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Basalts and ultramafic rocks from Hole 332B and Site 334 of DSDP Leg 37 have been analyzed for palladium, iridium, and gold by neutron activation. Platinum was run on all samples, but reliable values were obtained only on ultramafic rocks. The suite included one sample from each lithological unit of the two holes together with a group of 14 samples from Unit 3 of Hole 332B. The main objective of the study was to characterize ocean-floor basalts with respect to average noble metal content and to compare these rocks with mid-ocean island basalts and basalts dredged from the sea floor. Other aims were to evaluate noble metal variability in an individual basaltic unit and to compare noble metal levels in basalts and possibly related ultramafics.

Determination of Palladium, Iridium, and Gold in Mafic and Ultramafic Rocks Drilled from the Mid-Atlantic Ridge, DSDP Leg 37