河南石炭二叠纪含煤岩系煤热变质作用下的变化——地下水热液对煤变质作用影响的初步探讨

THE ALTERATION OF THE PERMO-CARBONIFEROUS COAL-BEARING SERIES IN HENAN RESULTING FROM THE COAL THERMAL METAMORPHISM——A PRELIMINARY APPROACHCH TO THE INFLUENCES OF THERMAL GROUNDWATER ON COAL METAMORPHISM

河南石炭二叠纪含煤岩系在热液活动影响下,煤及其围岩都发生了变化。作者研究了尉岩变化特征及热液的性质,认为热液是大气降水来源的地下水热液。并以地下水热液系统形成机制为核心,把水文地质学中的有关观点应用于煤变质问题研究,指出地下水热液是煤热变质作用过程中的对流传热媒介。此外,用围岩粘土矿物变化特征划分了围岩变化阶段,使之与煤变质阶段对应了起来。

Some changes have taken place in the coaI and its surrounding rocks of the Permo-Carboniferous coal-bearing series in Henan affected by hydrothermal activity. Having investigated the characteristics of the alteration of the surrounding rocks and the properies of the hydrothermal solutions, the authors considered that the hydrothermal solutions may be thermal groundwater derived from meteoric waters. With the formation mechanism of the thermal groundwater system as the focus and by applying the relevant view-points in hydrogeoiogy to the study of coal metamorphism, the authors point out that thermal groundwater acts as a heat transfer (convection) medium in the process of coal thermal metamorphism. Furthermore, the alteration characteristics of the clay minerals in the surrounding rocks are used to distinguish the alteration stages of the surrounding rocks, which are made to correspond with the stages of coal metamorphism.