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Mexico
El Compas Mine

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 Location:
1 km S from Zacatecas, Zacatecas, Mexico

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

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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Mechanized Cut & Fill
Production Start...
Mine Life2021
The Company suspended mining operations at the El Compas mine in August 2021 due to exhaustion of reserves. The mine, plant and tailings facilities are on short term care and maintenance, while management conducts an evaluation of the alternatives including final closure.


Owners

Source: p. 24
CompanyInterestOwnership
Grupo ROSGO, S.A. de C.V. 100 % Indirect
In May 2016 Endeavour Silver acquired Oro Silver Resources Ltd. which owned the El Compas project through its wholly owned Mexican subsidiary, Minera Oro Silver de Mexico SA de CV.

On September 12, 2022, Endeavour Silver Corp. entered into an agreement to sell a 100% interest in Minera Oro Silver de Mexico, S.A. de C.V. (“MOS”), a wholly owned subsidiary of Endeavour to Grupo ROSGO, S.A. de C.V., (“Grupo ROSGO”). MOS holds the El Compas property and the lease on the La Plata processing plant in Zacatecas, Mexico.

Pursuant to the agreement, Grupo ROSGO will pay Endeavour $5 million cash over five years with an initial payment of $250,000 on signing of the definitive agreement. Instalment payments of $500,000 will be made every six months other than the third payment, which will be $750,000. The payments are secured by a pledge of the shares of MOS.

Completed the sale of the property and the plant for US$5 million over five years.

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

The El Compas and El Orito veins have the characteristics of a low sulfidation epithermal vein system. They occur in a region characterised by numerous, high silver-grade intermediate sulfidation epithermal vein systems.

At the El Compas concession, northerly trending veins in the Chilitos Formation have finely banded, coliform and crustiform open space fill textures. Bladed quartz after calcite textures are common. Veins in felsic rocks are comprised of saccharoidal to fine-grained quartz, banded veins. Wider veins in felsic rocks are observed in the Cantera pit and at the El Compas shaft. These veins show breccia and bladed quartz-after calcite textures. Calcite is observed in bands in large andesite-hosted quartz veins and in veinlets distal to mineralised zones in very weakly propylitised rocks.

Within the El Compas ramp, the widest calcite veins (>0.75m, both black and white coarse grained calcite) occur as north-west trending veins. Large northerly trending calcite veins have not been observed on surface or in the El Compas ramp; however, thick calciterich quartz veins were intersected by drilling at deeper levels below the mine and elsewhere that appear to correlate with the north-south trending El Compas and other veins. Sulfide abundance in veins rarely exceeds 5%, and is most abundant in the mineralised veins. Pyrite or pyrrhotite are the most common sulfides. Rare sphalerite and exotic copper was observed at the 7th level of the El Compas ........


Mining Methods

  • Mechanized Cut & Fill


Summary:

Since publishing the El Compas preliminary economic assessment (“El Compas PEA”), the Company continued to optimize mining methods, the crushing circuit and grinding alternatives and was successful on a number of fronts in improving the operating metrics. The work index of the ore and the size on the motor allowed the capacity of the milling circuit to increase to 325 tpd, which allowed for the mining method to be changed to mechanized cut and fill from captive cut and fill. Mechanized cut and fill increases the mining rate but has the same cost profile as captive cut and fill previously disclosed in the El Compas PEA.


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits202120202019
Gold Payable metal koz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Payable metal koz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent Payable metal koz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019
Ore tonnes mined  ......  Subscription required  ......  Subscription required69,772 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required345 t
Tonnes processed  ......  Subscription required  ......  Subscription required69,772 t
Daily processing capacity  ......  Subscription required  ......  Subscription required500 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:
El Compas Mineral Resources cut-off grades are based on a 3.42 g/t gold equivalent.

CategoryTonnage CommodityGradeContained Metal
Indicated 20 kt Gold 6.42 g/t 4,000 oz
Indicated 20 kt Silver 78 g/t 49,000 oz
Indicated 20 kt Silver Equivalent 592 g/t 373,000 oz
Inferred 18 kt Gold 5.96 g/t 3,400 oz
Inferred 18 kt Silver 70 g/t 40,000 oz
Inferred 18 kt Silver Equivalent 547 g/t 311,000 oz

Commodity Production Costs:

CommodityUnits202120202019
Cash costs Silver USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Cash costs Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (AISC) Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units202120202019
Direct operating costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units202120202019
Sustaining costs M USD  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Proposed Heavy Mobile Equipment as of January 19, 2016:
HME TypeModelSizeQuantity
ANFO Loader ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 29, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 29, 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

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Press Release 2022
................................... Subscription required 2021
................................... 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 2019
................................... Subscription required 2019
Press Release 2018
Preliminary Economic Assessment 2017
Year-end Mineral Reserves 2017
Preliminary Economic Assessment 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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