Concepts of metamorphism, metamorphic reaction, prograde and retro – metamorphisms.

变质的一般概念、变质反应、进变质和退变质。

It has a prismatic and splintery texture and is abundant in regionally metamorphosed (see metamorphism) rocks such as schists.

具有棱柱形和易碎裂的结构，在区域性变质（参阅metamorphism）中非常丰富，如片。

The khondalite lithology is composed of a suit of metamorphic aluminium-sedimentary rock.During the Jinning movement, the sedmentary rock experienced four stages of metamorphism.

明确黄陵地区孔兹为一变质的富铝质沉积组合，在晋宁期造期该经历四期变质作用。

Its original rock is sedimented in the environment of active epicontinent-seaboard with basic volcanism, and become khondalite series through the Archean regional high-amphibolite facies metamorphism.

原形成于具有基性火作用的活大陆边缘滨海-浅海环境。经过太古宙的区域高角闪相变质作用，形成孔兹。

Thus, the boron-bearing rock system and the magnesian rocks are the foundation of the borate deposits, whereas regional metamorphism and migmatitization and tectonism are the necessary conditions.

含硼、镁质容矿石是硼矿形成的物质基础，区域变质及混合化作用、构造活是硼矿形成的必要条件。

The calcite deposits are derived from the recrystallization of the carbonatite as a result of the weathering, eluviation of the fault, and the thermal contact activity and the metamorphism.

方解石矿有三个显著特征：即白色、块大、致密。

The former three stages reflect the major process of eclogite facies metamorphism and the latest stages the light overprinting of greenschist facies retrometamorphism at the shallow level of crust.

前三个阶段反映了榴辉相变质作用的主要过程。后一阶段，反映了榴辉在地壳浅部层次绿片相环境下遭受轻微的叠加改造。

Xiaertai rock group,a set of metamorphic rock system in Xiaertai area,has experienced strong ductilebrittle deformation and then thermal contact metamorphism and dynamometamorphism in the late stage.

经原恢复可将下二台群分为三个组：盘岭组，黄顶子组及烧锅屯组，其原建造分别为火建造、碳酸盐建造及碎屑建造。