Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica

Alessandro Aiuppa, Aiuppa, Clive Oppenheimer, Carlos Ramírez, Giudice, Peters, Moussallam

Risultato della ricerca: Article

7 Citazioni (Scopus)

Abstract

The equilibrium composition of volcanic gases with their magma is often overprinted by interaction with a shallow hydrothermal system. Identifying the magmatic signature of volcanic gases is critical to relate their composition to properties of the magma (temperature, fO2, gas-melt segregation depth). We report measurements of the chemical composition and flux of the major gas species emitted from Turrialba Volcano during March 2013. Measurements were made of two vents in the summit region, one of which opened in 2010 and the other in 2012. We determined an average SO2 flux of 5.2 ± 1.9 kgs-1 using scanning ultraviolet spectroscopy, and molar proportions of H2O, CO2, SO2, HCl, CO and H2 gases of 94.16, 4.03, 1.56, 0.23, 0.003 and 0.009% respectively by open-path Fourier transform infrared (FTIR) spectrometry and a multi-species gas-sensing system. Together, these data imply fluxes of 88, 8, 0.44, 5 × 10-3 and 1 × 10-3 kgs-1 for H2O, CO2, HCl, CO and H2 respectively. Although H2S was detected, its concentration could not be resolved. HF was not detected. The chemical signature of the gas from both vents was found to be broadly similar. Following the opening of the 2010 and 2012 vents we found limited to negligible interaction of the magmatic gas with the hydrothermal system has occurred and the gas composition of the volcanic plume is broadly representative of equilibrium with the magma. The time evolution of the gas composition, the continuous emission of large quantities of SO2, and the physical evolution of the summit area with new vent openings and more frequent eruptions all point towards a continuous drying of the hydrothermal system at Turrialba's summit at an apparently increasing rate.
Lingua originaleEnglish
pagine (da-a)1341-1350
Numero di pagine10
RivistaSolid Earth
Volume5
Stato di pubblicazionePublished - 2014

Fingerprint

Costa Rica
gas emissions
Volcanoes
volcanoes
Gas emissions
volcano
Gases
signatures
gases
vents
Vents
hydrothermal systems
gas
Volcanic Eruptions
magma
hydrothermal system
volcanology
gas composition
sulfur dioxide
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Palaeontology
  • Stratigraphy
  • Earth-Surface Processes
  • Geochemistry and Petrology
  • Geology
  • Geophysics

Cita questo

Aiuppa, A., Aiuppa, Oppenheimer, C., Ramírez, C., Giudice, Peters, & Moussallam (2014). Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica. Solid Earth, 5, 1341-1350.

Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica. / Aiuppa, Alessandro; Aiuppa; Oppenheimer, Clive; Ramírez, Carlos; Giudice; Peters; Moussallam.

In: Solid Earth, Vol. 5, 2014, pag. 1341-1350.

Risultato della ricerca: Article

Aiuppa, A, Aiuppa, Oppenheimer, C, Ramírez, C, Giudice, Peters & Moussallam 2014, 'Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica', Solid Earth, vol. 5, pagg. 1341-1350.
Aiuppa A, Aiuppa, Oppenheimer C, Ramírez C, Giudice, Peters e altri. Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica. Solid Earth. 2014;5:1341-1350.
Aiuppa, Alessandro ; Aiuppa ; Oppenheimer, Clive ; Ramírez, Carlos ; Giudice ; Peters ; Moussallam. / Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica. In: Solid Earth. 2014 ; Vol. 5. pagg. 1341-1350.
@article{8346f385cce04ade91541b3a8b1a044c,
title = "Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica",
abstract = "The equilibrium composition of volcanic gases with their magma is often overprinted by interaction with a shallow hydrothermal system. Identifying the magmatic signature of volcanic gases is critical to relate their composition to properties of the magma (temperature, fO2, gas-melt segregation depth). We report measurements of the chemical composition and flux of the major gas species emitted from Turrialba Volcano during March 2013. Measurements were made of two vents in the summit region, one of which opened in 2010 and the other in 2012. We determined an average SO2 flux of 5.2 ± 1.9 kgs-1 using scanning ultraviolet spectroscopy, and molar proportions of H2O, CO2, SO2, HCl, CO and H2 gases of 94.16, 4.03, 1.56, 0.23, 0.003 and 0.009{\%} respectively by open-path Fourier transform infrared (FTIR) spectrometry and a multi-species gas-sensing system. Together, these data imply fluxes of 88, 8, 0.44, 5 × 10-3 and 1 × 10-3 kgs-1 for H2O, CO2, HCl, CO and H2 respectively. Although H2S was detected, its concentration could not be resolved. HF was not detected. The chemical signature of the gas from both vents was found to be broadly similar. Following the opening of the 2010 and 2012 vents we found limited to negligible interaction of the magmatic gas with the hydrothermal system has occurred and the gas composition of the volcanic plume is broadly representative of equilibrium with the magma. The time evolution of the gas composition, the continuous emission of large quantities of SO2, and the physical evolution of the summit area with new vent openings and more frequent eruptions all point towards a continuous drying of the hydrothermal system at Turrialba's summit at an apparently increasing rate.",
author = "Alessandro Aiuppa and Aiuppa and Clive Oppenheimer and Carlos Ram{\'i}rez and Giudice and Peters and Moussallam",
year = "2014",
language = "English",
volume = "5",
pages = "1341--1350",
journal = "Solid Earth",
issn = "1869-9510",
publisher = "Copernicus Gesellschaft mbH",

}

TY - JOUR

T1 - Characterisation of the magmatic signature in gas emissions from Turrialba Volcano, Costa Rica

AU - Aiuppa, Alessandro

AU - Aiuppa, null

AU - Oppenheimer, Clive

AU - Ramírez, Carlos

AU - Giudice, null

AU - Peters, null

AU - Moussallam, null

PY - 2014

Y1 - 2014

N2 - The equilibrium composition of volcanic gases with their magma is often overprinted by interaction with a shallow hydrothermal system. Identifying the magmatic signature of volcanic gases is critical to relate their composition to properties of the magma (temperature, fO2, gas-melt segregation depth). We report measurements of the chemical composition and flux of the major gas species emitted from Turrialba Volcano during March 2013. Measurements were made of two vents in the summit region, one of which opened in 2010 and the other in 2012. We determined an average SO2 flux of 5.2 ± 1.9 kgs-1 using scanning ultraviolet spectroscopy, and molar proportions of H2O, CO2, SO2, HCl, CO and H2 gases of 94.16, 4.03, 1.56, 0.23, 0.003 and 0.009% respectively by open-path Fourier transform infrared (FTIR) spectrometry and a multi-species gas-sensing system. Together, these data imply fluxes of 88, 8, 0.44, 5 × 10-3 and 1 × 10-3 kgs-1 for H2O, CO2, HCl, CO and H2 respectively. Although H2S was detected, its concentration could not be resolved. HF was not detected. The chemical signature of the gas from both vents was found to be broadly similar. Following the opening of the 2010 and 2012 vents we found limited to negligible interaction of the magmatic gas with the hydrothermal system has occurred and the gas composition of the volcanic plume is broadly representative of equilibrium with the magma. The time evolution of the gas composition, the continuous emission of large quantities of SO2, and the physical evolution of the summit area with new vent openings and more frequent eruptions all point towards a continuous drying of the hydrothermal system at Turrialba's summit at an apparently increasing rate.

AB - The equilibrium composition of volcanic gases with their magma is often overprinted by interaction with a shallow hydrothermal system. Identifying the magmatic signature of volcanic gases is critical to relate their composition to properties of the magma (temperature, fO2, gas-melt segregation depth). We report measurements of the chemical composition and flux of the major gas species emitted from Turrialba Volcano during March 2013. Measurements were made of two vents in the summit region, one of which opened in 2010 and the other in 2012. We determined an average SO2 flux of 5.2 ± 1.9 kgs-1 using scanning ultraviolet spectroscopy, and molar proportions of H2O, CO2, SO2, HCl, CO and H2 gases of 94.16, 4.03, 1.56, 0.23, 0.003 and 0.009% respectively by open-path Fourier transform infrared (FTIR) spectrometry and a multi-species gas-sensing system. Together, these data imply fluxes of 88, 8, 0.44, 5 × 10-3 and 1 × 10-3 kgs-1 for H2O, CO2, HCl, CO and H2 respectively. Although H2S was detected, its concentration could not be resolved. HF was not detected. The chemical signature of the gas from both vents was found to be broadly similar. Following the opening of the 2010 and 2012 vents we found limited to negligible interaction of the magmatic gas with the hydrothermal system has occurred and the gas composition of the volcanic plume is broadly representative of equilibrium with the magma. The time evolution of the gas composition, the continuous emission of large quantities of SO2, and the physical evolution of the summit area with new vent openings and more frequent eruptions all point towards a continuous drying of the hydrothermal system at Turrialba's summit at an apparently increasing rate.

UR - http://hdl.handle.net/10447/104577

M3 - Article

VL - 5

SP - 1341

EP - 1350

JO - Solid Earth

JF - Solid Earth

SN - 1869-9510

ER -