What comes first: The fault or the ductile shear zone?
What comes first: The fault or the ductile shear zone?
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先发生什么:断层还是韧性剪切带?
DOI:
10.1016/j.epsl.2021.117273
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发表时间:
2022
影响因子:
5.3
通讯作者:
Choi, Eunseo
中科院分区:
文献类型:
--
作者:
Scholz, Christopher H.;Choi, Eunseo
Crustal scale fault zones extend below the brittle-ductile transition as ductile shear zones. Here we address the question of which regime, brittle or ductile, initiates and controls the overall system of shear localization. Observations of crustal scale but low displacement conjugate strike-slip faults show that they are typically nearly orthogonal, as expected from plastic shear criteria. Sub-crustal scale conjugate strike-slip faults, however, have acute dihedral angles in accordance with the Coulomb fracture criterion as Anderson's theory predicts. We modeled the crustal scale system with strain weakening rheologies that follow the Coulomb and von Mises criteria respectively, within the brittle and ductile regimes. We find that when the strain weakening rate in the ductile regime exceeds a critical value the entire system shears in the von Mises mode with orthogonal conjugate shears forming at all depths, in accordance with the observations. There is, as observed, no deflection of fault orientation at the brittle-ductile transition. Anderson's theory of faulting thus breaks down for crustal scale faults. This difference in behavior was already evident in data presented in Anderson's 1951 book, but its significance was not understood at that time.
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DOI:
10.5860/choice.28-1579
发表时间:
2016
期刊:
--
影响因子:
--
作者:
Leon Bieber
通讯作者:
Leon Bieber
影响因子:
2.9
作者:
E. Rutter
通讯作者:
E. Rutter
影响因子:
3.1
作者:
D. Peacock;D. Sanderson
通讯作者:
D. Sanderson
DOI:
10.4294/jpe1952.25.233
发表时间:
1977
期刊:
Journal of physics of the earth
影响因子:
--
作者:
M. Matsu'ura
通讯作者:
M. Matsu'ura
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
J. Moore;B. Parsons
通讯作者:
B. Parsons