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鄂尔多斯盆地之陕北盐盆赋存有巨厚的奥陶纪石盐矿层。对其含盐系有机地球化学的研究 ,尤其是对生物标记化合物的研究表明 ,盐层中有丰富的氯仿沥青A、有机碳、饱和烃、芳烃等有机化合物的分布。通过对可溶有机质饱和烃详细研究得出结论 ,认为 :Pr/ph值低、藿 /甾值高、β -葫罗卜烷、γ蜡烷、孕甾烷、升孕甾烷等均有分布。这反映了盐岩层形成于高盐度和强还原以及富含菌藻类水生生物的沉积环境。运用有机地球化学对含盐系进行系统研究有着重要的意义。这一方面可以了解盐类沉积的古环境 ,另一方面可以深刻认识生物在盐类沉积中的作用 ,以探索找盐找钾的生物标记化合物指标。
Ordos Basin, the northern salt basin there is a huge thick Ordovician rock salt deposit. Studies on its salt-bearing organic geochemistry, especially on biomarker compounds, show that there are rich distributions of organic compounds such as chloroform bitumen, organic carbon, saturated hydrocarbons and aromatic hydrocarbons in the salt layer. Through the detailed study of soluble organic saturated hydrocarbons, it is concluded that there is a low Pr / ph value, high imbibition / sterol value, and distribution of β - carbopol, γ wax, pregnane, . This reflects the formation of salt rock formations in high salinity and strong reduction as well as the depositional environment enriched with bacterial and algal aquatic organisms. The use of organic geochemistry on the salt system research is of great significance. On the one hand, it can understand the paleoenvironment of salt sediment, on the other hand, it can profoundly understand the role of biology in salt sedimentation, and explore the index of biomarkers for salt seeking for potassium.