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Di Fiore, B.
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Di Fiore, B.
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- PublicationOpen AccessExamples of application of tensorial resistivity probability tomography to architectonic and archaeological targets(2002)
; ; ; ; ;Di Fiore, B.; Dipartimento di Geofisica e Vulcanologia, Università «Federico II», Napoli, Italy ;Mauriello, P.; Istituto per le Tecnologie Applicate ai Beni Culturali, Consiglio Nazionale delle Ricerche, Roma, Italy ;Monna, D.; Istituto per le Tecnologie Applicate ai Beni Culturali, Consiglio Nazionale delle Ricerche, Roma, Italy ;Patella, D.; Dipartimento di Scienze Fisiche, Università «Federico II», Napoli, Italy; ; ; We present the results of the application of the tensor resistivity method to the assessment of the state of conservation of some architectonic features of the S.Giovanni a Carbonara monumental monastery (Naples, Italy) and to the recognition of buried remains in the archaeological site of the roman Port of Claudius at Fiumicino (Rome, Italy). The 3D tomographic approach, based on the concept of resistivity anomaly source occurrence probability, has been used for the analysis of the invariant parameter related to the trace of the determinant of the apparent resistivity tensor.148 280 - PublicationOpen AccessAbout the shallow resistivity structure of Vesuvius volcano(2008-02)
; ; ; ; ; ; ; ; ;Troiano, A.; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Napoli, Italy ;Petrillo, Z.; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Napoli, Italy ;Di Giuseppe, M. G.; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Napoli, Italy ;Balasco, M.; Istituto di Metodologie per l’Analisi Ambientale (IMAA, CNR), Tito Scalo (Pz), Italy ;Diaferia, I.; Dipartimento di Geologia e Geofisica, Università degli Studi di Bari, Italy ;Di Fiore, B.; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Napoli, Italy ;Siniscalchi, A.; Dipartimento di Geologia e Geofisica, Università degli Studi di Bari, Italy ;Patella, D.; Dipartimento di Fisica, Università degli Studi di Napoli «Federico II», Napoli, Italy; ; ; ; ; ; ; Magnetotelluric (MT) soundings performed in the past in the volcanic area of Mt. Vesuvius by two independent research groups showed in the same places MT apparent resistivity curves with very similar shape, but statically shifted by one order of magnitude, at least. To try to resolve this ambiguity new controlled source audio-magnetotelluric (CSAMT) measurements have been carried out in the same MT sites. The interpretation of the CSAMT dataset, combined with that of two shallow dipole-dipole geoelectrical resistivity tomographies previously carried out in the area have allowed a reliable electrical structure to be recovered down to a few km of depth, which will next be used for a best constrained re-interpretation of the deep MT soundings.449 746 - PublicationRestrictedMagnetotelluric profiling along the crop-04 section in the Southern Apennines(2005)
; ; ; ; ; ;Patella, D.; Dipartimento di Scienze Fisiche, Università di Napoli, Napoli, Italy ;Siniscalchi, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Petrillo, Z.; Dipartimento di Geologia e Geofisica, Università di Bari, Bari, Italy ;Improta, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Di Fiore, B.; Dipartimento di Scienze Fisiche, Università di Napoli, Napoli, Italy; ; ; We show the results of a magnetotelluric (MT) survey along a SW-NE profile from the Tyrrhenian to the Adriatic sea close to the CROP-04 transect, orthogonal to the main structural axis of Southern Apennines, integrated by a NW-SE profile placed on the Apulia foreland. The NW-SE profile displayed a nearly 1D apparent resistivity pattern, which was used to constrain the 2D modelling along the orthogonal profile. To improve the 2D model across the main SW-NE profile, a combined MT-gravity analysis was carried out until mutual consistency was reached. Starting from the southwestern side of the SW-NE profile, the MT cross-section allows the shallow Tertiary basinal units, with resistivity less than 100 m, to be differentiated from the rootless nappes of the Apennine thrust, with resistivity less than 1000 m and thickness around 7 km, which include the Western carbonate platform and Lagonegro basin sequence. Proceeding downward in the southwestern portion of the MT SW-NE cross-section, a layer, about 1 km thick and with resistivity in the range 3-30 m, is found between the Apennine thrust and a lower stratum with resistivity less than 10000 m, extending down to the bottom of the model placed at 15 km of depth, which is assumed to correspond to the Apulia carbonate platform. As the conductivity of the thin layer is consistent with the presence of high fluid concentrations, the thin layer is assumed to indicate a major decollement level. The whole SW-NE MT cross-section delineates the large-scale trend of the top of the Apulia carbonate platform. Its SW-bending beneath the Bradano Trough and marked deepening down to 5 km beneath the Ofanto basin conforms to the results from the CROP-04 seismic profile. A body with resistivity greater than 10000 m, found beneath the Apulia platform at a depth from about 6 km beneath the Apulia foreland likely down to more than 15 km beneath the Ofanto basin, is interpreted as the crystalline basement, which appears separated from the overlying Apulia platform by a conductive layer ascribed to Permo-Triassic clastic sequences. A further important feature of the resistivity model across the SW-NE profile is the presence of two laterally bounded vertical bodies with resistivity less than 3 m, cutting the whole Apulia platform and part of the Apennine thrust, beneath the Sele graben and Ofanto basin, respectively. Accounting for geochemical, geothermal and active and passive seismological data, such low resistivity regions are interpreted as highly fractured zones characterized by melt intrusions and/or fluid circulation. Referring to the MT model across the NW-SE secondary profile, a quite simple structure is observed crossing the foreland-foredeep areas. A slow bending of the Apulia platform and a thickening of the much less resistive deposits of the Bradano Trough are observed proceeding northwestwards. A remarkable result is that the Apulia platform does not show any important variation of thickness along the entire NW-SE section246 48 - PublicationOpen AccessExamples of application of electrical tomographies and radar profiling to cultural heritage(2000-04)
; ; ; ; ;Cammarano, F.; Dipartimento di Scienze Fisiche, Università «Federico II», Napoli, Italy ;Di Fiore, B.; Istituto per le Tecnologie Applicate ai Beni Culturali, CNR, Roma, Italy ;Mauriello, P.; Dipartimento di Scienze Fisiche, Università «Federico II», Napoli, Italy ;Patella, D.; Dipartimento di Scienze Fisiche, Università «Federico II», Napoli, Italy; ; ; We present the results of an integrated application of the self-potential and resistivity methods to the recognition of buried remains in the archaeological site of Sumhuram (Khor-Rouri, Oman), and of the self-potential, resistivity and radar methods to the assessment of the state of conservation of the Aksum obelisk (Rome, Italy). A tomographic approach based on the concept of anomaly source occurrence probability was used for the analysis of the self-potential and resistivity data. Tomographic imaging provided reliable space patterns of the most probable specific target boundaries and notably improved the information quality of each single geophysical method.252 559 - PublicationRestrictedSurface evidence of active tectonics along the Pergola-Melandro(2007)
; ; ; ; ; ; ; ; ; ;Moro, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Amicucci, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Cinti, F. R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Doumaz, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Montone, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Pierdominici, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Saroli, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Stramondo, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Di Fiore, B.; Dipartimento di Scienze - Università di Napoli, “Federico II”, via Cintia - 80126 Naples, Italy; ; ; ; ; ; ; ; The Pergola-Melandro basin (southern Apennines) is characterized by a below-average release of seismic energy within a wider earthquake-prone region. In fact, it is placed between the maximum intensity areas of two of the most destructive earthquakes reported in the Italian seismic catalogue: theM≥7.0 Agri Valley earthquake in 1857 and the Ms = 6.9 Irpinia earthquake in 1980. In thiswork, we present geomorphologic analysis, electrical resistivity surveys and field data, including paleoseismologic evidence, that provided the first direct constraints on the presence of a∼20 kmlong, seismogenic fault at the western border of the Pergola-Melandro basin. We also obtained geological information on the recent deformation history of the Pergola-Melandro fault that indicates the occurrence of at least four surface faulting earthquakes since Late Pleistocene age. The empirical relationships linking fault length and magnitude would assign to the Pergola-Melandro fault an event of M≥6.5. These new data have important implication on the seismic hazard assessment of this sector of the Apennines, that also includes large cities such as Potenza, about 20 km far from the recognized Pergola-Melandro fault, and highlight the relevance of the geological approach in areas where the seismological records are poor. Finally, we discuss the Pergola-Melandro fault within the regional seismotectonic context. In particular, this fault belongs to the system of normal faults with an apenninic orientation, both NE and SW dipping, accommodating the NE-crustal extension taking place in the area. Nearby faults, similarly oriented but with opposite dip, may coexist whether linked by secondary faults that act as slip transfer structures. This complex system of active faults would be more realistic than a narrow band of faults running along the belt axis with an homogenous geometry, and moreover, it is more consistent with the high extension rate measured by historical earthquakes and geodetic data.370 41