Results 261 to 270 of about 705,880 (306)

Trace element distribution in native gold

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1996
Abstract 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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Evolution of Native Gold under Exogenous Conditions

Russian Geology and Geophysics, 2020
Abstract ––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, Yu.A. Kalinin, V.A. Makarov   +2 more
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Evaluation of a diagnostic leaching technique for gold in native gold and gold ± silver tellurides

Minerals Engineering, 2001
Abstract 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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The host minerals of native gold

Economic Geology, 1944
An 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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Museum specimens of native Scottish gold

Transactions of the Edinburgh Geological Society, 1879
There are several reasons that lead me to suppose that it is desirable to place upon record some account of the various samples of Scotch gold and gold quartz, which are to be found in our national and other public museums. The most important of these reasons is, that I believe not a few of the specimens in question to be spurious, in so far as they ...
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Native gold in a Hawaiian alkalic magma

Economic Geology, 2003
Native gold found in fresh basanite glass from the early submarine phase of Kilauea volcano, Hawaii, may be the first documented case of the transport of gold as a distinct precious metal phase in a mantle-derived magma. The gold-bearing glass is a grain in bedded volcanic glass sandstone (Japan Marine Science and Technology Center (JAMSTEC) sample ...
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Surface composition of native gold and Ag/Au alloys

Journal of Electron Spectroscopy and Related Phenomena, 1981
Abstract The surface composition of Ag/Au alloys has been studied by X-ray photoelectron spectroscopy (XPS). Surface segregation of Ag is observed, particularly for alloys having low Ag content. The content of Ag in the first surface monolayer is in accordance with data from ion scattering and with a theoretical model for segregation in ordered ...
V.I. Nefedov, Y.A.V. Salyn, V.A. Makeev, V.I. Zelenov   +3 more
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Gold mineralizations and native gold morphology

1993
Not ...
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Native Tribunals In The Gold Coast 1844—1927

Journal of African Law, 1957
Throughout British Africa today the future of the native courts (otherwise called African, customary, or local courts) is in the melting-pot, and is the subject of much discussion and deep concern. Considerable legislative and administrative changes affecting these courts are already being made, especially in West Africa.
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Gold (Au, Native Gold)

2023
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