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地球学报  2006 

新疆哈密白石泉含铜镍镁铁-超镁铁质岩体铂族元素特征

DOI: 10.3975/cagsb.2006.02.04

Keywords: 铂族元素,镁铁超镁铁质岩,新疆白石泉

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Abstract:

新疆哈密白石泉镁铁超镁铁质岩体的铂族元素研究表明,岩体的铂族元素总含量较低,原始地幔标准化模式具镁铁质岩石的特征,并具Pt正异常,且铂族元素的分异主要受结晶分异作用的影响。岩体的Cu/Pd、Se/S、Ti/Pd值表明其发生过硫化物的熔离作用。Pd/Ir、Ni/Cu特征表明了岩体系高镁玄武岩岩浆的产物。铂族元素特征揭示了白石泉岩体硫化物的熔离作用是由原始岩浆结晶分异导致的,岩体的形成是原始岩浆发生橄榄石等的结晶,导致硫化物的熔离作用后,其残余岩浆演化的结果。

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