內蒙某区超基性岩体在大地构造位置上居蒙古大兴安岭褶皺系的中央,适为北东东到近东西向褶皺带与北北东向褶皺带的轉折部分。超基性杂岩体的侵入,分別受近东西和北北东两組深断裂的影响。由于同时受两組构造影响的結果,所以超基性岩岩体比較集中,規模比較大,形状也比較复杂。常呈“S”形、“E”形及其他不規則形。本文所要介紹的只是一个“S”形岩体的中間块段。 The ultramafic rocks in a certain area of ​​Inner Mongolia are located in the center of the Daxinganling fold system at the tectonic position of the earth, which is suitable for the transition from the NE to the EWF and the NEWF. The infiltration of ultrabasic complex rock mass is affected by the deep faults in the two groups near the east, west, and north-east respectively. As a result of the two sets of structural effects at the same time, ultramafic rocks are relatively concentrated, relatively large in scale and complex in shape. Often “S” shape, “E” shape and other irregular shape. This article is to introduce only a “S” -shaped rock mass intermediate block.