摘要
永荣煤田上三叠统须家河组可分七段,其中须一、须三、须五、须七段为含煤泥岩段,主要为滨岸—三角洲沉积,须二、须四、须六段为砂岩段,主要为河道沉积。在区内钻井剖面及露头剖面沉积相分析及岩相类型的归纳总结基础上,并结合剖面结构和区域资料的分析,将研究区须家河组划分为3种沉积体系7种沉积相类型,自下而上主要沉积了一套湖滨-三角洲—河流冲积平原的沉积体系,在三角洲间湾与滨岸沼泽煤层发育较厚。
The upper Triassic Xujiahe Formation in Yongrong coalfield can be divided into seven members, in which, the first, third, fifth, seventh are coal-bearing mudstone members, mainly littoral--deltaic sediments; while the second, fourth, sixth are sandstone mem- bers, mainly channel sediments. Based on borehole and outcrop section sedimentary facies analyses and lithofacies type summarization, combined with section structure and regional data analyses, divided Xujiahe Formation in the area into 3 sedimentary systems and 7 sed- imentary facies types, from bottom to top mainly deposited a set of lake shore--delta--fluvial plain sedimentary system, and rather thick coal seams have been developed in delta interdistributory bay and littoral bogs.
出处
《中国煤炭地质》
2013年第11期6-10,共5页
Coal Geology of China
关键词
永荣煤田
须家河组
沉积体系
Yongrong coalfield
Xujiahe Formation
sedimentary system
