桌子山煤田含煤地层沉积特征与聚煤模式探讨  

Sedimentology characteristics and coal-forming models debating in the coal-containing strata of Zhuozishan coal field

作　　者：王毅[1,2] 朱炎铭[1,2] 姚能旺[1,2] 谢康珍 宋昱[1,2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008 [2]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221008

出　　处：《中国矿业》2014年第8期100-104,共5页China Mining Magazine

摘　　要：通过单井岩性、沉积构造、连井剖面分析等手段,对桌子山煤田聚煤期沉积环境类型、沉积演化过程及聚煤特征进行了分析。研究表明:桌子山煤田石炭-二叠系含煤地层主要由潮坪、三角洲、曲流河3种沉积相组成,可进一步识别出潮上坪、三角洲平原、河漫等8种沉积亚相及多种沉积微相;受海水进退影响,聚煤期本区经历了海相到陆相的沉积演化过程,可分为四个演化阶段;期间聚煤作用的强弱取决于沉积相带的时空配置,最有利的聚煤环境为太原组下段的潮上泥炭沼泽及山西组2段的岸后沼泽、三角洲平原。从沉积环境角度,建立和探讨了本区主要的聚煤模式:潮坪聚煤模式与曲流河、三角洲平原聚煤模式。Analysis of sedimentary environment and coal accumulating regularity of Zhuozishan Coalfield was conducted based on analysis of borehole cores ,tectonic-sedimentary and well sections .It indicates that the sedimentary environments consist of tidal flat ,delta ,meandering river .Supratidal zone , delta plain ,flood plain and other eight subfacies and lots of microfacies canbe identified .The sedimentary of this area turned form marine facies to fluvial facies in the coal forming period ,which can be divided into four stages .The intensity of coal forming was controled by the sedimentary facies distribution in this area in different period .The most advantaged coal forming sedimentary environment were supratidal swamps in the underpart of Taiyuan Formation and flood plain swamps in the underpart of Shanxi Formation .Two types of coal-forming models were founded ,including tidal flat model and flood-delta plain model .

关 键 词：沉积环境 聚煤作用 桌子山煤田 聚煤模式 

分 类 号：P618.11[天文地球—矿床学]