The high - pressure metamorphic rocks underwent an isothermal decompressional retrograde process after the peak metamorphism 研究表明,高压变质峰期后经?了近等温降压退变质过程。
This is a model of telemagmatic metamorphism and a character of coal metamorphism early - middle jurassic in northwest of china 属于区域岩浆热变质作用的一种模式,也是西北地区早中侏罗世煤变质的特点之一。
Medium - rank bituminites are formed by pneumato - hydrothermal metamorphism on the basis of burial metamorphism , and it is partial 深大断裂带及其附近局部发育的中级烟煤是在深成变质基础上,叠加了高温气液热变质作用而形成。
This paper deals with high - and ultrahigh - pressure eclogite , its occurrence , classification , petrology and mineral features and metamorphism 摘要对区内高压超高压榴辉岩的分布、分类,岩石、矿物特征,变质作用特征进行了系统研究。
Ore formation was dominated by exhalation - sedimentation , subsequently subjected to metamorphism reformation , superposition of magmatic hydrothermalism and supergenesis 成矿以喷气沉积作用为主,其后经历了变质改造、岩浆热液叠加及表生氧化作用。