Evidence of Nonlinear Elasticity of the Crust from the Mw7.6 Manyi (Tibet) Earthquake-Reference-Cited by-同舟云学术

Evidence of Nonlinear Elasticity of the Crust from the Mw7.6 Manyi (Tibet) Earthquake

Published:1999-10-08 Issue:5438 Volume:286 Page:272-276
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Peltzer Gilles¹,Crampé Frédéric²,King Geoffrey²

Affiliation:

1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

2. Institut de Physique du Globe de Paris, France.

Abstract

Satellite synthetic aperture radar (SAR) interferometry shows that the magnitude 7.6 Manyi earthquake of 8 November 1997 produced a 170-kilometer-long surface break with up to 7 meters of left-lateral slip, reactivating a N76°E quaternary fault in western Tibet. The radar interferometric map reveals asymmetric, along-strike displacement profiles between the two sides of the surface rupture, a pattern that cannot be explained with linear elastic theory. This observation suggests that the elastic moduli of the crust in tension and in compression are different because of the presence of cracks in the crust at shallow depth. A model indicates that a ratio of 2 between compressive and tensile elastic moduli can account for the observed asymmetry, a ratio that is consistent with laboratory and borehole measurements.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference56 articles.

1. Surface deformation due to shear and tensile faults in a half-space

2. See for example

3. Hudnut K. W. et al. 84 625 (1994);

4. ; J. Freymuller N. E. King P. Segall ibid. p. 646.

5. Many crustal rocks exhibit nonlinear elastic properties with a Young's modulus dependent on the confining pressure. Tests on laboratory samples showed that rocks such as sandstone marble limestone quartzite and granite have a Young's modulus in tension smaller than the Young's modulus in compression in a ratio ranging from 1/2 to 1/10 [J. C. Jaeger and N. G. Cook Fundamentals of Rocks Mechanics (Chapman & Hall London ed. 3 1979) chaps. 10 and 12;

Cited by 214 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. New Evidence of Late Quaternary Tectonic Activity Along the Eastern Margin of the Qaidam Basin;Tectonics;2024-01

2. Dynamic Rupture of the 2021 M_W 7.4 Maduo Earthquake: An Intra‐Block Event Controlled by Fault Geometry;Journal of Geophysical Research: Solid Earth;2024-01

3. Estimation of active surface deformation using PSInSAR technique of the Central Himalayan region;Geocarto International;2024-01

4. Soil moisture effects on InSAR - A correction approach and example from a hyper-arid region;Remote Sensing of Environment;2023-11

5. Study of the Interseismic Deformation and Locking Depth along the Xidatan–Dongdatan Segment of the East Kunlun Fault Zone, Northeast Qinghai–Tibet Plateau, Based on Sentinel-1 Interferometry;Remote Sensing;2023-09-23