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New geochemical data from the Villa de Cura blueschist belt indicate that it is a subducted (and exhumed) oceanic island-arc terrane. The majority of the metabasalts were oceanic island-arc tholeiites (7–23 wt% MgO), though more evolved tholeiites are also found. Rare earth element (REE) and immobile trace element data from the Villa de Cura belt exhibit island-arc signatures, including (1) flat to light enriched REE patterns, and (2) enrichment of large ion lithophile elements relative to high field strength elements with a strongly negative Nb anomaly. Thus, the Villa de Cura belt is similar to other Albian-Aptian age oceanic island-arc...

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