EGU2020-10473, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-10473
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Rapid and intense CO2 emissions into the atmosphere: Examples from the end-Triassic extinction

Manfredo Capriolo1, Benjamin Mills2, Robert Newton2, Jacopo Dal Corso3, Alexander Dunhill2, and Andrea Marzoli1
Manfredo Capriolo et al.
  • 1Department of Geosciences, University of Padova, Padova, Italy
  • 2School of Earth and Environment, University of Leeds, Leeds, United Kingdom
  • 3State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China

The coincidence between mass extinction events and the emplacement of Large Igneous Provinces (LIPs) in the Phanerozoic geological record points to the magmatic CO2 degassing as the potential trigger of rapid global-scale climatic and environmental changes. The Central Atlantic Magmatic Province (CAMP) is one of the Earth’s hugest LIPs, and is coincident with the end-Triassic extinction, at ca. 201.5 Ma. Such LIPs emplacement and associated magmatic CO2 degassing have traditionally been interpreted as occurring over periods much longer than those of anthropogenic CO2 emissions, however our improving understanding of LIPs activity is reducing these timescales, with the latest estimates indicating CAMP magmatic pulses lasting approximately a few centuries each and characterized by high eruption rates [1; 2]. We employed a biogeochemical model to investigate the effects on ocean-atmosphere system and climate of these CAMP magmatic pulses, and to test whether such rapid and intense magmatic CO2 degassing is consistent with the climatic, geochemical and palaeontological record of the end-Triassic. Hence, we compared the modern anthropogenic emissions (since the Industrial Revolution) with the pulsed magmatic degassing during CAMP emplacement, in order to evaluate the impact of rapid and intense events on climate and environment changes.

 

[1] Knight et al. (2004), Earth Planet. Sci. Lett. 228, 143-160. [2] Marzoli et al. (2019), J. Petrol. 60, 945-996.

How to cite: Capriolo, M., Mills, B., Newton, R., Dal Corso, J., Dunhill, A., and Marzoli, A.: Rapid and intense CO2 emissions into the atmosphere: Examples from the end-Triassic extinction, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-10473, https://doi.org/10.5194/egusphere-egu2020-10473, 2020