抚顺盆地富氢煤的特征及形成条件

CHARACTERISTICS AND FORMATION CONDITIONS OF HYDROGEN-RICH COAL IN FUSHUN BASIN

庄新国 李思田 王生维

ZHUANG Xinguo LI Sitian WANG Shenwei

中国地质大学 沉积盆地及沉积矿产研究所, 武汉 430074

China University of Geosciences, Wuhan 430074, China

本文以系统的野外和室内分析测试为基础,系统地描述了抚顺盆地第三纪富氢煤的岩石学、有机地球化学和加氢液化特征,并对富氢煤的形成条件进行了初步探讨。抚顺煤岩石类型非常丰富,根据煤的宏观岩石组成和结构已划分出19种岩性相类型。抚顺煤的显微组分总体以富镜质体和贫惰性体和壳质体为特征,但在一些特殊岩石类型分层中,例如:琥珀煤和腐殖-腐泥煤,前者具有丰富树脂体,后者主要由碎块状镜质体和高降解的丝状藻类体组成。抚顺煤的煤级主要为亚烟煤和高挥发分烟煤A.抚顺煤具有限的液化性能,是一种优质的液化煤。抚顺煤形成于温暖潮湿强覆水的富树脂的森林沼泽和比较快速沉降的构造环境。

On the base of systematic field works and analysis of test in laboratory,this study summarized characteristics of petrography,organic geochemistry and hydro-liquefaction of hydrogen-rich coal in Fushun Basin,and made an inquiry into formation conditions of hydrogen-rich coal.The lithofacies types of Fushun coal are very abundant.19 types of lithofacies have been identified in terms of macroscopic petrographic composition and structural type of Fushun coal.The maceral of Fushun coal is generally characterized by high vitrinite and low inertinite and exinite contents,but in some special lithotypes,for example,amber coal and humic-sapropelic coal,the former contains abundant resinite and the latter is mainly composed of fragmental vitrinite and high degraded filamentous algae.The rank of Fushun coal is mainly subbituminous and high volatile abituminous.Fushun coal is of good liquefaction quality and relatively-excellent liquefaction coal.Fushun coal was formed in a warm and humid forest swamp with deep overlying water and rich resin,and a tectonic condition of rapid subsidence.

https://doi.org/10.11781/sysydz199902151