六盘山盆地中新生代沉积地层

The Sedimentary Strata from Mesozoic to the Cenozoic in Liupanshan Basin

六盘山盆地中新生代沉积地层巨厚 ,纵向发育上三叠统、中侏罗统、下白垩统、第三系及第四系 ,除中侏罗统分布局限外 ,其它均分布广泛。本文通过大量的野外地质露头考察资料和室内综合研究 ,建立了六盘山盆地中新生界地层层序 ,归纳总结出盆地中新生界五个宏观划分对比标志层 ,指出盆地中新生界主要发育上三叠统和下白垩统两套烃源岩 ,生烃潜力巨大 ,并可形成相应的两套主要生储盖组合 。

The Mesozoic and Cenozoic strata of great thickness in Liupanshan basin can be identified as upper Triassic,middle Jurassic ,lower Cretaceous,Teriary and Quaternary vertically.All but middle Jurassic are widely distributed.In this paper,from the Mesozoic to the Cenozoic strata sequence is defined,and five correlation marker formations are summed up through sufficient data of field gelolgic outcrop survey and comprehensive analyses.It is pointed out that there are mainly two sets of source strata developed in the upper Triassic and lower Cretaceous,with great source potential,and two corresponding sets of source-resevoir-seal assemblage have formed, so as to lay a good foundation for geological comprehensive analyses and oil & gas exploration in Liupanshan basin.