Patterns of platinum-group elements in mantle peridotite, granulite xenoliths and basalt in Hannuoba

Neutron activation analysis after preconcentration of nickel sulfide fire a ssay was used in measurement of Ru, Ph, Pd, Os, Ir, Pt (i.e. PGE elements) and Au concentrations for basalt, mantle and granulite xenoliths in Hannuob a. The chondrite- and primitive mantle-normalized PGE patterns generally ex hibit flat (for Iherzolite), negative slope (for harzburgite), and positive slope (for basic granulite and basalt). In addition, strong it negative an omaly occurs in basalt and granulite xenolith, and little negative anomaly also exists in Iherzolite xenolith in Hannuoba.