Abstract

by Dr. Sarah Lambart, Lamont-Doherty Earth Observatory, Columbia University, USA:

Carbonation of peridotite may be an important sink in the global carbon cycle and in some natural systems attain 100% carbonation. One way to achieve this may be via reaction-driven cracking that maintains or enhances permeability and reactive surface area. Without reaction-driven cracking, in situ mineral carbonation could fill pore space, limiting reaction progress and leaving much of the silicate unaltered. However, the conditions most favorable for reaction-driven cracking are poorly understood. In this talk, I will present the underlying thermodynamics of the process, discuss ongoing and proposed laboratory and field simulation and consider future prospects for large-scale CO₂ sequestration via fluid-rock interaction.

Coffee and cake as usual, all welcome!