Chlorite, Biotite, Illite, Muscovite and Feldspar Dissolution Kinetics at Variable pH and Temperatures up to 280 deg C


Chemical reactions pose an important but poorly understood threat to EGS long-term success because of their impact on fracture permeability. This report summarizes the dissolution rate equations for layered silicates where data were lacking for geothermal systems. Here we report updated rate laws for chlorite (Carroll and Smith 2013), biotite (Carroll and Smith, 2015), illite (Carroll and Smith, 2014), and for muscovite. Also included is a spreadsheet with rate data and rate equations for use in reactive transport simulators.

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DOE Project Name: The Viability of Sustainable, Self-Propping Shear Zones in Enhanced Geothermal Systems: Measurement of Reaction Rates at Elevated Temperatures
DOE Project Number: FY14 AOP 1422
DOE Project Lead: Lauren Boyd
DOI: 10.15121/1441454
Last Updated: over a year ago
Data from February, 2017
Submitted Feb 24, 2017


Lawrence Livermore National Laboratory



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Susan Carroll
Lawrence Livermore National Laboratory
Megan M. Smith
Lawrence Livermore National Laboratory
Kristin Lammers
Lawrence Livermore National Laboratory


geothermal, energy, kinetic data, illite, muscovite, feldspar, chlorite, biotite, geochemistry, chemistry, fracture permeability, success, dissolution, rate equations, kinetics, egs, enhanced geothermal systems


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