http://hdl.handle.net/2122/164 Search the Channel search http://www.earth-prints.org/simple-search http://hdl.handle.net/2122/3389 Title: Interazione tra fluidi endogeni ed acquifero regionale dei bacini idrogeologici del fiume Marta e del torrente Vezza (Monti Vulsini e Monti Cimini, Lazio Settentrionale) <br/> <br/>Authors: Capelli, G.; università roma tre, DSG; Di salvo, C.; università roma tre, DSG; Proietti, R.; università roma tre, DSG; Mazza, R,; università roma tre, DSG; Barberi, F.; università roma tre, DSG; Carapezza, M. L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia <br/> <br/>Editors: Politecnico di Milano; Dipartimento Ingegneria Idraulica e Ambientale <br/> <br/>Abstract: Il domino vulcanico laziale a nord del fiume Tevere ospita una estesa falda di interesse regionale sostenuta da una potente sequenza di depositi appartenenti alle unità alloctone di facies toscana e tolfetana. http://hdl.handle.net/2122/2893 Title: Geophysical and hydrogeological experiments from a shallow hydrothermal system at Solfatara Volcano, Campi Flegrei, Italy: Response to caldera unrest <br/> <br/>Authors: Bruno, P. P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia; Ricciardi, G. P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia; Petrillo, Z.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia; Di Fiore, V.; Consiglio Nazionale delle Ricerche, Istituto Per l’Ambiente Marino e Costiero, Naples, Italy.; Troiano, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia; Chiodini, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia <br/> <br/>Abstract: Integration of high-resolution geophysical and hydrogeological investigations at Solfatara Volcano, Campi Flegrei, Italy, allowed us to (1) image the shallow and intermediate subsurface to the crater, (2) elucidate patterns in the shallow subsurface degassing, and (3) refine and upgrade volcano-monitoring strategies for this dynamic area. Our results show that the subsurface to the crater can be divided roughly into two zones: a dry, outcropping layer overlying a horizon saturated by hydrothermal fluids. Within this saturated zone, intersections of dominant NW- and ENE-striking structural lineaments act as preferential escape conduits for the fluids which generate high microseismic noise amplitudes in the southeastern part of the crater. Hydrogeological data suggest an uprising of the isotherms below Solfatara crater, and a marked increment of fluid degassing, over the last 40 years. Sudden variations of both seismic noise level and noise cycling are positively correlated with early stages of ground inflation during the AD 2000 uplift. We believe therefore that monitoring of seismic noise can be used for upgrading early warning strategies in this sector of the Campi Flegrei volcanic system. http://hdl.handle.net/2122/2774 Title: Hydrologic and geochemical survey of the lake “Specchio di Venere” (Pantelleria island, Southern Italy) <br/> <br/>Authors: Aiuppa, A.; Università di Palermo, Dipartimento CFTA; D'Alessandro, W.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia; Gurrieri, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia; Madonia, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia; Parello, F.; Università di Palermo, Dipartimento CFTA <br/> <br/>Abstract: Hydrological and geochemical studies performed on Lake Specchio di Venere on Pantelleria island (Italy) indicate that this endorheic basin has been formed through upwelling of the water table, and that it is continuously fed by the thermal springs situated on its shores. The lake is periodically stratified both thermally and in salinity, albeit this stratification is rather unstable over time since meteorological events such as strong rain or wind can determine the mixing of its waters. Periodical analyses of the lake water chemistry show large variations of the salt content due to the yearly evaporation-rain dilution cycle. These processes are also responsible for the saline stratification during steady meteorological conditions. The mineralogical characterisation of the bottom sediments shows the almost exclusive presence of neoformation minerals, mainly carbonates, formed in response to the pH gradient between spring- (pH≈6) and lake-waters (pH≈9). Finally, the CO2 partial pressures in the lake water slightly exceeding the atmospheric one, are due to the large amounts of CO2 brought to the lake through the bubbling free gas phase of the thermal springs. Nevertheless the high pH value of the lake water, its small volume and its periodical mixing prevent dangerous built up of this gas. http://hdl.handle.net/2122/2719 Title: Oscillating flow of a compressible fluid through deformable pipes and pipe networks: wave propagation phenomena <br/> <br/>Authors: Bernabé, Yves; MIT, USA <br/> <br/>Editors: Vinciguerra, Sergio; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; Bernabé, Yves; MIT, USA <br/> <br/>Abstract: see Abstract Volume