【摘要】 横穿中国东部郯庐古裂谷中段的连云港—临沂—泗水地壳测深剖面资料解释工作随着解释方法的不同其研究程度也不断深入(见图1)。1983年作者曾进行了一维垂向非均匀地壳速度模型的解释,并结合重磁场等地球物理资料的综合分析,探讨了临沂8.5级地震的深部构造背景。本文是在上述工作基础之上利用动力学射线追踪方法,选用二维非均匀地壳速度模型,进一步研究郯庐古裂谷中段的地壳结构特征,初步探讨古裂谷的形成及其动力学演化过程。更多还原

【Abstract】 The interpretations for the data of crustal depth measurement section of Lisnyun harbor-Linyi-Sishui which is across the mid-section of the fossil Tanlu rift valley in the east of China vary with interpretative methods (Fig. 1). The authors (1983) made an interpretation by one-dimensional vertical heterogeneous crustal velocity model and based on the comprehensive analysis of zeophysical data of gravity magnetic field etc. the authors studied the deep structural background of Linyi 8.5 earthguake. In this paper, baseed onthe above work, by dynamic ray tracing method, the crustal structrual characteristics of the mid-section of the fossil Tanlu rift valley have been further studied with two-dimensional heterogeous velocity model, and a preliminary study of fossil rift valleys formation and its dynamic evolution process has been made.更多还原