MECHANISM OF CHLORINE DISSOLUTION IN WATER-SATURATED MODEL GRANODIORITE MELT: APPLICATIONS OF IR SPECTROSCOPIC METHODS

Abstract

The joint solubility of Cl and H2O was experimentally studied at P = 1 kbar and T = 1000°C in a model granodiorite melt interacting with water-salt fluid within a wide range of bulk fluid concentration, from 0 to 98 wt % of chlorides. The structure of granodiorite melts was characterized on the basis of the IR spectra of quenched glasses. Total water content and concentrations of various water species (H2Omo1 and OH-) were determined in the same glasses by the methods of near FTIR spectroscopy. The influence of variations in the concentrations of alkali and alkali earth cations, chlorine, and water on the structure of medium-range order in granodiorite glass was evaluated.