• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Mexico
Bolanitos Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
10 km NE from Guanajuato, Guanajuato, Mexico

  Regional Office:
Calle Cerro Gordo del Campestre No. 201, interior #208 Colonia Las Quintas
Leon Guanajuato
Guanajuato, Mexico
37125
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Mexico
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
Mining Method
  • Cut & Fill
  • Longhole stoping
  • Backfill
Production Start...
Latest NewsEndeavour Silver Surpasses Upper Range of Production Guidance by Delivering 9.0 Million Silver Equivalent Ounces in 2022     January 10, 2023


Owners

Source: p. 8
CompanyInterestOwnership
Endeavour Silver Corp. 100 % Indirect
Endeavour Silver Corp. acquired the Bolañitos mine Project in 2007 from Industrias Peñoles S.A. de C.V. (Peñoles). Endeavour Silver Corp. controls the Bolanitos Project through its 100% owned subsidiary, Minera Bolañitos SA. de CV.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Vein / narrow vein
  • Epithermal


Summary:

Of the geological formations associated with the Guanajuato district only the Esperanza and La Luz Formations occur in the Bolañitos mine area with mineralization residing primarily within the La Luz Formation. Mineralization is known to dissipate at the contact with the Esperanza Formation.

The Veta Madre historically was the most productive vein in the Guanajuato district, and is by far the most continuous, having been traced on the surface for nearly 25 km. The vein dips from 35° to 55º to the southwest with measured displacement of around 1,200m near the Las Torres mine and 1,700 m near La Valenciana mine. The most productive veins at Bolañitos strike parallel to the Veta Madre system.

Bolañitos mineralization is directly related to faulting. Mineralization occurs as open-space fillings in fracture zones or impregnations in locally porous wall rock. Veins which formed in relatively open spaces are the main targets for mining.

There are 21 veins within the Bolañitos mine area that are included in the mineral resource estimate. These mineralized veins are known to occur from an elevation of 2300 m down to an elevation of 1900 m.

Mineralized veins at Bolañitos consist of the classic banded and brecciated epithermal variety. Silver occurs primarily in dark sulfide-rich bands within the veins, with little mineralization within the wall rocks. The major metallic minerals reported include pyrite, argentite, electrum and ruby silver, ........


Mining Methods

  • Cut & Fill
  • Longhole stoping
  • Backfill


Summary:

The ground conditions at the San Miguel, La Luz and Lucero mines are considered to be good. The rocks are competent and require no special measures for support other than occasional rock bolting and regular scaling. Cable bolting is sometimes required during the preparation of stopes for longhole blasting. The cable bolts are installed by drilling holes in the hanging wall and fixing the bolts in place with cement pumped into the hole.

Conventional drill and blast methods are used to extract the ore at Bolañitos, and access to the mining areas is provided by ramps and audits. Mine development headings are drilled by jumbo and by jackleg. Traditionally a conventional bottom-up cut and fill mining method was employed with waste rock brought in using diesel loaders. The rock used to backfill the stopes is generated from the waste development underground.

Over the past eight years a transition to a modified long hole method has taken place wherever the width and dip of the vein is applicable to this method.

Once sill development is completed and the limits of the ore have been defined, stope production can begin. For conventional cut and fill stoping, ore is mined upward in horizontal slices using jackleg drills. Cut and fill mining is a method of short hole mining with hole lengths usually less than 2m. For long hole mining the holes are typically 12-16m in length but vary from 6 to 16m depending on the stope.

For cut-and-fill, the pr ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits2022202120202019201820172016
Silver Metal in concentrate koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required9769341,053
Gold Metal in concentrate 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  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Payable metal koz  ......  Subscription required  ......  Subscription required  ......  Subscription required9478971,011
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 required316,708 t439,005 t446,924 t507,704 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required868 t1,203 t1,224 t1,391 t
Tonnes processed  ......  Subscription required  ......  Subscription required316,708 t439,005 t446,924 t507,704 t
Daily processing capacity  ......  Subscription required  ......  Subscription required1,600 t1,600 t1,600 t1,600 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Bolañitos, Mineral Resource and Mineral Reserve cut-off grades are based on 141 g/t silver equivalent for La Luz, Lucero, San Miguel and 149 g/t silver equivalent for Belen. Metallurgical recoveries were 85.7% silver and 90.1% gold for Bolañitos.

CategoryTonnage CommodityGradeContained Metal
Proven 119,000 t Silver 33 g/t 125,000 oz
Proven 119,000 t Gold 2.74 g/t 10,500 oz
Proven 119,000 t Silver Equivalent 252 g/t 964,000 oz
Probable 394,000 t Silver 65 g/t 821,000 oz
Probable 394,000 t Gold 2.08 g/t 26,300 oz
Probable 394,000 t Silver Equivalent 231 g/t 2,925,000 oz
Measured 58,000 t Silver 99 g/t 183,000 oz
Measured 58,000 t Gold 2.73 g/t 5,100 oz
Measured 58,000 t Silver Equivalent 317 g/t 587,000 oz
Indicated 759,000 t Silver 135 g/t 3,296,000 oz
Indicated 759,000 t Gold 2.03 g/t 49,500 oz
Indicated 759,000 t Silver Equivalent 297 g/t 7,254,000 oz
Inferred 974,000 t Silver 112 g/t 3,510,000 oz
Inferred 974,000 t Gold 2.23 g/t 69,900 oz
Inferred 974,000 t Silver Equivalent 290 g/t 9,099,000 oz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs Silver USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 10.5 / oz   10.3 / oz   8.68 / oz  
Cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 849 / oz   767 / oz   646 / oz  
Cash costs Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 2.14 / oz†   -4 / oz†   -8.37 / oz†  
All-in sustaining costs (AISC) Silver USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 9 / oz†   1.62 / oz†   -4.77 / oz†  
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018201720162015
Direct operating costs ($/t milled) USD 79.470.177.364.267.757.172

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 3.5   1.6   1.6  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 39.8   48.4   56.1  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 12.5   17.5   22.8  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 11.5   15   16.1  
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2020:
HME TypeModelSizeQuantityLeased or
Contractor
Bolter ....................... Subscription required 10 ....................... Subscription required
Bolter ....................... Subscription required 10 ft ....................... Subscription required
Drill 4 ft ....................... Subscription required
Drill ....................... Subscription required 4 ft ....................... Subscription required
Drill 14 ft ....................... Subscription required Leased
Drill 16 ft ....................... Subscription required Leased
Drill jumbo (single boom) ....................... Subscription required 16 ft ....................... Subscription required
Jumbo ....................... Subscription required 4 ft ....................... Subscription required
Jumbo ....................... Subscription required 14 ft ....................... Subscription required Leased
Jumbo ....................... Subscription required 10 ft ....................... Subscription required Leased
Personnel Carrier ....................... Subscription required 3 t ....................... Subscription required
Scoop Tram 3.5 cu. yd ....................... Subscription required Leased
Scoop Tram 6 cu. yd ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 3.5 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 6 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 Leased
Scoop Tram ....................... Subscription required 1.5 cu. yd ....................... Subscription required
Scoop Tram 1.5 cu. yd ....................... Subscription required Leased
Truck (dump) ....................... Subscription required 7 t ....................... Subscription required
Truck (underground) ....................... Subscription required 20 t ....................... Subscription required
Truck (underground) ....................... Subscription required 30 t ....................... Subscription required
Truck (underground) ....................... Subscription required 30 t ....................... Subscription required
Truck (underground) 4 t ....................... Subscription required
Truck (underground) ....................... Subscription required 10 t ....................... Subscription required
Truck (underground) ....................... Subscription required 15 t ....................... Subscription required
Truck (underground) 7 cu. m ....................... Subscription required Leased
Truck (underground) 14 cu. m ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 16, 2022
....................... Subscription required ....................... Subscription required Subscription required May 16, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required May 16, 2022
....................... Subscription required ....................... Subscription required Subscription required May 16, 2022
....................... Subscription required ....................... Subscription required Subscription required May 16, 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
Annual Information Form 2022
Corporate Presentation 2022
Press Release 2022
Technical Report 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 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
Annual Report 2017
Corporate Presentation 2017
Financial Review 2017
Management Discussion & Analysis 2017
Press Release 2017
Year-end Mineral Reserves 2017
Financial Review 2016
Management Discussion & Analysis 2016
Form 40-F 2015
Management Discussion & Analysis 2015
Technical Report 2015
Management Discussion & Analysis 2013
Subscription required - Subscription is required.

News:

NewsDate
Endeavour Silver Surpasses Upper Range of Production Guidance by Delivering 9.0 Million Silver Equivalent Ounces in 2022 January 10, 2023

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.