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位于北淮阳凹陷中部的马畈杂岩体，属于加里东期侵入体（角闪石４０Ａｒ／３９Ａｒ年龄为（４６２．７±１．４）Ｍａ）．化学成分显示该岩体具有钙碱性Ｉ型特点，形成于破坏性板块边缘的火山岛弧环境，定位深度约１０ｋｍ．根据岩体的应变分析、面理节理测量、包裹体测温，结合围岩宏观微观构造综合研究得出，马畈岩体至少经历了两次明显构造变形和３个阶段的抬升才剥露于地表．岩体主期隆升发生在侏罗纪之前，早于南部大别地块的主期隆升时间（Ｊ３—Ｋ１），岩体的多期构造变形与北淮阳自早古生代以来的构造演化有着密切关系．
The Mabu complex, located in the central part of the northern Huaiyang depression, belongs to the Caledonian intrusive body (amphibole 40 Ar / 39Ar age 462.7 ± 1.4 Ma). The chemical composition shows that the rock mass has the characteristics of Ca-Alkaline type I and is formed in the volcanic island arc environment at the edge of destructive plate, with a depth of about 10km. According to the analysis of rock strain, the measurement of facet joint and the temperature measurement of the inclusion body, combined with the macroscopic and microcosmic structural analysis of the surrounding rock, it is concluded that the Mazhang pluton experienced at least two distinct structural deformations and three stages of uplift were exposed Surface. The main uplift of the rock mass took place before the Jurassic, earlier than the main uplift time (J3-K1) of the Dabie massif in the southern part, the multistage tectonic deformation of the rock mass and the tectonic evolution of the Northern Huaiyang since the Early Paleozoic There is a close relationship.