BASIN EVOLUTIONARY DIFFERENCES AND SEISMOTECTONICS OF FENWEI GRABEN SYSTEM
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摘要: 基于盆地断陷规模、断陷幅度、构造样式的差异,将汾渭地堑系诸盆地划分为初始型、成长型、成熟型及连接型四类;认为盆地从初始型、成长型至成熟型,其构造闭琐度有减弱的趋势;剖析了各级强震震源区的构造特征,依据震源体理论,认为盆地类型与震级上限有对应关系。Abstract: Based on their size,total displacement and tectonic style,basins of the Fenwei graben system(northeast of China) can be divided into four types,the infant(or initial),the young(or growing),the mature and the joining ones,each succeeding stage being developed from the preceding one.
From the infant basin through the young or the mature,there was a decline in the structure barrier(or the resistance of the basin to further depression or expansion) resulting in a decrease of the upper limit of earthquake magnitude.-
Key words:
- basin type /
- tectonic style /
- seismic source area
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