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在内蒙古东部从大兴安岭到华北克拉通发现了９处镁铁质捕虏体，经研究它们属于一套完整的堆积杂岩，其中具有典型的地幔显交代标志矿物组合：金云母、角门石和磷灰石等，稀土、微量元素特征显示了不同组分堆积岩之间的同源关系．同位素年代学表明它们是早中生代（２３７～２２０ Ｍａ）幔源岩浆底侵作用的产物，是华北中生代早期幔隆背景下壳、慢相互作用和陆壳垂向增生的直接证据．
Nine mafic xenoliths were found in the eastern Inner Mongolia from the Greater Xing’an Mountains to the North China Craton, and they are characterized by a complete set of complex cumulates with typical mantle meta-dating mineral assemblages: phlogopite, The characteristics of rocks, rare earths and trace elements show the homology between different components of sedimentary rocks. Isotopic chronology indicates that they are the products of mantle-derived magmatic underplating in the early Mesozoic (237-220 Ma) and are the direct evidence of the slow interaction of the crust and the vertical continental crust under the background of the mantle background in the Mesozoic in North China.