Contrasting geomorphic and stratigraphic responses to normal fault development during single and multi-phase rifting

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Authors

Sofia Pechlivanidou , Anneleen Geurts, Guillaume Duclaux, Robert Gawthorpe, Christos Pennos, Emma Finch

Abstract

Understanding the impact of tectonics on surface processes and the resultant stratigraphic evolution in multi-phase rifts is challenging, as patterns of erosion and deposition related to older phases of extension are overprinted by the subsequent extensional phases. In this study, we use a one-way coupled numerical modelling approach between a tectonic and a surface processes model to investigate topographic evolution, erosion and basin stratigraphy during single and multi-phase rifting. We compare the results from the single and the multi-phase rift experiments for a 5 Myr period during which they experience equal amounts of extension, but with the multi-phase experiment experiencing fault topography inherited from a previous phase of extension. Our results demonstrate a very dynamic evolution of the drainage network that occurs in response to fault growth and linkage and, to depocentre overfilling and overspilling. However, we observe profound differences between topographic and depocenter development during single and multi-phase rifting with implications for sedimentary facies development. Our quantitative approach, enables us to better understand the impact of changing extension direction on the distribution of sediment source areas and the syn-rift stratigraphic development through time and space.

DOI

https://doi.org/10.31223/X5J03H

Subjects

Earth Sciences, Geomorphology, Physical Sciences and Mathematics, Tectonics and Structure

Keywords

Multi-phase rifting Surface processes modeling, syn-rift stratigraphy, drainage network reorganization, Multi-phase rifting, Surface processes modeling, syn-rift stratigraphy, drainage network reorganization

Dates

Published: 2021-07-27 17:57

Last Updated: 2021-07-27 21:57

License

CC BY Attribution 4.0 International

Additional Metadata

Conflict of interest statement:
None

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