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最近,由于对华南加里东期花岗岩的讨论,也引起对花岗岩同位素年龄值的讨论,这是很自然的。这里就本人接触到的一些花岗岩体在应用同位素年龄资料时的点滴体会发表不成熟的意见,供参考。对花岗岩同位素年龄测试数据,依目前实验室的条件,在绝大多数情况下,只要取样符合要求,就应该予以肯定,这是毋需置疑的。然而,在应用数据确定岩体时代和解决地质问题时,问题不少,这主要是由于对岩体的野外地质特征和接触关系缺乏了解以及对测试年龄的矿物在岩石学、矿物学特征方面所作的室内研究工作较少,而过分地依赖同位素年龄来确定岩体时代。这样的例子可以列举很多,特别是在一
Recently, the discussion of the granite in South China also led to a discussion about the age of granite isotopes, which is quite natural. Here I come into contact with some granite body in the application of isotope age data bit by bit experience will be published immature advice for reference. According to the current laboratory conditions, the granite isotope age test data should be affirmed in the vast majority of cases as long as the sampling meets the requirements. This is beyond doubt. However, there are many problems in applying the data to determine the age of the rock mass and to solve the geological problems, mainly due to the lack of understanding of the geological characteristics and contact of the rock mass and the petrology and mineralogical characteristics of the minerals tested The indoor research work is less, but overly dependent on isotopic age to determine the rock age. There are many examples of this, especially one