E3S Web Conf.
Volume 98, 201916th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference)
|Number of page(s)||4|
|Section||Geological Evolution of Water-Rock System: Mechanisms, Processes, Factors, Stages. The Session Dedicated to Stepan Shvartsev’s Memory|
|Published online||07 June 2019|
Escape of Supercritical-CO2 Fluids Trapped in Calcite Nano-metric Pores
Sorbonne Université, CNRS, METIS, 4 place Jussieu, 75005 Paris, France
2 GET, Université de Toulouse, CNRS, IRD, CNES, France
3 Statoil, Trondheim, Norway
4 Department of Chemistry and Earth Sciences, University of Cagliari, Italy
5 DISTEM, University of Palermo, Palermo, Italy
* Corresponding author: firstname.lastname@example.org
Flow of supercritical CO2-bearing fluids through a rock is a fundamental phenomenon which acts upon a great many geological processes ranging from seismic activity to formation of ore deposits. Atomic Force Microscopy scanning experiments allowed us to infer movement of supercritical CO2-bearing fluids through calcite crystals and relate it to natural decrepitation of nanoscale fluid inclusions. Calculated velocities exceed the rate of diffusion predicated via current vacancy models by several orders of magnitude implying that CO2-rich fluid movement through micro and nano-pore space may presently be greatly underestimated.
© The Authors, published by EDP Sciences, 2019
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