Platinum-group Elements Geochemistry of the Yangliuping Magmatic Ni-Cu-PGE Sulfide Deposit: Implications of Its Genetic Link with the Extrusive Basalts

(整期优先)网络出版时间:2004-01-11
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Primitivemantle-normalizedPlatinum-groupelements(PGE)concentrationpatternsfortheZhengziyanwointrusionandDashibaoFormationbasaltsareofpositiveslope,similartomostoftheworld-classmagmaticNi-Cu-PGEsulfidedeposits.CharactersofthisintrusionanditsrelatedoresandDashibaoFormationbasaltsaretheirnegativePt-anomalyandhighconcentrationofRhrelativetoPtandPd,factsbeinginterpretedtobetheresultsofcrystallizationandfractionationofPt-alloysandspinelphase-freecrystallizationhistoryforthemagma,respectively.PGEparametersoftheDashibaoFormationbasaltsareconsistentwiththegeneraltrendofthosefoundfortheZhengziyanwointrusion,andthismightinferageneticlinkbetweenthem.