Presenters-0100: Difference between revisions
From CSDMS
(Created page with "{{Presenters temp |CSDMS meeting event title=CSDMS 2015 annual Meeting - Models meet data, data meet models |CSDMS meeting event year=2015 |CSDMS meeting presentation type=Inv...") |
No edit summary |
||
| Line 29: | Line 29: | ||
{{Presenters presentation | {{Presenters presentation | ||
|CSDMS meeting abstract presentation=We investigate the feedbacks between surface processes and tectonics in an extensional setting by coupling a 2-D geodynamical model with a landscape evolution law. Focusing on the evolution of a single normal fault, we show that surface processes significantly enhance the amount of horizontal extension a fault can accommodate before being abandoned in favor of a new fault. In simulations with very slow erosion rates, a 15 km- thick brittle layer extends via a succession of crosscutting short-lived faults (heave < 5 km). By contrast, when erosion rates are comparable to the regional extension velocity deformation is accommodated on long-lived faults (heave >10 km). Using simple scaling arguments, we quantify the effect of surface mass removal on the force balance acting on a growing normal fault. This leads us to propose that the major range-bounding normal faults observed in many continental rifts owe their large offsets to erosional and depositional processes. | |CSDMS meeting abstract presentation=We investigate the feedbacks between surface processes and tectonics in an extensional setting by coupling a 2-D geodynamical model with a landscape evolution law. Focusing on the evolution of a single normal fault, we show that surface processes significantly enhance the amount of horizontal extension a fault can accommodate before being abandoned in favor of a new fault. In simulations with very slow erosion rates, a 15 km- thick brittle layer extends via a succession of crosscutting short-lived faults (heave < 5 km). By contrast, when erosion rates are comparable to the regional extension velocity deformation is accommodated on long-lived faults (heave >10 km). Using simple scaling arguments, we quantify the effect of surface mass removal on the force balance acting on a growing normal fault. This leads us to propose that the major range-bounding normal faults observed in many continental rifts owe their large offsets to erosional and depositional processes. | ||
|CSDMS meeting youtube code= | |CSDMS meeting youtube code=UmTt-P2dDPk | ||
|CSDMS meeting participants=0 | |CSDMS meeting participants=0 | ||
}} | }} | ||
| Line 40: | Line 40: | ||
{{Presenters additional material | {{Presenters additional material | ||
|Working group member=Terrestrial Working Group, Geodynamics Focus Research Group | |Working group member=Terrestrial Working Group, Geodynamics Focus Research Group | ||
|CSDMS meeting presentation=Jean-Arthur_Olive_CSDMS_2015_annual_meeting.pdf | |||
}} | }} | ||
Latest revision as of 10:45, 8 August 2018
CSDMS 2015 annual Meeting - Models meet data, data meet models
Modes of extensional faulting controlled by surface processes
Abstract
We investigate the feedbacks between surface processes and tectonics in an extensional setting by coupling a 2-D geodynamical model with a landscape evolution law. Focusing on the evolution of a single normal fault, we show that surface processes significantly enhance the amount of horizontal extension a fault can accommodate before being abandoned in favor of a new fault. In simulations with very slow erosion rates, a 15 km- thick brittle layer extends via a succession of crosscutting short-lived faults (heave < 5 km). By contrast, when erosion rates are comparable to the regional extension velocity deformation is accommodated on long-lived faults (heave >10 km). Using simple scaling arguments, we quantify the effect of surface mass removal on the force balance acting on a growing normal fault. This leads us to propose that the major range-bounding normal faults observed in many continental rifts owe their large offsets to erosional and depositional processes.
Please acknowledge the original contributors when you are using this material. If there are any copyright issues, please let us know (CSDMSweb@colorado.edu) and we will respond as soon as possible.
Of interest for:
