摘要
通过石屏二矿勘查区含煤地层实测剖面及钻井岩心沉积学分析,认为龙潭组为陆相—海陆过渡相沉积,其中以海陆过渡相沉积为主,自下而上形成了风化残积体系、湖泊沉积体系、三角洲沉积体系及潟湖—潮坪沉积体系;C25煤层形成于泥炭沼泽相,C24煤层形成于滨湖相,C20、C19、C17、C14形成于三角洲平原相及分流间湾相,C11煤层形成于潟湖—潮坪相;勘查区最有利的聚煤环境为风化残积沉积和三角洲沉积体系,主要煤层除受沉积环境影响外,还受控于层间滑动断层及上覆砂岩冲刷作用的影响。
Based on coal-beating strata measured sections and drill core sedimentary analyses, considered that the Longtan Formation belongs to terrestrial to transitional paralie facies sediments, mainly the later. From bottom to top have formed weathering residual, lacus- trine, deltaic and lagoon--tidal fiat sedimentary systems. Coal seam C25 was formed in peat bog facies; C24 in lake shore; C20, C19, C 17 and C 14 in delta plain and interdistributory bay facies; C 11 in lagoon--tidal fiat facies. The most favorable coal accumulation envi- ronments are weathering residual and deltaic sedimentary systems. Besides sedimentary environment, main coal seam impacting factors still have interlayer gliding faults and overlying sandstone scouring.
出处
《中国煤炭地质》
2013年第10期7-11,25,共6页
Coal Geology of China
关键词
龙潭组
沉积特征
控煤地质因素
石屏二矿
Longtan Formation
sedimentary characteristics
coal controlling geologic factor
Shiping No.2 coalmine
