孟家屯岩组为鲁西新太古代早期形成的一套表壳岩，代表性的岩石类型为石榴石英岩、黑云母石英片岩、斜长角闪岩等。
The Mengjiatun Formation complex is a suite of supracrustal rocks formed in the early Neoarchean, and its typical rocks include garnet quartzite, biotite-quartz schist and amphibolite.
本区岩浆岩非常发育，主要为中酸性岩浆岩，以江里沟斑状黑云母花岗岩和江里沟斑状花岗闪长岩为代表。
Magmatic rocks are developed, and are mainly intermediate and acid rocks, represented by Jianligou phyric biotite-granite and Jianligou phyric granodiorite.
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