Investigation of the H2O-NaCl-LiCl System: A Synthetic Fluid Inclusion Study and Thermodynamic Modeling from -50 to +100 C and up to 12 mol/kg

• DOI: 10.2113/gsecongeo.105.2.329
• Publication Date: 2010-05-17T15:43:27Z
• Authors: M. Dubois; C. Monnin; T. Castelain; Y. Coquinot; S. Gouy; A. Gauthier; B. Goffe
• Keywords: Mole

Lithium can reach high concentrations in some geological environments, such as rare element pegmatites, continental brines, and hydrothermal systems. The H 2 O-NaCl-LiCl system was investigated a model for fluid inclusion studies lithium-rich fluids. We first compiled experimental data (freezing point depression measurements halite solubility data). Synthetic inclusions were then prepared quartz crystals, order to obtain new observe phase transitions characterized by the presence of numerous hydrates. combination Raman microspectrometry microthermometry leads identify undoubtedly transition succession. revealed partial crystallization metastable transitions. A spectrum LiCl pentahydrate, stable melting at eutectic, is presented. Pitzer used calculate using published expressions activity coefficients O-NaCl O-LiCl finally propose representation diagram interpretation Li-rich chloride-dominated range −50° +100°C.