Tectonophysics2022，Vol.82718.DOI:10.1016/j.tecto.2022.229269

Middle Pleistocene fluid infiltration with 10-15 ka recurrence within the seismic cycle of the active Monte Morrone Fault System (central Apennines, Italy)

Vignaroli, Gianluca Rossetti, Federico Petracchini, Lorenzo Argante, Valentina Bernasconi, Stefano M. Brilli, Mauro Giustini, Francesca Yu, Tsai-Luen Shen, Chuan-Chou Soligo, Michele
Tectonophysics2022，Vol.82718.DOI:10.1016/j.tecto.2022.229269
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  • NSTL
  • Elsevier

Middle Pleistocene fluid infiltration with 10-15 ka recurrence within the seismic cycle of the active Monte Morrone Fault System (central Apennines, Italy)

Vignaroli, Gianluca 1Rossetti, Federico 2Petracchini, Lorenzo 3Argante, Valentina 2Bernasconi, Stefano M. 4Brilli, Mauro 3Giustini, Francesca 3Yu, Tsai-Luen 5Shen, Chuan-Chou 6Soligo, Michele2
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作者信息

  • 1. Univ Bologna
  • 2. Univ Roma Tre
  • 3. CNR
  • 4. Swiss Fed Inst Technol
  • 5. Natl Acad Marine Res
  • 6. Natl Taiwan Univ
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Abstract

This study integrates field, geochronological and geochemical data to constrain fluid circulation in the damage and core zone of the seismogenic Monte Morrone Fault System (MMFS), central Apennines (Italy). Faulting along the MMFS evolved from a diffuse deformation at the damage zone towards progressive localisation of a narrower fault core and, finally, to (re)activation of discrete slip surfaces at shallower crustal conditions. Multiple generations of carbonate mineralisations, including veins and slickfibers, occur along the main fault surfaces. Carbonate mineralisations are locally fractured and incorporated in the surrounding cataclasites, documenting repetitive structurally-controlled fluid infiltration during transient episodes of permeability creation and destruction. Stable carbon and oxygen isotopes of the carbonate mineralisations document a dominant meteoric water source probably mixed with deeper circulating waters having longer residence time. Clumped-isotope yield formation temperatures of vein and slickenfibers in the range between 23 and 40 degrees C. U-Th dating of carbonate mineralisations yield Middle Pleistocene ages (from 268 to 189 ka BP), with a 10-15-ka cyclicity that we link to the coseismic rejuvenation of the structural permeability in the fault zone. We propose that fault-related mineralisations recorded the interactions among tectonic deformation and climate during the Quaternary. Our study is the first documentation of fault-controlled recurrence intervals in fluid infiltration in a seismically active fault of central Apennines.

Key words

Normal faulting/Mineralising fluid/Seismic cycle/U-Th carbonate dating/Monte Morrone Fault/Central Apennines/BACK-ARC EXTENSION/NORTHERN APENNINES/TRAVERTINE DEPOSITS/TECTONIC EVOLUTION/MAIN SHOCKS/THRUST BELT/U-SERIES/EARTHQUAKE/PERMEABILITY/PRESSURE

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出版年

2022
Tectonophysics

Tectonophysics

EISCI
ISSN：0040-1951
被引量4
参考文献量115
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