摘要
盐类沉积在埋深增加、地热温度逐渐增高的过程中,含结晶水的矿物将脱水熔融,矿物相发生转变。盐类沉积随着地热温度的变化而不断平衡的过程,称为地热变质作用。博歇特(H.Borchert)对地热变质作用做过较多的论述。但是,无论从物理化学分析的原理上,或是从组合热变质过程的认识上,都有进一步研究的必要。本文论述了盐类组合地热变质作用的相平衡规律,通过实验证实了这些规律。
Geothermal metamorphism discussed in this paper is one of the most important process of diagenesis of evaporites.Both theoretical and experimental study of physic-chemical process enables the writers to conclude that H.Borchert’s concept of"progressive geothermal metamorphism"is wrong.The melting of the hydrous minerals due to the increase of temperature was the only cause forming the metamorphic liquors,when evaporites were buried deeper and deeper under younger sediments.The melting point of paragenesis of salt mineral must be that of the invariant point in the polyther-mal diagram.Geothermal metamorphism proceeded in stages with the increasing temperature,and.mineral assemblage of each stage should be explained with the polyther-mal diagram.
作者
韩蔚田
蔡克勤
Han Wietian;Cai Keqing(Beijing Graduate Division,Wuhan College of Geology)
出处
《地质科学》
1981年第3期223-231,299,共10页
Chinese Journal of Geology(Scientia Geologica Sinica)
