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Bulletin of Volcanology

, Volume 57, Issue 6, pp 440–450 | Cite as

Factors influencing the height of Hawaiian lava fountains: implications for the use of fountain height as an indicator of magma gas content

  • E. A. Parfitt
  • L. Wilson
  • C. A. Neal
Original Paper

Abstract

The heights of lava fountains formed in Hawaiian-style eruptions are controlled by magma gas content, volume flux and the amounts of lava re-entrainment and gas bubble coalescence. Theoretical models of lava fountaining are used to analyse data on lava fountain height variations collected during the 1983–1986 Pu'u 'O'o vent of Kilauea volcano, Hawaii. The results show that the variable fountain heights can be largely explained by the impact of variations in volume flux and amount of lava re-entrainment on erupting magmas with a constant gas content of ∼0.32 wt.% H2O. However, the gas content of the magma apparently declined by ∼0.05 wt.% during the last 10 episodes of the eruption series and this decline is attributed to more extensive pre-eruption degassing due to a shallowing of the sub-vent feeder dike. It is concluded that variations in lava fountain height cannot be simply interpreted as variations in gas content, as has previously been suggested, but that fountain height can still be a useful guide to minimum gas contents. Where sufficient data are available on eruptive volume fluxes and extent of lava entrainment, greatly improved estimates can be made of magma gas content from lava fountain height.

Key words

Lava fountains Magma gas content Volume flux Gas bubble coalescence Lava re-entrainment Pu'u 'O'o eruption 

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References

  1. Dobran F (1992) Nonequilibrium flow in volcanic conduits and application to the eruptions of Mt. St. Helens on May 19, 1980 and Vesuvius in AD79. J Volcanol Geotherm Res 49: 285–311Google Scholar
  2. Dvorak JJ, Okamura AT (1985) Variations in tilt rate and harmonic tremor amplitude during the January–August 1983 East Rift eruptions of Kilauea volcano, Hawai'i. J Volcanol Geotherm Res 25: 249–258Google Scholar
  3. Dvorak JJ, Okamura AT, English TT, Koyanagi RY, Nakata JS, Sako MK, Tanigawa WT, Yamashita KM (1986) Mechanical response of the south tank of Kilauea Volcano, Hawaii, to intrusive events along the rift systems. Tectonophysics 124: 193–209Google Scholar
  4. Gerlach TM (1986) Exsolution of H2O, CO2, and S during eruptive episodes at Kilauea Volcano, Hawaii. J Geophys Res 91: 12177–12185Google Scholar
  5. Gerlach TM, Graeber EJ (1985) Volatile budget of Kilauea volcano. Nature 313: 273–277Google Scholar
  6. Giberti G, Wilson L (1990) The influence of geometry on the ascent of magma in open fissures. Bull Volcanol 52: 515–521Google Scholar
  7. Greenland LP (1986) Gas analyses from the Pu'u 'O'o eruption in 1985, Kilauea volcano, Hawaii. Bull Volcanol 48: 341–348Google Scholar
  8. Greenland LP (1988) Gases from the 1983–84 east-rift eruption, USGS Prof Pap 1463: 145–153Google Scholar
  9. Greenland LP, Rose WI, Stokes JB (1985) An estimate of gas emissions and magmatic gas content from Kilauea volcano. Geochim Cosmochim Acta 49: 125–129Google Scholar
  10. Harris DM (1981) The microdetermination of H2O, CO2, and SO2 in glass using a 1280°C microscope vacuum heating stage, cryopumping, and vapor pressure measurements from 77 to 273 K. Geochim Cosmochim Acta 45: 2023–2036Google Scholar
  11. Harris DM, Anderson AT (1983) Concentrations, sources, and losses of H2O, CO2, and S in Kilauean basalt. Geochim Cosmochim Acta 47: 1139–1150Google Scholar
  12. Head J, Wilson L (1987) Lava fountain heights at Pu'u' O'o, Kilauea, Hawai'i: indicators of amount and variations of exsolved magma volatiles. J Geophys Res 92: 13715–13719Google Scholar
  13. Head JW, Wilson L (1989) Basaltic pyroclastic eruptions: influence of gas-release patterns and volume fluxes on fountain structure, and the formation of cinder cones, spatter cones, rootless flows, lava ponds and lava flows. J Volcanol Geotherm Res 37: 261–271Google Scholar
  14. Heliker C, Wright TL (1991) The Puu Oo-Kupaianaha eruption of Kilauea. EOS 72: 521–530Google Scholar
  15. Hoffmann JP, Ulrich GE, Garcia MO (1990) Horizontal ground deformation patterns and magma storage during the Puu Oo eruption of Kilauea volcano, Hawaii: episodes 22–42. Bull Volcanol 52: 522–531Google Scholar
  16. Moore JG (1965) Petrology of deep-sea basalt near Hawaii. Am J Sci 263: 40–52Google Scholar
  17. Okamura AT, Dvorak JJ, Koyanagi RY, Tanigawa WR (1988) Surface deformation during dike propagation: the 1983 east rift eruption of Kilauea volcano, Hawaii. USGS Prof Pap 1463: 165–181Google Scholar
  18. Parfitt EA, Wilson L (1994) The 1983–86 Pu'u 'O'o eruption of Kilauea volcano, Hawaii: a study of dike geometry and eruption mechanisms for a long-lived eruption. J Volcanol Geotherm Res 59: 179–206Google Scholar
  19. Parfitt EA, Wilson L (1995) Explosive volcanic eruptions IX — the transition between Hawaiian-style lava fountaining and Strombolian explosive activity. Geophys J Intern 121: 226–232Google Scholar
  20. Richter DH, Ault WU, Eatoni JP, Moore JG (1964) The 1961 eruption of Kilauea volcano, Hawaii. USGS Prof Pap 474-D: 1–34Google Scholar
  21. Richter DH, Eaton JP, Murata KJ, Ault WU, Krivoy HL (1970) Chronological narrative of the 1959–60 eruption of Kilauea volcano, Hawaii USGS Prof Pap 537-E: 1–73Google Scholar
  22. Sparks RSJ (1978) The dynamics of bubble formation and growth in magmas: a review and analysis. J Volcanol Geotherm Res 3: 1–37Google Scholar
  23. Ulrich GE, Heliker CC, Hoffmann JP. The Puu Oo/Kupaianaha eruption of Kilauea Volcano, Hawaii: episodes 21–48, 1984–1987. USGS Prof Pap, in pressGoogle Scholar
  24. Vergniolle S, Jaupart C (1990) Dynamics of degassing at Kilauea volcano, Hawaii. J Geophys Res 95: 2793–2809Google Scholar
  25. Wilson L (1980) Relationships between pressure, volatile content and ejecta velocity in three types of volcanic explosion. J Volcanol Geotherm Res 8: 297–313Google Scholar
  26. Wilson L, Head JW (1981) Ascent and eruption of basaltic magma on the Earth and Moon. J Geophys Res 86: 2971–3001Google Scholar
  27. Wilson L, Head JW (1988) Nature of local magma storage zones and geometry of conduit systems below basaltic eruption sites: Pu'u 'O'o, Kilauea East Rift, Hawaii, example. J Geophys Res 93: 14785–14792Google Scholar
  28. Wilson L, Sparks RSJ, Walker GPL (1980) Explosive volcanic eruptions — IV. The control of magma chamber and conduit geometry on eruption column behaviour. Geophys J Astron Soc 63: 117–148Google Scholar
  29. Wilson L, Parfitt EA, Head JW (1995) Explosive volcanic eruptions — VIII. The role of magma recycling in controlling the behaviour of Hawaiian-style lava fountains. Geophys J Intern 121: 215–225Google Scholar
  30. Wolfe EW, Garcia MO, Jackson DB, Koyanagi RY, Neal CA, Okamura AT (1987) The Puu oo eruption of Kilauea volcano, episodes 1–20, January 3, 1983, to June 8, 1984. USGS Prof Pap 1350: 471–508Google Scholar
  31. Wolfe EW, Neal CA, Banks NG, Duggan TJ (1988) Geological observations and chronology of eruptive events. USGS Prof Pap 1463: 1–97Google Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • E. A. Parfitt
    • 1
  • L. Wilson
    • 1
    • 2
  • C. A. Neal
    • 3
  1. 1.Department of Geological SciencesBrown UniversityProvidenceUSA
  2. 2.Environmental Science DivisionLancaster UniversityLancasterUK
  3. 3.Alaska Volcano ObservatoryU.S. Geological SurveyAnchorageUSA

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