caa a22 4500 477062385 CHVBK 20180405111404.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/s004450050124 doi (NATIONALLICENCE)springer-10.1007/s004450050124 Diffuse emission of CO2 from the Fossa crater, Vulcano Island (Italy) [Elektronische Daten] [G. Chiodini, F. Frondini, B. Raco]  Numerous measurements of CO2 degassing from the soil, carried out with the accumulation chamber method, indicate that in the period April-July 1995 the upper part of the Fossa cone released a total output of 200 t d-1 of CO2, which corresponds to approximately 1000 t d-1 of steam. These large amounts of fluids are of the same order of magnitude as those released by the high temperature fumarolic field located inside the crater. The spatial distribution of soil gas fluxes shows that the main structures releasing CO2 are the inner slopes of the crater and a NW-SE line, located NE of the crater rim, which correspond to the main direction of Vulcano Island active faults. The comparison of the φCO2 maps with the soil temperature distribution, derived from both direct measurements and airborne infrared images, indicates the occurrence of extensive condensation of fumarolic steam within the upper part of the Fossa cone, whose total amount is comparable to the rainfall budget. Part of the condensate which originates from this process contributes to the recharge of the phreatic aquifer of Porto Plain, modifying the chemical and isotopic composition of the groundwater. Springer-Verlag Berlin Heidelberg, 1996 Key words CO2 nationallicence Soil degassing nationallicence Thermal water nationallicence Volcanic surveillance nationallicence Vulcano Island nationallicence Chiodini G. Dipartimento di Scienze della Terra dell'Università di Perugia, p.za Università, I-06100 Perugia, Italy Fax: +39 75 5853203, IT aut Frondini F. Dipartimento di Scienze della Terra dell'Università di Perugia, p.za Università, I-06100 Perugia, Italy Fax: +39 75 5853203, IT aut Raco B. Istituto di Geocronologia e Geochimica Isotopica CNR, via C. Maffi 36, I-56100 Pisa, Italy, IT aut https://doi.org/10.1007/s004450050124 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004450050124 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chiodini G. Dipartimento di Scienze della Terra dell'Università di Perugia, p.za Università, I-06100 Perugia, Italy Fax: +39 75 5853203, IT aut NATIONALLICENCE 700 1- Frondini F. Dipartimento di Scienze della Terra dell'Università di Perugia, p.za Università, I-06100 Perugia, Italy Fax: +39 75 5853203, IT aut NATIONALLICENCE 700 1- Raco B. Istituto di Geocronologia e Geochimica Isotopica CNR, via C. Maffi 36, I-56100 Pisa, Italy, IT aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer