GEOCHEMISTRY AND HIGH-PRECISION GEOCHRONOLOGY OF THE MASS TRANSFER BETWEEN A SKARN AND SAPPHIRE METAPELITE WITHIN THE WHITEHORN STOCK MAGMATIC-HYDROTHERMAL SYSTEM, COLORADO: A MODEL FOR HYDROTHERMAL CORUNDUM
This study examines the metapelite-hosted hydrothermal corundum occurrence at the sheared contact of a syngenetic skarn and related magmatic-hydrothermal evolution of the Laramide calc-alkaline I-type Whitehorn Stock in central Colorado. Prior researchers have suggested that leaching away quartz within quartz-bearing protoliths will enhance residual Al2O3 so that corundum can be stabilized. This study demonstrates, using field relations, microscopy, whole-rock analysis, electron microprobe analysis (EPMA), and laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS), that Al ...
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