19–22 May 2025
US/Mountain timezone

Rock microfluidics under pressure: enabling geochemical observations at subsurface conditions

22 May 2025, 09:05
15m
Oral Presentation (MS11) Microfluidics and nanofluidics in porous systems MS11

Speaker

Wen Song (University of Texas at Austin)

Description

Real-rock microfluidics have enabled elucidation of in situ fluid-rock interactions at the fundamental scales of length and time (~ μm, ms). These platforms are categorized broadly into three classes: those constructed from rock material (e.g., calcite, shale) that are pressure-constrained by the mechanics of the crystal substrate, those deposited with mineral particulates (e.g., kaolinite, brucite, etc.) that lack spatial control and realism, and those precipitated with minerals in situ that are limited to systems with fast reaction kinetics. Microscale resolution of geochemical interactions in decarbonization-critical lithologies such as basalts at realistic subsurface conditions, as a result, remain inaccessible. In this talk, I will show a new platform that enables, for the first time, the direct observation of geochemical interactions within natural mafic matrices at elevated pressures and temperatures representative of subsurface environments. Interfacial reactions are characterized for mono- and di-mineralic systems to understand the nonlinear influence of secondary species on overall reaction kinetics.

Country United States
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Primary author

Wen Song (University of Texas at Austin)

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