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Accepted version

Publication date

2022-09-02

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cc-by-nc-nd (c) The Authors, 2022
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/216382

Influence of de acute accent collement-cover thickness variations in fold-and-thrust belts: Insights from centrifuge analog modeling

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https://doi.org/10.1016/j.jsg.2022.104704

Abstract

Centrifuge analog modeling incorporating thickness variations of décollement and overlying sedimentary cover is used to study thrust-wedge evolution on salt-detached contractional systems involving tapered sedimentary cover. From simpler, layer-cake to 3D tapered décollement-cover sequences, our models constrain wedge evolution: a more advanced front, where the cover is thicker, promotes differential frontal translation and triggers vertical axis rotation of several hinterland anticlines which appear towards the thinner cover area. In all cases, the décollement level is strongly sheared and tends to migrate laterally toward the thinner cover areas. Models are compared with previous analog models under normal gravity and the natural example of the South Pyrenean Central salient. All in all, we conclude that a 3D tapered décollement-cover basin architecture, as a sole factor, can determine the formation of a thrust salient formed by increasing structural curvature (progressive arc).

Subject

Tectònica salina, Geologia estructural, Falles (Geologia), Sedimentologia, Pirineus

Subject (English)

Sal tectonics, Structural geology, Faults (Geology), Sedimentology, Pyrenees

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Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

Citation

SANTOLARIA, Pablo, et al. Influence of de acute accent collement-cover thickness variations in fold-and-thrust belts: Insights from centrifuge analog modeling. Journal of Structural Geology. 2022. Vol. 163, num. 104704. ISSN 0191-8141. [consulted: 9 of June of 2026]. Available at: https://hdl.handle.net/2445/216382

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