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Do faults trigger folding in the lithosphere?

Gerbault, Muriel and Burov, Eugenii B. and Poliakov, Alexei N.B. and Daignières, Marc Do faults trigger folding in the lithosphere? (1999) Geophysical Research Letters, 26 (2). 271-274. ISSN 0094-8276

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Official URL: https://doi.org/10.1029/1998GL900293

Abstract

A number of observations reveal large periodic undulations within the oceanic and continental lithospheres. The question if these observations are the result of large- scale compressive instabilities, i.e. buckling, remains open. In this study, we support the buckling hypothesis by di- rect numerical modeling. We compare our results with the data on three most proeminent cases of the oceanic and continental folding-like deformation (Indian Ocean, Western Gobi (Central Asia) and Central Australia). We demon- strate that under reasonable tectonic stresses, folds can de- velop from brittle faults cutting through the brittle parts of a lithosphere. The predicted wavelengths and finite growth rates are in agreement with observations. We also show that within a continental lithosphere with thermal age greater than 400 My, either a bi-harmonic mode (two superimposed wavelengths, crustal and mantle one) or a coupled mode (mono-layer deformation) of inelastic folding can develop, depending on the strength and thickness of the lower crust.

Item Type:Article
HAL Id:hal-03157577
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Bureau de Recherches Géologiques et Minières - BRGM (FRANCE)
Other partners > Université de Montpellier (FRANCE)
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Deposited On:03 Mar 2021 10:51

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