Experimental investigations of subsolidus phase relations in the ternary system gold-silver-tellurium are discussed in the light of their significance for interpretation of the mineralogy and conditions of formation of telluride deposits, particularly those of Kalgoorlie, Western Australia, and Vatukoula, Fiji. Calaverite is the most abundant telluride mineral at Kalgoorlie; krennerite, indicated by the experimental results to be the low-temperature, low-pressure polymorph of AuTe 2 , is subordinate, suggesting somewhat higher temperatures and pressures than those obtaining during formation of the Vatukoula deposits, in which krennerite is relatively abundant but calaverite has not been reported.

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