潮水盆地侏罗系层序地层与聚煤规律研究

STUDY ON SEQUENCE STRATIGRAPHY AND COAL ACCUMULATING REGULARITIES OF JURASSIC SYSTEM IN CHAOSHUI BASIN

摘要: 运用层序地层学和沉积体系分析相结合的方法,对潮水盆地侏罗系进行综合沉积学研究,识别出各级层序界面特征,将侏罗系划分为2个构造层序、3个一级层序、4个二级层序、8个三级层序;发现各级层序地层单元对富煤带的控制因素是古气候条件、构造运动和与之密切相关的沉积环境,但对不同级别的层序地层单元控制因素具有主次之分。沉积体系分析结果表明,潮水盆地侏罗系的富煤单元主要发育于冲积扇沉积体系和扇三角洲沉积体系。

Abstract: Based on results of sequence stratigraphy and depositional system analysis,Jurassic system in Chaoshui basin is devided into two tectonic sequences,three first-order sequences,four second-order sequences and eight third-order sequences.It is showed that paleoclimate condition,tectonic movement and sedimentary emvironment are the main control factors of coal-enrichment zone contribution,and the units of coal-enrichment are located in fan delta depositional system and alluvial fan depositional system.