In the nineties, geochemists turned more and more to cosmochemistry, the geochemical study of extraterrestrial (ET) material. It seemed to many that mantle geochemistry was going round in circles and was no longer the branch of geochemistry where paradigm changing discoveries could be made. This was quite arrogant and inexact, as new concepts and novel tools including terrestrial extinct radioactivities and chemical geodynamics turned out to still have good days ahead. New instruments were being delivered to the CRPG, starting with the Cameca IMS 1970 large sector ion probe, the first model ordered by Etienne Deloule and Marc Chaussidon. Guy...
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