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苏红图组火山岩主要出露于银根盆地中央隆起带的南北两侧，通过对野外露头的详细观察及室内的分析研究，认为该火山岩形成于早白垩世中晚期，岩石类型主要为呈熔岩被产出的火山熔岩，包括撖榄粗面玄武岩、橄榄玄武粗安岩、粗安岩等，其次为少量的火山碎屑岩和次火山岩相的辉绿岩，岩石学及岩石化学研究表明，该火山岩为一套钾玄岩系列岩石，这套火山岩的喷发对油气的生成与聚集构成有利条件，首先，火山喷发提供的热能促进了盆地内烃源岩的成熟及向烃类的转化；其次，气孔、溶孔、溶洞、裂缝发育的火山岩可以作为良好的集集层，较厚的玄武岩层的中央相带及层状侵入的辉绿岩可以作为较好的盖层．
The volcanic rocks of the Su-hongtu Formation are mainly exposed on both north and south sides of the central uplift belt of the Yingen basin. Through the detailed observation of the outcrop in the field and the laboratory analysis, it is believed that the volcanic rock was formed in the middle and late Early Cretaceous. The rock types are mainly lava The volcanic lavas produced include arkan rough basalts, olivine basaltic gabbros and gabbros, followed by a small amount of pyroclastic rocks of volcaniclastic and subvolcanic facies. Petrological and petrochemical studies indicate that the Volcanic rocks are a series of potash-basalt rocks. The eruption of this volcanic rock favors the formation and accumulation of oil and gas. First, the thermal energy provided by volcanic eruptions promotes the maturation of hydrocarbon source rocks in the basin and the conversion to hydrocarbons. Secondly, The volcanic rocks with porosity, dissolved pores, karst caves and fractures can be regarded as good cap rocks. The thicker basaltic facies belts and layered intruded diabase can be considered as cap rocks.