Fluid inclusions in metamorphic rocks of the Elat area

The microthermometric data on fluid inclusions in quartz in the Elat metamorphic complex (Southern Israel) revealed the following connection between fluid flow and metamorphism: 1) the nearly pure CO₂ inclusions are connected with the first wave of fluid flow during the main metamorphic event; 2) H₂O-CO₂ inclusions over- and undersaturated in salt represent a second wave of fluid flow during the main metamorphic event; 3) igneous intrusion of granite magma is a possible source of metamorphic heat and fluid; 4) the greater part of brine fluid inclusions were formed during the overprint by the upper greenschist-facies metamorphism and during meteoric water infiltration. The brine system is characterized by solutions of NaCl and KCl with concentrations up to 9 wt% NaCl eq. Using the data on primary CO₂ and/or H₂O-CO₂ inclusions, pressure ranges in good agreement with the garnet-sillimanite/andalusite-anorthite geobarometry were obtained. -from Author