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１∶５万区调中，于大黑山条垒北段机房沟地区发现四楞山碱长花岗岩北东、南西两侧的早古生代中酸性火山岩及碎屑岩中广泛发育了向外倾斜的中—深层次的顺层韧性变形带、剥离断层及二叠纪哲斯组构成的沉积盖层。总体反映为北东—南西拉伸作用形成的机房沟变质核杂岩构造。
In the area of 1: 50000, the discovery of the Early Paleozoic mid-acidic volcanic rocks and clastic rocks in the north-east and south-west of the Si Lever alkali-hosted granite in the northern part of Daheishan Barrier Block found that the Deep deep bedding ductile deformation zones, detachment faults and sedimentary cover of the Permian Sheeth Formation. The overall reflection is the structure of the Zhanjianggou metamorphic core complex formed by the North-East-South Western expansion.