Multidisciplinary inferences on a newly recognized active east‐dipping extensional system in Central Italy

Terra Nova - Tập 29 Số 1 - Trang 77-89 - 2017
Giusy Lavecchia1, Guido Maria Adinolfi2, Rita de Nardis1,3, Federica Ferrarini1, Daniele Cirillo1, Francesco Brozzetti1, Raffaella De Matteis4, Gaetano Festa2, Aldo Zollo2
1CRUST DiSPUTer Università “G. d'Annunzio” Chieti Scalo 66013 Italy
2Dipartimento di Fisica “Ettore Pancini”, Università di Napoli Federico II, Naples, Italy
3Dipartimento della Protezione Civile, Rome, Italy
4Dipartimento di Scienze e Tecnologie, Università degli Studi del Sannio, Benevento, Italy

Tóm tắt

AbstractWe use a multidisciplinary approach to gather preliminary evidence for a Quaternary east‐dipping extensional detachment in Central Italy. This structure crops out in the Sabini‐Eastern Simbruini (SES) and would be hidden at mid‐crustal depths beneath the L'Aquila 2009 (Mw6.3) epicentral area. TheSESgeometry is reconstructed through geological mapping, structural analysis and seismic line interpretation. The geometry of the mid‐crustal segment, referred to as the Ocre Segment (OS), is interpreted through seismological analyses of the largest aftershock (Mw5.4) of the L'Aquila 2009 sequence. The kinematic compatibility between theSESand theOSunder a commonSW–NEtensional field is tested through stress inversion of both geological and seismological data. The reliability ofOSactivation is tested through slip tendency analysis. Like other Italian cases, theSESand theOSare preliminarily interpreted as expressions at different depths of the same unknown east‐dipping extensional detachment, characterized by a ramp–flat–ramp geometry.

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Terra Nova

Tập 29 Số 1

77-89

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