Hydrothermal controls on the genesis of REE deposits: Insights from an in situ XAS study of Yb solubility and speciation in high temperature fluids (T<400?C)
High pressure-high temperature experiments are used to investigate the effect of temperature, pH and fluid composition on the transport and deposition of REE and provide constraints on the role of hydrothermal fluids in the formation of rare metal deposits. In situ X-ray absorption (XAS) measurements were conducted at 50 MPa to determine simultaneously the solubility of Yb compounds (Yb2O3, Yb2Si2O7 and YbPO4) and Yb speciation from 200 to 350–400 °C in fluids involving Cl, F and P ligands. Yb...[Show more]
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