Guillaume Georgeais

Postdoctoral Research Scientist, Geochemistry, Lamont-Doherty Earth Observatory (LDEO), Columbia Climate School
Comer 207 61 Route 9W Lamont-Doherty Earth Observatory Palisades, NY 10964 USA

BIOGRAPHY:

My current work is based on natural and experimental studies with a twist of numerical modeling on top. My research involves a mix of melt inclusions, embayments and crystals composition, and pyroclasts texture. The main goals are :

(1) to investigate how the surfacic physical processes (eruption size) are affected by the deep chemical parameters, (2) to reconcile the range of magma ascent rate estimated from the various geophysical or geochemical methods and (3) to better constrain volatile diffusion processes and their rates.

PUBLICATIONS

2025

Moussallam Y., Koga K.T., Rose-Koga E.F., Aubaud C., Lee H.J., Georgeais .G., “The carbon isotopic signature of the upper mantle is heterogeneous” Nature Communications Earth & Environment

2024

Georgeais G., Harris A., Moussallam Y., Rose-Koga E.F., Koga K.T., “An empirical relation between velocity, mass discharge rate and vent area for normal through paroxysmal eruptions at Stromboli”. Bulletin of Volcanology, DOI: 10.1007/s00445-024-01718-8

Moussallam, Y., Rose‐Koga, E. F., Tobias, P.F., Georgeais, G., Lee, H.J., Birnbaum, J., Pfeffer, M.A., Barnie, T., Regis, E., Kinetic Isotopic Degassing of CO2 During the 2021 Fagradalsfjall Eruption and the δ13C Signature of the Icelandic Mantle, Geochemistry geophysics geosystems

Robidoux, P., Moussallam, Y., Rose‐Koga, E. F., Rizzo, A.L., Georgeais, G., Lages, J., Levresse, G., Ferrando, S., Aiuppa, A., “New insights from plumbing system below composite mafic volcanoes: Post-glacial volatile contents and magmatic fluids from Villarrica magmas”. Lithos

2023

Moussallam, Y., Georgeais, G., Rose‐Koga, E. F., Koga, K. T., Hartley, M. E., Scaillet, B & Peters, N. (2023). CO2‐Undersaturated Melt Inclusions From the South West Indian Ridge Record Surprisingly Uniform Redox Conditions. Geochemistry geophysics geosystems, DOI: 10.1029/2023GC011235

2021

Georgeais G., Moussallam Y., Rose-Koga E. Magma decompression rate calculations with EMBER: A user‐friendly software to model diffusion of H2O, CO2 and S in melt embayments. Geochemistry geophysics geosystems, DOI:10.1029/2020GC009542

Moussallam Y., Médard E., Georgeais G., Rose-Koga E., Gurioli L., Pelletier B., Bani P., Grandin R., Boichu M., Shreve T.L., Tari D., Peters N. How to turn off a lava lake? A petrological investigation of the 2018 intra-caldera and submarine eruptions of Ambrym volcano. Bulletin of Volcanology vol. Special volume, DOI:10.1007/s00445-021-01455-2.

Staff and Affiliates Directory

Guillaume Georgeais

PUBLICATIONS