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.
Zhang Changzhen Zhang Qi Jin Weijun Liu Xuelong Liu Xinyu Jian Runtang Luo Ying Yang Fucheng Wang Shuaishuai Yu Haijun. Can Archean TTG compare with Adakite? Global data gives results[J]. Chinese Journal of Geology, 2018, 53(4): 1254-1266.