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Mexico
Pitarrilla Project

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 Location:
157 km N from Durango, Durango, Mexico

  Project Contacts:
Paseo del Mil Diez #202 Fracc. Lomas del Sahuatoba
Durango
Durango, Mexico
34108
Phone  ...  Subscription required
Fax52-618-130-2989
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageFeasibility
Mine TypeOpen Pit
Commodities
  • Silver
  • Zinc
  • Lead
Mining Method
  • Truck & Shovel / Loader
Mine Life32 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.
Latest NewsEndeavour Silver Announces Initial Mineral Resource Estimate and Filing of NI43-101 Technical Report on the Pitarrilla Project in Durango State, Mexico     December 8, 2022


Owners

Source: p. 1
CompanyInterestOwnership
Endeavour Silver Corp. 100 % Indirect
The Pitarrilla project is held by SSR Durango, S.A. de C.V.

July 6, 2022 - Endeavour Silver Corp. (“Endeavour” or the “Company”) (NYSE: EXK; TSX: EDR) is pleased to announce 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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Deposit Type

  • Epithermal


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 ........


Mining Methods

  • Truck & Shovel / Loader


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 ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Silver Payable metal koz 10,102312,150
Zinc Payable metal M lbs  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt  ......  Subscription required  ......  Subscription required
Lead Payable metal M lbs  ......  Subscription required  ......  Subscription required
Lead Concentrate kt  ......  Subscription required  ......  Subscription required

* According to 2012 study.

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.

CategoryOreTypeTonnage CommodityGradeContained 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

Commodity Production Costs:

CommodityUnits2022
Credits (by-product) Silver USD -5.46 / oz *  USD
Site cash costs (produced) Silver USD 11.6 / oz *  USD
Cash costs Silver USD 10 / oz *†  USD
Total cash costs Silver USD 15.9 / oz *†  USD
Assumed price Lead USD 0.9 / lb *  USD
Assumed price Zinc USD 0.95 / lb *  USD
Assumed price Silver USD 25 / oz *  USD
* According to 2012 study / presentation.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2022
OP mining costs ($/t mined) USD 1.44 *
OP mining costs ($/t milled) USD  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2012 study.
Subscription required - Subscription is required.

2012 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 2,420
G&A costs $M USD 282.1
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Net Income (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of December 14, 2012:
HME TypeModelSizeQuantity
ANFO Loader ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 16, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 16, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2012

Corporate Filings & Presentations:

DocumentYear
Press Release 2022
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Corporate Presentation 2018
Annual Information Form 2017
Corporate Presentation 2017
Feasibility Study Report 2012
Subscription required - Subscription is required.

News:

NewsDate
Endeavour Silver Announces Initial Mineral Resource Estimate and Filing of NI43-101 Technical Report on the Pitarrilla Project in Durango State, Mexico December 8, 2022

Subscription required - Subscription is required.

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