根据化石组合和地层的接触关系，认为发育于银根盆地中央隆起带两侧的苏红图组火山岩，形成于早白垩世中晚期，岩石化学成分富含ＳｉＯ２，Ｎａ２Ｏ＋Ｋ２Ｏ，钾钠比值（Ｋ２Ｏ／Ｎａ２Ｏ）近于１，ＭｇＯ，ＣａＯ，＜ＦｅＯ＞富集程度低，氧化程度高（Ｆｅ２Ｏ３／ＦｅＯ比值大），为一套钾玄岩系列而有别于一般的碱性玄武岩。岩石类型包括粗面玄武岩、玄武粗安岩、粗安岩等，岩石化学和岩石系列特征表明，其形成的构造环境为陆内造山带。 According to the contact relationship between fossil assemblages and strata, the Suhongtu volcanic rocks developed on both sides of the central uplift zone of the Yingen Basin were formed in the late Early Cretaceous. The chemical constituents of rocks are enriched in SiO2, Na2O + K2O and K2O / Na2O ) Is close to 1, MgO, CaO, have a low degree of enrichment and a high degree of oxidation (large Fe2O3 / FeO ratio), which is different from the common alkaline basalt in a series of potash basalt series. The rock types include rough basalts, basaltic gabbros, gabbros and so on. The petrochemical and rock series show that the tectonic environment formed is intracontinental orogenic belt.