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DOI10.1016/j.epsl.2021.117010
Meso- to nano-scale evidence of fluid-assisted co-seismic slip along the normal Mt. Morrone Fault, Italy: Implications for earthquake hydrogeochemical precursors
Coppola M.; Correale A.; Barberio M.D.; Billi A.; Cavallo A.; Fondriest M.; Nazzari M.; Paonita A.; Romano C.; Stagno V.; Viti C.; Vona A.
发表日期2021
ISSN0012821X
卷号568
英文摘要Fluids play an important role in seismic faulting both at hypocentral depths during earthquake nucleation and at shallower crustal levels during rupture propagation. Pre- to co-seismic anomalies of crustal fluid circulation have been identified by hydrogeochemical and seismological monitoring and interpreted as potential precursors of strong earthquakes. To shed light on the role of fluids in seismic and precursory mechanisms, the active carbonate-hosted principal slip zone (7-8 cm thick) of the exhumed (exhumation < 3 km) normal Mt. Morrone Fault (central Apennines) has been investigated with a multi-disciplinary approach from the macro- to the nano-scale. The distal slip zone consists of white cementitious calcite-rich bands and red cataclastic bands composed of dolomite and calcite clasts embedded in a clay-rich matrix. The proximal slip zone consists of subparallel ultracataclastic layers separated by sharp slip surfaces. The ultracataclastic layers mutually inject/overprint, bearing evidence of granular fluidization, dolomite thermal decomposition, and clay amorphization. Fluid inclusions and the distribution of both trace and major elements reveal the inflow of both shallow and deep external fluids into the slip zone. Presumably, the deep fluids originated from a magmatic-like source and ascended along the fault during pre-seismic dilation and seismic ruptures, interacting with shallow phyllosilicate-rich flysch deposits and the fluids hosted within them. In this context, vanadium-rich fluidized microlayers along the exhumed Mt. Morrone Fault are reminiscent of vanadium-rich potential hydrogeochemical precursors arose in the shallow aquifers of the study area since a few months before the 2016 Mw 6.0 Amatrice earthquake. © 2021 Elsevier B.V.
关键词coseismic deformationfluidsMt. Morrone faultnormal faultseismic precursorsslip zone
英文关键词Calcite; Decomposition; Earthquakes; Faulting; Fluidization; Fluids; Hydrogeology; Iron; Silicates; Topography; Vanadium; Coseismic deformation; Hydrogeochemical; Hypocentral depth; Mt morrone fault; Nano scale; Normal faults; Seismic faulting; Seismic precursors; Seismic slips; Slip zones; Aquifers; coseismic process; deformation; earthquake precursor; fault slip; hydrogeochemistry; normal fault; seismicity; Abruzzi; Italy; L'Aquila; Mount Morrone
语种英语
来源期刊Earth and Planetary Science Letters
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/203061
作者单位Department of Earth Sciences, Sapienza University of Rome, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Palermo, Italy; Consiglio Nazionale delle Ricerche, IGAG, Rome, Italy; CERTEMA Ricerca e Innovazione, Cinigiano, Grosseto, Italy; Institut de Sciences de la Terre, Université Grenoble-Alpes, Grenoble, France; Dipartimento di Geoscienze, University of Padova, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy; Dipartimento di Scienze, Roma Tre University, Rome, Italy; Dipartimento di Scienze Fisiche, della Terra e dell'Ambiente, University of Siena, Italy
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Coppola M.,Correale A.,Barberio M.D.,et al. Meso- to nano-scale evidence of fluid-assisted co-seismic slip along the normal Mt. Morrone Fault, Italy: Implications for earthquake hydrogeochemical precursors[J],2021,568.
APA Coppola M..,Correale A..,Barberio M.D..,Billi A..,Cavallo A..,...&Vona A..(2021).Meso- to nano-scale evidence of fluid-assisted co-seismic slip along the normal Mt. Morrone Fault, Italy: Implications for earthquake hydrogeochemical precursors.Earth and Planetary Science Letters,568.
MLA Coppola M.,et al."Meso- to nano-scale evidence of fluid-assisted co-seismic slip along the normal Mt. Morrone Fault, Italy: Implications for earthquake hydrogeochemical precursors".Earth and Planetary Science Letters 568(2021).
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