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阿勒泰前寒武纪地层主要指分布于中、哈额尔齐斯带及其以北的冲乎尔—青河地区的古、中元古代克木齐群和分布于白哈巴—哈纳斯及北部山区的震旦纪哈巴河群。克木齐群为一套中深变质岩系,全岩Sm-Nd等时线年龄为1400±78Ma(胡锡琴等,1993),锆石、钾长石两阶段年龄中,t_1主要分布于1800 Ma左右,最大值为2483 Ma(何国琦等,1990);t_2主要分布于330～400 Ma之间。另据 E.B.贝贝科瓦对巴拉格杂岩(克木齐群东延部分,蒙古境内)中锆石的U-Pb测试,获得2800 Ma的年龄值,因此克木齐群中可能包含了部分太古
The Precambrian strata in Aletai mainly refer to the ancient and middle Proterozoic Kikuchi groups distributed in the middle and the Haxiqi belt and the Chong’er-Qinghai area north of it and the northern part of Bahaba-Hanas and the north Sinian Habahe Group in the Mountains. The Kmqi group is a set of middle-deep metamorphic rocks. The Sm-Nd isochron age of the whole rock is 1400 ± 78Ma (Hu, et al., 1993). Among the two ages of zircon and K-feldspar, t_1 is mainly distributed in 1800 Ma , The maximum is 2483 Ma (He Guoqi et al., 1990); t 2 is mainly distributed between 330 ~ 400 Ma. According to the U-Pb test of zircon in the Bragg complex (Eastward extension of the Kymco Group, Inner Mongolia) by E.B. Bébeckova, an age value of 2800 Ma was obtained, which may include part of the Archean