Agnico Eagle Mines Limited is a Canadian-based gold producer with operations in Canada, Finland and Mexico and exploration and development activities extending to the United States. Agnico Eagle has full exposure to higher gold prices consistent with its policy of no-forward gold sales. It has paid a cash dividend for 29 consecutive years as of 2010. Wikipedia.
Yilmaz E.,University of Quebec |
Yilmaz E.,First Quantum Minerals Ltd. |
Benzaazoua M.,University of Quebec |
Bussiere B.,University of Quebec |
Pouliot S.,Agnico-Eagle Mines Limited
International Journal of Mineral Processing | Year: 2014
Surface paste disposal (SPD) is a new alternative employed by the mining industry for storage of mine tailings at the surface. In comparison with the conventional slurry tailings disposal, SPD could offer operational and environmental advantages, such as a better water management, no need for complex retaining dams, a reduced footprint of the tailings disposal area, and the possibility to use progressive reclamation. This paper describes a field investigation through a large-scale experimental cell to assess an SPD application for sulphidic mine tailings. The work addresses the effect of two disposal configurations (i.e., partially cemented and un-cemented) on their hydrogeological behaviour when submitted to actual climatic conditions, focusing mainly on the implementation challenges as well as on the first results obtained. Tailings were deposited in thin layers (10 layers of 10 cm each one) into two experimental cells (D × L × H = 8 m × 15 m × 2 m). Cement was added locally (2 wt.% of Portland cement) in the first layer of the cell (CC) to study its effect; the second cell (UC) is cement free. The evolution of volumetric water content θ, suction ψ, oxygen consumption and cracks for each cell was monitored during and after deposition. Results show that the CC provides slightly higher θ and smaller ψ values than the UC, most likely due to its geological properties dictated by the bottom cemented layer. © 2014 Elsevier B.V.
Interpretations and implications of LA ICP-MS analysis of chert for the origin of geochemical signatures in banded iron formations (BIFs) from the Meadowbank gold deposit, Western Churchill Province, Nunavut
Gourcerol B.,Laurentian University |
Thurston P.C.,Laurentian University |
Kontak D.J.,Laurentian University |
Cote-Mantha O.,Agnico-Eagle Mines Limited
Chemical Geology | Year: 2015
Among the many types of mineral deposits within Archean cratons, gold mineralization is an important economic commodity with over 20,000. metric tons of gold produced from greenstone belts in 2001. Of the Archean-early Paleoproterozoic gold deposits, several different types of mineralization are known, which includes the important Algoma-type banded iron formation (BIF) where gold is locally associated with sulfide-facies zones within regionally extensive oxide-facies. It is commonly accepted that the shale-normalized chemical signature of REE. +. Y of chert bands in Algoma-type BIFs may reflect one of the three processes, each of which may be relevant to the nature and origin of the gold mineralization: (1) direct seawater precipitation; (2) involvement of and contribution from hydrothermal fluids; and (3) replacement of precursor volcanic units due to silicification. An essential question in regard to the mineralization is, therefore, whether the gold mineralizing fluids have a preference for one geochemical type of iron formation versus another. In order to assess the relevance of these competing models, we report herein the results of a LA ICP-MS study of chert samples within different Algoma-type BIFs from the Meadowbank deposit (24.5. Mt proven/probable ore reserves grading 2.8. g/t (2011)) hosted in the Neoarchean Woodburn Lake Group of the Rae Domain of the western Churchill Province, Canada. This study used 39 carefully selected and characterized (i.e., petrography and SEM-EDS imaging) chert samples from the main deposit, the Central BIF, and four additional BIFs, the Far West, West, East and Grizzly zones, with data collected using line traverses along the chert bands. The geochemical data indicate that an ambient seawater signature (i.e., enrichment in HREE relative to LREE associated with positive La and Y anomalies) dominates the samples with a lesser hydrothermal component (characterized by a positive Eu anomaly) and the influence of detrital contamination can also be detected. These initial results indicate that the methodology and protocol employed provides a reliable means to assess and interpret the chemical signature of BIFs hosting gold mineralization. In the present case, the results for the Meadowbank deposit suggest that chert from mineralized BIF units does not record a typical chemical signature that may be used as a vector for potential gold mineralization. © 2015 Elsevier B.V.
Westlake D.,Agnico-Eagle Mines Limited
ABB Review | Year: 2014
Managing the mine-to-market process is a complex challenge for any company. Manual methods and point software solutions cannot start to address the intricacies and the need for real-time visibility that characterize today's closely interrelated commercial and outbound logistics processes. The Agnico Eagle company experienced this firsthand as it grew from a single operation to seven operations spanning three countries and from providing a handful of products to more than 20 different products - all in the course of a few years. A unified platform approach to automation has helped Agnico Eagle overcome the complexities of today's market business processes and has empowered the company to reduce costs and improve commercial outcomes.
Derycke V.,University of Quebec |
Kongolo M.,University of Lorraine |
Benzaazoua M.,University of Quebec |
Benzaazoua M.,INSA Lyon |
And 5 more authors.
International Journal of Mineral Processing | Year: 2013
A surface chemical approach of different pyrite size fraction is developed in this paper in the prospect of addressing the well-known coarse pyrite flotation challenge for environmental purposes. This work aims at exploring the effect of particle size on pyrite surface chemistry through the study of three pyrite size fractions up to 425 μm. Pyrite surface evolution was investigated through dry crushing, air oxidation and aqueous conditioning using X-ray photoelectron spectroscopy (XPS) and diffuse reflectance infrared spectroscopy (DRIFT) as complementary surface characterization tools. XPS, which characterized the outmost surface (about 40 Å depth), indicated that pyrite size fraction did not impact its surface chemistry after crushing. However, DRIFT which characterizes the whole oxidation layer, led to the conclusion that ferric sulfate was more abundant in the finer fraction than in the two coarser fractions. Those two surface characterization tools allowed a thorough insight into the three-dimensional oxidation product structures of pyrite from different size fractions. The surface evolution of coarse fractions had the same surface evolution trend when submitted to aging and conditioning processes than the fine pyrite size fraction, studied in previous works, in terms of surface species speciation and their relative proportion. Those results led to a better understanding of particle size impacts on pyrite surface chemistry. © 2012 Elsevier B.V. All rights reserved.
Cote-Mantha O.,University of Quebec at Chicoutimi |
Cote-Mantha O.,Agnico-Eagle Mines Limited |
Daigneault R.,University of Quebec at Chicoutimi |
Gaboury D.,University of Quebec at Chicoutimi |
And 3 more authors.
Economic Geology | Year: 2012
The Au-Ag-Cu Brosman prospect is located in the Line Lake area on the northern limb of the Chibougamau anticline, in the northeast part of the Archean Abitibi greenstone belt. This prospect comprises a broad N-S, subvertical mineralized envelope formed in a synvolcanic fault-related environment. This envelope is at least 300 m long, up to 30 m wide, and is known to a depth of 950 m, where it remains open. It exhibits two contrasting mineralized zones that are representative of the varying styles of mineralization in the area. The Auriferous zone consists of both ubiquitous pyrite disseminations and Au-bearing silicate-sulfide veins in strongly fractured intrusive, effusive, and volcaniclastic rocks showing propylitic and chloritic alteration assemblages. The Polymetallic zone, on the other hand, is characterized by discrete, Cu-Ag-Au-rich magnetite-sulfide veins and lesser pyrite disseminations within distal propylitic and proximal potassic to sodic alteration zones. The Polymetallic zone is hosted by a chaotic assemblage of gabbro and tuff bodies interpreted as a talus megabreccia. Several lines of evidence, including the spatial distribution pattern and nature of the alteration and mineralization assemblages, metal associations, mass-balance calculations, pyrite composition, and crosscutting relationships are indicative of a preregional deformation, synvolcanic origin for the hydrothermal activity. Crosscutting relationships, alteration characteristics as well as whole-rock and LA-ICP-MS pyrite analyses reveal two stages of hydrothermal alteration and mineralization. Stage I consists of both ubiquitous disseminated pyrite, found in the Polymetallic and Auriferous zones, and contemporaneous magnetite-sulfide veins, restricted to the Polymetallic zone. Stage II is restricted to the Auriferous zone and corresponds to Au-bearing silicate-sulfide veins with characteristic vein-halo chloritic alteration overprinting Stage I alteration and mineralization. This hydrothermal activity is interpreted to have occurred concurrently with the development of the fertile, deeper magmatic-hydrothermal system related to the Chibougamau Pluton. Stage I hydrothermal activity, related to the early build-up of the volcanic sequence, formed a continuum of mineralization from discrete massive magnetite-sulfide veins to ubiquitous pyrite disseminations in a submarine talus megabreccia generated along synvolcanic faults. Afterward, a late Au-rich contribution to the hydrothermal fluids, possibly related to intermediate to felsic magmatism (the 2707.6 ± 1.4 Ma Line Lake stock), produced Stage II silicate-sulfide veins overprinting mineralization and alteration in favorably oriented and sustainably permeable fracture zones of the Auriferous zone. Overall, this study suggests that the Brosman prospect is a rare example of Archean polymetallic mineralization produced by a shallow subaqueous epithermal-style subsystem developed in a broader, fertile magmatichydrothermal arc setting. © 2012 Society of Economic Geologists, Inc.