SEISMOLOGY AND GEOLOGY ›› 1979, Vol. 1 ›› Issue (4): 11-25.

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PRELIMINARY STUDY OF LATE CENOZOIC TECTONIC STRESS FIELD IN JIANGSU-SHANDONG-ANHUI REGION

Fang Zhongjing1, Xiang Hongfa1, Ding Menglin1, Ji Fengju1, Tang Youbiao2   

  1. 1. Institute of Geology, State Seismological Bureau;
    2. Anhui Seismological Bureau
  • Received:1978-10-31 Online:1979-12-05 Published:2009-11-25

苏鲁皖地区晚新生代构造应力场的初步探讨

方仲景1, 向宏发1, 丁梦林1, 计凤桔1, 汤有标2   

  1. 1. 国家地震局地质所;
    2. 安徽省地震局

Abstract: Based upon the studies of Late Cenozoic faulting and its related features in connection with the data of seismological observations involving a part of focal mechanism, topographic changes and geophysical explorations of the deep portion of the earth, the principal characteristics of the Late Cenozoic tectonic stress field in the region studied are discussed in this paper. It is suggested that the Himalayan movement together with the underthrusting of the Pacific plate reformed the regional stress field -of North China from Late Mesozoic to Early Cenozoic. As a result, the horizontal NEE-SWW trending compression is predominant. The change of the principal compressional stress from NEE to SEE in direction indicates both the consistancy between the stress fields of the region under investigation and North China area and also the difference in their individual features. Presumably the collision of the dominating Indian plate with the Eurasian plate and the underthrusting against one another by compression of the Pacific plate, together with a NW running underthrusting of the Philippines Sea plate and the lateral spreading of the surface crust caused by the upwarping of the upper mantle were responsible for this complex situation.

摘要: 据考察区的晚新生代断裂活动性质和结合地震断层、地震应变带、震源机制、地形变、地壳测深等资料的综合分析,认为本区与华北北部的晚新生代应力场既有一致性,又有本身特点。推论是近邻诸板块相向挤压作用和伴随的深部物质运动而导致地壳上部侧向运动等不同级次作用力复杂叠加的结果。指出它与中生代区域应力场不同。