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Colombia
Segovia Mine

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 Location:
132 km NE from Medellin, Colombia

  Regional Office:
Cra. 43 A # 14-57, Piso 13. Edificio san Francisco
Medellin
Colombia
050021
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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
  • Gold
  • Silver
  • Zinc
  • Lead
Mining Method
  • Pillar mining
  • Resue mining
  • Cut & Fill
  • Room-and-pillar
Production Start...
Mine Life7 years (as of Jan 1, 2021)
Segovia is one of the highest grade global underground gold mines.

GCM Mining Corp. has added revenue diversification at its Segovia Operations through a new polymetallic recovery plant that is recovering commercial quantities of zinc and lead as well as gold and silver into concentrate from its tailings. The Company completed construction of the plant in 2021 and the concentrate production is currently being stockpiled as the Company finalizes offtake contracts for sales to commence in 2022.
Latest NewsAris Mining Updates Mineral Reserves And Resources For The Segovia Operations With Full Replacement Of 2022 Production     March 3, 2023


Owners

Source: p. 13
CompanyInterestOwnership
Aris Mining Corp. 100 % Indirect
Gran Colombia Gold Segovia S.A. Sucursal (operator) 100 % Direct

Contractors

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Deposit Type

  • Mesothermal
  • Vein / narrow vein
  • Intrusion related


Summary:

Gold mineralization at Segovia occurs in mesothermal quartz-sulfide veins hosted by a batholith. They have been classified as “Oxidized Pluton-Related Gold Deposits” (Sillitoe, 2008), are thought to have formed after the cooling of the batholith and may have a genetic relationship with the batholith as well as with the regional stress regime related to the Otú fault.

Gold mineralization at Segovia occurs in mesothermal quartz-sulfidic veins hosted by diorite to granodiorite rocks of the Segovia Batholith. The well-known, partially exploited veins dip at approximately 30° to the east or north-east. There are also a number of steeply dipping shear-zones hosting quartz veins with a N40W trend in the western part of the concession, termed the Las Verticales Veins System.

In general, the veins are formed of quartz with minor calcite and coarse-grained sulfides comprising pyrite, galena and sphalerite, and typically show a close spatial relationship with lamprophyre to adakite dykes. Gold and electrum occur as fine grains (<20 microns) and visible gold is generally common in the high-grade shoot sectors of the mines. Native silver has been reported. The wallrock alteration to the veins affects the basalt dykes and the granodiorite in a narrow zone a few meters wide with potassic (biotite), argillic (illite) and propylitic alteration most commonly encountered along with selective mineral replacement by chlorite, epidote, pyrite and calcite.

Gold ........


Mining Methods

  • Pillar mining
  • Resue mining
  • Cut & Fill
  • Room-and-pillar


Summary:

The Segovia operations are located in a historic mining district that has been mined for over 100 years. The majority of the mineralization has a dip of approximately 35°. The current mining methods used at the Segovia operations include room and pillar mining as well as cut and fill. Material is typically removed from the mine through use of an apique hoist system (angled hoisting system which follows the dip of the vein structure).

Current Room and Pillar Mining Method
Room and pillar mining consist of a primary and secondary phase. The primary phase mines a traditional room and pillar layout to a stated extraction ratio and the secondary phase extracts additional material from pillars.

Primary Mining
Primary mining applies a conventional room and pillar technique using manual mining methods. The panels are accessed from the overlying and underlying haulage levels as well as from down-dip development that breaks up the panels into discrete mining blocks. A loading chute from which the mined rock can be loaded into the materials handling system is constructed within the lower haulage level access. Sublevels are then developed along strike with a slight upwards gradient to make materials handling, using a slusher, simpler. Rooms between the sublevels are mined creating the room and pillar layout. The inclined sublevels from the central loading chute gives the mine a slight herring bone look. The layouts follow the typical angle of mineralizatio ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityProductUnits2022202120202019201820172016
Gold Metal in doré koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required193149126
Silver Metal in doré oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate lbs  ......  Subscription required
Lead Metal in concentrate lbs  ......  Subscription required
^ Guidance / Forecast.
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Operational Metrics:

Metrics202120202019201820172016
Tonnes milled  ......  Subscription required  ......  Subscription required451,449 t370,406 t278,201 t284,896 t
Daily milling rate  ......  Subscription required  ......  Subscription required1,237 t1,015 t762 t778 t
Daily milling capacity  ......  Subscription required  ......  Subscription required
Annual milling capacity  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2021:
The Mineral Resources are reported at an in situ cut-off grade of 2.9 g/t Au over a 1.0 m mining width.
Ore reserves are reported using a gold cutoff grade ranging from 3.20 to 3.51 g/t depending on mining area and mining method.

CategoryTonnage CommodityGradeContained Metal
Proven 204 kt Gold 12 g/t 79 koz
Probable 2,014 kt Gold 8.9 g/t 581 koz
Measured 463 kt Gold 13.9 g/t 208 koz
Indicated 3,988 kt Gold 107 g/t 1,377 koz
Measured & Indicated 4,439 kt Gold 10.9 g/t 1,562 koz
Inferred 4,868 kt Gold 10.2 g/t 1,596 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 623 / oz†   664 / oz†   655 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 907 / oz†  
† Net of By-Product.
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Financials:

Units20212020201920172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 23.9   11.7  
Revenue M USD  ......  Subscription required  ......  Subscription required
EBITDA M USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelSizeQuantityLeased or
Contractor
Drill jumbo (single boom) ....................... Subscription required 73.75 HP ....................... Subscription required Leased
Jumbo ....................... Subscription required 119.35 HP ....................... Subscription required Leased
Load-Haul-Dump (LHD) ....................... Subscription required 55 HP ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 214.5 HP ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 210 HP ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 109 HP ....................... Subscription required Leased
Scoop Tram ....................... Subscription required 112 HP ....................... Subscription required Leased
Truck (dump) ....................... Subscription required 96 HP ....................... Subscription required Leased
Truck (dump) ....................... Subscription required 220 HP ....................... Subscription required Leased
Truck (underground) ....................... Subscription required 86.5 HP ....................... Subscription required Leased
Truck (underground) ....................... Subscription required 220 HP ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 2, 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 2017

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... 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 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Press Release 2018
Press Release 2018
Management Discussion & Analysis 2017
Preliminary Economic Assessment 2017
Annual Information Form 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Press Release 2015
Preliminary Economic Assessment 2014
Subscription required - Subscription is required.

News:

NewsDate
Aris Mining Updates Mineral Reserves And Resources For The Segovia Operations With Full Replacement Of 2022 Production March 3, 2023

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