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American Mineralogist, 2014
We use microscopic and electron microprobe techniques to study samples of ores containing native gold with dark rims of Au-Ag sulfides from six deposits and ore occurrences of Russia: Khopto (Au-Cu-skarn), Ulakhan, Yunoe (Au-Ag epithermal), Dorozhnoe, Konechnoe, and Yakutskoe (Au-quartz).
Galina A Palyanova
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We use microscopic and electron microprobe techniques to study samples of ores containing native gold with dark rims of Au-Ag sulfides from six deposits and ore occurrences of Russia: Khopto (Au-Cu-skarn), Ulakhan, Yunoe (Au-Ag epithermal), Dorozhnoe, Konechnoe, and Yakutskoe (Au-quartz).
Galina A Palyanova
exaly +2 more sources
Surface Typochemistry of Native Gold
Doklady Earth Sciences, 2018Using the methods of electron spectroscopy of the surface and SEM–EDS, it is shown that native gold of the deposit related to the epithermal Au–Ag ore formation contains oxidized gold with an oxidation degree of Au (I) or higher on the surface. A thin layer (~15 nm) with high concentrations of Ag and S and an underlying SiO2-bearing layer with a ...
V. L. Tauson +4 more
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Native Gold of the Chudnoe Gold–Palladium Deposit (Subpolar Urals, Russia)
Russian Geology and Geophysics, 2023Abstract ––The Chudnoe gold–palladium deposit, located within the Central Ural uplift, is confined to the axial zone of an anticlinal structure complicated by faults. Veinlet mineralization is localized in fractured and brecciated Late Riphean–Vendian rhyolites. Native gold and palladium minerals are concentrated mainly in veinlets of Cr-
S.A. Onishchenko, S.K. Kuznetsov
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Isolated single-molecule magnets on native gold
Chemical Communications, 2005The incorporation of thioether groups in the structure of a Mn12 single-molecule magnet, [Mn12(O12)(L)16(H2O)4] with L = 4-(methylthio)benzoate, is a successful route to the deposition of well-separated clusters on native gold surfaces and to the addressing of individual molecules by scanning tunnelling microscopy.
L. ZOBBI +10 more
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Evaluation of a diagnostic leaching technique for gold in native gold and gold ± silver tellurides
Minerals Engineering, 2001Abstract A detailed investigation of the stability in cyanide solutions of native gold and gold ± silver tellurides in a flotation concentrate from the Golden Mile, Kalgoorlie, has been undertaken to assess whether leaching under different conditions can be used to quantify the distribution of Au between native gold and gold ± silver tellurides, as ...
K.J. Henley, N.C. Clarke, P. Sauter
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Trace element distribution in native gold
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1996Abstract PIXE with the HIAF proton microprobe has been used to study the trace element distribution in gold from alluvial sources and ore samples, to investigate the possibility of identifying characteristics distributions associated with different types of geological environments.
S.H. Sie, S. Murao, G.F. Suter
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A review of the flotation of native gold and electrum
Minerals Engineering, 2001Abstract Native gold and electrum are naturally-occurring alloys containing gold and silver and a little copper. They are the most common and important forms of gold in ores. Their recovery by gravity concentration, cyanidation, or flotation from ores, typically containing 0.1–20 g/t Au is of great commercial importance.
G.C. Allan, J.T. Woodcock
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The host minerals of native gold
Economic Geology, 1944An intensive review of the literature as well as microscopic study of many ores shows that gold occurs most frequently in direct contact with the following ore minerals in the order named: pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, bismuth minerals, pyrrhotite, tetrahedrite-tennantite.
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Evolution of Native Gold under Exogenous Conditions
Russian Geology and Geophysics, 2020Abstract ––A long-term study of the typomorphism of native gold under exogenous conditions gave an insight into its evolution in time and space. The morphology, internal structure, and chemical composition of native gold change depending on the duration of its occurrence under near-surface conditions and on the thermodynamic parameters ...
Z.S. Nikiforova +2 more
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