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Colombia
Marmato Upper Zone Mine (Marmato Lower Mine Expansion Project)

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 Location:
85 km S 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
Mining Method
  • Cut & Fill
  • Drift & Fill
  • Longhole stoping
  • Cemented backfill
  • Backfill
  • Hydraulic backfill
Production Start...
Mine Life2041
Marmato Mine is the gold-silver project, comprising three contiguous properties: Zona Alta Property, Zona Baja Property and Echandia Property, including the Marmato Mine, the existing processing plant and the area encompassing the Upper Mine and Lower Mine, as well as the right to mine in the lower portion of the Echandia Mining Title.

Marmato Mine is currently undergoing a modernization and expansion program, which includes the construction of a new decline, mine workings, carbon in pulp processing plant and dry stack tailings facilities.

As of 12 July 2023, Aris Mining has received approval from the Corporación Autónoma Regional del Caldas (Corpocaldas), a regional environmental authority in Colombia, of the Environmental Management Plan (PMA) which now permits the development of the Marmato Lower Mine.


Owners

Source: p. 5,8,19,80
CompanyInterestOwnership
Aris Mining Corp. 100 % Indirect
Aris Mining Marmato S.A.S (operator) 100 % Direct
Marmato Mine comprises three contiguous properties: Zona Alta, Zona Baja and Echandia. Aris Mining holds a 100% interest in the Zona Alta, Zona Baja, and Echandia mining titles. Aris Mining Marmato SAS, (formerly Caldas Gold Marmato S.A.S.) a wholly-owned subsidiary of the Aris Mining.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal
  • Mesothermal
  • Porphyry


Summary:

Deposit types Marmato is interpreted to be a porphyry hosted gold deposit with shallow epithermal and deeper mesothermal features and this interpretation has informed the exploration and mining plans. The Upper Mine is distinguished by a sulfide rich, structurally controlled system of veins and veinlets of pyrite, arsenopyrite, iron-rich sphalerite, pyrrhotite, chalcopyrite, and electrum veins associated with biotite, sodic-calcic, and epidote-chlorite-carbonate alteration. Mineralization Marmato mainly comprises northwest and west-northwest trending veins and veinlets, with intermediate sulfidation epithermal and mesothermal mineralization styles transitioning with depth from the Upper to the Lower Mines. The veins outcrop at the surface, and within Aris Mining’s mining titles, mineralization extends vertically over 1,100 m and remains open at depth and along strike, and has a high expansion potential from future underground drilling programs. The Upper Mine mineralization is characterized by epithermal mineralization comprising wider, parallel, sheeted, and anastomosing sulfide rich veins and veinlets with minor quartz, carbonate, pyrite, arsenopyrite, iron rich sphalerite, pyrrhotite, chalcopyrite, and electrum. Broad zones of intense veinlet mineralization hosted within a lower grade auriferous porphyry stock are locally referred to as “porphyry pockets” or “porphyry” mineralization. In the Upper Mine, interpretations of 94 different veins and 53 zones of disseminate ........


Mining Methods

  • Cut & Fill
  • Drift & Fill
  • Longhole stoping
  • Cemented backfill
  • Backfill
  • Hydraulic backfill


Summary:

The Upper Mine is in operation and developed to the 1,000 m elevation utilizing three different mining methods, separated into two distinct zones.

The Upper Mine is the mineralized vein material between 950 m elevation to 1,300 m elevation, and is currently in operation and mined using conventional cut and fill stope methods at a mining rate of 1,250 tpd. An area at the base of the Upper Mine between the 950 m and 1,050 m elevation, referred to as the Transition Zone, occurs where the deposit changes from narrow vein style mineralization to large porphyry style mineralization. Mining in the Transition Zone is by long hole stoping and drift and fill at a mining rate of 350 tpd.

Upper Mine mining methods
Mine layout and access
Mining at the Zona Baja mining title extends approximately 300 m vertically and 900 m along the vein structure, in the area referred to as the Upper Mine. The mine has been developed with level accesses proceeding horizontally from the main portal at the surface on Level 18 to horizontal cross cuts that provide access to the veins. There are currently six production levels and one level in development, with the highest production level at Level 16 and the lowest production level at Level 21. Each level is spaced 50 m apart vertically, with the exception of Level 20, which is 60 m from Level 19. Level 18 is the main haulage level and the primary access for the mine. A track drift provides the main haulage for all material. ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2023202220212020201920182017
Gold oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required24,95125,162
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202320222021202020192018
Ore tonnes mined  ......  Subscription required
Waste  ......  Subscription required
Total tonnes mined  ......  Subscription required
Daily processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1,200 t1,200 t
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required308,575 t370,494 t340,052 t
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required843 t1,015 t932 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required1,200 t
^ Guidance / Forecast.
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Reserves at June 30, 2022:
Mineral reserves are reported above cut-off grades of 2.05 g/t gold for the Upper Mine.

Mineral resources are reported above a cut-off grade of 1.8 g/t Au for the Upper Mine.

CategoryTonnage CommodityGradeContained Metal
Proven 2,196 kt Gold 4.31 g/t 304 koz
Proven 2,196 kt Silver 16.4 g/t 1,157 koz
Probable 4,947 kt Gold 4.09 g/t 650 koz
Probable 4,947 kt Silver 14.3 g/t 2,273 koz
Proven & Probable 7,142 kt Gold 4.16 g/t 954 koz
Proven & Probable 7,142 kt Silver 14.9 g/t 3,431 koz
Measured 2.8 Mt Gold 6.04 g/t 545 koz
Measured 2.8 Mt Silver 27.8 g/t 2,509 koz
Indicated 12.7 Mt Gold 4.14 g/t 1,691 koz
Indicated 12.7 Mt Silver 16.8 g/t 6,847 koz
Measured & Indicated 15.5 Mt Gold 4.49 g/t 2,236 koz
Measured & Indicated 15.5 Mt Silver 18.8 g/t 9,356 koz
Inferred 2.6 Mt Gold 3.03 g/t 250 koz
Inferred 2.6 Mt Silver 15.4 g/t 1,265 koz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,132 / oz†   1,049 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units2022202120202019201820172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.9   2.7  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 30.4  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.2  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 0.4  
EBITDA M USD  ......  Subscription required  ......  Subscription required
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required 1.5  
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Pipelines and Water Supply
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Heavy Mobile Equipment as of June 30, 2022:
HME TypeModelSizeQuantityLeased or
Contractor
Drill jumbo (single boom) ....................... Subscription required ....................... Subscription required Leased
Loader (mini) ....................... Subscription required Leased
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required Leased
Locomotive ....................... Subscription required Leased
Scoop Tram ....................... Subscription required Leased
Truck (underground) 10 t Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required 2020
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Press Release 2023
Annual Information Form 2022
Corporate Presentation 2022
Financial Review 2022
Management Discussion & Analysis 2022
Pre-Feasibility Study Report 2022
Press Release 2022
................................... 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 2019
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Press Release 2018
Management Discussion & Analysis 2017
Technical Report 2017
Year-end Mineral Reserves 2017
Annual Information Form 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Management Discussion & Analysis 2015
Technical Report 2012
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