Rare earth elements (REE) were determined for 57 samples representative of the range of stratigraphic units, both mineralized and unmineralized, associated with the high-grade polymetallic volcanogenic sulphide deposits at Buchans, Newfoundland. These data do not indicate any features indicative of magmatic fractionation processes, e.g., enrichment of total REE or any europium depletion anomaly, in the mineralized relative to the unmineralized volcanics, suggesting that such processes did not play an important role in the formation of these ore deposits. These results also emphasize the need for caution in any attempts to use the rare earth elements as a general tool for discrimination between barren and mineralized volcanic sequences.

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