School of Resources and Earth Science, China University of Mining Technology Key Lab of Coalbed Methane
Resources and Reservoir Formation Process Ministry of Education

基于巢湖地区龙潭组沉积环境与聚煤特征存在密切关系,为得出该地区聚煤规律,通过实测野外岩层剖面及室内粒度分析,运用沉积学、煤田地质学的基本理论和方法,分析了巢湖地区龙潭组的岩石学特征、沉积环境及其演化,识别出三角洲相、泻湖-潮坪相、碳酸盐台地相3种沉积相,其中三角洲相包括2种亚相、5种微相。研究表明:巢湖地区龙潭组含煤地层主要是由三角洲平原沼泽淤浅形成,三角洲平原是聚煤的最佳场所。巢湖地区龙潭组煤层与皖南其他地区相比,其特点是厚度薄、层位高、硫分高,这主要是与其沉积基底、沉积环境、形成时间的差异等有关。

In order to explore the relationship between the coal accumulation characteristics and the sedimantary environment of Longtan Formation, this paper an alyzed the petrological characteristics, sedimentary environments and the evolution of Longtan Formation in Chaohu Area. Combined with the basic theory and method of sedimentology and coal geology, three kinds of sedimentary facies: delta facies, lagoon- tidal flat facies and carbonate platform facies were distinguished by means 0 f the measurement of field profile and indoor grain size analysis. Among them, the delta facies included two types of subfacies and five types of microfacies. The rusults showed that the coal- bearing strata of Longtan Formation area were mainly formed by delta plain swamp flling in Chaohu Aera, and the delta plain was the best place f or coal accumulation. Compared with other regions in southern Anhui Province, it was featured as thin seam, high layer position and high sulfur content. This could attri bute to the difference of sedimentary basement, sedimentary environment and forming time in Chaohu Area.

中国煤炭地质总局广西煤炭地质局资源调查开发资助项目(2012060013)；