NOBLE METALS IN BLACK SHALES OF THE SUKHOI LOG GOLD DEPOSIT (East Siberia): EVIDENCE FROM SCINTILLATION ARC ATOMIC-EMISSION SPECTROMETRY
I.E. Vasil’eva1, E.V. Shabanova1, E.M. Goryacheva2, O.T. Sotskaya2, V.A. Labusov3,4,5, O.A. Nekludov4, A.A. Dzyuba3,4
1Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, ul. Favorskogo 1a, Irkutsk, 664033, Russia
2N.A. Shilo Northeastern Integrated Research Institute, Far East Branch of the Russian Academy of Sciences, ul. Portovaya 16, Magadan, 685000, Russia
3Institute of Automatics and Electrometry, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 1, Novosibirsk, 630090, Russia
4OOO VMK-Optoelectronics, pr. Akademika Koptyuga 1, office 100, Novosibirsk, POB 376, 630090, Russia
5Novosibirsk State Technological University, pr. K. Marksa 20/1, Novosibirsk, 630073, Russia
Keywords: Noble metals, certified reference materials of black shales, scintillation arc atomic-emission spectrometry
Abstract
Scintillation arc atomic-emission spectrometry (SAES) is used to study noble metals (NM), including Au, Ag, Pt, Pd, Ir, Os, Rh, and Ru, in black shales of the Sukhoi Log gold deposit (Irkutsk Region, Russia), with a focus on total NM contents in samples and on the compositions and sizes of NM-bearing particles. The estimated sizes of gold particles and their distribution are confirmed by results of scanning electron microscopy combined with energy dispersive X -ray microanalysis (SEM-EDX). The SAES results are in satisfactory agreement with earlier SEM-EDX data on NM species but reveal a much greater number and diversity of element associations.
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