北羌塘坳陷胜利河组膏岩沉积环境

Gypsolyte Sedimentary Environment of Upper Jurassic-Lower Cretaceous in Shenglihe Area in Northern Qiangtang Basin

2007年在西藏北羌塘胜利河地区上侏罗统索瓦组之上发现了一套厚达196m的含膏盐地层。通过分析膏盐顶、底板岩性以及膏盐的晶体形态、夹层、沉积组合特征认为,它具有海岸盐湖的沉积特征。该套含膏盐地层为北羌塘中生代盆地的油气成藏提供了良好的盖层。

In 2007, a set of gypsolyte strata with depth of 196 m was found above Suowa formation of Upper Jurassic in Shenglihe area in northern Qiangtang basin of Tibet. This study suggests from analyses of top-bottom lithology and gyproek crystal forms, interbed and sedimentary assemblage that such strata are characterized by coast salt lake deposit. Its discovery could provide good cap rock for hydrocarbon accumulation in the Mesozoic northern Qiangtang basin.