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Mexico
El Gallo Mine

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 Location:
31 km NE from Guamúchil, Sinaloa, Mexico

  Regional Office:
Blvd. Antonio Rosales 855, Ote. Altos 12, Col. Morelos
Los Mochis
Sinaloa, Mexico
81290
Phone  ...  Subscription required
Fax52-67373-50711
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageResidual leach
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Processing
  • Heap leach
  • Carbon in column (CIC)
  • Carbon adsorption-desorption-recovery (ADR)
  • Cyanide (reagent)
Mine Life2021
Present activities are limited to residual leaching production that will continue until the end of 2021, as well as closure and reclamation activities.


Owners

Source: p. 26
CompanyInterestOwnership
McEwen Mining Inc. 100 % Indirect
Compania Minera Pangea S.A. de C.V. 100 % Direct
The Company, through its Mexican subsidiary Compañia Minera Pangea S.A. de C.V. (“Minera Pangea”) owns 100% of the El Gallo 1 mine. El Gallo 1 mine refers to the open-pit mine, heap leach operation formerly known as the Magistral mine.

Deposit Type

  • Epithermal
  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

Gold mineralization in the El Gallo 1 mine area occurs in six deposits along two distinct structural trends, northwest and northeast. A northwest trending structural zone hosts the Samaniego and San Rafael deposits. San Dimas also is hosted by a northwest-striking structure. The second structural trend is northeast-striking and includes the Sagrado Corazón, Lupita and Central deposits. Along these structural trends the mineralization is located within numerous sub-structures that may be parallel, oblique or even perpendicular to the principal trends. Mineralization among the various deposits of the El Gallo 1 area is generally similar, with the individual structural zones consisting of quartz stockwork, breccia, and local quartz vein mineralization occurring within propylitically altered andesitic volcanic rocks. The Samaniego, San Rafael, Lupita, Sagrado Corazon and Central deposits are characterized by gold accompanied by iron oxide and variable copper; the San Dimas deposit is polymetallic containing gold, silver, copper, lead and zinc.


Mining Methods


Summary:

By the end of Q2 2018, mining and crushing activities at El Gallo ceased and were followed by residual heap leaching. Closure, reclamation and residual heap leaching activities are ongoing and will continue for several years.


Crushing and Grinding


Processing

  • Heap leach
  • Carbon in column (CIC)
  • Carbon adsorption-desorption-recovery (ADR)
  • Cyanide (reagent)

Source: Subscription required

Summary:

At the El Gallo 1 mine, mineralized material is processed using heap leaching. Heap leaching consists of stacking crushed material on impermeable pads, where a weak cyanide solution is applied to the surface of the heap to leach the gold and silver. The gold and silver-bearing solution is then collected and pumped to an Adsorption-Desorption-Recovery (“ADR”) processing plant consisting of carbon columns, stripping circuits and a precious metal refinery to process gold and silver into doré bars. Doré bars are then shipped from the mine to a third party refiner to obtain bullion.

Recoveries & Grades:

CommodityParameter201820172016201520142013
Gold Head Grade, g/t 1.512.072.143.411.581.22

Production:

CommodityUnits201920182017201620152014
Gold koz  ......  Subscription required  ......  Subscription required46556338
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Equivalent koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201820172016201520142013
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,048 kt1,209 kt1,271 kt1,278 kt
Tonnes processed  ......  Subscription required  ......  Subscription required1,108 kt1,128 kt1,463 kt1,255 kt
Daily processing capacity  ......  Subscription required  ......  Subscription required4,500 t4,500 t3,000 t
Subscription required - Subscription is required.

Reserves at December 31, 2015:

CategoryTonnage CommodityGradeContained Metal
Measured 2,419 kt Gold 2.14 g/t 166.6 koz
Measured 2,419 kt Silver 7.44 g/t 578.5 koz
Indicated 1,390 kt Gold 2.24 g/t 100.1 koz
Indicated 1,390 kt Silver 7.54 g/t 336.9 koz
Measured & Indicated 3,809 kt Gold 2.18 g/t 266.7 koz
Measured & Indicated 3,809 kt Silver 7.47 g/t 915.3 koz

Commodity Production Costs:

CommodityUnits201820172016201520142013
Total cash costs (sold) Gold Equivalent USD  ......  Subscription required 791 / oz 524 / oz 440 / oz 875 / oz 749 / oz
All-in sustaining costs (sold) Gold Equivalent USD  ......  Subscription required 909 / oz 610 / oz 581 / oz 1,194 / oz 1,164 / oz
Subscription required - Subscription is required.

Financials:

Units201920182017201620152014
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 0.32  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 73   45.3  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 38   4.42  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 39.3   5.7  
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 2, 2021
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
Form 10-K 2017
Press Release 2017
Form 10-K 2016
Form 10-K 2015
Press Release 2015
Feasibility Study Report 2012
Subscription required - Subscription is required.

Aerial view:

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