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| Titel |
The strength of faults in a convergent margin, determined by neotectonic computer simulations |
| VerfasserIn |
Christoph Moder, Sara Carena |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250039497
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| Zusammenfassung |
| In order to better understand the fault strength in convergent tectonic settings, we investigated
the behavior of faults in the Taiwan region using a modified version of the neotectonic finite
element code SHELLS. We generated a finite element grid that contains topography, surface
heat flow, and a realistic 3D geometry of active faults. The lithosphere is assumed to be in
isostatic equilibrium and rigid plate velocities serve as driving forces. By varying the fault
properties (fault friction coefficient in the upper brittle crust, and dislocation creep activation
energy in the lower ductile crust), we were able to reproduce a realistic fault behavior in
terms of fault types, slip rates, overall velocity field, depth to the brittle-ductile
transition, and principal horizontal compressive stress directions. Our preliminary results
for the region around Taiwan indicate that the effective fault friction coefficient
(μ*- 0.1) is similar to the one we previously determined for the transpressional regime
of California, indicating that faults in both tectonic settings are similarly weak. |
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