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汪清橄榄岩包体的PGE分布模式不同于世界范围橄榄岩中通常观察到的平坦型或负斜率分布 ,而以Pt Pd之间发生分异为特性 .根据Pt和Pd在合金 /硫化物熔体的分配系数的差异 ,认为部分汪清橄榄岩经历了与一含合金和硫化物的熔体平衡的过程 .由于比重的差异 ,富Pt合金同硫化物熔体发生分异而留在残余橄榄岩中 ,而富Pd的硫化物因未达饱和态而随残余熔体脱离地幔 .
The PGE distribution pattern of Wangqing peridotite inclusions is different from the flat or negative slope distribution normally observed in peridotites in the world and is characterized by the difference between Pt Pd.According to Pt and Pd in the alloy / sulfide melt Partial peridotite is considered to have been in equilibrium with a melt containing both alloys and sulfides, and the Pt-rich alloy is distinct from the sulfide melt and remains in the residual peridotite due to differences in specific gravity , Whereas the Pd-rich sulfide detaches from the mantle as the residual melt is less than saturated.