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Pasquarè, G.
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Pasquarè, G.
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- PublicationRestrictedLandsat 5 TM images and DEM in lithologic mapping of Payen Volcanic Field (Mendoza Province, Argentina)(2009)
; ; ; ; ; ;Fornaciai, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Bisson, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Mazzarini, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Del Carlo, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Pasquarè, G.; Dipartimento di Scienze della Terra, Università degli Studi di Milano, Milano, Italy; ; ; ; Satellite image such as Landsat 5 TM scene provides excellent representation of Earth and synoptic view of large geographic areas in different band combination. Landsat TM images allow automatic and semi-automatic classification of land cover, nevertheless the software frequently may have some difficulties in distinguishing between similar radiometric surfaces. In this case, the use of Digital Elevation Model (DEM) can be an important tool to identifydifferent surface covers. In this study, several False Color Composite (FCC) of Landsat 5 TM Image, DEM and the respective draped image of them, were used to delineate lithological boundaries and tectonic features of regional significance of the Payen Volcanic Field (PVF). PVF is a Quaternary fissural structure belonging to the back-arc extensional area of the Andes in the Mendoza Province (Argentina) characterized by many composite basaltic lava flow fields. The necessity to identify different lava flows with the same composition, and then with same spectral features, allows to highlight the improvement of synergic use of TM images and shaded DEM in the visual interpretation. Information obtained from Satellite data and DEM have been compared with previous geological maps and transferred into a topographical base map. Based on these data a new lithological map at 1:100.000 scale has been presented.425 55 - PublicationRestrictedA structural and geophysical approach to the study of fractured aquifers in the Scansano-Magliano in Toscana Ridge, southern Tuscany, Italy(2009-07)
; ; ; ; ; ; ; ; ; ;Francese, R.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy ;Mazzarini, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Bistacchi, A.; Dipartimento di Geologia e Geotecnologia, Università di Milano Bicocca, Milano, Italy ;Morelli, G.; Geostudi Astier S.r.l., Livorno, Italy ;Pasquarè, G.; Dipartimento di Geologia, Università di Milano, Milano, Italy ;Praticelli, N.; Dipartimento di Geoscienze, Università di Padova, Padova, Italy ;Robain, H.; Institute de Recherche pour le Développement, Bondy Cedex, France ;Wardell, N.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy ;Zaja, A.; Dipartimento di Geoscienze, Università di Padova, Padova, Italy; ; ; ; ; ; ; ; Fresh water availability has recently become a serious concern in the Italian Apennines, as various activities rely on a predictable supply. Along the ridge between Scansano and Magliano in Toscana, in southern Tuscany, the situation is further complicated by contamination of the nearby alluvial aquifers. Aquifers locally consist of thin fractured reservoirs, generally within low-permeability formations, and it can be difficult to plan the exploitation of resources based on conventional techniques. An integrated study based on geological data investigated the link between tectonics and groundwater circulation, to better define the hydrological model. After the regional identification of fault and fracture patterns, a major structure was investigated in detail to accurately map its spatial position and to understand the geometry and properties of the associated aquifer and assess its exploitation potential. The subsurface around the fault zone was clearly imaged using ground probing radar, two-dimensional and three-dimensional resistivity tomography, and three-dimensional shallow seismic surveys. The vertical and horizontal contacts between the different geological units of the Ligurian and Tuscan series were resolved with a high degree of spatial accuracy. Three-dimensional high-resolution geophysical imaging proved to be a very effective means of characterising small-scale fractured reservoirs.217 23