摘要
现有各种资料都说明，“汾渭地堑”实际上包含着分别从始新世和上新世开始发生的３个相互斜列，向西南收敛，向东北撒开的独立地堑。３个地堑分别是由３个背斜轴部的纵向张断裂发育而成的，３个背斜是祁吕贺山字型构造体系弧顶东侧的组分。据此，对该区地震、现今地裂缝、地热异常、地下水量和水质，以及某些地方性疾病的分布等，都给予了合理的地质解释。
Data from different sources now available indicate that the'Fenhe-weihe graben'is actually composed of three separate enechelon arranged grabens,converging toward SW.The threee grabens had developed from the longitudinal tensiule faults on the crest of three antclines since Eocene and Pliocene times respectively,which are members of the eastern frontal arc of the Qilianshan-LUliangshan-Helansh epsilon structural system.The distribution of earthquakes,occurrences of present-day surface cracks,geothermal anomalies, ground water resources as well as some endemic deseases are found all closely related to the three grabens and the associated horsts.
出处
《地质力学学报》
CSCD
1995年第2期40-49,共10页
Journal of Geomechanics
关键词
地堑
地震地质
环境地质
graben
seismogeology
environmental geology
