McEwen Mining Inc.
The Black Fox Complex
Located in Timmins
The Black Fox Complex is located in the well-established Timmins Gold Mining Camp in Northern Ontario, Canada. Its main properties, Stock and Black Fox, are positioned along the Provincial Highway 101, with the Stock property 36 kilometers east of the city of Timmins and the Black Fox property 9 kilometers east of the town of Matheson. Given the proximity to communities in a region with primary industries mining and forestry, local supplies and services are easily available and can be delivered in a timely manner at the complex.
About Diagram
The Black Fox Complex comprises 5,100 hectares of land packages intersecting 15 kilometers (9 miles) of the Destor-Porcupine Fault, which is known as the ‘Golden Highway’, has a total strike length of approximately 200 kilometers (124 miles) and hosts many of Ontario’s richest gold mines.
The Black Fox Mine is a key component of the complex, which also includes the Froome, Tamarack and Grey Fox deposits. The Black Fox mine had an initial production from 1997 to 2001. Re-commissioned in 2009, it operated continuously, with open pit commercial production from May 2009 to September 2015 and underground mining commenced in October 2011. The open pit and underground operations at the Black Fox mine produced a total of 884,000 ounces of gold to the end of 2018.
Also part of the Black Fox Complex, the Stock property hosts the Black Fox-Stock mill and is the site of the former Stock Mine, which produced 137,000 ounces of gold from an underground operation between 1989 and 2005, bringing the combined production at the Black Fox Complex to over one million ounces of gold. Exploration initiated in 2018 and continued in 2019 has defined the Stock East and the Stock West deposits east and west of the Stock Mine, within a significant three kilometers mineralized trend along the Destor-Porcupine Fault.
McEwen Mining acquired the Black Fox Complex in October 2017. In 2018 the Black Fox mine produced 49,000 gold equivalent ounces with cash costs and all-in sustaining costs of $845 and $1,137 per gold equivalent ounce, respectively and in 2019 it produced 35,700 gold ounces with cash costs and all-in sustaining costs of $825 and $1,225 per gold equivalent ounce, respectively. Cash costs have been well controlled at Black Fox, and higher all-in sustaining costs are a result of increased sustaining capital expenses related to underground development, improvement projects, and additional capital spending associated with our transitioning to owner-operated crushing at the Stock Mill.
Development of the underground access ramp to the Froome ore body, located approximately 900 meters feet away from the Black Fox open pit, commenced in December 2019, with mining from Froome anticipated to begin at the end of 2021.
The land packages of the Black Fox Complex continue to hold exploration potential to depth and along trends, that can allow us to build a future for our Ontario operations. In 2018 we invested $21 million in exploration at the complex. A property-wide exploration program, that included 120,000 meters of exploration drilling and 39,000 meters of definition and delineation drilling, has been organized to test for extensions of existing resources, follow up on significant drill results, and to investigate new exploration targets. The program delivered very encouraging results and in 2019 we invested $25.5 million in further exploration at the Black Fox Complex, completing 149,000 meters of surface-staged exploration drilling and 39,000 meters of underground-based exploration drilling. The program continued to deliver strong results, with new targets identified and an expansion of gold resources across the properties.
Commercial production from the underground mine began in October 2011. Underground ore is produced using a combination of long hole stoping, cut and fill, and narrow vein mining methods. Ore is accessed from a series of declines branching off from the main ramp to surface. The underground mine at Black Fox begins at the bottom of the open pit (approximately 200 meters below surface) and is expected to extend more than 800 meters in depth below surface. Ore mined at Black Fox is transported as run-of-mine material 28 kilometers by road trucks to the Black Fox-Stock mill site, crushed at the mill facility and fed via a conveyor system to the mill’s crushing circuit.
The crushed product is transferred to a 1,500 tonne fine ore surge bin and then fed into a 2,000 tonnes per day grinding circuit, which includes two stages of closed circuit ball milling. Soluble gold is recovered by adsorption upon granular activated carbon in CIC, CIL, and CIP trains, with a process efficiency of up to 97%. Gold is removed from the carbon in a high temperature strip vessel in a closed circuit with electro-winning deposition. Gold plate is further refined by induction smelting and cast into molds.
Located within the Abitibi greenstone belt, the Black Fox Complex has various gold mineralization occuring within the ankerite alteration zone: (1) free gold associated with shallow dipping quartz veins and stockworks in green carbonate and ankerite-altered ultramafic rocks; (2) gold-bearing pyrite; (3) gold associated with fine-grained pyrite and (4) free gold in steeply dipping sigmoidal quartz veins.
Although there is a history of exploration and production, Black Fox remains relatively under-explored. Its land packages have all the criteria characteristic of great exploration projects, including prime location within a prolific mining region, high gold endowment, presence of high-grade mineralization, multiple prospective structural trends, as well as various styles of mineralization and host rock types.
Exploration is a principal focus at the complex. A successful $21 million property-wide exploration program in 2018 has been followed up by a $25.5 million exploration program in 2019, which continued to deliver strong results, with new targets identified and an expansion of gold resources across the properties.
The main focus of Black Fox exploration is to extend mineralization around known deposits and to test new targets close to our mine and mill for potential contributions to near-term gold production.
The 2018 exploration program included airborne electromagnetic and magnetic surveys; geophysical data processing and interpretation work for the development of new drill targets; data processing and application of machine learning; and development of interactive 3D models. The 120,000 meters of exploration drilling and 39,000 meters of definition and delineation drilling completed have been organized to test for extensions of existing resources, follow up on significant drill results and to investigate new exploration targets.
In 2019 about 39,000 meters of underground exploration were targeted at adding new ounces for short-term mining, including in the upper part of the Black Fox mine. We also continued surface drilling, with 149,000 meters aimed at the highly prospective mine trend of over three kilometers in strike length, which includes the Stock East resource, the Stock Mine depth extension, the new Stock West deposit, as well as multiple targets on the Black Fox property, which include the Froome and Grey Fox deposits.
All areas explored so far have returned encouraging drill assay results, reinforcing our view about the strong exploration potential of the Black Fox Complex.
The Stock property covers a 8 kilometers (5 miles) section of the prolific Destor Porcupine Fault. A significant NE-SW trending fault (the Nighthawk Fault) intersects the Destor Porcupine Fault near the Stock Mine, making the area a prime structural setting for gold mineralization.
The property is metal stream-free, site of our current Black Fox-Stock Mill and of the former Stock Mine, which produced 137,000 gold ounces at an average grade of 5.5 g/t, from an intermittent underground operation between the early 1980s and 2004 , having reached to a relatively shallow depth of 330 m (1,080 ft).
In addition to these major structures, the property also exhibits other characteristics of strongly mineralized systems in the prolific Abitibi Greenstone Belt: intense alteration, multi-style and multi-phase mineralization, and significant gold mineralization hosted in various rock types, including wide intersections of 10-30 meters grading 1-2 g/t Au, and also higher-grade intersections of over 10 g/t Au.
Gold mineralization at the Stock Property consists of disseminated sulfides (mostly pyrite) and quartz-carbonate stockwork and breccia, hosted in sericite-silica-albite and fuchsite altered mafic and ultramafic volcanic rocks, and in highly siliceous and albite-rich dykes.
Our drilling program started in February 2018 and followed-up on historical intersections and geophysical targets, with focus on the Stock East target.
Stock East is part of a 3 kilometers long trend that also hosts the former Stock Mine. Encouraging drill results from Stock East prompted us to extend drilling activities into 2019 over this mineralized trend, also including the Stock West, Stock Mine Deep and Gap Zone targets. For more details see links above for Stock West, Stock East, Stock Mine Deep and Gap Zone targets.
Source: https://www.mcewenmining.com/operations/black-fox-complex/default.aspx
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Socio comercial de Recursos Humanos - Argentina
El Socio Comercial de Recursos Humanos supervisará todos procesos de reclutamiento y todas las actividades de recursos humanos para las operaciones existentes y los nuevos proyectos en Argentina.
Global Procurement Lead
The Global Procurement Lead will oversee all procurement and supply chain activities for existing operations and new projects, to develop and execute strategic sourcing aligned with McEwen’s overall spend.
Senior Data Analyst
We are looking for a dynamic, self-motivated professional with a passion for data. This analytical and data expert needs to establish McEwen’s analytical reporting platform in PowerBi / SQL Databases, as well as work closely in the integration between our various platforms and data sources.
Security Guard
The Security Guard, reporting directly to the Security Supervisor, is responsible for operating the mine security gate house and monitoring all activity coming on or leaving the mine site.
Mill Manager
The Mill Manager’s main responsibility is to ensure the safe and economical operation of the milling and metallurgical department.
Sample Preparation Technician x 2
Primary responsibility of a Sample Preparation Technician is to perform sample preparation of underground drill core, chips and muck samples as well as other duties given by the Shift Crew Leader during the course of a shift.
Refiner/Metallurgical Technician
Reporting to the Chief Metallurgist, the Refiner/Metallurgical Technician will ensure the safe, secure, efficient, and cost-effective operation and maintenance of the refinery to meet or exceed safety, production and cost targets, while ensuring environmental compliance.
Mill Supervisor
• Provide technical support and direction for the Mill team.
• Implementation of standards.
• Plant testing programs and operational parameters.
Multiple Mill Operator Positions
As an integral part of the McEwen Mining Mill Operations team, the Mill Operators will efficiently perform all required duties while maintaining a safe and collaborative work environment.
Senior Project Engineer
Reporting to the Manager of Technical Services, the Senior Project is responsible to assist in leading the Engineering department in the design and scheduling of the underground mine development.