Journal ArticleDOI
Silver depletion indicated by microanalysis of gold from placer occurrences, western United States
TLDR
In this article, the possibility of determining lode source by determining the content of the grain interior was explored by using electron microprobe analysis and mineragraphy, and the results showed that the extraction of silver probably by low-temperature, oxidizing aqueous solutions.Abstract:
Silver-depleted rims on gold grains, removal of silver probably by low-temperature, oxidizing aqueous solutions, possibility of determining lode source by silver content of grain interior, electron microprobe analysis, mineragraphyread more
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Journal ArticleDOI
Gold in Solution
TL;DR: Although gold is a noble metal and is effectively insoluble even in strong acids, we have known for nearly 500 years that it can be concentrated to mineable levels by being transported as dissolved species in crustal fluids as mentioned in this paper.
Journal ArticleDOI
Gold grain morphology and composition as an exploration tool: application to gold exploration in covered areas
Brian Townley,Gérard Hérail,Victor Maksaev,Carlos Palacios,Philippe de Parseval,Fabián Sepúlveda,Rodrigo Orellana,Pablo Rivas,César E. Ulloa +8 more
TL;DR: In this article, the results of research in the use of Au grain morphological and compositional properties applied in primary Au ore exploration are presented, and two different and independent topics are discussed: (1) morphological characteristics of Au grains from active stream sediments for use as a distance-to-source indicator, and (2) compositional signature of gold-rich porphyry gold grains from various deposit types for using as a discrimination tool for source type and present deposit erosion level determination.
Journal Article
Gold-rich rim formation on electrum grains in placers
TL;DR: In this article, a gold-rich rim was observed to form by precipitation of gold from the surrounding solution, because simple leaching of silver from the electrum surface is an ineffective mechanism for the enrichment of gold.
Journal ArticleDOI
A review of the flotation of native gold and electrum
G.C. Allan,J.T. Woodcock +1 more
TL;DR: A review of gold and electrum flotation can be found in this article, with a focus on the possibility of collectorless flotation of the gold and other gold-containing ores.
Journal ArticleDOI
The Relationship between Placer Gold Particle Shape, Rimming, and Distance of Fluvial Transport as Exemplified by Gold from the Klondike District, Yukon Territory, Canada
TL;DR: In this article, a semiquantitative study of various physical features of approximately 2,700 gold particles from 21 lode deposits and 36 placer deposits in the Klondike district, Yukon Territory, Canada, was undertaken.