Active fault segmentation and seismic hazard in Hoa-Binh reservoir, Vietnam

被引：11
|
作者：
Phan Trong Trinh [1 ]
Hoang Quang Vinh [1 ]
Nguyen Van Huong [1 ]
Ngo Van Liem [1 ]
机构：
[1] Vietnam Acad Sci & Technol, Inst Geol Sci, Hanoi, Vietnam
来源：
CENTRAL EUROPEAN JOURNAL OF GEOSCIENCES | 2013年 / 5卷 / 02期
关键词：
fault segment; normal fault; state of stress; maximum credible earthquake; peak ground acceleration; seismic moment; RED-RIVER; YUNNAN PROVINCE; CHINA; MAGNITUDE; BOUNDARY; REGION; SHEAR; ZONE;
D O I：
10.2478/s13533-012-0128-5
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Based on remote sensing, geological data, geomorphologic analysis, and field observations, we determine the fault system which is a potential source of earthquakes in Hoa-Binh reservoir. It is the sub-meridian fault system composed of fault segments located in the central part of the eastern and western flanks of the Quaternary Hoa-Binh Graben: the Hoa-Binh 1 fault is east-dipping (75-80A degrees), N-S trending, 4 km long, situated in the west of the Hoa-Binh Graben, and the Hoa-Binh 2 is a west-dipping (75-80A degrees), N-S trending; 8.4 km long fault, situated in the east of the Hoa-Binh Graben. The slip rate of normal fault in Hoa-Binh hydropower dam was estimated at 0.3-1.1 mm/yr. The Maximum Credible Earthquake (MCE) and Peak Ground Acceleration (PGA) in the Hoa-Binh hydropower dam have been assessed. The estimated MCE of HB.1 and HB.2 is 5.6 and 6.1 respectively, and the maximum PGA at Hoa-Binh dam is 0.30 g and 0.40 g, respectively. The assessment of seismic hazard in Hoa-Binh reservoir is a typical example of seismic hazards of a large dam constructed in an area of low seismicity and lack of law of seismic attenuation.
引用
收藏
页码：223 / 235
页数：13
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