摘要
Ⅰ. INTRODUCTION Based upon extensive X-ray diffraction analyses of the potassic white micas from metapelite, Sassi et al. found that the b0 value of muscovite increases with the increase of metamorphic pressure and indicated that such a value can be used as a geobarometer. The metamorphism was classified into 3 pressure types according to the b0 value of the muscovite in the rock studied, viz. the high. medium and low pressure types.
