摘要
紫云地区作为贵州页岩气调查的工作区之一,其石炭系打屋坝组沉积相分析对古地理恢复及页岩气调查具有重要意义。通过野外调查、典型剖面分析与比较,结合微量元素(V、Sc、Cr)地球化学特征对紫云地区打屋坝组进行了详细的地层划分与对比,确定了其沉积相体系为深水陆棚-盆地相。打屋坝组在该时期空间上的沉积相分别为陆棚-盆地相、开阔台地相及局限台地相。发现该时期水体有变浅的趋势,从台盆沉积变化到氧化面上的深水陆棚沉积,其中打屋坝二段黑色页岩十分发育,有利于页岩气储集。
The Carboniferous sedimentary facies analysis in Ziyun district, as one of the Guizhou shale gas survey work area, has important significance for the paleogeography and shale gas survey. Through field investigation, the typical profile analysis and comparison, combined with trace elements （V,Sc, Cr） geochemical characteristics of the Ziyun district called Dawuba group a detailed stratigraphic division and correlation, the system of its sedimentary facies deep-water shelf-basin facies deposition. In the period of Dawuba on the space phase respectively shelf basin facies and open platform facies, from the change of sedimentary basin to the oxidation on the surface of the deep shelf deposition, which houses two dam black shales are well developed, is conducive to the shale gas reservoir.
出处
《河北地质大学学报》
2017年第2期1-9,共9页
Journal of Hebei Geo University
基金
国家自然科学基金面上项目(41672186)
中国地质调查局项目(1212010610609)
关键词
紫云
石炭系
打屋坝组
沉积相
Ziyun
Carboniferous
Dawuba formation
sedimentary facies
