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- W2279233239 abstract "Research Article| November 01, 2015 Fluid pressure cycles, variations in permeability, and weakening mechanisms along low-angle normal faults: The Tellaro detachment, Italy Luca Clemenzi; Luca Clemenzi † 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy †E-mail address: luca.clemenzi@unipr.it Search for other works by this author on: GSW Google Scholar Fabrizio Storti; Fabrizio Storti 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy Search for other works by this author on: GSW Google Scholar Fabrizio Balsamo; Fabrizio Balsamo 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy Search for other works by this author on: GSW Google Scholar Giancarlo Molli; Giancarlo Molli 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy2Department of Earth Sciences, University of Pisa, Via S. Maria, 53, I-56126 Pisa, Italy Search for other works by this author on: GSW Google Scholar Rob Ellam; Rob Ellam 3Scottish Universities Environmental Research Centre (SUERC), Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland, UK Search for other works by this author on: GSW Google Scholar Philippe Muchez; Philippe Muchez 4Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, B-3001 Heverlee, Belgium Search for other works by this author on: GSW Google Scholar Rudy Swennen Rudy Swennen 4Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, B-3001 Heverlee, Belgium Search for other works by this author on: GSW Google Scholar Author and Article Information Luca Clemenzi † 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy Fabrizio Storti 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy Fabrizio Balsamo 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy Giancarlo Molli 1Natural and Experimental Tectonics Research Group (NEXT), Department of Physic and Earth Sciences “Macedonio Melloni,” University of Parma, I-43124 Parma, Italy2Department of Earth Sciences, University of Pisa, Via S. Maria, 53, I-56126 Pisa, Italy Rob Ellam 3Scottish Universities Environmental Research Centre (SUERC), Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland, UK Philippe Muchez 4Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, B-3001 Heverlee, Belgium Rudy Swennen 4Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, B-3001 Heverlee, Belgium †E-mail address: luca.clemenzi@unipr.it Publisher: Geological Society of America Received: 08 Sep 2014 Revision Received: 18 Feb 2015 Accepted: 06 Apr 2015 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2015 Geological Society of America GSA Bulletin (2015) 127 (11-12): 1689–1710. https://doi.org/10.1130/B31203.1 Article history Received: 08 Sep 2014 Revision Received: 18 Feb 2015 Accepted: 06 Apr 2015 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Luca Clemenzi, Fabrizio Storti, Fabrizio Balsamo, Giancarlo Molli, Rob Ellam, Philippe Muchez, Rudy Swennen; Fluid pressure cycles, variations in permeability, and weakening mechanisms along low-angle normal faults: The Tellaro detachment, Italy. GSA Bulletin 2015;; 127 (11-12): 1689–1710. doi: https://doi.org/10.1130/B31203.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Classical frictional fault reactivation models indicate that slip along misoriented fault planes is not possible under most conditions. Nevertheless, active or exhumed low-angle normal faults have been described in many settings worldwide. This discrepancy is addressed by contrasting models: (1) those proposing that low-angle normal faults result from postkinematic passive rotation of former high-angle extensional faults; and (2) those proposing that specific conditions can promote slip along misoriented fault planes. This paper describes the Tellaro detachment, a mid–late Miocene low-angle normal fault that was responsible for ∼500 m of tectonic vertical thinning in the carbonate-dominated Triassic to Lower Miocene succession of the Northern Apennines, Italy. By integrating structural, petrographic, isotopic, and fluid inclusion data, we show that: (1) the main kinematic activity of the Tellaro detachment occurred between ∼8 and 4 km depths and peak temperature ∼190 °C; (2) dilational breccias, tens of cubic meters in volume, are frequently associated with major low-angle fault segments; (3) slip along misoriented planes was favored by elevated fluid pressures and low differential stress; and (4) the fault system was characterized by transient permeability pulses and overpressure buildups, associated with multiple fracturing and cementation events that caused the downward migration of master slip surfaces.Results presented in this study show that: (1) in a fluid-active regime, continental crustal thinning can occur for shallow values of fault dip; (2) low-angle normal faults have a great influence on fluid circulation within the upper crust; and (3) episodic permeability enhancement and destruction in detachment faults can promote overpressure buildups, triggering deformation episodes. 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- W2279233239 title "Fluid pressure cycles, variations in permeability, and weakening mechanisms along low-angle normal faults: The Tellaro detachment, Italy" @default.
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