Rare earth elements in Proterozoic metabasalts and associated volcanogenic sulphide ore from Haveri, southwestern Finland

[摘要] REE data on two tholeiitic metabasalts and a metalava breccia from the Haveri formation display a coherent distribution pattern from La 28 to Lu 7 times that of chondrite. Such contents and LREE enrichment have been observed in some tholeiitic basalts from marginal basins, Archean greenstone belts, and calc-alkaline basalts from island arcs. REE distribution in a submassive sulphide ore overlying metalava breccia is from La 6 to Lu 2 times that of chondrite. A positive Eu anomaly is recorded in both the epidotized metalava breccia and the genetically related sulphide ore. It is suggested that Eu could be used as a pathfinder in the exploration of volcanic exhalative ore deposits.