2023 CSDMS meeting-025: Difference between revisions
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|CSDMS meeting abstract title=Comparing numerical simulations and field studies of strike-slip faults from the hyper-arid Atacama Desert to Tararua Mountains, New Zealand. | |||
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|CSDMS meeting abstract=Field-based observations and numerical models of lateral faults indicate that the preservation of the landscape response depends on fault slip rates, climatic conditions, and surface erosional activity. Desert environments, on one end of the climate spectrum, are sensitive to climate changes and tend to provide an excellent record of landscape modification. The Salar Grande Fault in the Atacama Desert, for example, is characterized by long periods of hyper aridity with the absence of fluvial activity, but still preserves dextral offset geomarkers evidencing past humid periods and faulting. On the other extreme, wet environments are intensively affected by constant fluvial erosion and mass wasting. In New Zealand, for example, complex systems of parallel right-lateral faults in the Tararua Mountains interact with each other making rivers run across and along the fault branches that slip at different rates. Inspired by the complexities of these contrasting strike-slip fault settings we create analog simulations to observe the role of climate variability, sediment, and the interaction between multiple structures affecting the topography. The model’s results are compared with field observations, focusing on channels, ridges, and other mountain range scale observations. | |||
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Revision as of 19:45, 10 February 2023
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Comparing numerical simulations and field studies of strike-slip faults from the hyper-arid Atacama Desert to Tararua Mountains, New Zealand.
Tamara Aranguiz,
(she/ella),University of Washington Seattle Washington, United States. tarangui@uw.edu
Alison Duvall, University of Washington Seattle Washington, United States. aduvall@uw.edu
Gregory Tucker, University of Colorado, Boulder Boulder , United States.
Field-based observations and numerical models of lateral faults indicate that the preservation of the landscape response depends on fault slip rates, climatic conditions, and surface erosional activity. Desert environments, on one end of the climate spectrum, are sensitive to climate changes and tend to provide an excellent record of landscape modification. The Salar Grande Fault in the Atacama Desert, for example, is characterized by long periods of hyper aridity with the absence of fluvial activity, but still preserves dextral offset geomarkers evidencing past humid periods and faulting. On the other extreme, wet environments are intensively affected by constant fluvial erosion and mass wasting. In New Zealand, for example, complex systems of parallel right-lateral faults in the Tararua Mountains interact with each other making rivers run across and along the fault branches that slip at different rates. Inspired by the complexities of these contrasting strike-slip fault settings we create analog simulations to observe the role of climate variability, sediment, and the interaction between multiple structures affecting the topography. The model’s results are compared with field observations, focusing on channels, ridges, and other mountain range scale observations.
