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Constraining Shear Strength of Fault Damage Zone Using Geodetic Data and Numerical Simulation

التفاصيل البيبلوغرافية
العنوان: Constraining Shear Strength of Fault Damage Zone Using Geodetic Data and Numerical Simulation
المؤلفون: Chenglong Li, Zhangfeng Ma, Xi Xi, Guohong Zhang, Xinjian Shan
المصدر: Geophysical Research Letters, Vol 51, Iss 10, Pp n/a-n/a (2024)
بيانات النشر: Wiley, 2024.
سنة النشر: 2024
المجموعة: LCC:Geophysics. Cosmic physics
مصطلحات موضوعية: Geophysics. Cosmic physics, QC801-809
الوصف: Abstract Shear strength of damage zone, representing the stress threshold for rupture initiation, is a critical parameter in faulting mechanics. Despite its significance, the damage‐zone's shear strength has not been estimated in natural earthquake ruptures. Here we employed coseismic deformation and strain, kinematic slip model, and finite element modeling to determine the elastic properties and peak shear stress of coseismic damage zones along the 2021 Mw 7.4 Maduo earthquake. Through the analysis of the lowest shear stress resulting in surface ruptures and the highest stress without surface rupture, we constrained the strength within a range of 7–17 MPa. Our result is consistent with strength (5–16 MPa) of sandstone samples from laboratory tests, demonstrating the validity of this estimation. Although factors such as fault maturity and confining pressure influence strength variation, the strength can directly reflect the stress threshold required for macroscopic surface rupture formation in fault damage zones dominated by sandstone.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1944-8007
0094-8276
Relation: https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007
DOI: 10.1029/2024GL108169
URL الوصول: https://doaj.org/article/2fe0f1c46ad74f03b9676f2649ab20b6
رقم الأكسشن: edsdoj.2fe0f1c46ad74f03b9676f2649ab20b6
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:19448007
00948276
DOI:10.1029/2024GL108169