Hydrothermal solubility of monazite rare earth element endmembers , The
Monazite-(Ce), a light rare earth element (REE) phosphate, occurs as an accessory mineral in metamorphic, igneous, and sedimentary environments, and is a common ore mineral in hydrothermal REE deposits. The chemical composition of monazite has proven useful as a geochronometer and geothermometer, but currently there is no model describing the compositional variations of REE in monazite resulting from interactions with hydrothermal fluids. To develop such a model requires quantification of the chemical properties of the aqueous REE species and the solid solution properties of the mineral phase. ...
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