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

变质岩念、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.

具有棱柱和易碎裂结构，在区域性变质岩（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.

明确黄陵地区孔兹岩系为套变质富铝质沉积岩组合，在晋宁期造山运动期该套岩系经历四期变质作用。

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.

原岩于具有基性火山作用活动大陆边缘滨海-浅海环境。经过太古宙区域高角闪岩相变质作用，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、镁质容矿岩石是硼矿物质基础，区域变质及混合岩化作用、构造活动是硼矿必要条件。

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变质作用主要过程。后阶段，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。