metamorphism

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

变一般概念、变反应、进变和退变。

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

具有棱柱和易碎裂结构，在区域性变（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.

明确黄陵区孔兹系为一套变富铝沉积组合，在晋宁期造山运动期间该套系经历四期变作。

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.

成于具有基性火山作活动大陆边缘滨海-浅海环境。经过太古宙区域高角闪相变作，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、镁容矿石是硼矿成物基础，区域变及混合化作、构造活动是硼矿成必要条件。

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作主要过程。后一阶段，反映了榴辉在壳浅部层次绿片相环境下遭受轻微叠加改造。

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组：盘岭组，黄顶子组及烧锅屯组，其建造分别为火山建造、碳酸盐建造及碎屑建造。