Abstract
The Taihang Mountain piedmont fault is a large-scale structure zone in north and east China which cross Beijing, with the NE-NNE extent spans approximately 620 km. It is very important to determine the fault zone activity due to the close relation of active structures and earthquakes. Regarding the fault activity, there are three different opinions: 1) it is a large deep fault zone; 2) it is an active fault zone and an earthquake structure belt; and 3) it is not an earthquake structure belt. In order to ascertain the active character of the fault, the deep tectonic setting and the activity since the Quaternary were investigated using recent seismic and drilling data to make a joint interpretation. The investigation results show that the Taihang Mountain piedmont fault is not a large lithospheric fault because the early middle Pleistocene (QP2) layers are offset by the fault and the late middle Pleistocene (QP2) and late Pleistocene layers are not offset by the fault. We determine that the Taihang Mountain piedmont fault in the area is not an active fault and is also not a large lithospheric fault. This study result provides important geological and geophysical data for city planning and construction in Hebei province and, especially, has great significance for seismic hazard assessment of the capital area.
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Xu Ming-Cai is a professor of the Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, Hebei, China. He obtained his Master’s degree at the China University of Geosciences (Beijing) in 1991. His major is research on techniques of the seismic method.
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Xu, MC., Gao, JH., Rong, LX. et al. Seismic analysis of the active character of the Taihang Mountain piedmont fault. Appl. Geophys. 7, 392–398 (2010). https://doi.org/10.1007/s11770-010-0265-x
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DOI: https://doi.org/10.1007/s11770-010-0265-x