内蒙古阿巴嘎旗北部的梅勒图组呈北东向展布,向北东延入蒙古,区域地质调查归于二连打布苏组一岩段(K2e1),经剖面测制、采样分析等综合研究,该地层应属于梅勒图组,岩性组合为安山玄武岩、玄武岩、玄武安山岩、辉石安山岩等。辉石安山岩全岩K-Ar年龄为122～136Ma,为早白垩世岩浆喷溢活动的产物。该火山岩形成于伸展构造环境,物质来源于上地幔。 The Meltu Formation in the northern part of the Abaga Banner of Inner Mongolia is distributed in the northeast direction and extends to the northeast to Mongolia. The regional geological survey is attributed to K2e1, a section of Erlizha Basu Formation, Comprehensive study, the strata should belong to the Meltu group, lithology combination of Anbas basalt, basalt, basaltic andesite, pyroxene andesite and so on. The K-Ar ages of the all-rock of the pyroxene andesite range from 122 to 136 Ma, which is the product of the Early Cretaceous magma spurting activity. The volcanic rocks formed in the extensional tectonic setting, the material comes from the upper mantle.