江西省龙潭期岩相古地理研究  

Lithofacies palaeogeography study of Longtan period in Jiangxi Province Abstract

作　　者：徐良才 黄立衡 

机构地区：[1]江西省煤田地质勘察研究院,江西南昌330001

出　　处：《江西煤炭科技》2017年第4期9-13,共5页Jiangxi Coal Science & Technology

摘　　要：研究龙潭期古地理面貌对指导江西省找煤找气工作具有十分重要的意义。采用单因素分析综合作图法,选取地层厚度、含砂率、三角岩比图等参数,将龙潭早、中、晚期划分为内陆冲积平原相、海岸相、滨海冲积平原相、滨外盆地相、残积平原相、浅海碳酸盐台地相。研究发现龙潭期各期岩相古地理在垂向上具有继承性,即垂向上各期岩相古地理类型基本一致;平面上具有迁移性,即平面上相带随海水进退,由西北朝东南或由东南朝西北方向有序移动。It is of great significance to study the paleogeography features of Longtan period in order to guide the coal and gas prospecting in Jiangxi province.By single factor analysis and comprehensive mapping method and selection of stratum thickness,sand ratio,triangular rock ratio and other parameters,the early,middle and late Longtan were divided into inland alluvial plain facies and coastal facies,coastal alluvial plain,offshore basin facies,eluvial plain facies,neritic carbonate platform facies.The research achievement shows that the Longtan stage lithofacies palaeogeography in the vertical direction is inherited,namely vertical the paleogeographic types is basically identical;the plane with mobility,namely the plane facies with marine transgression,from northwest towards the southeast or from the southeast towards the northwest and orderly movement.

关 键 词：江西省 龙潭组 岩相古地理 

分 类 号：P531[天文地球—古生物学与地层学]