Quantification of the pre-eruptive CO2 budget of Neo-Tethyan magmas and their forcing on Early Cenozoic global climate
- 1Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy (leaemma.ostorero@unimib.it)
- 2Université de Lorraine, CNRS, CRPG, F-54000 Nancy, France
- 3Department of Geosciences, University of Arizona, Tucson, USA
- 4Dipartimento di Scienze della Terra, Università degli Studi di Milano, via Mangiagalli 34, 20133 Milano, Italy
- 5Department of Science, Roma Tre University, Roma, Italy
- 6State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
- 7China University of Geosciences, Beijing, China
Magmatic CO2 emissions can affect the atmosphere composition, thereby driving long term global climate changes. Early Cenozoic climate trends are generally associated with changes in global silicate weathering related to the India-Asia convergence and collision, whereas changes in degassing from Neo-Tethyan magmatic arcs and their likely climatic effects are largely dismissed. Here, we characterize the petrography and measure the volatile content (e.g. CO2, H2O, F, Cl and S) of glassy, bubble-bearing and reheated melt inclusions within quartz, feldspar and pyroxene crystals from Early Cenozoic basalts, andesites and rhyolites from Ladakh (India), Tibet and Iran. Integrating our unprecedented measurements with modeling of the Neo-Tethyan geodynamics, we quantitatively assess the history of magmatic emissions from the Neo-Tethyan arcs and their contribution to Early Cenozoic climate changes. Assessing the Neo-Tethyan magmatic forcing of Early Cenozoic climate has major implications for our understanding of global volatile cycling on geological timescales.
How to cite: Ostorero, L., Sternai, P., Esposito, R., Bouilhol, P., Müller, V., Malaspina, N., Tumiati, S., Ballato, P., Zhang, Z., Ji, W.-Q., Dai, J., and Frezzotti, M. L.: Quantification of the pre-eruptive CO2 budget of Neo-Tethyan magmas and their forcing on Early Cenozoic global climate, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-777, https://doi.org/10.5194/egusphere-egu24-777, 2024.
