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.

明确黄陵地区孔兹系为一套变质的富铝质沉合，在晋宁期造山运动期该套系经历四期变质。

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.

形成于具有基性火山的活动大陆边缘滨海-浅海环境。经过太古宙的区域高角闪相变质，形成孔兹系。

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.

含硼系、镁质容矿石是硼矿形成的物质基础，区域变质及混合化、构造活动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.

经恢复可将下二台群分为三个：盘岭，黄顶子及烧锅屯，其建造分别为火山建造、碳酸盐建造及碎屑建造。