AN UNUSUAL OCCURRENCE OF SYNCHYSITE-(Ce) IN AMYGDULES FROM THE ESTEREL VOLCANIC ROCKS, FRANCE: IMPLICATIONS FOR RARE-EARTH ELEMENT MOBILITY - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles The Canadian Mineralogist Year : 2015

AN UNUSUAL OCCURRENCE OF SYNCHYSITE-(Ce) IN AMYGDULES FROM THE ESTEREL VOLCANIC ROCKS, FRANCE: IMPLICATIONS FOR RARE-EARTH ELEMENT MOBILITY

Abstract

Certain basaltic flows of the Permian volcanism in the Esterel (France) are enriched at their top and bottom in amygdules containing various minerals. Some of these amygdules appear to be particularly enriched in synchysite-(Ce), developed as fibrous aggregates together with chlorite and calcite. The rare earth element (REE) distribution pattern in individual amygdules appears very similar to that of the host basalt, suggesting that during the basalt's late hydrothermal evolution the REE were coherently remobilized and reprecipitated in the amygdules in the form of REE minerals. In such an environment, enriched in carbonate and F, the most stable REE mineral to crystallize from the hydrothermal solution was synchysite-(Ce), whose REE pattern has strong similarities to the host basalt.
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hal-03670649 , version 1 (17-05-2022)

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Thierry Augé, Laurent Bailly, Guillaume Wille. AN UNUSUAL OCCURRENCE OF SYNCHYSITE-(Ce) IN AMYGDULES FROM THE ESTEREL VOLCANIC ROCKS, FRANCE: IMPLICATIONS FOR RARE-EARTH ELEMENT MOBILITY. The Canadian Mineralogist, 2015, 52 (5), pp.837-856. ⟨10.3749/canmin.1400012⟩. ⟨hal-03670649⟩

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