Effects of magma storage and ascent on the kinetics of crystal growth (original) (raw)

Abstract

The size distributions of crystals of olivine, plagioclase and oxides of the 1991/93 eruption at Mt. Etna (Italy) are analyzed. The simultaneous collection of this information for different minerals gives precious insight into the cooling history of lavas. Three distinct episodes are detectable: a storage of the magma in a deep reservoir, characterized by nearly constant and low nucleation and growth rates (near to equilibrium); an ascent phase, with an ever increasing nucleation rate related to volatile exsolution; and finally a quenching phase. In addition to geochemical and geophysical evidence, the similarity of the crystal size distributions of the present eruption with those of previous ones of this century makes it possible to exclude that crystal size distributions of Etnean lavas are due to mixing of different populations. This strongly suggests that the main features of the volcano feeding system have not changed despite observed variations in the magma output rates.

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References (47)

  1. Allard B, Sotin C (1988) Determination of mineral phase percent- ages in granular rocks by image analysis on a microcomputer. Comp Geosci 14:261 269
  2. Armienti P, Clocchiatti R, D'Orazio M, Innocenti F, Petrini R, Pompilio M, Tonarini S, Villari L (1993)The long-standing 1991-1993 Mount Etna eruption: petrography and Geochem- istry of lavas. Volcanol Acta (in press)
  3. Armienti P, Innocenti F, Pareschi MT, Pompilio M, Rocchi S (1991) Crystal population density in not stationary volcanic systems: estimate of olivine growth rate in basalts of Lanzarote (Canary Islands). Mineral Petrol 44:181-196
  4. Armienti P, Calvari S, Innocenti F, Pompilio M,Villari L (1990) Petrography and chemical composition. In: Barberi F, Bertag- nini A, Landi P (eds) Mount Etna: the 1989 eruption. Giardini Pisa, pp 30 33
  5. Armienti P, Innocenti F, Petrini R, Pompilio M, Villari L (1989) Petrology and Sr-Nd isotope geochemistry of recent lavas from Mt. Etna: bearing on the volcano feeding system. J Volcanol Geotherm Res 39:315 327
  6. Armienti P, Calvari S, Innocenti F, Pompilio M,Villari L (1988) Sub-aphyric alkali basalts from Mt. Etna: inferences on the depth and composition of the source of magma. Rend Soc It Mineral Petrol 43:877 991
  7. Barberi F, Carapezza ML, Valenza M, Villari L (1992) L'eruzione 1991 1992 dell'Etna e gli interventi per fermare o ritardare l'avanzata della lava. Giardini Pisa Brandeis G, Jaupart C (1987) The kinetics of nucleation and crystal growth and scaling laws for magmatic crystallization. Contrib Mineral Petrol 96:24-34
  8. Calzolari G, Cipriani TA, Corsi P (1976) Generation and testing of pseudo-random numbers with assigned statistical properties to be used in the stochastic simulation of econometric models. IBM Tech Rep n G513-3545
  9. Cashman KV (1988) Crystallization of Mount St. Helens 1980-1986 dacite: a quantitative textural approach. Bull Volcanol 50:194- 209
  10. Cashman KV (1990) Textural constraints on the kinetics of crystal- lization of igneous rocks. Rev Mineral 24:259 314
  11. Cashman KV (1992) Groundmass crystallization of Mount St. He- lens dacite, 1980-1986: a tool for interpreting shallow magmatic processes. Contrib Mineral Petrol 109:431 449
  12. Cashman KV, Marsh BM (1988) Crystal size distribution (CSD) in rocks and the kinctics and dynamics of crystallization. II: Makaopuhi lava lake. Contib Mineral Petrol 99:292-305
  13. Clocchiatti R, Metrich N (1984) T6moignages de la contamination dans les produits des 6ruptions explosives des Mt. Silvestri (1892) et Mt. Rossi (1669). Bull Volcanol 47:909-928
  14. Cooper RF, Kohlstedt DL (1982) Interfacial energies in the olivine- basalt system. In: Akimoto S, Manghnami MH (eds) tligh pres- sure research in geophysics, Adv Earth Plant Sci, vol 12, Center for Acadmic Publications Tokyo, pp 217 228
  15. Cox KV, Bell J D, Pankhrust RJ (1979) The interpretation of ig- neous rocks. London, Allen and Unwin
  16. Cristofolini R, Gresta S, lmposa S, Menza S, Patan6 G (1987) An approach to problcms of energy sources at Mount Etna based on seismological and volcanological data. Bull Volcanol 49:72%736
  17. Dolfi D, Trigila R (1983) Clinopyroxene solid solutions and water in magmas: results in the system phonolitic tephrite-H20. Mineral Mag 47:347-351
  18. Donaldson CH (1976) An experimental investigation of olivine morphology. Contrib Mineral Petrol 57:187-213
  19. Dowty E (1980) Crystal growth and nucleation theory and numeri- cal simulation of igneous crystallization. In: Hargraves RB (ed) Physics of magmatic processes. Princeton University Press, Princeton, pp 385-417
  20. Ferrucci F (1990) Seismicity. In: Barberi F, Bertagnini A, Landi P (eds) Mount Etna: The 1989 eruption. Giardini, Pisa, pp 36-43
  21. Ferrucci F, RasA R, Gaudiosi G, Azzaro R, Imposa S (1993) Mt. Etna a modcl for the 1989 eruption. J Volcanol Geotherm Res 56:67 79
  22. Ghiorso MS, Carmichael ISE., Rivers ML, Sack RO (1983) The Gibbs free energy of mixing of natural silicatic liquids: an ex- panded regular solution approximation for the calculation of magmatic intensive variables. Contrib Mineral Petrol 84:107- 145
  23. Him A~ Nercessian A, Sapin M, Ferrucci F, Wittlinger G (1991) Seismic heterogeneity of Mt Etna: structure and activity. Geophys J Int 105:139 153
  24. Hofmann AW (1980) Diffusion in silicate melts: a critical review, in: Hargravcs RB (ed) Physics of magmatic processes. Princeton University Press, Princeton, pp 419-485
  25. Hughes JW, Guest JE, Duncan AM (1990) Changing styles of effu- sive eruption on Mount Etna since AD 1600. In: Ryan MP (ed) Magma transport and storage. Wiley, pp 385-406
  26. Jambon A, Lussiez P, Clocchiatti R, Weisz J, tternandez J (1992) Olivine growth rate in a tholeiitic basalt: an experimental study of melt inclusions in plagioclase. Chem Geol 96:27%287
  27. John F (1971) Partial differential equation. Springer, New York Berlin Heidelberg
  28. Kilburn C (1989) Surface of aa flow-fields on Mount Etna, Sicily: morphology, rheology, crystallization and scaling phcnomena. In: Fink J (ed) Lava Flows and Domes. Springer, Berlin Heidel- berg New York, pp 129-156
  29. Kirkpatrick RJ (1977) Nucleation and growth of plagioclase, Makaopuhi and Alae lava lakes, Kilauea Volcano, Hawaii. Geol Soc Am Bull 88:78 84
  30. Kirkpatrick RJ, Gilpin RR, Hays JF (1976) Kinetics of crystal growth from silicate melts: anorthite and diopside. J Geophys Res 81:5715-5720
  31. Lipman PW, Banks NG, Rhodes JM (1985) Degassing induced effects on lava rheology. Nature 317:604 607
  32. Lofgren GE (1974) An experimental study of plagioclase crystal morphology: isothermal crystallization. Am J Sci 274:243273
  33. Lofgren GE (1980) Experimental studies on the dynamic crystalliza- tion of silicate melts. In: Hargraves RB (ed) The physics of magmatic processs. Princeton University Press, Princeton, pp 487-551
  34. Maaloe S, Tumyr O, James D (1989) Population density and zoning of olivine phenocrysts in tholeiites from Kauai, Hawaii. Contrib Mineral Petrol 101:176 186
  35. Macpherson GJ (1984) A model for predicting the volumes of vesi- cles in submarine basalts. J Geol 92:73-82
  36. Mangan MT (1990) Crystal size distribution systematics and the determination of magma storage times: the 1959 eruption of Kilauea volcano, Hawaii. J Volcanol Geotherm Res 44:295-302
  37. Marsh BD (1988) Crystal size distribution (CSD) in rocks and the kinetics and dynamics of crystallisation. I.Theory. Contrib Min- eral Petrol 99:277 291
  38. Metrich N, Clocchiatti R, Mosbah M (1993) The 198940 activity of Etna. Magma mingling and ascent of an HaO-C1-S rich basaltic magma. Evidence for the phenocryst melt inclusions. J Volcanol Geotherm Res (in press)
  39. Montalto A, Distefano G, Patan6 G (1992) Seismic patterns and fluid-dynamic features preceding and accompanying the Janu- ary 15, 1990 eruptive paroxysm on Mt. Etna (Italy). J Vocanol Geotherm Res 51:133-143
  40. Muncill GE, Lasaga AC (1987) Crystal-growth kinetics of plagio- clase in igneous systems: one atmosphere experiments and ap- proximation of a simplified growth model. Am Mineral 72:299- 311
  41. Pareschi MT, Pompilio M, Innocenti F (1990) Automated evalua- tion of volumetric grain-size distribution density from thin-sec- tion images. Comp Geosci 16:1067-1084
  42. Scick R, Cosentino M, Lombardo G, Patan~ G (1982) Volcanic tremor at Mt. Etna -a brief description. Mcm Soc Geol It 23 : 191-196
  43. Soholev AV, Kamenetskiy VS, Metrich N, Clocchiatti R, Konokova NN, Devirts AL, Ustinov VI (1990) Volatile regime and crystal- lization conditions in Etna Hawaiite lavas. Geochymiya 9: i277-1290. (English translation)
  44. Spohn T, Hort M, Eischer H (1988) Numerical simulation of the crystallization of multicomponent melts in thin dikes or sills. 1. The liquidus phase. J Geophys Res 93 B5:488t~4894
  45. Toramaru A (1991) Model of nucleation and growth of crystals in cooling magmas. Contrib Mineral Petrol 108:106-117
  46. Trigila R, Spera EJ, Aurisicchio C (1990) The 1983 Mount Etna eruption: thermochemical and dynamical inferences. Contrib Mineral Petrol 104:594-608
  47. Weill DE, Hon R, Navrotsky A (1980) The igneous system CaMgSi206-CaAlaSi2Os-NaAISi3Q: variations on a classic theme by Bowen. In: Hargraves RB (ed) Physics of magmatic processes. Princeton University Press, Princeton, pp 49-92 Editorial responsibility: J. Hoefs