Carbon release from Large Igneous Province magmas estimated from trace element-gas correlations

TY - JOUR

T1 - Carbon release from Large Igneous Province magmas estimated from trace element-gas correlations

AU - Black, Benjamin A.

AU - Aiuppa, Alessandro

N1 - Funding Information: BAB acknowledges funding support from NSF grant EAR 2238441, the Deep Carbon Observatory, and the Alfred P. Sloan Foundation. AA acknowledges funding support from the Deep Carbon Observatory and from Ministero Istruzione Università e Ricerca (Miur, Grant N. 2017LMN-LAW). BAB acknowledges Lindy Elkins-Tanton, Seth Burgess, Roma Veselovskiy, and Volodia Pavlov for stimulating discus- sions and for their assistance with collecting Siberian Traps alkaline rocks. Publisher Copyright: © The Author(s) 2023.

PY - 2023

Y1 - 2023

N2 - Large Igneous Provinces (LIPs) facilitate massive transfers of CO2 and other volatiles from the mantle to atmosphere, contributing to past global warming and environmental disruption. However, the scale and evolution of magmatic CO2 fluxes during these events remain uncertain due to the tendency of CO2 to degas deep in magmatic systems. Here we estimate LIP CO2 using an approach based on an observed correlation between gas CO2/S ratios and trace elements in volcanic rocks. We apply this method to a compilation of published geochemical data for tholeiitic LIP lavas and to a new major and trace element dataset for alkaline rocks from the Siberian Traps. Our results indicate that CO2/S and therefore CO2 in tholeiitic and alkaline magma suites from LIPs span 1ś2 orders of magnitude, emphasizing that changing CO2 concentrations can combine with magma flux to drive strong variations in CO2 release through the evolution of LIP magmatism.

AB - Large Igneous Provinces (LIPs) facilitate massive transfers of CO2 and other volatiles from the mantle to atmosphere, contributing to past global warming and environmental disruption. However, the scale and evolution of magmatic CO2 fluxes during these events remain uncertain due to the tendency of CO2 to degas deep in magmatic systems. Here we estimate LIP CO2 using an approach based on an observed correlation between gas CO2/S ratios and trace elements in volcanic rocks. We apply this method to a compilation of published geochemical data for tholeiitic LIP lavas and to a new major and trace element dataset for alkaline rocks from the Siberian Traps. Our results indicate that CO2/S and therefore CO2 in tholeiitic and alkaline magma suites from LIPs span 1ś2 orders of magnitude, emphasizing that changing CO2 concentrations can combine with magma flux to drive strong variations in CO2 release through the evolution of LIP magmatism.

KW - CO2 release

KW - Large igneous provinces

KW - Trace element geochemistry

KW - Volatile outgassing

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U2 - https://doi.org/10.30909/vol.06.01.129145

DO - https://doi.org/10.30909/vol.06.01.129145

M3 - Article

SN - 2610-3540

VL - 6

SP - 129

EP - 145

JO - Volcanica

JF - Volcanica

IS - 1

ER -