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Mexico
Guanacevi Mine

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 Location:
247 km NW from Durango, Durango, Mexico

  Regional Office:
Calle Cerro Gordo del Campestre No. 201, interior #208 Colonia Las Quintas
Leon Guanajuato
Guanajuato, Mexico
37125
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
Mining Method
  • Cut & Fill
  • Longhole stoping
  • Cemented backfill
Production Start...
Mine Life7 years (as of Jan 1, 2021)
Latest NewsEndeavour Silver Announces Filing of NI 43-101 Technical Reports for Guanacevi and Bolañitos Mines     January 26, 2023


Owners

Source: p. 53
CompanyInterestOwnership
Endeavour Silver Corp. 100 % Indirect
Endeavour Silver Corp. controls the Guanaceví Project through its 100% owned Mexican subsidiary, Endeavour Gold Corporation S.A. de C.V. (Endeavour Gold). Endeavour Gold holds the project through its two 100% owned subsidiaries, Minera Plata Adelante S.A. de C.V. (Minera Plata Adelante) and Refinadora Plata Guanaceví S.A. de C.V. (Refinadora Plata Guanaceví).

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal


Summary:

The Guanaceví silver-gold district comprises classic, high-grade silver-gold, epithermal vein deposits, characterized by low sulphidation mineralization and adularia-sericite alteration. The Santa Cruz mine property, which forms part of the main portion of the Guanaceví Mines Project, covers about a 3.0 km strike length of the Santa Cruz fault/vein system. The Santa Cruz vein itself has been traced for 5 km along trend, and averages approximately 3.0 m in width. High-grade mineralization in the system is not continuous but occurs in steeply northwest-raking shoots up to 200 m in strike length. A secondary mineralized vein is located subparallel and subjacent to the Santa Cruz vein, in the footwall, and while less continuous is economically significant in the Porvenir Dos and North Porvenir portions of the Project. The Santa Cruz vein is similar in many respects to other veins in the Guanaceví district, except that it is the only one to lie on the west side of the horst of Guanaceví Formation and associated facies, and it dips west instead of east. In the Porvenir Dos area and the Deep Santa Cruz mine workings, a low angle rhyolite crystal-lapilli tuff and andesitic contact occurs high in the hanging wall of the Santa Cruz vein indicating a fault contact with Guanaceví Formation, which obviously cuts the contact. The Santa Cruz vein is a silver-rich structure with lesser amounts of gold, lead and zinc. Mineralization has averaged 500 g/t silver and 1 g/t gold over 3 m t ........


Mining Methods

  • Cut & Fill
  • Longhole stoping
  • Cemented backfill


Summary:

Since 2013 long-hole stoping was introduced into the operations at Guanacevi. Over the last 2 years the Guanacevi mine has transitioned from an operation dominated by conventional cut and fill mining to one dominated by long hole stope methods.

The long-hole method increases production heights from typically 1.8m to up to 17m and at a reduced cost. Dilution and hanging wall failure is controlled using cemented 11m long fortifying cable bolts. Mining dilution has been estimated by Endeavour Silver Corp. (EDR) as variable with a minimum of 0.4m of over break dilution and a minimum operational width of 2.2m. Additional dilution is derived from the footwall especially in sill development, from occasional hanging wall failure and from re-mucking of floor fill. In general, dilution is estimated at being between 15% and 32%, while unrecoverable ore is estimated at approximately 5%. The dilution material in almost all cases is mineralized.

Cut-and-fill stope cuts are generally 15m long and 1.5 - 1.8m high, and long hole stopes are 15m long and 20m high (20m between levels measured floor to floor). Access to the stoping areas is provided by a series of primary and secondary ramps located in the footwall. The ramps have grades from minus 15% to plus 12%, with plus or minus 12% as standard. The crosscuts are 4 m by 4 m for the primary ramps and 3.5 m by 3.5 m for the secondary ramps.

In the upper parts of the mine, stope access is by short (10m to 40m) c ........


Crushing and Grinding
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Processing

Source: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits2022202120202019201820172016
Silver Metal in doré koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required1,9642,0662,364
Gold Metal in doré koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent Payable metal koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required
Silver Payable metal koz  ......  Subscription required  ......  Subscription required  ......  Subscription required1,9622,0642,360
Gold Payable metal koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required322,988 t307,042 t321,113 t367,441 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required885 t841 t880 t1,007 t
Tonnes processed  ......  Subscription required  ......  Subscription required322,988 t307,042 t321,113 t367,441 t
Daily processing capacity  ......  Subscription required  ......  Subscription required1,200 t1,200 t1,200 t1,200 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Guanacevi Mineral Resource and Mineral Reserve cut-off grades are based on a 201 g/t silver equivalent for Santa Cruz Sur of Guanacevi and 207 g/t silver equivalent for Santa Cruz, 207 g/t silver equivalent for Milache and 252 g/t silver equivalent for Ocampo and Porvenir Norte of Guanaceví.

CategoryTonnage CommodityGradeContained Metal
Proven 127,000 t Silver 344 g/t 1,409,000 oz
Proven 127,000 t Gold 0.91 g/t 3,700 oz
Proven 127,000 t Silver Equivalent 417 g/t 1,709,000 oz
Probable 1,008,000 t Silver 400 g/t 12,971,000 oz
Probable 1,008,000 t Gold 1.02 g/t 33,200 oz
Probable 1,008,000 t Silver Equivalent 482 g/t 15,624,000 oz
Measured 149,000 t Silver 485 g/t 2,319,000 oz
Measured 149,000 t Gold 1.09 g/t 5,200 oz
Measured 149,000 t Silver Equivalent 572 g/t 2,735,000 oz
Indicated 476,000 t Silver 324 g/t 4,959,000 oz
Indicated 476,000 t Gold 0.7 g/t 10,700 oz
Indicated 476,000 t Silver Equivalent 380 g/t 5,811,000 oz
Inferred 806,000 t Silver 417 g/t 10,795,000 oz
Inferred 806,000 t Gold 0.93 g/t 24,200 oz
Inferred 806,000 t Silver Equivalent 491 g/t 12,728,000 oz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs Silver USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 17.2 / oz   14 / oz   11.3 / oz  
Cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,393 / oz   1,040 / oz   841 / oz  
Cash costs Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 17.6 / oz†   13.4 / oz†   10.6 / oz†  
Total cash costs Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 29.4 / oz†   20.2 / oz†   13.6 / oz†  
All-in sustaining costs (AISC) Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 27 / oz†   22.9 / oz†   19.1 / oz†  
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018201720162015
Direct operating costs ($/t milled) USD 145.64117.38135.14133.78105.1384.988

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 15.7   17.1   14.8  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 39.2   43.4   40.2  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 27.3   -4.9   4.2  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 20.5   0   3  
Subscription required - Subscription is required



Heavy Mobile Equipment as of March 27, 2018:
HME TypeModelSizeQuantityLeased or
Contractor
Drill ....................... Subscription required 16 ft ....................... Subscription required
Drill 12 ft ....................... Subscription required
Drill ....................... Subscription required 14 ft ....................... Subscription required Leased
Drill ....................... Subscription required 10 ft ....................... Subscription required Leased
Drill ....................... Subscription required Leased
Drill 14 ft ....................... Subscription required
Drill (long hole) ....................... Subscription required
Scissor Lift ....................... Subscription required 128 HP ....................... Subscription required
Scoop Tram ....................... Subscription required 1.25 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 1.5 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 2 cu. yd ....................... Subscription required Leased
Scoop Tram 4.5 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 1 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 3.5 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 2 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 2 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 3.5 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 3.5 cu. yd ....................... Subscription required
Truck (haul) 7 cu. m ....................... Subscription required Leased
Truck (haul) 110 HP ....................... Subscription required
Truck (haul) ....................... Subscription required 113 HP ....................... Subscription required
Truck (underground) ....................... Subscription required 15 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 11, 2022
....................... Subscription required ....................... Subscription required Subscription required May 11, 2022
....................... Subscription required ....................... Subscription required Subscription required May 11, 2022
....................... Subscription required ....................... Subscription required Subscription required May 11, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Press Release 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Financial Review 2018
Management Discussion & Analysis 2018
Press Release 2018
Press Release 2018
Technical Report 2018
Corporate Presentation 2017
Financial Review 2017
Management Discussion & Analysis 2017
Year-end Mineral Reserves 2017
Financial Review 2016
Management Discussion & Analysis 2016
Press Release 2016
Form 40-F 2015
Management Discussion & Analysis 2015
Technical Report 2015
Management Discussion & Analysis 2013
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News:

NewsDate
Endeavour Silver Announces Filing of NI 43-101 Technical Reports for Guanacevi and Bolañitos Mines January 26, 2023

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