北大河 meaning in English

beida he
beidahe

At first , by investigating surrounding rock with beidahe group in this paper , beidahe group can . be proved autochthonic not allochthon
论文首先通过北大河岩群南北界与围岩的关系研究，证明北大河岩群是本地的，不是外来体。
Beidahe group is a suit of metamorphic rock by multiple phases of metamorphion - deformation in the west part of north qilian mountains , it is basement terrain in the west of qilian orogenic belt
北大河岩群是出露在西祁连的一套经过多期次变质变形改造的变质岩系，是西祁连造山带的基底地质体。
In the last , there is the beidahe group tectonic evolution pocess in this paper . the evolution pocess can be divided three stages . they are : 1 ) outspead stage ; 2 ) stabilization stage ; 3 ) collision extrusion stage . afterward beidaheyan group passed through multiple phases of metamorphic - deformational function , now we see beidahe group
最后论文简单的阐述了一下北大河岩群的构造演化过程： 1 )洋壳向下俯冲，岛弧伸展阶段； 2 )构造活动减弱，岛弧伸展趋于稳定阶段； 3 )碰撞挤压阶段。