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BERGMAN, LEIF and LINDBERG, BO 1979: Phanerozoic veins of galena in the Aland rapakivi area, southwestern Finland. Bull. Geol. Soc. Finland 51, 55—62. Some minor galena mineralizations are in par t associated with clastic dykes of Cambrian sandstone in the Aland rapakivi area. Galena also occurs disseminated in greisen-type mineralizations. The difference in age between the two modes of occurrence is probably at least 1100 Ma. No traces of a magmatic source have been found, and hence, a magmatic-hydrothermal origin for the galena associated with sandstone dykes is unlikely. It is suggested that the lead-bearing solutions mobilized f rom the sediments and precipitated in fissures during compaction and diagenesis.

Phanerozoic veins of galena in the Åland rapakivi area, southwestern Finland