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Garnet fracturing reveals ancient unstable slip events hosted in plate interface metasediments

Garnet fracturing reveals ancient unstable slip events hosted in plate interface metasediments

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1016/j.epsl.2024.118794. This is version 1 of this Preprint.

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Authors

Samuel Angiboust, P. Io Ioannidi , Iskander Muldashev

Abstract

A paradox exists between the great number of intermediate-depth earthquakes occurring along active subduction interfaces worldwide and the extreme scarcity of paleo-seismic events recorded in exhumed metasedimentary rocks from ancient subduction zones. Recrystallization, shearing as well as exhumation-related overprinting generally contribute to the nearly-complete erasing of markers of unstable slip events in metamorphic rocks. We herein focus on a sample from an ancient deep thrust from a Cretaceous High-Pressure paleo-accretionary complex in Chilean Patagonia. A representative, moderately foliated micaschist exhibits broken garnet crystals...  more

DOI

https://doi.org/10.31223/X5CQ36

Subjects

Physical Sciences and Mathematics

Keywords

numerical modelling, garnet, fracturing, metasediment, paleoseismicity

Dates

Published: 2023-09-02 14:46

Last Updated: 2023-09-02 21:46

License

CC-By Attribution-NonCommercial-NoDerivatives 4.0 International

Additional Metadata

Conflict of interest statement:
None

Data Availability (Reason not available):
Details necessary for reproducing the results are listed in the manuscript.