological data,the further exploration of geolo-gy mustn't be abandoned or interrupted,and the geological implication of some unreal isotopic agesmustn't be exaggerated unsuitably.Therefore,the data of isotopic dating age and geologic implication ofthe isotopic samples must be carefully selected and discriminated so as to collect more available informa-tion and manage to seek after more geological evidence.