Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/11777
DC Field | Value | Language |
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dc.date.accessioned | 2018-04-24T12:52:13Z | en |
dc.date.available | 2018-04-24T12:52:13Z | en |
dc.date.issued | 2017-03 | en |
dc.identifier.uri | http://hdl.handle.net/2122/11777 | en |
dc.description.abstract | The availability of a large amount of surface geological data and subsurface information gathered by the oil industry, together with seismic and geodetic data, allowed us to define and analyse the active structures in the Val d'Agri area of the southern Apennines. Taking into account that the study of interseismic deformation can be significant to identify locked fault areas that can potentially slip, in this study we present 2D elastoplastic finite-element models to reproduce interseismic characteristics of the study area. This hosts the largest Europe's onshore oil field and is characterised by an active extensional tectonic regime, as inferred from earthquake focal mechanisms and fault slip data from late Quaternary structures. Based on high-quality seismic profiles tied with deep well logs, we constructed a detailed geological section across the study area. Outcropping units are dissected by numerous brittle structures that formed at various stages during the tectonic evolution of the Apennines, while the deep ones are dominated by deeply rooted major faults. The rheological behaviour has been constrained by the reconstruction of the thermal structure of the fold and thrust belt, using available information from the foreland Apulian Platform and from temperature data from a series of wells. Starting from the geological model, we reproduced interseismic deformation by means of finite-element numerical modelling, varying boundary conditions and unlocking different fault segments. Our numerical models provide new insights into the controversial and widely debated active tectonic setting of the Val d'Agri area, confirming the major role played by structural inheritance and reactivation processes. In fact, recent low-magnitude seismicity tends to illuminate fault segments consisting of pre-existing reverse faults reactivated as normal faults in the present-day stress field. These long-lived, mature fault systems occurring in the buried Apulian Platform carbonates (and underlying basement) represent major brittle structures that cumulated displacements of up to a few kilometres over geologic time. As a result of their reactivation within the late Quaternary extensional stress field, these long-lived crustal structures are capable of nucleating also moderate- to large-magnitude earthquakes. The decoupling between deep and shallow structural levels, and the different inherited structures affecting them, explain the apparent contrast between the subdued surface expression of active fault systems and the known occurrence of large magnitude seismic events in the study area, thus reconciling apparently contrasting geological and geophysical constraints. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Rendiconti Online della Società Geologica Italiana | en |
dc.relation.ispartofseries | /42 (2017) | en |
dc.subject | Active tectonics | en |
dc.subject | Fault reactivation | en |
dc.subject | Stress field | en |
dc.subject | Seismicity | en |
dc.subject | Extensional tectonics | en |
dc.title | Structural inheritance controlling active crustal deformation in the Val d’Agri area (southern Apennines, Italy): new insights from finite element modelling | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 111-114 | en |
dc.subject.INGV | Seismology | en |
dc.subject.INGV | Tectonophysics | en |
dc.identifier.doi | 10.3301/ROL.2017.26 | en |
dc.relation.references | Ascione A., Mazzoli S., Petrosino P. & Valente E. (2013) - A decoupled kinematic model for active normal faults: Insights from the 1980, MS = 6.9 Irpinia earthquake, southern Italy. Geological Society of America Bulletin 125, 1239-1259, http://dx.doi.org/10.1130/B30814.1. Bernard P. & Zollo A. (1989) - The Irpinia (Italy) 1980 earthquake: detailed analysis of a complex normal faulting. Journal of Geophysical Research, 94, 1631-1647. Borraccini F., De Donatis M., Di Bucci D., Mazzoli S., Megna A., Nesci O., Santini S. & Savelli D., Tramontana, M. & Triggiani P. (2002) - Analisi della tettonica quaternaria nel basso bacino del F. Metauro (Marche settentrionali) e nell’adiacente offshore adriatico attraverso l’integrazione di dati sismici, geomorfologici, stratigrafici e strutturali. Studi Geologici Camerti, 2/2002, 29-43. Candela S., Mazzoli S., Megna A. & Santini S. (2015) - Finite element modelling of stress field perturbations and interseismic crustal deformation in the Val d’Agri region, southern Apennines, Italy. Tectonophysics, 257, 245-259. Cello G., Gambini R., Mazzoli S., Read A., Tondi E. & Zucconi V. (2000) - Fault zone characteristics and scaling properties of the Val d’Agri fault system (Southern Apennines, Italy). Journal of Geodynamics, 29, 293-307. Devoti R., Esposito A., Pietrantonio G., Pisani A.R. & Riguzzi F. (2011) - Evidence of large-scale deformation patterns from GPS data in the Italian subduction boundary. Earth and Planetary Science Letters, 311, 1-12. Giano S. I., Maschio L., Alessio M., Ferranti L., Improta S. & Schiattarella M. (2000) - Radiocarbondating of active faulting in the Agri High Valley, Southern Italy. Journal of Geodynamics, 29, 371-386. Improta L., Valoroso L., Piccinini D. & Chiarabba C. (2015) - A detailed analysis of wastewater-induced seismicity in the Val d’Agri oil field (Italy). Geophysical Research Letters, 42, 2682-2690, http://dx.doi.org/10.1002/2015GL063369. Macchiavelli C., Mazzoli S., Megna A., Saggese F., Santini S. & Vitale S. (2012) - Applying the Multiple Inverse Method to the analysis of earthquake focal mechanism data: new insights into the active stress field of Italy and surrounding regions. Tectonophysics, 580, 124-149. Mazzoli S., Ascione A., Candela S., Iannace A., Megna A., Santini S. & Vitale S. (2013) - Subduction and continental collision events in the southern Apennines: constraints from two crustal cross-sections. Rendiconti Online Società Geologica Italiana, 25, 78-84. Mazzoli S., Ascione A., Buscher J. T., Pignalosa A., Valente E. & Zattin M. (2014) - Low-angle normal faulting and focused exhumation associated with late Pliocene change in tectonic style in the southern Apennines (Italy). Tectonics, 33, 1802-1818, http://dx.doi.org/10.1002/2014TC003608. Mazzoli S., Barkham S., Cello G., Gambini R., Mattioni L., Shiner P. & Tondi E. (2001) - Reconstruction of continental margin architecture deformed by the contraction of the Lagonegro Basin, Southern Apennines, Italy. Journal of the Geological Society, 158, 309-319. Megna A., Barba S., Santini S. & Dragoni M. (2008) - Effects of geological complexities on coseismic displacement: hints from 2D numerical modelling. Terra Nova, 20, 173-179, http://dx.doi.org/10.1111/j.1365-3121.2008.00800.x. Morandi S. & Ceragioli E. (2002) - Integrated interpretation of seismic and resistivity images across the «Val d’Agri» graben (Italy). Annals of Geophysics, 45, 259-271. Soliva R., Schultz R.A. & Benedicto A. (2005) - Three-dimensional displacement-length scaling and maximum dimension of normal faults in layered rocks. Geophysical Research Letters, 32, L16302, http://dx.doi.org/10.1029/2005GL023007. Valoroso L., Improta L., Chiaraluce L., Di Stefano R., Ferranti L., Govoni A. & Chiarabba C. (2009) - Active faults and induced seismicity in the Val d’Agri area (Southern Apennines, Italy). Geophysical Journal International, 178, 488-502. Valoroso L., Improta L., De Gori P. & Chiarabba C. (2011) - Upper crustal structure, seismicity and pore pressure variations in an extensional seismic belt through 3D and 4-D VP and VP/VS models: The example of the Val d’Agri area (southern Italy). Jour. Geophys. Res., 116, B07303, http://dx.doi.org/10.1029/2010JB007661. Westaway R. & Jackson J. (1987) - The earthquake of 1980 November 23 in Campania-Basilicata (Southern Italy). Geophysical Journal of the Royal Astronomical Society, 90, 375-443. | en |
dc.description.obiettivoSpecifico | 1T. Deformazione crostale attiva | en |
dc.description.journalType | N/A or not JCR | en |
dc.contributor.author | Megna, Antonella | en |
dc.contributor.author | Santini, Stefano | en |
dc.contributor.author | Mazzoli, Stefano | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Dipartimento di Scienze Pure e Applicate (DiSPeA), Sezione di Fisica, Università di Urbino, Via Santa Chiara 27, 61029 Urbino, Italy | en |
dc.contributor.department | Dipartimento di Scienze della Terra, dell’Ambiente e delle Risorse (DiSTAR), Università di Napoli Federico II, Largo San Marcellino 10, 80138 Napoli, Italy | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Dipartimento di Scienze della Terra, dell’Ambiente e delle Risorse (DiSTAR), Università di Napoli Federico II, Largo San Marcellino 10, 80138 Napoli, Italy | - |
crisitem.author.orcid | 0000-0002-3536-1805 | - |
crisitem.author.orcid | 0000-0003-4494-1251 | - |
crisitem.author.orcid | 0000-0003-3911-9183 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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Megna_et_al_2017_ROL.pdf | 2.62 MB | Adobe PDF |
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