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Title: Postglacial left slip rate and past occurrence of M[ge]8 earthquakes on the western Haiyuan fault, Gansu, China

Abstract

High-resolution (HR) air photographs and a 1-m horizontal and 2-m vertical resolution digital elevation model derived from them by stereophotogrammetry provide new constraints on the behavior of the western stretch of the active Haiyuan fault, in Gansu province, China. The photographs cover three swaths along the fault, each about 2-km-long and at least 500-m-wide, near the village of Songshan, at 103.5 hthinsp;[degree]E. This high-resolution data set is used to map and measure cumulative horizontal offsets of alluvial terraces and risers that range between 115 and 135 m, and 70 and 90 m, at two sites. Dating these terraces with [sup 14]C yields minimum and maximum ages of 8400 and 7600, and 14,200 years B.P., respectively. This leads to a postglacial slip rate of 12[plus minus]4 hthinsp;mm/yr, with a most likely minimum value of 11.6[plus minus]1.1 hthinsp;mm/yr. The smallest stream offsets observed on the HR photographs range between 8 and 16 m and are interpreted as coseismic displacements of the last few earthquakes with M[ge]8 that ruptured the 220-km-long Tianzhu gap of the fault, west of the Yellow River. Earthquakes of that size within this gap, which has been quiescent for at least 800 years, would recur at intervals of 1050[plusmore » minus]450 years. [copyright] 1999 American Geophysical Union« less

Authors:
; ; ; ;  [1];  [2];  [3]; ;  [4]
  1. Institut de Physique du Globe de Paris, CNRS UMR 7578, Paris (France)
  2. Ecole Superieure des Geometres et Topographes, Le Mans (France)
  3. Lawrence Livermore National Laboratory, Livermore, California (United States)
  4. Seismological Institute of Lanzhou, China Seismological Bureau, Lanzhou, Gansu (China)
Publication Date:
OSTI Identifier:
6034881
Resource Type:
Journal Article
Journal Name:
Journal of Geophysical Research
Additional Journal Information:
Journal Volume: 104:B8; Journal ID: ISSN 0148-0227
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; AGE ESTIMATION; CHINA; EARTHQUAKES; GEOLOGIC FAULTS; SEISMOLOGY; SLIP VELOCITY; TECTONICS; ASIA; GEOLOGIC FRACTURES; GEOLOGIC STRUCTURES; SEISMIC EVENTS; VELOCITY; 580000* - Geosciences

Citation Formats

Lasserre, C, Gaudemer, Y, Tapponnier, P, King, G C.P., Metivier, F, Kasser, M, Kashgarian, M, Taiya, L, and Daoyang, Y. Postglacial left slip rate and past occurrence of M[ge]8 earthquakes on the western Haiyuan fault, Gansu, China. United States: N. p., 1999. Web. doi:10.1029/1998JB900082.
Lasserre, C, Gaudemer, Y, Tapponnier, P, King, G C.P., Metivier, F, Kasser, M, Kashgarian, M, Taiya, L, & Daoyang, Y. Postglacial left slip rate and past occurrence of M[ge]8 earthquakes on the western Haiyuan fault, Gansu, China. United States. https://doi.org/10.1029/1998JB900082
Lasserre, C, Gaudemer, Y, Tapponnier, P, King, G C.P., Metivier, F, Kasser, M, Kashgarian, M, Taiya, L, and Daoyang, Y. 1999. "Postglacial left slip rate and past occurrence of M[ge]8 earthquakes on the western Haiyuan fault, Gansu, China". United States. https://doi.org/10.1029/1998JB900082.
@article{osti_6034881,
title = {Postglacial left slip rate and past occurrence of M[ge]8 earthquakes on the western Haiyuan fault, Gansu, China},
author = {Lasserre, C and Gaudemer, Y and Tapponnier, P and King, G C.P. and Metivier, F and Kasser, M and Kashgarian, M and Taiya, L and Daoyang, Y},
abstractNote = {High-resolution (HR) air photographs and a 1-m horizontal and 2-m vertical resolution digital elevation model derived from them by stereophotogrammetry provide new constraints on the behavior of the western stretch of the active Haiyuan fault, in Gansu province, China. The photographs cover three swaths along the fault, each about 2-km-long and at least 500-m-wide, near the village of Songshan, at 103.5 hthinsp;[degree]E. This high-resolution data set is used to map and measure cumulative horizontal offsets of alluvial terraces and risers that range between 115 and 135 m, and 70 and 90 m, at two sites. Dating these terraces with [sup 14]C yields minimum and maximum ages of 8400 and 7600, and 14,200 years B.P., respectively. This leads to a postglacial slip rate of 12[plus minus]4 hthinsp;mm/yr, with a most likely minimum value of 11.6[plus minus]1.1 hthinsp;mm/yr. The smallest stream offsets observed on the HR photographs range between 8 and 16 m and are interpreted as coseismic displacements of the last few earthquakes with M[ge]8 that ruptured the 220-km-long Tianzhu gap of the fault, west of the Yellow River. Earthquakes of that size within this gap, which has been quiescent for at least 800 years, would recur at intervals of 1050[plus minus]450 years. [copyright] 1999 American Geophysical Union},
doi = {10.1029/1998JB900082},
url = {https://www.osti.gov/biblio/6034881}, journal = {Journal of Geophysical Research},
issn = {0148-0227},
number = ,
volume = 104:B8,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 1999},
month = {Sun Aug 01 00:00:00 EDT 1999}
}