Abstract
A thermo-mechanical model of calderas, based on the assumption that the rocks behave as no-tension materials, is proposed. The medium surrounding the magma chamber is considered, in compression, as a non-homogeneous elastic material — with elastic moduli depending on the temperature — and incapable of sustaining any tensile stress. This assumption allows us to follow the development of fractures at the ground surface and in the subsoil. The latter can be correlated with the localization of earthquake hypocentres and with the occurrence of eruptions. A finite element analysis of the model is performed. Comparisons between the ground surface deformations, observed at Campi Flegrei during the 1982–1984 crisis, and the deformations predicted by the model are developed. The proposed model seems to give a reasonable picture of many of the complex phenomena — ground uplift, fractures of the earth surface and in the subsoil, seismic activity — that occur in the volcanic area of Campi Flegrei.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Armienti P, Barberi F, Bizouard H (1983) The Phlegrean Fields magma evolution within a shallow chamber. J Volcanol Geotherm Res 17:289–311.
Armienti P, Barberi F, Innocenti F (1984) A model of the Phlegraean Fields magma chamber in the last 10500 years. Bull Volcanol 44-2:349–358.
Aster RC, Meyer RP, De Natale G, Zollo A, Martini M, del Pezzo E, Scarpa R, Iannuccone G (1992) Seismic Investigation of the Campi Flegrei (this vol.).
Baidyuk BV (1969) Mechanical properties of rocks at high temperatures and pressures. Transi from Russian, Consultants Bureau, New York.
Barberi F, Innocenti F, Lirer L, Munno R, Pescatore T (1978) The Campania Igninbrite: a major prehistoric eruption in the Neapolitan area (Italy). Bull Volcanol 41-1:1–22.
Berrino G, Corrado G, Luongo G, Toro B (1984) Ground deformation and gravity changes accompanying the 1982 Pozzuoli uplift. Bull Volcanol 44-2:187–199.
Bianchi R, Coradini A, Federico C, Giberti G, Sartoris G, Scandone R (1984) Modelling of surface ground deformation in the Phlegrean Fields volcanic area. Bull Volcanol 44-2:321–330.
Bianchi R, Coradini A, Federico C (1987) Modelling of surface deformation in volcanic areas: the 1970–72 and 1982–84 crises of Campi Flegrei, Italy. J Geophys Res 92:14139–14150.
Bruni P., Chelini W, Sbrana A, Verdiani G (1985) Deep exploration of the S Vito area, Pozzuoli, Naples: Well S. Vitol. Proc 3rd Int Sem Eur Geotherm Update, Munich 29 Nov–1 Dec 1983, EUR 8853 EN, pp 390-406.
Como M, Lembo M (1988) Sull’istituzione di un modello termomeccanico del Bradisismo Flegreo. In: Omaggio a Giulio Ceradini. Dipart Ing Strutt Geotec, Univ Roma La Sapienza, Esagrafica, Roma, pp 249-263.
Lama RD, Vutukuri VS (1978) Handbook on mechanical properties of the rock. Trans Tech Publ, Clausthal.
Lirer L, Luongo G, Scandone R (1987) On the volcanological evolution of Campi Flegrei. Eos Trans AGU 68:226–234.
Mogi K (1958) Relations between eruptions of various volcanoes and the deformations of the ground surface around them. Bull Earthq Res Inst Univ Tokio 36:99–134.
Nadai A (1950) Theory of flow and fracture of solids. McGraw Hill, New York.
Nunziata O, Rapolla A (1981) Interpretation of gravity and magnetic data in the Phlegrean Fields geothermal area, Naples, Italy. J Volcanol Geotherm Res 9:209–230.
Ortolani F, Pagliuca S (1984) Le lesioni nel suolo del centro storico di Pozzuoli⋯. Dipart Scie Terr, Univ Napoli.
Parascandola A (1983) I fenomeni bradisismici del Serapeo di Pozzuoli, 1947. New printing, Genovese, Napoli.
Romano G, Romano M (1985) Elastostatics of structures with unilateral conditions on strain and displacements. Int Conf Unilateral Probl Struct AnalInt Conf Unilateral Probl Struct Anal, Ravello, 1983, CISM, Springer Berlin Heidelserg New York, pp 315–338.
Rosi M, Sbrana S, Principe V (1983) The Phlegrean Fields: structural evolution, volcanic history and eruptive mechanism. Volcanol Geotherm Res 17:273–288.
Walsh JB, Decker W (1971) Surface deformation associated with volcanism. J Geophys Res76:3291–3302.
Zienkiewicz C, Vallapian S, King IP (1968) Stress analysis of rock as a no-tension material. Geotechnique 18:56–66.
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1992 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Como, M., Lembo, M. (1992). A Thermo-Mechanical Model of the Inflation and Seismicity of Volcanic Calderas: An Application to the Campi Flegrei System. In: Gasparini, P., Scarpa, R., Aki, K. (eds) Volcanic Seismology. IAVCEI Proceedings in Volcanology, vol 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77008-1_33
Download citation
DOI: https://doi.org/10.1007/978-3-642-77008-1_33
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-77010-4
Online ISBN: 978-3-642-77008-1
eBook Packages: Springer Book Archive