metamorphism

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

岩一般概念、反应、进和退。

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，在性岩（参阅metamorphism）中非常丰富，如片岩。

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.

明确黄陵地孔兹岩系为一套富铝沉积岩组合，在晋宁期造山运动期间该套岩系经历四期用。

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.

原岩成于具有基性火山用活动大陆边缘滨海-浅海环境。经过太古宙高角闪岩相用，成孔兹岩系。

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.

含硼岩系、镁容矿岩石是硼矿成物基础，及混合岩化用、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岩相用主要过程。后一阶段，反映了榴辉岩在地壳浅部层次绿片岩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.

经原岩恢复可将下二台岩群分为三个岩组：盘岭岩组，黄顶子岩组及烧锅屯岩组，其原岩建造分别为火山岩建造、碳酸盐岩建造及碎屑岩建造。