在晚元古代以前该地区至少发生过两次热动力变质作用。
Before Later Proterozoic era, in this area more than two times of thermodynamic metamorphism took place.
热动力变质岩带受构造应力集中带控制，是岩石强烈形变与相变的综合体。
All of the dynamothermal metamorphic belts are controlled by the structural stress concentrated zone and they are the complex of the strong deformation and facies change.
在本区煤系地层底部有一酸性侵人岩体，该侵入岩体是引起本区煤变质的直接热源，它提供了褐煤向烟煤转化的热动力。
In the bottom of coal measures is an acidic intrusive body, it is direct heat source of metamorphism, and provided the conversion of lignite to bituminous coal with thermodynamic power.
应用推荐