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. Author manuscript; available in PMC: 2019 Mar 6.
Published in final edited form as: Rev Mineral Geochem. 2016 Jan 1;81(1):161–238. doi: 10.2138/rmg.2016.81.04

Figure 3.

Figure 3.

Example of the use of combined petrology and LA-ICP-MS analyses to investigate the location of the HSE within rock samples. The left panel (a) shows a back-scatter electron image of a portion of olivine diogenite MIL 07001, 26, showing the textural relationship of metal and sulfide in the sample. Top right panel (b) shows the field of metal grain HSE abundances measured for MIL 07001 versus whole-rock measurements of MIL 07001 and other diogenites (shown as lines), illustrating the strong control metal grains have on the whole-rock composition of diogenites. Thick solid line in (b) is the terrestrial primitive mantle composition (Becker et al. 2006). The siting of the metal and sulfide grains in brecciated diogenites is not in the breccia matrix, indicating setting of the HSE prior to crystallisation of the diogenites. (c) Relationship between Ni/Fe in metal grains from diogenite meteorites and their whole-rock HSE abundances (shown here in terms of Os concentration), emphasizing the siting of the HSE within metals in these particular meteorites. Figure adapted from Day et al. (2012a).