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Título

Shale-related minibasins atop a massive olistostrome in an active accretionary wedge setting: Two-dimensional numerical modeling applied to the Iranian Makran

AutorRuh, Jonas Bruno ; Vergés, Jaume ; Burg, Jean-Pierre
Palabras claveThrust characteristics
Dominated detachment
Salt
Evolution
Scale
deformation
Tectonics
Basins
Zone
Overpressure
Fecha de publicación2018
EditorGeological Society of America
CitaciónGeology, 46(9): 791-794 (2018)
ResumenMinibasins are sagging synformal depocenters surrounded by upsurging ductile material. They are traditionally related to salt tectonics. The onshore Iranian Makran accretionary wedge exhibits closed minibasins developed onto a regional-scale olistostrome with a shaly matrix. Two-dimensional numerical experiments were carried out to investigate whether the growth of such minibasins above a shale-dominated unit is feasible and how the presence of a regional, shale-dominated olistostrome may affect the structural evolution of active accretionary wedges. Model results indicate that rapid mass-flow emplacement triggers thickening of the rear of the wedge while minibasins grow in a more frontal, tectonically quiet region. Further wedge growth leads to a jump forward of frontal accretion. Compared to the case history, this jump would explain the structural characteristics of the Coastal Makran in Iran.
Versión del editorhttp://dx.doi.org/10.1130/G40316.1
URIhttp://hdl.handle.net/10261/169721
DOI10.1130/G40316.1
ISSN0091-7613
E-ISSN1943-2682
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