Concepts of metamorphism, metamorphic reaction, prograde and retro – metamorphisms.
变一般概念、变
反应、进变
和退变
。
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.
具有棱柱形和易碎裂结
,在区域性变
(参阅metamorphism)中非常丰富,如片
。
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
石是硼矿形成
物
基础,区域变
及混合
化作用、
造活动是硼矿形成
必要条件。
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
建造分别为火山
建造、碳酸盐
建造及碎屑
建造。
No.39 coal is one of high-metamorphism anthracite with black color and near-metallic luster in which semibright coal and semidull coal are dominant lithetype and there is a little dull coal.
大田水井坑井田39号煤层属高变无烟煤,灰黑色至黑色为主,似金属光泽,宏观煤
类型以半亮型和半暗型为主,少量为暗淡型;
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
作用
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
叠加改造。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件观点;若发现问题,欢迎向我们指正。