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A review of placer gold concentrate recovery and upgrade options
In 2010-11, Yukon Geological Survey awarded a contract to NEW ERA Engineering Corporation of Whitehorse to undertake a study of recent developments in gravity gold recovery techniques. In partial fulfillment of the contract, Randy Clarkson attended the Gravity Gold 2010 Optimizing Recovery Conference in Ballarat, Australia, and presented the following report and recommendations at the Yukon Placer Workshop in November 2010.
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Multi-stage precipitation and redistribution of gold, and its collection by lead-bismuth and lead immiscible liquids in a reduced-intrusion related gold system (RIRGS); Dublin Gulch, western Canada
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for a copy of this paper please contact the Yukon Geological Survey; geology@gov.yk.ca.
Yukon’s Carlin-Type Gold Deposits (Rackla Belt, Canada): Main Characteristics and New Insights on Alteration Styles and Geochemistry
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for a copy of this paper please contact the Yukon Geological Survey; geology@gov.yk.ca.
Macroscopic control on Carlin-type gold mineralization in north-central Yukon
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Stewart River Placer Project, Resource Appraisal Map for Placer Gold in the Stewart River (115N/O) and part of the Dawson (116B/C) map areas, Yukon (1:250 000 scale)
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Yukon Placer Mining Industry 2018 to 2020
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The Yukon Placer Industry Report is a reflection of the strong working relationship between the Yukon Geological Survey (YGS) and the Yukon placer mining industry. Our annual tours into the various gold fields are always productive and provide new details on placer gold settings, which are encapsulated in this report.
Yukon Placer Mining 2014 Exploration and Development Overview
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Yukon Placer Mining Industry 2021 to 2023
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The Yukon Placer Mining Industry report reflects the strong relationship between the Yukon Geological Survey (YGS) and the Yukon placer mining industry. Our annual tours into the various gold fields are always productive and provide new details on placer gold settings, which this report encapsulates.
Selected excerpts from placer gold recovery research
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The highest percentage gold recoveries occurred at mines which screened their feed to minus one inch, used both expanded metal and angle iron riffles on top of nomad matting for every sluice run and fed their runs at recommended feed and water rates. Expanded metal riffles are efficient at recovering placer gold particles finer than 1 mm while angle iron riffles are more efficient at recovering those greater than 1 mm. Slick plates allow gold particles to segregate to the bottom of the pay gravel slurry where they are more readily available for recovery by the riffles. Additional field testing of existing placer operations should be conducted to expand the knowledge of gold recovery at a greater variety of deposit types and recovery equipment such as hydraulic riffles.
Yukon Placer Mining Exploration and Development Overview 2015
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Character of unoxidized gold-silver mineralization and its relationship to beneficiation at the Brown-McDade Zone, Mt. Nansen Property, south-central Yukon
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