沂沭断裂带构造地貌格局及其形成与演化

沂沭断裂带表现为东西分带、南北分段的棋盘格式构造地貌格局.这种构造地貌格局是由于受到北北东一南南西向挤压作用,断裂带两端受到近南一北向挤压作用而形成的;其形成及发展经历了四个主要阶段.

THE MORPHOTECTONIC PATTERN AND ITS FORMATION AND EVOLUTION OF THE YISHU FAULT ZONE

Tanlu fault'- mid-section-Yishu fault zone at present takes on two-way compounded tectonic landforms in chessboard style with long zones in the E-W direction and blocks in the S-N direction.The paper points out in the view of tectonic stress field,that the morphotectonic pattern of Yishu falut zone is formed under the action of NEE-SWW direction principal compressional stress which produced by the diving of the Pacific Ocean Plate toward Asia-Europe Plate and the action of S-N direction compressional stress which resulted from the expanding between North China-Pohai Sea and North Jiangsu-Huanghai Sea rift basins.The formation and development of the morphotectonic structure undergoes four stages: later period of the Oligocene-early stage of the Miocene,middle period of the Miocene,the Pliocene-initial stage of the Pleistocene and after the Mid-Pleistocene.