RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 18, ES1003, doi:10.2205/2018ES000614, 2018

Figure 1. Normalised (to carbonaceous chondrites C1 and an involatile element, e.g., Al, Ir) abundances of highly siderophile elements (Noble Metals, NM) in the Earth's mantle. (a)  Notice almost a chondrite-like concentration pattern in spite of the much lower concentrations compared with those in chondrites. However, the observed concentrations still (by orders of magnitude) exceed those, expected from equilibrium metal/silicate partitioning; moreover, such partitioning should result in rather different concentrations, in contract to those observed. Modified after Righter and Drake [2000]. (b) A comparison between terrestrial and chondritic abundances of noble metals. NM concentrations in enstatite chondrites are most similar to the terrestrial values. Modified after Walker et al. [2015].

 
Citation: Tolstikhin I. N. (2018), The late Earth's accretion: Processes and materials, Russ. J. Earth Sci., 18, ES1003, doi:10.2205/2018ES000614.
 

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