Shallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La Réunion Island)

Alessandro Aiuppa, Vlastélic, Gurioli, Aiuppa, Peltier, Favalli, Coppola, Ferrazzini, Moune, Di Muro, Arellano, Villeneuve, Galle, Bachèlery, Harris

Risultato della ricerca: Article

20 Citazioni (Scopus)

Abstract

Basaltic magma chambers are often characterized by emptying and refilling cycles that influence their evolution in space and time, and the associated eruptive activity. During April 2007, the largest historical eruption of Piton de la Fournaise (Île de La Réunion, France) drained the shallow plumbing system () and resulted in collapse of the 1-km-wide summit crater. Following these major events, Piton de la Fournaise entered a seven-year long period of near-continuous deflation interrupted, in June 2014, by a new phase of significant inflation. By integrating multiple datasets (lava discharge rates, deformation, seismicity, gas flux, gas composition, and lava chemistry), we here show that the progressive migration of magma from a deeper (below sea level) storage zone gradually rejuvenated and pressurized the above-sea-level portion of the magmatic system consisting of a vertically-zoned network of relatively small-volume magma pockets. Continuous inflation provoked four small () eruptions from vents located close to the summit cone and culminated, during August–October 2015, with a chemically zoned eruption that erupted of lava. This two-month-long eruption evolved through (i) an initial phase of waning discharge, associated to the withdrawal of differentiated magma from the shallow system, into (ii) a month-long phase of increasing lava and SO2 fluxes at the effusive vent, coupled with CO2 enrichment of summit fumaroles, and involving emission of less differentiated lavas, to end with, (iii) three short-lived (∼2 day-long) pulses in lava and gas flux, coupled with arrival of cumulative olivine at the surface and deflation. The activity observed at Piton de la Fournaise in 2014 and 2015 points to a new model of shallow system rejuvenation and discharge, whereby continuous magma supply causes eruptions from increasingly deeper and larger magma storage zones. Downward depressurization continues until unloading of the deepest, least differentiated magma triggers pulses in lava and gas flux, accompanied by rapid contraction of the volcano edifice, that empties the main shallow reservoir and terminates the cycle. Such an unloading process may characterize the evolution of shallow magmatic systems at other persistently active effusive centers.
Lingua originaleEnglish
pagine (da-a)-
Numero di pagine24
RivistaEarth and Planetary Science Letters
Volume463
Stato di pubblicazionePublished - 2017

Fingerprint

Volcanoes
volcanoes
lava
magma
volcano
Gases
Fluxes
volcanic eruptions
trends
volcanic eruption
Vents
Sea level
Unloading
deflation
unloading
Plumbing
inflation
gas
vents
sea level

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Geochemistry and Petrology

Cita questo

Shallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La Réunion Island). / Aiuppa, Alessandro; Vlastélic; Gurioli; Aiuppa; Peltier; Favalli; Coppola; Ferrazzini; Moune; Di Muro; Arellano; Villeneuve; Galle; Bachèlery; Harris.

In: Earth and Planetary Science Letters, Vol. 463, 2017, pag. -.

Risultato della ricerca: Article

Aiuppa, A, Vlastélic, Gurioli, Aiuppa, Peltier, Favalli, Coppola, Ferrazzini, Moune, Di Muro, Arellano, Villeneuve, Galle, Bachèlery & Harris 2017, 'Shallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La Réunion Island)', Earth and Planetary Science Letters, vol. 463, pagg. -.
Aiuppa, Alessandro ; Vlastélic ; Gurioli ; Aiuppa ; Peltier ; Favalli ; Coppola ; Ferrazzini ; Moune ; Di Muro ; Arellano ; Villeneuve ; Galle ; Bachèlery ; Harris. / Shallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La Réunion Island). In: Earth and Planetary Science Letters. 2017 ; Vol. 463. pagg. -.
@article{1be198906b7d40fa8c4962dbab10f933,
title = "Shallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La R{\'e}union Island)",
abstract = "Basaltic magma chambers are often characterized by emptying and refilling cycles that influence their evolution in space and time, and the associated eruptive activity. During April 2007, the largest historical eruption of Piton de la Fournaise ({\^I}le de La R{\'e}union, France) drained the shallow plumbing system () and resulted in collapse of the 1-km-wide summit crater. Following these major events, Piton de la Fournaise entered a seven-year long period of near-continuous deflation interrupted, in June 2014, by a new phase of significant inflation. By integrating multiple datasets (lava discharge rates, deformation, seismicity, gas flux, gas composition, and lava chemistry), we here show that the progressive migration of magma from a deeper (below sea level) storage zone gradually rejuvenated and pressurized the above-sea-level portion of the magmatic system consisting of a vertically-zoned network of relatively small-volume magma pockets. Continuous inflation provoked four small () eruptions from vents located close to the summit cone and culminated, during August–October 2015, with a chemically zoned eruption that erupted of lava. This two-month-long eruption evolved through (i) an initial phase of waning discharge, associated to the withdrawal of differentiated magma from the shallow system, into (ii) a month-long phase of increasing lava and SO2 fluxes at the effusive vent, coupled with CO2 enrichment of summit fumaroles, and involving emission of less differentiated lavas, to end with, (iii) three short-lived (∼2 day-long) pulses in lava and gas flux, coupled with arrival of cumulative olivine at the surface and deflation. The activity observed at Piton de la Fournaise in 2014 and 2015 points to a new model of shallow system rejuvenation and discharge, whereby continuous magma supply causes eruptions from increasingly deeper and larger magma storage zones. Downward depressurization continues until unloading of the deepest, least differentiated magma triggers pulses in lava and gas flux, accompanied by rapid contraction of the volcano edifice, that empties the main shallow reservoir and terminates the cycle. Such an unloading process may characterize the evolution of shallow magmatic systems at other persistently active effusive centers.",
keywords = "Piton de la Fournaise; shallow plumbing system; effusive trends; unloading; effusive paroxysm",
author = "Alessandro Aiuppa and Vlast{\'e}lic and Gurioli and Aiuppa and Peltier and Favalli and Coppola and Ferrazzini and Moune and {Di Muro} and Arellano and Villeneuve and Galle and Bach{\`e}lery and Harris",
year = "2017",
language = "English",
volume = "463",
pages = "--",
journal = "Earth and Planetary Science Letters",
issn = "0012-821X",
publisher = "Elsevier",

}

TY - JOUR

T1 - Shallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La Réunion Island)

AU - Aiuppa, Alessandro

AU - Vlastélic, null

AU - Gurioli, null

AU - Aiuppa, null

AU - Peltier, null

AU - Favalli, null

AU - Coppola, null

AU - Ferrazzini, null

AU - Moune, null

AU - Di Muro, null

AU - Arellano, null

AU - Villeneuve, null

AU - Galle, null

AU - Bachèlery, null

AU - Harris, null

PY - 2017

Y1 - 2017

N2 - Basaltic magma chambers are often characterized by emptying and refilling cycles that influence their evolution in space and time, and the associated eruptive activity. During April 2007, the largest historical eruption of Piton de la Fournaise (Île de La Réunion, France) drained the shallow plumbing system () and resulted in collapse of the 1-km-wide summit crater. Following these major events, Piton de la Fournaise entered a seven-year long period of near-continuous deflation interrupted, in June 2014, by a new phase of significant inflation. By integrating multiple datasets (lava discharge rates, deformation, seismicity, gas flux, gas composition, and lava chemistry), we here show that the progressive migration of magma from a deeper (below sea level) storage zone gradually rejuvenated and pressurized the above-sea-level portion of the magmatic system consisting of a vertically-zoned network of relatively small-volume magma pockets. Continuous inflation provoked four small () eruptions from vents located close to the summit cone and culminated, during August–October 2015, with a chemically zoned eruption that erupted of lava. This two-month-long eruption evolved through (i) an initial phase of waning discharge, associated to the withdrawal of differentiated magma from the shallow system, into (ii) a month-long phase of increasing lava and SO2 fluxes at the effusive vent, coupled with CO2 enrichment of summit fumaroles, and involving emission of less differentiated lavas, to end with, (iii) three short-lived (∼2 day-long) pulses in lava and gas flux, coupled with arrival of cumulative olivine at the surface and deflation. The activity observed at Piton de la Fournaise in 2014 and 2015 points to a new model of shallow system rejuvenation and discharge, whereby continuous magma supply causes eruptions from increasingly deeper and larger magma storage zones. Downward depressurization continues until unloading of the deepest, least differentiated magma triggers pulses in lava and gas flux, accompanied by rapid contraction of the volcano edifice, that empties the main shallow reservoir and terminates the cycle. Such an unloading process may characterize the evolution of shallow magmatic systems at other persistently active effusive centers.

AB - Basaltic magma chambers are often characterized by emptying and refilling cycles that influence their evolution in space and time, and the associated eruptive activity. During April 2007, the largest historical eruption of Piton de la Fournaise (Île de La Réunion, France) drained the shallow plumbing system () and resulted in collapse of the 1-km-wide summit crater. Following these major events, Piton de la Fournaise entered a seven-year long period of near-continuous deflation interrupted, in June 2014, by a new phase of significant inflation. By integrating multiple datasets (lava discharge rates, deformation, seismicity, gas flux, gas composition, and lava chemistry), we here show that the progressive migration of magma from a deeper (below sea level) storage zone gradually rejuvenated and pressurized the above-sea-level portion of the magmatic system consisting of a vertically-zoned network of relatively small-volume magma pockets. Continuous inflation provoked four small () eruptions from vents located close to the summit cone and culminated, during August–October 2015, with a chemically zoned eruption that erupted of lava. This two-month-long eruption evolved through (i) an initial phase of waning discharge, associated to the withdrawal of differentiated magma from the shallow system, into (ii) a month-long phase of increasing lava and SO2 fluxes at the effusive vent, coupled with CO2 enrichment of summit fumaroles, and involving emission of less differentiated lavas, to end with, (iii) three short-lived (∼2 day-long) pulses in lava and gas flux, coupled with arrival of cumulative olivine at the surface and deflation. The activity observed at Piton de la Fournaise in 2014 and 2015 points to a new model of shallow system rejuvenation and discharge, whereby continuous magma supply causes eruptions from increasingly deeper and larger magma storage zones. Downward depressurization continues until unloading of the deepest, least differentiated magma triggers pulses in lava and gas flux, accompanied by rapid contraction of the volcano edifice, that empties the main shallow reservoir and terminates the cycle. Such an unloading process may characterize the evolution of shallow magmatic systems at other persistently active effusive centers.

KW - Piton de la Fournaise; shallow plumbing system; effusive trends; unloading; effusive paroxysm

UR - http://hdl.handle.net/10447/226880

M3 - Article

VL - 463

SP - -

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

ER -