Platinum group element (PGE) geochemistry to understand the chemical evolution of the Earth’s mantle
作者： Sisir K. Mondal
DOI: 10.1007/S12594-011-0039-Y
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摘要: Platinum group elements (PGE: Os, Ir, Ru, Rh, Pt, Pd) are important geochemical and cosmochemical tracers. Depending on physical chemical behaviour the PGEs divided into two subgroups: IPGE (Ir, Ru) PPGE (Pd, Rh). show strong siderophile chalcophile affinity. Base metal sulfides control PGE budget of Earth’s mantle. Mantle xenoliths contain types sulfide populations: (1) enclosed within silicate minerals, (2) interstitial to minerals. In terms characters included variety shows enriched patterns — similar melt-depleted mantle harzburgite, whereas resembling fractionated basalt. These have been interpreted be representative multi-stages melting process that helped shape evolution Earth.
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