元宝山露天矿区元宝山组沉积环境及聚煤规律

Sedimentary Environment and Coal Accumulation of Yuanbaoshan Formation of Yuanbaoshan Strip Mine

通过收集大量钻孔资料,编制并分析了倾向沉积断面图、走向沉积断面图以及砂体等厚图。在此基础上,结合岩石成因标志和垂向层序,识别出元宝山组主要沉积相类型有:冲积扇相、湖泊相、扇三角洲相及河流相。然后,分析了其沉积环境演化,即经历了冲积扇—湖泊—扇三角洲—河流的演化过程。最后,阐述了元宝山组的聚煤规律。

Authors draw and analyze depositional trend and strike sections and sandstone isopach maps by collecting a lot of bores. Based on this, Four types of facies are identified that are alluvial fan facies, lacustrine facies, fan-deha facies and fluvial facies by studying petrous formation symbols and vertical sequences. Afterward evolvement of sedimentary environment is analyzed that is from alluvial fan to lacustrine to fan-delta to fluvial. In the end coal accumulation of Yuanbaoshan formation is expounded.