Repository: Freie Universität Berlin, Math Department

Development of 3-D Rift Heterogeneity Through Fault Network Evolution

Naliboff, J.B. and Glerum, A. and Brune, S.A. and Péron-Pinvidic, G. and Wrona, T. (2020) Development of 3-D Rift Heterogeneity Through Fault Network Evolution. Geophysical Research Letters, 47 (13). ISSN 0094-8276; ESSN: 1944-8007

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Abstract Observations of rift and rifted margin architecture suggest that significant spatial and temporal structural heterogeneity develops during the multiphase evolution of continental rifting. Inheritance is often invoked to explain this heterogeneity, such as preexisting anisotropies in rock composition, rheology, and deformation. Here, we use high-resolution 3-D thermal-mechanical numerical models of continental extension to demonstrate that rift-parallel heterogeneity may develop solely through fault network evolution during the transition from distributed to localized deformation. In our models, the initial phase of distributed normal faulting is seeded through randomized initial strength perturbations in an otherwise laterally homogeneous lithosphere extending at a constant rate. Continued extension localizes deformation onto lithosphere-scale faults, which are laterally offset by tens of km and discontinuous along-strike. These results demonstrate that rift- and margin-parallel heterogeneity of large-scale fault patterns may in-part be a natural byproduct of fault network coalescence.

Item Type:Article
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
Divisions:Department of Mathematics and Computer Science > Institute of Mathematics
ID Code:2723
Deposited By: Monika Drueck
Deposited On:15 Feb 2022 15:37
Last Modified:15 Feb 2022 15:37

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