Radioactive disequilibrium in surf icial materials from uraniferous environments in Northern Saskatchewan

Abstract Scientists throughout the world have observed radioactive disequilibrium in the uranium decay series. Radiometric and fluorometric determinations of U in plants from the Goldfields district and in sediments and rocks from the Beaverlodge district exhibit marked radioactive disequilibrium. The eU/U ratio in plants rooted in mineralized ground shifts from greater than unity to less than unity for those rooted in background soils. A similar shift is observed in the transition from rocks to stream sediments and to lake sediments in the Beaverlodge district.Results of a Rn-Ra-U survey of lake bottoms in the Key Lake district show that anomalous hydromorphic U from U mineralization is parallelled by anomalous Rn, even though there is much less Ra in the lake-bottom sediments than one would expect from the amount of U present.
Keywords: Uranium, Saskatchewan, Surficial materials, Radioactivity, Plant geochemistry, Stream-sediment geochemistry, Lake-sediment geochemistry, Goldfields district, Beaverlodge district, Key Lake district.
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Publication: CIM Bulletin
Author(s): R.H. McCORKELL
Issue: 818
Volume: 73
Year: 1980
Text
Summary: The treatment of nickel-copper concentrate in the new smelter at Falconbridge Nickel Mines Limited, Falconbridge, Ontario, is described. The concentrate in a slurry form is partially roasted in a fluid-bed roaster and the calcine is smelted in an electric furnace. The roaster gases are treated in an acid plant.
Publication: CIM Bulletin
Author(s): A.L McKAGUE, G.E. NORMAN, J.F. JACKSON
Keywords: Pyrometallurgy, Non-ferrous pyrometallurgy, Copper smelting, Nickel smelting, Falconbridge Process, Roasters, Fluid-Bed roasters, Acid Plants, Electric furnaces, Process control, Ventilation.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: This paper describes the automation of a mine hoist ore loading pocket using a programmable controller. It provides an introduction to programmable control, and outlines the various modes and operating sequences of the loading pocket. A comparison is made with previous equipment to illustrate the increased flexibility, reliability and diagnostic functions that are gained.
Publication: CIM Bulletin
Author(s): S.P. JEKIELEK
Keywords: Automation, Loading pockets, Control systems, Programmable control, Safety, Maintenance, Electrical systems.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: The Noranda Process at the Home Division of Noranda Mines Limited now smelts approximately 350,000 short dry tons of concentrate a year, which is 40% of the total smelter throughput. Campaigns are averaging 200 days and refractory consumption is much lower than in the conventional smelter. In this paper, details of recent operation are given, together with updated projections for operation with higher levels of oxygen enrichment.
Publication: CIM Bulletin
Author(s): J.B.W. BAILEY
Keywords: Pyrometallurgy, Non-ferrous pyrometallurgy, Noranda Process, Continuous smelting, Copper smelting, Refractory wear, Tuyere silencers, Off-gas handling, Slag handling, Matte handling, Oxygen.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: Both the Bond and the Hardgrove grindability tests are widely used in the mineral industry to measure the ease of the comminution displayed by a material. The Hardgrove test is mainly used for coals, whereas the Bond grindability test is mainly applied to hardrock minerals. The Bond grindability has the advantage that it can be empirically related to the energy required for comminution (work index), whereas the Hardgrove grindability test has the advantage of being easier to perform. In an...
Publication: CIM Bulletin
Author(s): A. MclNTYRE, LR. PLITT
Keywords: Materials engineering, Grindabilities, Bond test, Hard-grove test, Ball mills, Work index.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: The paper deals with the impact of fleet imbalance on a deterministic evaluation of shovel fleet productive capacity. It shows that if the fleet imbalance is overlooked, then estimated fleet productive capacity will be overrated.The paper shows that fleet imbalance inflates utilization, and care must be taken when using such statistics which are derived from reported field-equipment-hows. It shows that the utilization must be deflated by a factor called 'balancing efficiency' in order to...
Publication: CIM Bulletin
Author(s): JEAN-LUG COLLINS
Keywords: Open-Pit mining, Fleet imbalance, Production, Trucks, Shovels, Operating efficiency, Equipment.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: Most of the lode and placer gold production in the Canadian Cordillera has been derived from mines and placers in the In-termontane and Omineca belts. Gold has been produced from rocks of Precambrian to Eocene age, but the preferred host environment contains Upper Paleozoic to Upper Jurassic eugeosynclinal or arc-type sedimentary and volcanic rocks adjacent to plutonic complexes which have a wide variety in both size and composition. Auriferous quartz lodes occur in fissures and shear zones...
Publication: CIM Bulletin
Author(s): D.A. BARR
Keywords: Gold deposits, Cordillera, Placer gold, Lode gold, Pioneer Mine, Bralorne Mine, Rossland Camp, Silbak Mine, Premier Mine, Hedley Camp, Barkerville Camp, Sheep Creek, Ymir district, Surf Inlet Mine, Zeballos Camp, Brandywine Mine, Northair Mines Carolin Mines, Cinola deposit, Ore controls.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: The paper presents the engineering design and experience gained so far with a dewatering system for an open-pit uranium mine planned at Key Lake in Northern Saskatchewan.The results of hydrogeological investigations preceding engineering exhibit an extensive unconfined overburden aquifer hydraulically connected with the underlying Athabasca Formation and basement rocks, both of relatively low hydraulic conductivity. The overburden aquifer is embedded in a bedrock trough, with the deepest...
Publication: CIM Bulletin
Author(s): WERNER UNLAND, NICK HOLL
Keywords: Key Lake mine, Dewatering, Open-pit mining, Saskatchewan, Hydrogeology, Surficial deposits, Groundwater, Wells, Pumping.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: Hudson Bay Mining and Smelting Co., Limited, Flin Flon, Manitoba, has developed a metallurgical wastewater treatment system employing two-stage lime neutralization, sludge recirculation and conventional mechanical thickening.Laboratory investigations, initiated in 1970, led to the construction of a pilot-scale mine-water treatment plant, at Schist Lake Mine, in early 1971. This plant, treating 600 cubic metres /day of wastewater containing 30-60 mg/l zinc, demonstrated metal extraction...
Publication: CIM Bulletin
Author(s): R.V. TYPLISKI, G.J. LABARRE
Keywords: Wastewater treatment, Hudson Bay Mining, Flin Flon, Neutralization, Sludge recirculation, Thickening, Schist Lake Mine, Automatic operation, Water treatment.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: A characteristic of all methods of copper concentrate smelting is that slags with a high copper content are produced at some phase of the operation. Recirculation to the smelting unit, electric furnace reduction or flotation are at present used on an industrial scale to recover the copper from these slags.This paper describes the application of the top-blowing technique, originally developed by KHD Humboldt-Wedag AG for refining of metallic copper, for the treatment of copper-containing...
Publication: CIM Bulletin
Author(s): K.B. CHAUDHURI, F.E. RACHOR, I.D. WEBB
Keywords: Pyrometallurgy, Non-ferrous pyrometallurgy, Copper pyometallurgy, Top-blowing reactors, Cyclones, Slag conditioning, Smelting.
Issue: 818
Volume: 73
Year: 1980
Text
Summary: The area of uranium deposition is situated within the Churchill Province on the western edge of the Wollaston lithostructural domain where it underlies the eastern edge of the Helikian Athabasca Formation. The Collins Bay deposit is 6 miles north-northeast of the Rabbit Lake mine. Two principal zones of uranium mineralization are described.The "A " zone is a partly eroded, high-grade pod of metal oxide and arsenides sheathed by clay-like minerals. It trends north-northeast and lies...
Publication: CIM Bulletin
Author(s): B.E. JONES
Keywords: Uranium, Collins Bay deposit, Saskatchewan, Geology, Mineralization, Paragenesis, Nickel, Athabaska Formation.
Issue: 818
Volume: 73
Year: 1980
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