• 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
San Sebastian Mine

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

  Regional Office:
Av 20 de Noviembre No. 519
Durango
Mexico
34000
Phone  ...  Subscription required
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
  • 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

StatusCare and Maintenance
Mine TypeOpen Pit & Underground
Commodities
  • Silver
  • Gold
  • Lead
  • Zinc
  • Copper
Mining Method
  • Truck & Shovel / Loader
  • Cut & Fill
Production Start...
Production ceased in the fourth quarter of 2020, and exploration activities are currently ongoing.

At San Sebastian, regulatory approvals and landowner consents are required to successfully develop new mineralization.


Owners

Source: p. 146
CompanyInterestOwnership
Hecla Mining Company 100 % Indirect
The Property, which includes the San Sebastian and Andrea projects, is 100% owned by Hecla through its Mexican subsidiary, Minera Hecla S.A. de C.V (Minera Hecla).

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

Mineralization at the project occurs as low and intermediate sulfidation epithermal veins within the Saladillo valley area. Historically, the most important veins at the project have been the Francine, East Francine, Middle and North veins located at the north end of the Saladillo valley and the Andrea Vein located 4 miles to the south. The veins are hosted within a series of shales with interbedded fine-grained sandstones interpreted to belong to the Cretaceous Caracol Formation. Most of the veins strike to the west-northwest and vein dips vary from steep toward the west to shallow toward the east. True vein widths range from 5 to 30 feet, and the average true width of the veins in the district is 8 feet.

Mineralization occurs in an epithermal setting at various paleo-depths. High-grade gold and silver occur both in the very shallow environment in the upper 1,000 feet of the crust and in deep silver-gold-lead-zinc root zones of the system at depths between 2,000 and 3,500 feet below the paleo-water table. Hypogene minerals include sphalerite, galena, argentite, pyrite, chalcopyrite, native silver and gold in electrum. The veins are oxidized down to approximately 300 feet below surface and the oxidized portions of the veins contain limonite, hematite, silver halides and various copper carbonates. Matrix minerals include fine-grained to coarsely crystalline quartz bands and chlorite-quartz-adularia bands and late calcite fill. Mineralization within the vein structu ........


Mining Methods

  • Truck & Shovel / Loader
  • Cut & Fill


Summary:

Hecla operated the San Sebastian underground mine from 2001 to 2005. The life-of-mine production from the Francine and Don Sergio veins over four years was 11.2 million ounces of silver and 155,937 ounces of gold.

Hecla again operated San Sebastian using open pit and underground methods from 2015 to 2020. Production began with open pit mining and underground mining was added by 2018. The historical production during this period was 77.7 million ounces of silver and 1.4 million ounces of gold. Access to the underground workings was through ramps from the surface connecting one or more levels. Ore was mined by the cut-and-fill stoping method and extracted from the stopes using rubber-tired equipment and hauled to the surface in trucks. In the fourth quarter of 2020, San Sebastian was placed into care and maintenance upon depletion of the known economic resource. Exploration is ongoing


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits202020192018201720162015
Silver oz  ......  Subscription required  ......  Subscription required2,037,0723,257,7384,294,12381,677
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Tonnes milled  ......  Subscription required174,713 tons156,733 tons144,197 tons143,267 tons6,602 tons
Daily milling rate  ......  Subscription required479 tons429 tons395 tons391 tons
Daily milling capacity  ......  Subscription required550 tons550 tons550 tons550 tons
Subscription required - Subscription is required.

Reserves at December 31, 2022:
Indicated resources for most zones at San Sebastian based on $1500/oz gold, $21/oz silver, $1.15/lb lead, $1.35/lb zinc and $3.00/lb copper using a cut-off grade of $90.72/ton ($100/tonne); $1700/oz gold used for Toro, Bronco, and Tigre zones. Metallurgical recoveries based on grade dependent recovery curves: recoveries at the mean resource grade average 89% for silver and 84% for gold for oxide material and 85% for silver, 83% for gold, 81% for lead, 86% for zinc, and 83% for copper for sulfide material. Resources reported at a minimum mining width of 8.2 feet (2.5m) for Middle Vein, North Vein, and East Francine, 6.5ft (1.98m) for El Toro, El Bronco, and El Tigre, and 4.9 feet (1.5 m) for Hugh Zone and Andrea.

CategoryOreTypeTonnage CommodityGradeContained Metal
Indicated Sulphide 1,187 k tons Silver 5.5 oz/ton 6,579 koz
Indicated Oxide 1,453 k tons Silver 6.5 oz/ton 9,430 koz
Indicated Sulphide 1,187 k tons Gold 0.01 oz/ton 16 koz
Indicated Oxide 1,453 k tons Gold 0.09 oz/ton 135 koz
Indicated Sulphide 1,187 k tons Lead 1.9 % 22,420 tons
Indicated Sulphide 1,187 k tons Zinc 2.9 % 34,100 tons
Indicated Sulphide 1,187 k tons Copper 1.2 % 14,650 tons
Measured & Indicated Sulphide 1,187 k tons Silver 5.5 oz/ton 6,579 koz
Measured & Indicated Oxide 1,453 k tons Silver 6.5 oz/ton 9,430 koz
Measured & Indicated Sulphide 1,187 k tons Gold 0.01 oz/ton 16 koz
Measured & Indicated Oxide 1,453 k tons Gold 0.09 oz/ton 135 koz
Measured & Indicated Sulphide 1,187 k tons Lead 1.9 % 22,420 tons
Measured & Indicated Sulphide 1,187 k tons Zinc 2.9 % 34,100 tons
Measured & Indicated Sulphide 1,187 k tons Copper 1.2 % 14,650 tons
Inferred Sulphide 385 k tons Silver 4.2 oz/ton 1,606 koz
Inferred Oxide 3,490 k tons Silver 6.4 oz/ton 22,353 koz
Inferred Sulphide 385 k tons Gold 0.01 oz/ton 5 koz
Inferred Oxide 3,490 k tons Gold 0.05 oz/ton 182 koz
Inferred Sulphide 385 k tons Lead 1.6 % 6,070 tons
Inferred Sulphide 385 k tons Zinc 2.3 % 8,830 tons
Inferred Sulphide 385 k tons Copper 0.9 % 3,330 tons

Commodity Production Costs:

CommodityUnits20202019201820172016
Credits (by-product) Silver USD  ......  Subscription required  ......  Subscription required -9.38 / oz   -9.71 / oz   -9.94 / oz  
Cash costs Silver USD  ......  Subscription required  ......  Subscription required 19.1 / oz   6.35 / oz   6.59 / oz  
Cash costs Silver USD  ......  Subscription required†  ......  Subscription required† 9.69 / oz†   -3.36 / oz†   -3.35 / oz†  
All-in sustaining costs (AISC) Silver USD  ......  Subscription required  ......  Subscription required 24.1 / oz   9.45 / oz   7.95 / oz  
All-in sustaining costs (AISC) Silver USD  ......  Subscription required†  ......  Subscription required† 14.7 / oz†   -0.26 / oz†   -1.99 / oz†  
† Net of By-Product.

Operating Costs:

Units202020192018201720162015
UG mining costs ($/ton milled) USD 129.91
Combined mining costs ($/ton milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Processing costs ($/ton milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total operating costs ($/ton milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 8.5   11.2   6  
Operating Income M USD  ......  Subscription required  ......  Subscription required 0   53.6   77.2  
Gross profit M USD  ......  Subscription required  ......  Subscription required 8.4   62.1   82.7  
Book Value M USD  ......  Subscription required  ......  Subscription required 15.1   13.7   6.7  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Press Release 2023
Form 10-K 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Form 10-K 2018
Year-end Mineral Reserves 2018
Form 10-K 2017
Form 10-K 2016
Form 10-K 2015
Technical Report 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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