TY - JOUR
T1 - Volcanic gas emissions and degassing dynamics at Ubinas and Sabancaya volcanoes; implications for the volatile budget of the central volcanic zone
AU - Aiuppa, Alessandro
AU - Bani, Philipson
AU - Tamburello, Giancarlo
AU - Giudice, Gaetano
AU - Boichu, Marie
AU - Schipper, C. Ian
AU - Peters, Nial
AU - Barnie, Talfan
AU - Moussallam, Manuel
AU - Curtis, Aaron
AU - Moussallam, Yves
AU - Masias, Pablo
AU - Bauduin, Sophie
AU - Apaza, Fredy
AU - Aiuppa, Alessandro
PY - 2017
Y1 - 2017
N2 - Emission of volcanic gas is thought to be the dominant process by which volatiles transit from the deep earth to the atmosphere. Volcanic gas emissions, remain poorly constrained, and volcanoes of Peru are entirely absent from the current global dataset. In Peru, Sabancaya and Ubinas volcanoes are by far the largest sources of volcanic gas. Here, we report the first measurements of the compositions and fluxes of volcanic gases emitted from these volcanoes. The measurements were acquired in November 2015. We determined an average SO2flux of 15.3 ± 2.3 kg sâ 1(1325-ton dayâ 1) at Sabancaya and of 11.4 ± 3.9 kg sâ 1(988-ton dayâ 1) at Ubinas using scanning ultraviolet spectroscopy and dual UV camera systems. In-situ Multi-GAS analyses yield molar proportions of H2O, CO2, SO2, H2S and H2gases of 73, 15, 10 1.15 and 0.15 mol% at Sabancaya and of 96, 2.2, 1.2 and 0.05 mol% for H2O, CO2, SO2and H2S at Ubinas. Together, these data imply cumulative fluxes for both volcanoes of 282, 30, 27, 1.2 and 0.01 kg sâ 1of H2O, CO2, SO2, H2S and H2respectively. Sabancaya and Ubinas volcanoes together contribute about 60% of the total CO2emissions from the Central Volcanic zone, and dominate by far the total revised volatile budget of the entire Central Volcanic Zone of the Andes.
AB - Emission of volcanic gas is thought to be the dominant process by which volatiles transit from the deep earth to the atmosphere. Volcanic gas emissions, remain poorly constrained, and volcanoes of Peru are entirely absent from the current global dataset. In Peru, Sabancaya and Ubinas volcanoes are by far the largest sources of volcanic gas. Here, we report the first measurements of the compositions and fluxes of volcanic gases emitted from these volcanoes. The measurements were acquired in November 2015. We determined an average SO2flux of 15.3 ± 2.3 kg sâ 1(1325-ton dayâ 1) at Sabancaya and of 11.4 ± 3.9 kg sâ 1(988-ton dayâ 1) at Ubinas using scanning ultraviolet spectroscopy and dual UV camera systems. In-situ Multi-GAS analyses yield molar proportions of H2O, CO2, SO2, H2S and H2gases of 73, 15, 10 1.15 and 0.15 mol% at Sabancaya and of 96, 2.2, 1.2 and 0.05 mol% for H2O, CO2, SO2and H2S at Ubinas. Together, these data imply cumulative fluxes for both volcanoes of 282, 30, 27, 1.2 and 0.01 kg sâ 1of H2O, CO2, SO2, H2S and H2respectively. Sabancaya and Ubinas volcanoes together contribute about 60% of the total CO2emissions from the Central Volcanic zone, and dominate by far the total revised volatile budget of the entire Central Volcanic Zone of the Andes.
KW - Carbon dioxide
KW - DOAS
KW - Geochemistry and Petrology
KW - Geophysics
KW - IASI
KW - Multi-GAS
KW - Sabancaya
KW - Trail By Fire
KW - UV-camera
KW - Ubinas
KW - Volcanic degassing
KW - Carbon dioxide
KW - DOAS
KW - Geochemistry and Petrology
KW - Geophysics
KW - IASI
KW - Multi-GAS
KW - Sabancaya
KW - Trail By Fire
KW - UV-camera
KW - Ubinas
KW - Volcanic degassing
UR - http://hdl.handle.net/10447/251149
UR - http://www.sciencedirect.com/science/journal/03770273
M3 - Article
VL - 343
SP - 181
EP - 191
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
SN - 0377-0273
ER -