广西十万大山盆地含煤地层发育特征及聚煤研究  

Study on development features and coal accumulation of coal bearing strata in Shiwan Mountain Foreland Basin of Guangxi

作　　者：杨创[1] 匡经水[1] 郭超 杨力川 

机构地区：[1]中国煤炭地质总局航测遥感局,陕西西安710054 [2]广西壮族自治区煤炭地质局,广西柳州545000

出　　处：《煤炭科学技术》2015年第6期116-121,共6页Coal Science and Technology

基　　金：中国地质调查局南方缺煤省份大调查资助项目(资[2010]矿评01-23-03)

摘　　要：基于十万大山盆地含煤地层的沉积环境与聚煤规律存在着密切的关系,为得出该地区聚煤规律,结合实测野外地层剖面、钻孔岩心观察、地球物理测井和连井剖面分析等手段,运用当代沉积学和高分辨率层序地层分析的理论和方法,分析了上三叠统扶隆坳组岩石学特征、沉积环境、基准面旋回类型及聚煤规律。识别出了河流相、河流三角洲相和湖泊相3种沉积相类型。研究表明:研究区聚煤作用主要发育在河漫滩沼泽环境,短期基准面上升的非对称性旋回的晚期。盆地可容纳空间/供给量大,沉降速度快。煤层厚度0.2~1.0 m,连续性差,厚度不稳定。Based on a close relationship existed between sedimentary environment and coal accumulation law of coal bearing strata in Shewan Mountain Foreland Basin,in order to have coal accumulation law in the region,in combination with the site measurement on the field strata cross section,geophysical logging,well connected cross section analysis and other means,the modern sedimentology and the theory and method of the high resolution sequence strata analysis were applied to analyze the petrology features,sedimentary environment,base level cycle type and coal accumulation law. Three sedimentary facies types of the fluvial facies,river delta facies and lake facies were indentified. The study showed that the main development of the coal accumulation role was the marsh environment on the floodplain and the short-term base level rising of the asymmetry cycle later period. The basin could hold a high space and high supply quantity and would have a fast sedimentary speed. The seam thickness was 0. 2 ~ 1. 0 m with a poor continuity and unstable thickness.

关 键 词：十万大山盆地 含煤地层 聚煤作用 沉积相 

分 类 号：P618.11[天文地球—矿床学]