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旅大地区位于中朝板块东部南缘,处在中国南北两大板块相互作用的影响范围内。该区早期变形结果表现为近南北向挤压应力作用下形成的、由两个上盘向北正滑的强变形带分割的3个褶皱构造岩片。在三维空间内变形特点均有差异:从上到下、从南往北、从西往东应变量递减。这种变形特点表明在板块俯冲体制下,上盘板内的变形是不均匀的。该期变形可能与扬子板块向北深俯冲碰撞过程相联系。
The Luda area is located in the southern margin of the eastern part of China-Korea Plateau and is within the influence of the interaction between the two major plates in North and South of China. The results of early deformation in this area show three fold-structured slices separated by strong deformation zone with two normal slippery and north-easterly strata formed by compressional stress near north-south direction. Deformation characteristics in three-dimensional space are different: from top to bottom, from south to north, decreasing from west to east. This deformation feature shows that under the plate subduction system, the deformation in the upper plate is not uniform. This period of deformation may be associated with the deep northward subduction collision of the Yangtze plate.