简介：Primitivemantle-normalizedPlatinum-groupelements(PGE)concentrationpatternsfortheZhengziyanwointrusionandDashibaoFormationbasaltsareofpositiveslope,similartomostoftheworld-classmagmaticNi-Cu-PGEsulfidedeposits.CharactersofthisintrusionanditsrelatedoresandDashibaoFormationbasaltsaretheirnegativePt-anomalyandhighconcentrationofRhrelativetoPtandPd,factsbeinginterpretedtobetheresultsofcrystallizationandfractionationofPt-alloysandspinelphase-freecrystallizationhistoryforthemagma,respectively.PGEparametersoftheDashibaoFormationbasaltsareconsistentwiththegeneraltrendofthosefoundfortheZhengziyanwointrusion,andthismightinferageneticlinkbetweenthem.
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