Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9945
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dc.contributor.authorallCaracausi, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallPaternoster, M.; Dipartimento di Scienze, Università della Basilicata, Potenza, Italyen
dc.date.accessioned2015-06-12T12:59:55Zen
dc.date.available2015-06-12T12:59:55Zen
dc.date.issued2015en
dc.identifier.urihttp://hdl.handle.net/2122/9945en
dc.description.abstractGas from mud volcanoes, dry mofettes, springs, and wells were sampled in a region of active tectonics and high seismicity in the southern Apennines (Italy), where there is a long history of disastrous earthquakes, with the latest (Ms = 6.9) occurring in 1980. The fluids consist of a mixture of mantle-derived and crust-derived volatiles, with a low atmosphere-derived contribution, as identified by the He isotope signature and He/Ne ratio measurements. One year of monthly monitoring of the He concentrations and He isotopes revealed no seasonal modifications or variations induced by low seismicity. There are extraordinary high outputs of 4He produced in the crust in the area (up to 2.5 × 1028 atoms yr 1). These outputs cannot be solely due to the whole-rock production rate and a long-lasting diffusion degassing through the crust of the produced 4He. This study explored the relation between the volume of fractured rock and the related release of He. The results support that crustal degassing can be controlled by tectonic events resulting in earthquakes. The high seismicity in this sector of the Apennines provides the conditions necessary for a massive release of He that has accumulated in the rock over a long time period. We identified that the assessed high crustal 4He output can be attributed to an intense fracturing of a calculable volume of rock, which gives new constraints on the volume of rock involved in high-magnitude earthquakes in the region.en
dc.language.isoEnglishen
dc.publisher.nameAmerican Geophysical Unionen
dc.relation.ispartofJournal of geophysical research - solid earthen
dc.relation.ispartofseries4/120(15)en
dc.subjectxtraordinary high radiogenic helium flux in continental regionen
dc.subjectRelease of crustal 4He due to rock fracturingen
dc.subjectRelationship between rock involved in earthquake and radiogenic He fluxen
dc.titleRadiogenic helium degassing and rock fracturing: a case study of the southern Apennines active tectonic regionen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber2200-2211en
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistryen
dc.identifier.doi10.1002/2014JB011462en
dc.description.obiettivoSpecifico2T. Tettonica attivaen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.relation.issn0148-0227en
dc.contributor.authorCaracausi, A.en
dc.contributor.authorPaternoster, M.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentDipartimento di Scienze, Università della Basilicata, Potenza, Italyen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextreserved-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.deptUniversità della Basilicata, Potenza, Italy-
crisitem.author.orcid0000-0003-2510-2890-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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