五台群
- 网络wutai group
五台群-
电子探针独居石定年法及五台群的变质时代
Electron-Microprobe Dating of Monazite and Metamorphic Age of Wutai Group , Wutai Mountains
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矿区出露地层主要为上太古界五台群一套经历了多期变质变形作用的中级区域变质岩系，变质程度为角闪岩相。
The stratas exposed are mainly comprised of a suit of middle-grade regional metamorphic rocks of Wutai group , upper Archaean . The rocks had undergone multi-stages of metamorphism and deformation of amphibolite facies .
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五台山早前寒武纪变质岩中的白云母属二八面体的2M型多型变体，其中五台群中的白云母为富含绿鳞石分子的普通白云母，滹沱群为多硅白云母。
The muscovites from Precambrian metamorphic rocks in Wutai Shan belong to the 2M-polytype of dioctahedrom : those from Wutai group are common muscovites rich in celedonite and those from Hutuo group are phengite .