A review of deformation pattern templates in foreland basin systems and fold-and-thrust belts: implications for the state of stress in the frontal regions of thrust wedges

Autor: Olivier Lacombe, Josep Anton Muñoz, Stefano Mazzoli, Amerigo Corradetti, Stefano Tavani, Fabrizio Storti
Přispěvatelé: Dipartimento di Scienze della Terra, Università degli studi di Napoli Federico II, Natural and Experimental Tectonics Research Group, Dipartimento di Fisica e Scienze della Terra 'Macedonia Melloni', University of Parma = Università degli studi di Parma [Parme, Italie], Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Geomodels, Departament de Geodinàmica i Geofisica, Facultat de Geologia, Universitat de Barcelona, Tavani, Stefano, F., Storti, O., Lacombe, Corradetti, Amerigo, J. A., Mu?oz, Mazzoli, Stefano, University of Naples Federico II = Università degli studi di Napoli Federico II, Università degli studi di Parma = University of Parma (UNIPR)
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Earth-Science Reviews
Earth-Science Reviews, Elsevier, 2015, 141, pp.82-104. ⟨10.1016/j.earscirev.2014.11.013⟩
Earth-Science Reviews, 2015, 141, pp.82-104. ⟨10.1016/j.earscirev.2014.11.013⟩
ISSN: 0012-8252
Popis: Aesthetically appealing thrust systems and related large-scale anticlines, in both active and fossil foreland fold-and- thrust belts, and the economic potential associated with the m, have captured the interest of structural geologists for many decades. As a consequence, a large amount of data on sub -seismic deformation patterns from thrust-related an- ticlines is available in the literature. We provide a review of deformation pattern templates from fi eld data in foreland fold-and-thrust-belts and show that the most frequent tre nds of sub-seismic syn-orogenic deformation structures hosted in km-scale thrust-related folds frequently and pa radoxically indicate a syn-th rusting strike-slip stress fi eld con- fi guration, with a near-vertical σ 2 and a sub-horizontal σ 3 , rather than a contractional one where the latter is expected to be the vertical principal axis of the stress ellipsoid. This a pparent inconsistency between sub-seismic syn-orogenic deformation structures and stress fi eld orientation is here named “ the σ 2 paradox ” . Field data support a possible expla- nation of the paradox, provided by the major role played by i nherited early-orogenic extensional deformation struc- tures on thrust fault nucleation. Nucleation of major thru sts and their propagation is facilitated and driven by the positive inversion and linkage of the early-orogenic sub-s eismic extensional inheritance developed in the foreland basin. This process eventually leads to the development of l argereversefaultzonesandcanoccurbothincontractional and strike-slip stress fi eld con fi gurations
Databáze: OpenAIRE
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