Agosta F.

Álvarez-Valero A.

Buttitta D.

Caracausi A.

Paternoster M.

Zummo F.

English

Archivio della Ricerca - Università della Basilicata

Your Abstract #31154 Submission Has Been ReceivedPrint /save this pageYou have submitted the following abstract to the Goldschmidt 2025 Conference. Aconfirmation email has been sent to the submitter and all named authors. Receipt of thisnotice does not guarantee that your submission was complete or free of errors.Abstract InformationAbstract ID:31154Primary Session:04f Traditional methods, new advances, and perspectives in exploring thegeochemical processes that drive hazardous volcanism and earthquakesAbstract Title:Relationship between paleo-fluids and active extensional fault systems:new perspectives to explore crustal deformation processesAuthors (presenting author in bold):Prof. Michele Paternoster, PhD , Filippo Zummo , Antonio Álvarez-Valero ,Fabrizio Agosta , Dario Buttitta  and Antonio Caracausi , (1)IstitutoNazionale di Geofisica e Vulcanologia, (2)University of Basilicata, (3)Universityof SalamancaAbstract Text:During fault activity, the fluid ascendance and circulation over time might bedocumented by analysing the fault-related veins and coated slickensides. Thevein infill often contains fluid inclusions (FI), which small droplets of themineralising paleo-fluid (gas and liquid) trapped inside single crystals. FI’s areexcellent tracers to assess the fluid origin, temperature, pressure ofhomogenization and the extent of fluid-rock interactions. In this study, wefocus on the southern Apennines fold-and-thrust belt (Italy), which is currentlydownfaulted by high-angle extensional faults including both slip-parallel andcomb veins. There, we investigate the faults exposed in the Contursihydrothermal basin area, which is characterized by a high seismicity (Mw < 4in 10 the last years), and lies very close (< 20km) to the epicentral area of theMw 6.9 1980 earthquake. The Contursi low‐enthalpy hydrothermal system(water temperature < 50°C) is associated to the outgassing of deep sourcedvolatiles.1,2 2 32 1 1,3This study is based on a multidisciplinary approach that combines fieldstructural analysis of the faulted outcrops with microstructural, stableisotopes (Carbon and Oxygen), trace elements, and both noble gases andδD  in FI of the calcite veins sampled along single fault zones. The resultsshow that the paleo-fluids were characterized by a low-salinity, and derivedeither from depths of 3 ~ 4 km or ca. 8 ~ 10 km. Moreover, the noble gases inFIs show a prevalent crustal component added to a mantle one (up to 20%). Infact, the highest He/ He value (1.38Ra) in FI’s fits well with those of thecurrent gas emissions (1.41Ra). However, we also observe a variability of Heisotopic signature in the FI (0.20-1.38Ra), which can be interpreted as due toearly trapping processes (e.g., paleo-earthquakes). We conclude that thecurrent outgassing of deep fluids could be associated to a long-lasting crustaldeformation, posing the basis for future works aimed at better understatingthe role of fluids in active fault and consequently in the activities ofgeochemical monitoring of active seismic areas such as the site selection aswell as to interpret the long data series.Keywords:Noble gas, earthquakes and fluid inclusionsSubmitter's E-mail Address:michele.paternoster@unibas.itSubmitter Full Name:Michele PaternosterPreferred Presentation Style:PosterConference Attendance:In personRegistration:I understand that the presenting author named in this submission mustregister for the conference by 21 May 2025.Submission Permission and Copyright:I grant non-exclusive copyright for my abstract and any related uploadedcontent to the Conference Exchange and the conference owners. I givepermission for my details to be stored in the conference database. I, and thepresenting author (if different than the submitter), agree to be contacted bythe conference organizers about this submission. I agree to the recording andH2O3 4First AuthorPresenting AuthorProf. Michele Paternoster, PhDEmail: michele.paternoster@unibas.itIstituto Nazionale di Geofisica e VulcanologiaPalermoItalyUniversity of BasilicataApplied and Basic SciencesCampus Macchia Romana -Potenza PotenzaItalySecond AuthorFilippo ZummoEmail: filippo.zummo@unibas.itUniversity of BasilicataApplied and Basic SciencesCampus Macchia Romana -Potenza PZ 85100ItalyThird AuthorAntonio Álvarez-ValeroEmail: aav@usal.esUniversity of SalamancaSpainFourth AuthorFabrizio AgostaEmail: fabrizio.agosta@unibas.itUniversity of BasilicataApplied and Basic SciencesProfCampus Macchia Romana -online display of any presentations scheduled as a result of this submission. Iconfirm all listed authors have agreed to these terms.Potenza PZ 85100ItalyFifth AuthorDario ButtittaEmail: dario.buttitta@ingv.itIstituto Nazionale di Geofisica e VulcanologiaSezione di palermoVia Ugo La Malfa, 153Palermo Italy 90019ItalySixth AuthorAntonio CaracausiEmail: antonio.caracausi@ingv.itUniversity of SalamancaSalamancaSpainIstituto Nazionale di Geofisica e VulcanologiaResearcherVia Ugo La Malfa, 153Palermo 90146ItalyIf necessary, you can make changes to your abstractsubmission up until the abstract submission deadline onWednesday, 26 February 2025 (23:59 CET).To access your submission in the future:If you are a listed as an author on this abstract, you canaccess the submission via 'My Goldschmidt' on theGoldschmidt2025 website.If you are not listed as an author, use the direct link to yourabstract submission given in one of the automaticconfirmation emails that were sent to you during thesubmission. 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Relationship between paleo-fluids and active extensional fault systems: new perspectives to explore crustal deformation processes

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Relationship between paleo-fluids and active extensional fault systems: new perspectives to explore crustal deformation processes

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