The careers of many scientists concerned with composition, structure, and history of the upper mantle are linked to the researches of Francis R. (Joe) Boyd. This was particularly the case from the mid-1960s when he became engrossed in kimberlites and their deep-seated xenoliths.

At the beginning of his career in 1956 he became a staff member at the Geophysical Laboratory, Carnegie Institution of Washington, and was widely regarded as a leading experimental petrologist. For example, in his work on phase equilibria studies, notably within the amphibole group, he developed a heating stage coupled with an X-ray spectrometer to record transitions....

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