Geochemical affinities siderophile

TABLE 2.1 A cosmochemical and geochemical classification of the elements based upon their Lithophile/siderophile/chalcophile affinities and their refractory or volatile character (after Palme and O Neill, 2003). ... 

Geochemical constraints The siderophile elements provide an important control on the processes of core formation. Siderophile elements are those elements which have a chemical affinity for metallic iron (Section 2.3.2) and so might be expected to concentrate in the core. This is in fact what is observed, and siderophile element concentrations in the mantle are depleted relative to concentrations in chondritic meteorites, with... 

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