SE33 Pre-eruptive processes I

Convener: Marti, J.
Co-Convener(s): Carroll, M.R.; Fulignati, P.;
Gudmundsson, A.
Thursday, 23 April 1998
Lecture Room: ATHENA

Chairperson: Gudmundsson, A.

• 14:00 DE NATALE, G.; GAETA, F.S.; TROISE, C.; PETRAZZUOLI, S.M.; CASTAGNOLO, D.; PINGUE, F.; PELUSO, F.; TRIGILA, R.
  Mechanical versus thermalfluid-dynamical effects in the generation of Caldera unrests: examples from Campi Flegrei (Italy) and Rabaul (New Guinea)
• 14:15 MARTI, J.; GUDMUNDSSON, A.
  Overlapping collapse calderas
• 14:30 MARTI, J.; TURON, F.
  Field, experimental and numerical comparison between Andean type and ocean-island collapse calderas
• 14:45 BEAUDUCEL, F.; CORNET, F.H.
  Constraints from displacements and tilt data on the magma chamber at Merapi (Java)
• 15:00 FERNANDEZ, J.; TIAMPO, K.; RUNDLE, J.B.; YU, T.-T.; ALONSO-MEDINA, A.; CARRASCO, J.M.
  Modelling deformation, potential and gravity changes caused by a magmatic intrusion
• 15:15 TIAMPO, K.F.; RUNDLE, J.B.; FERNANDEZ, J.M.; LANGBEIN, J.
  Ellipsoidal vs. sperical models for magmatic intrusion sources
• 15:30 FERNANDEZ, J.; FOLCH, A.; RUNDLE, J.B.; MARTI, J.
  Ground deformation in a viscoelastic multi-layered system. A comparation between analytical and numerical solutions for point and extended sources
• 15:45 MARTI, J.; SORIANO, C.; TURON, E.; VIRAMONTE, J.G.
  Collapse calderas devleoped on strike-slip faults
• 16:00 ANNEN, C.; LENAT, J.-F.; PROVOST, A.
  Modelling of dike intrusions and vlolcano growth
• 16:15 MULARGIA, F.; BONAZZA, D.; GONZATO, G.; CICCOTTI, M.
  Laboratory measurement of the elastic and fracture properties of lavas
• 16:30 JENTZSCH, G.; JAHR, TH.; WEISE, A.; SCHREIBER, U.; SEEBER, G.; VÖLKSEN, C.; PUNONGBAYAN, R.S.
  Mayon volcano; Philippines: mass movements after the eruption of 1993 detected by microgravity and GPS measurements
• 16:45 RESTA, F.; MARTI, J.; TURON, E.
  Phonolitic dikes at the Las Canadas Caldera (Tenerife, Canary Islands): constraints on the geometry and location of shallow magma chambers
• 17:00 GUDMUNDSSON, A.; LARSEN, G.
  Large explosive eruptions in Icelandic central volcanoes
• 17:15 END OF PART I
   

SE33 Pre-eruptive processes - Poster Session

Convener: Marti, J.
Co-Convener(s): Carroll, M.R.; Fulignati, P.;
Gudmundsson, A.
Display Time: Monday, 09:00 - Friday, 12:00
Authors in Attendance: Thursday, 17:30 - 19:00
Poster Area: RHODES - SE

• SE201 MARIANELLI, P.; METRICH, N.; SBRANA, A.
  A melt inclusion study of volatiles during the 1994 lava fountaining activity at Vesuvius
• SE202 BICHLER, M.; SORTINO, F.
  Evolution of trace elements in fumarolic gases at Vulcano Island (Italy)
• SE203 BOLOGNESI, L.
  Earthquake-induced changes in the isotopic composition of the water in the geothermal reservoir at Vulcano Island, Italy
   

SE33 Pre-eruptive processes II

Convener: Marti, J.
Co-Convener(s): Carroll, M.R.; Fulignati, P.; Gudmundsson, A.
Friday, 24 April 1998
Lecture Room: ATHENA

Chairperson: Bonafede, M.

• 08:30 LARSEN, G.; GUDMUNDSSON, A.
  Geometry, morphology and formation of Holocene crater rows in Iceland
• 08:45 DYER, N.; KENT, R.; WILSON, L.
  Controlling influences in the lateral propagation of dikes and the position of fissure eruptions
• 09:00 KENT, R.; DYER, N.; WILSON, L.
  Modelling the flow of magma in dikes using numerical methods
• 09:15 CENNI, N.; BONAFEDE, M.
  A porous flow model of magma migration within Mt. Etna: the influence of extended sources and permeability anisotropy
• 09:30 MENAND, T.; TAIT, S.
  Magma transport in dike swarms
• 09:45 BONAFEDE, M.; RIYALTA, E.
  Tensile cracks in layered media
• 10:00 MARINONI, L.B.; GUDMUNDSSON, A.
  Dyke emplacement in shield-stage formations of Tenerife
• 10:15 MATTIOLI, G.S.; DIXON, T.H.; FARINA, F.; HOWELL, E.S.; JANSMA. P.; SMITH, A.L.
  Magma chamber evolution inferred from GPS geodesy of Soufriere Hills volcano, Montserrat

10:30 BREAK

Chairperson: Carroll, M.R.

• 11:00 STRECK, M.J.; DILLES, J.H.
  Sulfur content of apatite tracking magma degassing evidence from the Yerington Porphyry Copper Batholith, Nevada
• 11:15 VAN CALSTEREN, P.; BLACK, S.; VAN WYK DE VRIES, B.; HAWKESWORTH, C.J.
  Constraints on the timescale from nucleation to emanation of volcanic gases
• 11:30 NUCCIO, P.M.; PAONITA, A.; SORTINO, F.
  Composition changes of volcanic gas and computation of magma ascent
• 11:45 HAWKESWORTH, C.J.; THOMAS, L.; TURNER, S.P.; ZELLMER, G.; VAN CALSTEREN, P.
  The timescales of melt generation and differentiation: evidence from U-series isotopes
• 12:00 FOLCH, A.; MARTI, J.; CODINA, R.
  A numerical model for temporal variations during explosive central-vent eruptions
• 12:15 GAUTHIER, P.-J.; CONDOMINES, M.
  Radon loss from magmas: degassing mechanisms and consequences on 226Ra-210Pb disequilibria in lavas
• 12:30 GAUTHIER, P.-J.; LE CLOAREC, M.-F.; CONDOMINES, M.; PENNISI, M.
  Radionuclide constraints on shallow degassing processes at Stromboli volcano
• 12:45 ROUSE, P.J.; CARROLL, M.R.
  Phase equilibria of Na-rich phonolites from Montana Blanca, Tenerife

13:00 LUNCH

Chairperson: van Calsteren, P.

• 14:00 GARDNER, J.E.; HILTON, M.; CARROLL, M.R.
  Magma ascent rate and melt-vapor equilibrium in rhyoltic melts
• 14:15 MOURTADA-BONNEFOI, C.C.; LAPORTE, D.
  "Easy" homogeneous bubble nucleation in hydrous rhyolitic melts
• 14:30 FOLCH, A.; MARTI, J.
  Overpressure in replenished felsic magma chambers
• 14:45 STAUDACHER, TH.; SEIDEL, J.L.; RICARD, L.P.; CHEMINEE, J.L.
  Radon network at Piton de la Fournaise, Reunion Island: seismic crises anticipated by 222Rn pusles
• 15:00 SIGNORELLI, S.; FRANCALANCI, L.; MANETTI, P.; VAGGELLI, G.; CAPACCIONI, B.; ROMANO, C.
  Pre-eruptive volatile (H2O, F, Cl and S) contents of phonolitic magmas feeding the 3600 years-old Avellino eruption from Vesuvius, southern Italy
• 15:15 SIGNORELLI, S.; FRANCALANCI, L.; MANETTI, P.; VAGGELLI, G.; CAPACCIONI, B.
  Determination of H2O, F, Cl and S in volcanic glasses from the A.D. 79 Vesuvius eruption, southern Italy

15:30 BREAK

Chairperson: Marti, J.

• 16:00 CIONI, R.
  Pre-eruption volatiles in AD 79 magma chamber of Vesuvius (Italy)
• 16:15 DI LIBERTO, V.; NUCCIO, P.M.; PAONITA, A.; SORTINO, F.
  Variations of fumarolic gases composition at Vulcano Island (Italy) related to hydrothermal system evolution
• 16:30 FULIGNATI, P.; GIONCADA, A.; SBRANA, A.
  Rare Earth elements behaviour in the alteration facies of an active high-sulfidation hydrothermal system (Vulcano, Aeolian Islands, Italy)
• 16:45 CIONI, R.; MARIANELLI, P.; SANTACROCE, R.
  An empirical thermometer for Vesuvius magmas
• 17:00 ORSI, G.; PETRAZZUOLI, S.M.; WOHLETZ, K.
  The interplay of mechanical and thermo-fluid dynamical systems during unrest episodes in Calderas: the Campi Flegrei Caldera (Italy) case
• 17:15 FRANCALANI, L.; TOMMASINI, S.; CONTICELLI, S.; DAVIES, G.R.
  Magma chamber dynamics in the XX Century at Stromboli Volcano, Italy: contributions from mineralogical, chemical and isotope data
• 17:30 ARMIENTI, P.; SIMAKIN, A.G.; EPELBAUM, M.B.
  Experimental degassing of silicatic melts in continuous pressure drop with coupled crystallization *
• 17:45 END OF SESSION