Overview
| Stage | Feasibility |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Mine Life | 32 years (as of Jan 1, 2012) |
In October 2013, the Mexican government approved certain amendments to Mexico’s mining taxation system to impose new taxes and royalties on mining activities. Given the significance of these changes, the Company deferred the open pit construction decision, placed project activities on hold and initiated a thorough review of the mine and plant options at the Pitarrilla project in the fourth quarter of 2013.
In June 2017, the Company obtained from the Comisión Nacional del Agua (CONAGUA) the water permits required for mining operations to enable the use of up to a total of 2.5 million cubic meters of water per year.
The Company continues to keep the Pitarrilla project in good standing and fulfill its community and other project-related commitments. |
Source:
p. 1
The Pitarrilla project is held by SSR Durango, S.A. de C.V.
On July 6, 2022, announced the successful completion of its acquisition of the Pitarrilla Project (“Pitarrilla”) from SSR Mining Inc. Endeavour purchased Pitarrilla by acquiring all the issued and outstanding shares of SSR Durango, S.A. de C.V. from SSR Mining and Silver Standard Ventures Inc. for total consideration of approximately $70 million.
Contractors
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Summary:
The Property is centrally located within the Central Mexican Silver Belt, which is defined by numerous Ag-Pb-Zn (±Au-±Cu) deposits that are classified as intermediate sulphidation epithermal deposits (Hedenquist et al., 2000). This includes the world class silver ore systems at Fresnillo, Zacatecas, and Guanajuato. These Mexican polymetallic silver deposits consist mainly of vein systems that occupy faults and major fractures affecting Mesozoic sedimentary and marine volcanic rocks and to a lesser degree unconformably overlying Tertiary volcaniclastics and pyroclastics.
Superficially, the Pitarrilla Ag-Pb-Zn mineralisation does not display features generally considered to be characteristic of intermediate sulphidation epithermal deposits, especially considering the occurrences of near surface oxide silver mineralisation. However, when the different forms of sulphide mineralisation found in the Lower Andesite Sill, Basal Conglomerate, and Basement Zones of the Pitarrilla deposit are examined, it is evident that these bodies of sulphide silver mineralisation, do in fact, share mineralogical features with the major polymetallic vein deposits in Mexico and elsewhere in the world. Specifically, the sulphide mineral suite of pyrite/marcasite-sphalerite-galena chalcopyrite-pyrrhotitearsenopyrite tetrahedrite (-freiburgite), that is found in all of the hypogene mineral zones at Pitarrilla, is fairly diagnostic of the intermediate sulphidation subclass of epithermal deposi ........
Summary:
The Pitarrilla Project will use standard truck and shovel open-pit mining methods. The expected mining life is 20 years, including three pre-production years. The pit will be mined in five phases, starting with Breccia Ridge and Cordon Colorado. Over the life of the Pitarrilla Project, a fleet of trucks is expected to haul approximately 1.1 billion tonnes of material and 157 million tonnes of ore, at a strip ratio of 5.96:1. After mining is completed, the plant will continue to mill ore from stockpiles for an additional 12 years.
The potential to mine Mineral Resources located below the open pit was not evaluated in the Pitarrilla Feasibility Study (M3, 2012), but may be evaluated later in the Pitarrilla Project’s life.
The Pitarrilla Feasibility Study (M3, 2012) calls for the mining of 157 Mt of silver ore and 933 Mt of waste via open cut mining methods from a single, large, semi-conical pit. The total waste tonnes include additional waste for potentially acid generating (“PAG”) neutralizing material to be sourced outside the main pit. The ore and some of the waste is planned to be mined on 7.5m high benches and where there are suitable areas without ore, these are planned to be mined on 15m high benches (47% of tonnage).
The prime earth moving fleet is planned to comprise of four 21 m3 shovels, two 19 m3 loaders, up to 28 x 150 tonne trucks and ten drill rigs. The fleet is planned to move 190 ktpd to 210 ktpd of total material during peak ........
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Flow Sheet:
Summary:
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Reserves at December 31, 2020:
Mineral Resources amenable to conventional open pit mining method are constrained within conceptual pit shell at an NSR cut-off value of $16.38 per tonne (leach) or $16.40 per tonne (flotation), which incorporates the appropriate metallurgical recoveries for the respective concentrates and off-site charges.
Mineral Resources (Pitarrilla UG) are reported below the constrained open pit resource shell above an NSR cut-off value of $80 per tonne, using grade shells that have been trimmed to exclude distal and lone blocks that would not support development costs.
| Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
|
Measured
|
In-Situ (OP)
|
12,345 kt
|
Silver
|
90.1 g/t
|
35,746 koz
|
|
Measured
|
In-Situ (OP)
|
12,345 kt
|
Zinc
|
1.22 %
|
333.1 M lbs
|
|
Measured
|
In-Situ (OP)
|
12,345 kt
|
Lead
|
0.7 %
|
190 M lbs
|
|
Indicated
|
In-Situ (OP)
|
147,016 kt
|
Silver
|
97.5 g/t
|
460,728 koz
|
|
Indicated
|
In-Situ (UG)
|
5,430 kt
|
Silver
|
164.9 g/t
|
28,793 koz
|
|
Indicated
|
Total
|
152,491 kt
|
Silver
|
99.8 g/t
|
489,521 koz
|
|
Indicated
|
In-Situ (OP)
|
147,016 kt
|
Zinc
|
0.87 %
|
2,804 M lbs
|
|
Indicated
|
In-Situ (UG)
|
5,430 kt
|
Zinc
|
1.34 %
|
160.4 M lbs
|
|
Indicated
|
Total
|
152,491 kt
|
Zinc
|
0.87 %
|
2,964 M lbs
|
|
Indicated
|
In-Situ (OP)
|
147,016 kt
|
Lead
|
0.32 %
|
1,040 M lbs
|
|
Indicated
|
In-Situ (UG)
|
5,430 kt
|
Lead
|
0.68 %
|
81.4 M lbs
|
|
Indicated
|
Total
|
152,491 kt
|
Lead
|
0.33 %
|
1,121 M lbs
|
|
Measured & Indicated
|
Total
|
164,791 kt
|
Silver
|
99.1 g/t
|
525,267 koz
|
|
Measured & Indicated
|
Total
|
164,791 kt
|
Zinc
|
0.91 %
|
3,297 M lbs
|
|
Measured & Indicated
|
Total
|
164,791 kt
|
Lead
|
0.36 %
|
1,312 M lbs
|
|
Inferred
|
In-Situ (OP)
|
8,524 kt
|
Silver
|
77.4 g/t
|
21,213 koz
|
|
Inferred
|
In-Situ (UG)
|
1,230 kt
|
Silver
|
138.1 g/t
|
5,461 koz
|
|
Inferred
|
Total
|
9,754 kt
|
Silver
|
85 g/t
|
26,674 koz
|
|
Inferred
|
In-Situ (OP)
|
8,524 kt
|
Zinc
|
0.58 %
|
108.2 M lbs
|
|
Inferred
|
In-Situ (UG)
|
1,230 kt
|
Zinc
|
1.25 %
|
33.9 M lbs
|
|
Inferred
|
Total
|
9,754 kt
|
Zinc
|
0.66 %
|
142.1 M lbs
|
|
Inferred
|
In-Situ (OP)
|
8,524 kt
|
Lead
|
0.18 %
|
32.9 M lbs
|
|
Inferred
|
In-Situ (UG)
|
1,230 kt
|
Lead
|
0.89 %
|
24.1 M lbs
|
|
Inferred
|
Total
|
9,754 kt
|
Lead
|
0.26 %
|
57 M lbs
|
Corporate Filings & Presentations:
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