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Mexico
San Martin Mine

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 Location:
44 km E from Santiago de Querétaro, Querétaro, Mexico

  Address:
Dimicilio Conoido s/n
Ranchería San Martín
Colon
Querétaro, Mexico
76280
Phone  ...  Subscription required
Fax01(419)294-01-01
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
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  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Cut & Fill
  • Room-and-pillar
  • Cemented backfill
  • Dry waste backfill
Production Start...
Mine Life10 years (as of Jan 1, 2019)


Owners

Source: p. 9
CompanyInterestOwnership
Starcore International Mines Ltd. 100 % Indirect
Compañia Minera Peña de Bernal, S.A. de C.V. (operator) 100 % Direct
Starcore is engaged in exploring, extracting and processing gold and silver through its wholly-owned subsidiary, Compañia Minera Peña de Bernal, S.A. de C.V. (“Bernal”), which owns the San Martin mine in Queretaro, Mexico.

Contractors

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Deposit Type

  • Epithermal


Summary:

The San Martín gold-silver district hosts classic, medium-grade gold-silver, epithermal vein deposits characterized by low sulphidation mineralization and adularia-sericite alteration. The San Martin veins are typical of most other epithermal silver-gold vein deposits in Mexico in that they are primarily hosted in the Upper Cretaceous black limestone and calcareous shales of the Soyatal-Mexcala Formation. Tertiary Lower Volcanic series of rhyolite flows, pyroclastics and epiclastics, overlain the sediments.

Mineralisation is generally made up of breccia that commonly is concordant with a limestone/shale contact (in the San Martin and San José areas) which forms the relatively steeply dipping “Tronco” and “Mantos” oreshoots, these veins contact the younger volcanic flows (dacite and ignimbrite) where they have formed the more horizontal portions of the deposit. The mineralized economic breccia grades from 30 g Ag/t to 250 g Ag/t. Exploration has been concentrated along the NE trending breccia zone however evidence of a northerly trend in area 30 and 31 leads to suspect possible other structures together with 2.0 g Au/t to 30 g Au/t over widths that vary from 1.5 to 17.0 m but averaging 4.0 m.

Mineralization at San Martín occurs in association with an epithermal low sulphidation, quartz-carbonate, fracture- filling vein hosted by a structure trending approximately N40°- 60°E, dipping to the 50° to 90° to the southeast.

The San Martin structur ........


Mining Methods

  • Cut & Fill
  • Room-and-pillar
  • Cemented backfill
  • Dry waste backfill


Summary:

Mine production operations are in two distinct underground zones and one under one small open pit operation. Current mining is from zones, which are contiguous to, or nearby, earlier mined out areas.

The two underground zones are known as San José II and San Martín, while the open pit is the near surface remnants is now a closed operation. Production operations have been underway at the San Martin mine since May 1994. On top of the big breccia-vein the structure becomes a manto-like. Here the Cuerpo 28 and Cuerpo 29 orebodies have been exploited partially since 1998. A set of faults crosscut the structure and thrown down the continuous oreshoot and split it into several segments where Cuerpo 30 and Cuerpo 31 have been found. In 2001 the exploration of high-grade gold bodies called "Mantos" began. The first of these oreshoots was the Body 28.

The orebody geometry and geotechnical attributes of the ore and host rocks, in both underground zones, resulted in the selection of mechanized, trackless, room and pillar stoping, with post waste rock backfill and a poor mix of waste and cement, as the most suitable mining method for ore extraction. Ore recovered from these operations is hauled to surface by truck to the mill infrastructure, where it is crushed and milled.

The San Martin underground mine is accessed through a tunnel located at the 2,050-meter level.

Since 2007, SIM (Starcore International Mines) has been in control of the day ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required121417
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Equivalent koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics202220212020201920182017
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required301.9 kt269.6 kt275.1 kt
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required650 t850 t
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1,100 t1,100 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required650 t850 t
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Reserves at September 30, 2019:
Reserve cut-off grades are based on a 1.66 g/t gold equivalent.

CategoryTonnage CommodityGradeContained Metal
Proven 277,009 t Gold 2.43 g/t 21,673 oz
Proven 277,009 t Silver 61 g/t 527,658 oz
Proven 277,009 t Gold Equivalent 28,386 oz
Probable 1,157,299 t Gold 1.95 g/t 72,372 oz
Probable 1,157,299 t Silver 18 g/t 657,772 oz
Probable 1,157,299 t Gold Equivalent 80,740 oz
Proven & Probable 1,434,308 t Gold 2.04 g/t 94,045 oz
Proven & Probable 1,434,308 t Silver 27 g/t 1,185,430 oz
Proven & Probable 1,434,308 t Gold Equivalent 109,126 oz
Indicated 134,871 t Gold 1.81 g/t 7,849 oz
Indicated 134,871 t Silver 10 g/t 43,362 oz
Indicated 134,871 t Gold Equivalent 8,382 oz
Inferred 1,578,248 t Gold 1.92 g/t 97,362 oz
Inferred 1,578,248 t Silver 20 g/t 1,027,324 oz
Inferred 1,578,248 t Gold Equivalent 110,006 oz
Total Resource 1,713,120 t Gold 1.91 g/t 105,211 oz
Total Resource 1,713,120 t Silver 19 g/t 1,070,686 oz
Total Resource 1,713,120 t Gold Equivalent 118,389 oz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Cash costs Gold Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,237 / oz   969 / oz   847 / oz  
All-in sustaining costs (AISC) Gold Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,782 / oz   1,112 / oz   1,091 / oz  
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Operating Costs:

Units20222021202020192018201720162015
Total operating costs ($/t milled) USD 6255665861534957

Financials:

Units2022202120202019201820172016
Capital expenditures M CAD  ......  Subscription required  ......  Subscription required
Revenue M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 27.8   27.2   27.5  
Pre-tax Income M CAD  ......  Subscription required  ......  Subscription required
After-tax Income M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -12   7.2   0.7  
Earnings M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -4.9   0.8   2.7  
EBITDA M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -5.2   3.5  
Operating Cash Flow M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment as of September 30, 2019:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required 1.03 cu. yd ....................... Subscription required
Jumbo ....................... Subscription required 168 inch ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Loader 1716 inch ....................... Subscription required
Scoop Tram ....................... Subscription required 3 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 2.5 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 4 cu. yd ....................... Subscription required
Scoop Tram ....................... Subscription required 1.5 cu. yd ....................... Subscription required
Truck (dump) ....................... Subscription required
Truck (underground) ....................... Subscription required 16 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 15, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Annual Result 2022
Corporate Presentation 2022
Financial Review 2022
Management Discussion & Analysis 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 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Year-end Mineral Reserves 2018
Management Discussion & Analysis 2017
Annual Report 2016
Annual Report 2015
Technical Report 2014
Subscription required - Subscription is required.

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