古地理学报Issue(5)：677-688,12.DOI:10.7605/gdlxb.2015.05.056
山西沁水盆地东南部上石炭统-下二叠统太原组聚煤环境
Coal-accumulating environments of the Upper Carboniferous-Lower Permian Taiyuan Formation in southeastern Qinshui Basin,Shanxi Province
摘要
Abstract
The Upper Carboniferous -Lower Permian Taiyuan Formation in Qinshui Basin contains important mineable coal seams and coalbed methane resources,and is well exposed in Fucheng town of Lingchuan County in southeastern Qinshui Basin,Shanxi Province.Based on the outcrop section observa_tion and a part of borehole data of the Taiyuan Formation,the paper synthetically analyzed the lithologicfeatures,sedimentary structures,body fossils,trace fossils,sedimentary sequence and some other depo_sitional characteristics.(1 ) Carbonate rocks of the Taiyuan Formation in this area were formed in two sed_imentary environments, i.e., open shallow sea (open platform) and restricted bay (restricted plat_form),among which,the top of Limestone 1 (L1 ),middle_lower part of L2 ,the upper part of L4 ,thetop of L5 ,the top of L7 and the L8 were formed in a restricted bay environment,and other limestone bedswere generated in an open shallow sea environment; (2) Based on the lithologic association characteris_tics of the Taiyuan Formation coal measures in the study area,six lithologic members were classified,andclastic rocks and coal seams in each member mainly were formed in sedimentary environments includingbarrier island (sand island),lagoon and tidal flat; (3) After analyzing sedimentary characteristics andsedimentary sequence,1 1 types of sedimentary sequences were distinguished and 3 types of coal_accumu_lating environment modes were proposed in the Taiyuan Formation coal measures of this area,includingcoal_accumulating environment of tidal flat associated with barrier island and lagoon depositional system,the coal_accumulating environment of tidal flat alongside restricted bay (lagoon),and the coal_accumula_ting environment of coastal tidal flat.The results may provide important information and theoretical supportsof sedimentary background for coal and coalbed methane exploration and developing in the Taiyuan Forma_tion of southeastern Qinshui Basin.关键词
沁水盆地/石炭系-二叠系/太原组/沉积环境/聚煤环境Key words
Qinshui Basin/Carboniferous -Permian/Taiyuan Formation/sedimentary environ_ment/coal_accumulating environment分类
天文与地球科学引用本文复制引用
王保玉,胡斌,白建平,杨连超..山西沁水盆地东南部上石炭统-下二叠统太原组聚煤环境[J].古地理学报,2015,(5):677-688,12.基金项目
国家重点科技专项（编号2011 ZX05063）和山西省煤层气联合基金项目（编号2013012012）共同资助 （）
