汾渭与贝加尔裂谷系相似性的统计分析

在野外观测遥感综合解译的基础上，充分利用区内已积累的地质与地球物理资料，应用统计分析方法，从７个方面分别计算分析了汾渭与贝加尔裂谷系的相似性系数。显著性统计检验表明，两裂谷系在几何形态、三维构造格局、历史与现今活动性各方面都存在显著的相似性。

STATISTIC ANALYSIS OF SIMILARITIES BETWEEN FENWEI AND BAIKAL RIFT SYSTEMS

Similarity factors are calculated from both field observations and remote sensing image interpretations for analyzing tectonic similarities between the Fenwei and Balkal rift systems in 7 different aspects by means of statistic methods on the basis of abundant geologic and geophysic data. The similarity factor is 0.999 for their geometry, 0.923 for the sedimentation rate at various stages of rifting, 0.635 for the total subsidence in the Cenozoic, 0.794 for fault activities during rifting, 0.813 for seismic activities and 0.766 for the shape of the Moho(between Fenwei and Balkal rift systems). Further statistic check (student-t check)shows that there is remarkable similarity between the two in 3-demensional structure framework, and historical and present activities.
An analysis of the results obtained from GPS survey and stress measurements suggests that the high similarity between the Fenwei and Balkal rift systems may be dynamically related to the large scale S-shaped extension originating from the unequal westward motion of the two N-S oriented adjoining terrains in the east Asian continent.