Rhenium in molybdenite of Tominsk porphyry copper deposit (the South Urals): results of the microprobe study

A. I. Grabezhev, V. V. Hiller

Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2015. V. 144. N 1. P. 81-93

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Language: Russian

Abstract

There were studied 16 molybdente flakes in two polishes on the Cameca SX-100. All scales are characterized by higher average Re contents, composed 0.09—0.13 wt % (14 flakes), 0.22 and 0.28 wt %. According to ICP-MS to the Re content of molybdenite from six samples varies in the 0.05—0.26 wt % range (average of 0.12 wt %). Within individual flakes Re content typically ranges from 0.05 to 0.15—0.18 wt %, reaching 0.3—0.4 wt % in the single analytical points or small areas of irregular shape. Molybdenite flakes typically do not contain sulfides of later stages of mineralization. Probably significant epigenetic redistribution Re in studied molybdenite samples did not happen. The matter deep spring are argued by high content of mantle component in the ore diorite and vein carbonate — (⁸⁷Sr/⁸⁶Sr)t = 0.7042—0.7050, Nd(t) = 6.5—9.4. The research confirm increased Re contents in the molybdenite of the Urals porphyry copper deposits.

Key words: molybdenum, rhenium, porphyry copper deposits, microprobe analysis, the Urals.