鄂尔多斯盆地东北部上古生界煤系地层成煤特征分析  

Characteristic analysis of coal forming in the coal-bearing formation of Paleozoic in the northeast of Ordos basin

作　　者：朱春俊[1] 王延斌[1] 

机构地区：[1]中国矿业大学(北京)研究生院,北京100083

出　　处：《西安科技大学学报》2010年第6期687-692,730,共7页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(40272070)

摘　　要：依据基准面旋回的原理,应用露头、钻(测)井资料,研究了鄂尔多斯盆地东北部上古生界煤层的空间变化和平面分布规律。结果表明:受古地形和古气候的影响,在构造转换间歇期的不同沉积环境中,受基准面旋回和相分异作用控制,研究区煤层多形成于短期基准面上升的晚期,并以障壁海岸沉积的煤层分布广,厚度大;三角洲沉积体系中,煤层多发育在三角洲平原沼泽中;而辫状河道沉积体系中,受河道对下伏地层的冲刷迁移影响,煤层则出现分叉、变薄或尖灭,多不能形成规模煤层。Based on the base-level cycles principle,the outcrop and well drilling have been used to study the spatial variation and surface distribution rule of coal bed in the Paleozoic group coal bed in northeast of the Ordos basin.The result indicated that influenced by the ancient landform and the palaeo-climatology,under base-level cycles and facies differentiation,the coal bed forms in the rising later period of short-term base-level cycles in different deposit environment in the transformation dormant period,and coal bed distributes broadly with big thickness in the barrier island,and in the delta deposit system,the coal distributes in the plain mire of delta plain.While in the braided channel deposition system,influenced by the washout and migration of river course to lower beds,the coal bed appears to furcation,thining or pinch-out and cannot form the coal bed with large scale.

关 键 词：鄂尔多斯盆地 上古生界 成煤特征 聚煤控制因素 

分 类 号：TD163.1[矿业工程—矿山地质测量]