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Diffuse emission of CO 2 from the Fossa crater, Vulcano Island (Italy)

  • ORIGINAL PAPER
  • Published: September 1996

Diffuse emission of CO2 from the Fossa crater, Vulcano Island (Italy)

Bulletin of Volcanology

volume 58pages 41–50 (1996)

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Abstract

 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.

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Xem thêm: Máy phát điện xoay chiều là gì ?

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Received: 1 September 1995 / Accepted: 8 January 1996

Xem thêm: Axit Nitric HNO3. Phương Trình Phản ứng Của C + HNO3, HNO3 Ra H3PO4, NaNO3 Ra HNO3

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Chiodini, G., Frondini, F. & Raco, B. Diffuse emission of CO2 from the Fossa crater, Vulcano Island (Italy). Bull Volcanol 58, 41–50 (1996). https://doi.org/10.1007/s004450050124

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  • Issue Date: September 1996

  • DOI:

    https://doi.org/10.1007/s004450050124

  • Key words CO2
  • Soil degassing
  • Thermal water
  • Volcanic surveillance
  • Vulcano Island

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