PREPARATION, HOMOGENEITY EVALUATION AND COOPERATIVE STUDY OF TWO NEW CHROMITITE REFERENCE SAMPLES CHR-PT+ AND CHR-BKG |
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| Authors: | Philip J POTTS Charles JB GOWING K GOVINDARAJU |
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| Institution: | Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, U.K.;Centre de Recherches Pétrographiques et Géochimiques, B.P. No. 20, 54501 Vandoeuvre-lès-Nancy, France |
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| Abstract: | Two chromitite samples from the Isles of Shetland (North Scotland) have been processed, each in 200 kg quantities, as reference samples for the determination of gold and the platinum-group elements (PGE). One of these samples, Chromitite CHR-Pt+ is enriched in the PGE and the other, Chromitite CHR-Bkg has much lower concentrations. A detailed assessment of sample homogeneity is presented, together with the results of a cooperative study by thirty-five international geochemical laboratories, private and public. Contributed data together with derived working values are presented for Au and the PGE as well as for major, minor and a few trace elements. It is hoped that this first compilation report will encourage additional laboratories to participate in further studies of the PGE in these two CHR samples. |
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