EXPERIMENTAL INVESTIGATION OF THE DISSOLUTION OF QUARTZ BY A MUSCOVITE MICA SURFACE: IMPLICATIONS FOR PRESSURE SOLUTION

Abstract

Using the surface forces apparatus, which can measure small changes in thickness occuring even at essentially geological timescales, we have measured dissolution of quartz sheets when pressed against muscovite mica surfaces in aqueous electrolyte solution, but no dissolution is observed under dry conditions. It is postulated that the dissolved quartz may reprecipitate outside the contact junction as a fragile silica gel, which could be the main factor limiting the rate of further dissolution. Copyright 2006 by the American Geophysical Union.