Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2030
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dc.contributor.authorallMariucci, M. T.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallMϋller, B.; Karlsruhe University, Geophysical Instituteen
dc.date.accessioned2007-01-16T08:50:19Zen
dc.date.available2007-01-16T08:50:19Zen
dc.date.issued2003-01-09en
dc.identifier.urihttp://hdl.handle.net/2122/2030en
dc.description.abstractIn Italy, the horizontal stress directions are well constrained in many regions, but the tectonic regime is not well known because the stress magnitudes are unknown. Our intention is to improve the knowledge of crustal stress in Italy, both at shallow depth and in low seismicity areas. Therefore, we inferred the tectonic regime from the comparison between the depth of breakout occurrence and the physical properties of the rocks in 20 boreholes. The critical value of the maximum horizontal stress, for which the effective tangential stress at the borehole wall overcomes the rock strength to form breakouts, could be computed from rock strength and density. Comparing the theoretical stress distributions for different tectonic regimes with the depth distribution of breakout occurrence, it is possible to infer the tectonic regime that fits best to the breakout depth distribution. We investigated boreholes up to 6 km deep located in different tectonic environments over the Italian peninsula: the Po Plain, the Apenninic chain, the Adriatic foredeep and the Tyrrhenian Quaternary volcanic region. These wells are characterised by breakout data of good quality (A, B and C, according to World Stress Map quality ranking system). The results are in general agreement with the style of faulting derived from earthquake focal mechanisms and other stress indicators. Our results show a predominance of a normal faulting (NF) regime in the inner Apennines and both normal faulting and strike–slip faulting (SS) style in the surrounding regions, possibly also associated with changes in the tectonic regime with depth.en
dc.format.extent854105 bytesen
dc.format.mimetypeapplication/pdfen
dc.language.isoEnglishen
dc.publisher.nameElsevieren
dc.relation.ispartofTectonophysicsen
dc.relation.ispartofseries1-2/361(2003)en
dc.subjectactive stressen
dc.subjecttectonic regimeen
dc.subjectborehole breakouten
dc.subjectItalyen
dc.titleThe tectonic regime in Italy inferred from borehole breakout dataen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber21-35en
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.05. Stressen
dc.description.fulltextreserveden
dc.contributor.authorMariucci, M. T.en
dc.contributor.authorMϋller, B.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentKarlsruhe University, Geophysical Instituteen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.orcid0000-0001-6029-1514-
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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