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Minerals 2019, 9(1), 34; https://doi.org/10.3390/min9010034

Mobile Forms of Gold and Pathfinder Elements in Surface Sediments at the Novye Peski Gold Deposit and in the Piilola Prospecting Area (Karelia Region)

Institute of Earth Sciences, Geochemistry Department, St.-Petersburg State University, 7-9 University Embankment, 199034 Saint-Petersburg, Russia
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Received: 9 December 2018 / Revised: 2 January 2019 / Accepted: 4 January 2019 / Published: 11 January 2019
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Abstract

The success of prospecting for gold deposit in overburdened areas based on the using of secondary dispersion haloes mostly depends on the chosen method of geochemical survey (sampling horizon, sample preparation for analysis, etc.). At the same time, the geochemistry of gold in the supergene zone is insufficiently studied, especially it’s migration and concentration in association with other elements in surface sediments due to weathering of gold-bearing ore. The main aim of the study presented in this paper is the determination of mobile forms of gold and pathfinder elements (As, Cu, Ni, Ag, Zn, Pb, Se, Sb, Mo, Bi, and Te) in podzol soil and moraine in the areas of Karelia region with known gold mineralization. As a result of conducted experiments it was determined that the main mobile forms of gold are water-soluble and bound to organic matter, while pathfinder elements bound preferably to Fe and Mn(hydr)oxides and to organic matter. As gold and some pathfinders bind with organic matter, this form was considered in more detail, and the elements’ interaction with humic and fulvic acids was investigated. In addition, it was determined that the studied elements are quite “mobile” because the percentage of the mobile form in their total content was mostly more than 50%. The main features of the elements’ migration and concentration were identified in surface sediments of the study areas. View Full-Text
Keywords: gold; pathfinders; mobile forms; humic and fulvic acids; podzols; moraine gold; pathfinders; mobile forms; humic and fulvic acids; podzols; moraine
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Korshunova, V.A.; Charykova, M.V. Mobile Forms of Gold and Pathfinder Elements in Surface Sediments at the Novye Peski Gold Deposit and in the Piilola Prospecting Area (Karelia Region). Minerals 2019, 9, 34.

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