深层次构造岩中矿物多晶条带的塑性流动及对大陆岩石圈的构造意义

通过深层次构造岩中不同粒度矿物多晶条带塑性流动的比较和形成机理的探讨，得出矿物多晶条带的流度规律：在深层次构造岩中加工状态下生成的数种矿物多晶条带共生时，其晶粒较小着塑性流动的流度较大。结合单矿物多晶条带的粒度规律得出：在深层次构造岩中由动态重结晶所生成的数种单矿物多晶条带共生时，其中脆－韧性转化点温度较高的矿物，其多晶条带的塑性流动的流度较大。根据温压条件由低至高矿物的脆－韧性转化序列和岩石圈大陆部分各圈层的主要组成矿物，可知岩石圈大陆部分各圈层的塑性流动具有协调性。

PLASTIC FLOW OF MINERAL-POLYCRYSTAL STRIPS IN THE DEEPLEVEL TECTONITES AND ITS TECTONIC SIGNIFICANCE ONCONTINENTAL LITHOSPHERE

The fluidity law of mineral polycrystal strips is obtained by comparison of plastic flow of various size of grains in the deep level tectonite and by discussion of the formation mechanisms.When several kinds of mineral polycrystal strips formed under hot working state are paragenetic in deep level tectonite, the smaller the grain size in a mineral polycrystal stripis, the larger the fluidity of plastic flow of the strip.The above law and the grain size law of monomineralic polycrystal strips in deep level tectonite indicate that,when several kinds of monomineralic polycrystal strips formed by dynamic recrystallization are paragenetic, the higher the brittle ductile transformation temperature of a mineralis, the larger the fluidity of plastic flow of the mineral polycrystal strips.Based on the brittle ductile transformation sequence of the main rock forming minerals which is compatible with the low to high variation of pressure temperature conditions and on the main constitutive minerals of the different layers of lithospheric continent from the top to bottom,it is considered that the plastic flow of the different layers of lithospheric continent is characterized by internal coordination.