Deep CO2 in the end-Triassic Central Atlantic Magmatic Province

Abstract Large Igneous Province eruptions coincide with many major Phanerozoic mass extinctions, suggesting a cause-effect relationship where volcanic degassing triggers global climatic changes. In order to fully understand this relationship, it is necessary to constrain the quantity and type of deg...

Full description

Bibliographic Details
Published in:Nature Communications
Main Authors: Capriolo, Manfredo, Marzoli, Andrea, Aradi, László E., Callegaro, Sara, Dal Corso, Jacopo, Newton, Robert J., Mills, Benjamin J. W., Wignall, Paul B., Bartoli, Omar, Baker, Don R., Youbi, Nasrrddine, Remusat, Laurent, Spiess, Richard, Szabó, Csaba
Format: Article in Journal/Newspaper
Language:English
Published: Springer Science and Business Media LLC 2020
Subjects:
General Physics and Astronomy
General Biochemistry, Genetics and Molecular Biology
General Chemistry
Ocean acidification
Online Access:http://dx.doi.org/10.1038/s41467-020-15325-6
http://www.nature.com/articles/s41467-020-15325-6.pdf
http://www.nature.com/articles/s41467-020-15325-6
Description
Summary:Abstract Large Igneous Province eruptions coincide with many major Phanerozoic mass extinctions, suggesting a cause-effect relationship where volcanic degassing triggers global climatic changes. In order to fully understand this relationship, it is necessary to constrain the quantity and type of degassed magmatic volatiles, and to determine the depth of their source and the timing of eruption. Here we present direct evidence of abundant CO 2 in basaltic rocks from the end-Triassic Central Atlantic Magmatic Province (CAMP), through investigation of gas exsolution bubbles preserved by melt inclusions. Our results indicate abundance of CO 2 and a mantle and/or lower-middle crustal origin for at least part of the degassed carbon. The presence of deep carbon is a key control on the emplacement mode of CAMP magmas, favouring rapid eruption pulses (a few centuries each). Our estimates suggest that the amount of CO 2 that each CAMP magmatic pulse injected into the end-Triassic atmosphere is comparable to the amount of anthropogenic emissions projected for the 21 st century. Such large volumes of volcanic CO 2 likely contributed to end-Triassic global warming and ocean acidification.

Similar Items