REE fractionation between scheelite and apatite in hydrothermal conditions

The geochemical analysis of the REE hydrothermal apatite and scheelite pairs from various types of W ore deposits (skarns, disseminated scheelite, and quartz veins) provides an insight into REE partitioning between the two minerals. Among the 18 analysed pairs, only five appear to have grown in equi...

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Bibliographic Details
Published in:The American mineralogist 1993-12, Vol.78 (11-12), p.1275-1285
Main Authors: Raimbault, Louis, Baumer, Alain, Dubru, Michel, Benkerrou, Constance, Croze, Véronique, Zahm, Alain
Format: Article
Language:English
Subjects:
apatite
chemical fractionation
Chemistry
Fractionation
Geochemistry
hydrothermal conditions
metals
mineralization
Mineralogy
Minerals
nonsilicates
phase equilibria
phosphates
rare earths
rock, sediment, soil
scheelite
tungstates
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Summary:The geochemical analysis of the REE hydrothermal apatite and scheelite pairs from various types of W ore deposits (skarns, disseminated scheelite, and quartz veins) provides an insight into REE partitioning between the two minerals. Among the 18 analysed pairs, only five appear to have grown in equilibrium conditions. Ten other pairs show more or less important departures from equilibrium. The remaining apatite and scheelite pairs have quite different REE patterns, indicating crystallization from different fluids.
ISSN:0003-004X
1945-3027