Bolivar Mine

Bolivar is our growing Copper Mine

As of September 30, 2023

Revenue Mix
by Metal to Sep 2023 YTD
Copper Equivalent Pounds
Produced in 2023 (000s)
All-in-Sustaining Cost
(per copper equivalent pound sold) to Sep 2023 YTD

Quick Facts

Location Mexico
Ownership 100%
Deposit Type Copper skarn
Type of Mine Underground
Mining Methodology Long-hole mining
Processing Method Crushing & grinding, floatation
Milling/Processing Capacity 5,000 TPD 
Copper Eq Production Lbs (000’s) -guidance for 2023 34,500 - 39,500
Cash Costs - guidance for 2023 $1.92 - $2.05
AISC - guidance for 2023 $3.02 - $3.25

Reserves & Resources

On May 14, 2020, the Company filed an updated NI 43-101 reserve and resources estimate for its Bolivar Mine, completed by SRK Consulting, Inc. of Denver, Colorado.

Category Tonnes
(M lb)
Measured - - - - - - -
Indicated 19,352 15.1 0.8 13.8 0.2 0.95 406.9
Measured & Indicated 19,352 15.1 0.8 13.8 0.2 0.95 406.9
Inferred 21,387 14.2 0.78 13.5 0.21 0.96 453
    *A PEA Technical Report was filed on October 19, 2020 and updated (to include iron ore) in September 2021. In accordance with NI 43-101 Rules the Bolivar Mine Mineral Reserve are not valid after its issuance and have been removed until further studies are conducted to include Mineral Reserves.


  1. The effective date of the Bolivar mineral reserve and resource estimate is December 31, 2019. Details of the estimate are provided in the Company’s March 31, 2020 press releases and within a NI 43-101 technical report filed on SEDAR on May 14, 2020. Copper equivalent is based on the following metal prices: US$17.82/oz Ag, US3.08/lb Cu and US$1,354 Au. Totals for Proven and Probable are diluted for internal waste. Metallurgical recovery assumptions are based on actual plant data for 2019 and are 78.6% Ag, 88% Cu, and 62.9% Au. The equivalency expression is designed to present an in-situ copper equivalent, considering the recovered value of the other metals expressed in the value of copper percent.
    The equation is: CuEq = ((Ag*Ag$*Agrec)+(Cu*Cu$*Curec)+(Au*Au$*Aurec)) / (Cu$*Curec).

The Bolivar Mine comprises of 12 mining concessions and is a contiguous portion of the 15,217 hectare Bolívar Property land package within the municipality of Urique, in the Piedras Verdes mining district of Chihuahua State, Mexico. During 2012, the Company achieved its first full year of commercial production at the Piedras Verdes plant, which is located 6 kilometers from the Bolivar Mine that had an initial capacity of 1,000 tonnes per day. In September 2013, the Piedras Verdes plant further increased its daily throughput capacity to 2,000 tonnes per day by installing a new circuit. In 2018, an additional mill was added to help grind size optionality and improve recoveries at the plant. Production increased incrementally throughout 2019, surpassing the initial Company goal of 3,600 tonnes per day and finishing off the year with a throughput capacity of 4,200 tonnes per day. In 2020 Bolivar's througput capacity increased further to 5,000 tonnes per day and the Company completed a preliminary economic assessment in October 2020, which examined doubling production to 10,000 tonnes per day between 2024 to 2026. The Company is now conducting Pre-feasibilty Studies to further assess the economics of such an expansion.

The ore is treated using a flotation process in a copper circuit and is extracted from various copper skarn deposits which include the following:

  • A copper skarn deposit, containing copper, silver and gold


The Bolivar Property is situated within the Piedras Verdes Mining District, which is within the major north-northwest trending Sierra Madre Precious Metals Belt extending across the states of Chihuahua, Durango and Sonora in northwestern Mexico. In general, rocks in the area trend northwest and dip gently to the northeast. These rocks are also cut by several northwest and northeast-trending faults.

Skarn-type Cu-Zn-Ag-Au mineralization in the Bolivar area is structurally controlled and forms mineralized zones that are close to structures. Mineralized zones occupy pre-existing fault structures and extensional openings formed during mineralization.

The exploration program has the following goals:

  • Brownfield programs within and close to existing mines to exploit near mine targets that can be converted into resources and reserves and brought into the existing mine plans within a shorter period of time
  • Developing a pipeline of open pit and underground opportunities through a district scale study that incorporates various geological data layers, historical drill hole and mine data