摘要
通过对区内岩性、沉积构造、古生物、地球化学特征以及对区内沉积相、沉积旋回、沉积模式等沉积环境的初步分析,认为研究区含煤建造形成于潮坪～泻湖沉积体系,由湖泊相、泻湖相、潮坪相、泥炭沼泽相组成。区内稳定可采的主要煤层形成于岛后潮坪～泻湖演变成的泥炭沼泽,厚度大,延伸广。影响区内各煤层厚度和煤质变化的沉积因素主要有地形、蓄水盆地水位、海相顶板等。
Study of lithologic character,sedimentary structure,paleontology and geochemistry as well as sedimentary facies,sedimentary circulation and sedimentary model indicates that the coal-bearing formation in the Songba ore block,Junlian coal mine was formed in tidal flat-lagoon depositional system and consists of lacustrine facies,lagoon facies,tidal flat facies and peat moor facies.Major mineable seams were formed in back barrier peat moor facies.Change in thickness and quality of coal beds is controlled by topography,water level and marine roof.
出处
《四川地质学报》
2011年第2期149-152,共4页
Acta Geologica Sichuan
关键词
煤矿
沉积环境
聚煤规律
筠连
coal mine
sedimentary environment
coal-accumulating pattern
Junlian
