琼东南盆地崖城组沉积特征及成煤环境  

Depositional characteristics and coal forming environment of Yacheng Formation,Qiongdongnan basin

作　　者：李莹[1] 张功成 吕大炜[3] 王东东[4] 刘海燕[3] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东青岛266555 [2]中海石油(中国)有限公司研究中心,北京100027 [3]山东科技大学地质科学与工程学院,山东青岛266510 [4]中国矿业大学地球科学与测绘工程学院,北京100083

出　　处：《煤田地质与勘探》2011年第1期1-5,共5页Coal Geology & Exploration

基　　金：国家自然科学基金项目(40872100);国家重大基础研究发展计划(973计划)项目(2009CB219400)

摘　　要：基于琼东南盆地各凹陷含煤地层岩心、测井等资料,以及崖城组岩石学、煤岩学及煤质学资料,研究了该盆地主要含煤地层崖城组的沉积、聚煤特点及成煤环境。结果显示:崖城组主要由含砾粗砂岩、粗砂岩、中砂岩、泥岩、碳质泥岩和煤组成,属于断陷盆地晚期的沉积;琼东南盆地以浅海周缘扇三角洲和滨海带为主要成煤环境及聚煤模式,成煤环境基本上与我国南方古近纪近海型成煤环境类似。The depositional characteristics,coal-accumulation law and coal forming environment of Yacheng Formation in coal-bearing strata are studied based on the analysis of the core,logging,and data of petrology,anthracology and coal property.On the basis of the analysis,the coal accumulation model was came up.Yacheng Formation can be divided into three members,which are memberⅠ,member Ⅱ and member Ⅲ.Yacheng Formation is the later period sedimention of graben basin,which was composed of peddy sandstones,grit,medium-sandstone,mudstone,carbargilite,caustobiolith（coal）.Sandstones have some instable constituents,such as feldspar,detritus,mica and so on in which quartzose arkose,lithic arkosic wacke and so on are more common.Mudstone is rich in plant detritus and has higher organic content.Coal accumulation model of fan dalta near the shallow sea and shoreland was found in Qiongdongnan basin.And the coal forming environment is basically similar with the paralic one in Paleogenein period of South China.So many coal seams are of the main characteristics.Marine fossils and glauconite and other marine authigenic minerals can be found.The terrestrial higher plants（pteridophytes） and a few aquatic plants became the main coal forming plants.

关 键 词：崖城组 沉积特征 成煤环境 琼东南盆地 

分 类 号：P618.11[天文地球—矿床学]