摘要:文中收集了全球太古宙TTG 和后太古宙埃达克岩的数据，研究对比表明，太古宙TTG 不同于埃达克岩，早先学术界认为太古宙TTG 相当于现代的埃达克岩，是一个错误的见解，是一个伪命题。TTG 术语最早出现时并没有类似于埃达克岩的见解，后来发现了埃达克岩才引出二者类似的认识。为什么会出现这种见解？推测有两种可能：1）早先的研究均来自抽样的研究，即从典型到一般的推理方法。但是，抽样研究可能没有代表性。2）TTG平均值的误导，TTG 的Sr的平均值的确＞400×10-6，相当于埃达克岩，但是，通过分析TTG 全球数据表明，TTG 中的Sr含量变化很大，与埃达克岩没有关系。TTG 主要出现在太古宙，后太古宙很少；TTG 是太古宙岩石地壳的主体；而埃达克岩主要出现在后太古宙，是火山岩中很少的类型。这表明，TTG 和埃达克岩分别处于不同的构造体制。太古宙异常的热，可能还没有板块构造。太古宙的岩浆岩（包括TTG）即使与后太古宙某些岩浆岩具有类似的地球化学特征，可能也不能照搬现代板块构造的解释。?
关键词: TTG/
埃达克岩/
对比/
大数据/
太古宙/
后太古宙
Abstract:The data of the global Archean TTG and post-Archaean adakites are collected in this paper. The comparative study shows that Archean TTG is different from adakite, and earlier academics believed that Archean TTG is equivalent to modern adakite, and is a the wrong opinion, is a false proposition. The earliest TTG terminology did not appear to be similar to that of adakite, and later it was discovered that adakite had drawn similar understandings. Why do you see this kind of insight? Presumably there are two possibilities：1）Earlier studies all came from sampled studies, that is, from typical to general reasoning. It seems that sampling studies may not be representative. 2）The average value of TTG is misleading, and the average value of Sr in TTG is indeed ＞400×10-6, which is equivalent to adakite. However, if we look closely at the TTG global data, we find that the Sr content in TTG varies greatly and has no relationship with adakite. TTG mainly occurs in the Archean period, and there is a little in the post-Archean period; TTG is the main body of Archean granites; and adakite mainly occurs in the post-Archean and is a rare type in volcanic rock. It shows that TTG and adakite are in different tectonic system. The anomalous heat of the Archean means that there may not be plate tectonics yet. The Archean magmatic rocks（including TTG）may not be able to replicate the interpretation of modern plate tectonics, even if they have similar geochemical characteristics to certain magmatic rocks in the post-Archean period.?
Key words:TTG/
Adakite/
Contrast/
Big data/
Archean/
Post-Archean
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http://www.dzkx.org/data/article/export-pdf?id=geology_11490
