Probe into zoning on coal metamorphism of shitanjing mining area in ningxia 石炭井矿区煤变质因素探讨
2.
Relationship between late paleozoic geothermal field of coal metamorphism and conservation conditions of coalbed gas in china 我国晚古生代煤变质古地温场与煤层气赋存条件
3.
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。
4.
On thebasis of describing mineralogy characteristics such as combination electron minro - form ， crystallinity of clay minerals ， the relationship between coal series clay minerals in themesozoic era in ningxia area and coal metamorphism was analyzed 在概述粘土矿物组合、电子显微形态和结晶度等矿物学特征的基础上，探讨了宁夏地区中生代煤系粘土矿物与煤变质的关系。
