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Black Fox Complex, Canada

12th June 2020

By: Sheila Barradas

Creamer Media Research Coordinator & Senior Deputy Editor

     

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Name: Black Fox Complex.

Location: The Black Fox Complex is located in the well-established Timmins Gold Mining Camp in Northern Ontario, Canada.

Mine Owner/s: McEwen Mining.

Brief Description: The Black Fox Complex comprises The Black Fox Complex, comprises the operational underground Black Fox mine, the adjacent advanced Grey Fox and Froome exploration projects, and the Black Fox mill located on the nearby Stock property.

Brief History: The Black Fox mine was initially in production from 1997 to 2001. It was recommissioned in 2009, with openpit commercial production from May 2009 to September 2015. Underground mining started in October 2011.

McEwen Mining acquired the Black Fox Complex from Primero Mining in October 2017.

Primary Metals/Minerals: Gold.

Secondary Metals/Minerals: None stated.

Geology/Mineralisation: The Black Fox Complex property is underlain by rocks of the 2.750- to 2.670-million-year-old Southern Abitibi greenstone belt, in the central part of the Wawa-Abitibi subprovince, south-eastern Superior province and north-eastern Ontario.

The local geological setting is represented by Neoarchean supracrustal rocks intruded by Matachewan and Keweenawan diabase dykes and Mesozoic kimberlite dykes and pipes. The supracrustal rocks comprise ultramafic, mafic, intermediate and felsic metavolcanic rocks, related intrusive rocks, clastic and chemical metasedimentary rocks, and a suite of ultramafic to felsic alkalic plutonic and metavolcanic rocks.

The Froome project area is underlain by moderately to steeply dipping clastic metasedimentary, mafic metavolcanic, and ultramafic metavolcanic rocks, as well as chlorite ± talc schists, to the south-west. Feldspar porphyry and lamprophyre dikes intrude the ultramafic volcanic rocks and chlorite-talc schist.

The Grey Fox project is underlain by an overturned assemblage of metasedimentary and massive, pillowed, and variolitic mafic metavolcanic rocks, with minor interflow sedimentary rocks, dipping steeply to the east

Four different types of gold mineralisation have been identified at the Black Fox Complex:

  • free gold associated with shallow dipping quartz veins and stockworks in green carbonate and ankerite-altered ultramafic rocks;
  • gold-bearing pyrite;
  • gold associated with fine-grained pyrite; and
  • free gold in steeply dipping sigmoidal quartz veins.
     

Reserves: Total proven and probable reserves as at April 2020, were estimated at 300 000 t grading 5.73 g/t gold.

Resources: Total measured and indicated resources as at April 2020, were estimated at 1.1-million tonnes grading 7.56 g/t gold. Inferred resources were estimated at 100 000 t grading 7.32 g/t gold.

Mining Method: Underground ore is produced using a combination of long-hole stoping, cut-and-fill, and narrow vein mining methods.


Major Infrastructure and Equipment: Site infrastructure comprises support services, health and safety, surface, tailings storage and water management facilities.

Underground access to the mine is provided by a main ramp located in the hanging wall of the deposit.

Mining levels are located at 20 m vertical intervals. Haulage trucks are loaded on each mining level to minimise load haul dumper haulage distances.

Ore from the Black Fox mine is processed at the Black Fox mill.


Prospects: The land packages of the Black Fox Complex continue to hold exploration potential to depth and along trends.
 

Contact Details:
McEwen Mining
Tel +1 647 258 0395

Email info@mcewenmining.com

Website https://www.mcewenmining.com 

Edited by Creamer Media Reporter

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