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Colombia
La Mina Project

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 Location:
4 km SW from Venecia, Colombia

  Project Contacts:
1030 W. Georgia Street, Suite 1830
Vancouver
British Columbia, Canada
V6E 2Y3
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Fax+1-604-682-3591
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  • Overview
  • Owners
  • Geology
  • Mining
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  • Production
  • Reserves
  • Costs & Financials
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  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
  • Copper
  • Gold Equivalent
Mining Method
  • Truck & Shovel / Loader
Mine Life10.4 years (as of Jan 1, 2022)
Latest NewsGoldMining Triples Gold Equivalent Inferred Resource Estimate To 1.45 Million Ounces At La Mina Project With La Garrucha Discovery     January 23, 2023


Owners

Source: p. 18
CompanyInterestOwnership
GoldMining Inc. 100 % Indirect
GoldMining Inc. (“GoldMining”) owns the property through its wholly owned subsidiary, Bellhaven Copper & Gold Inc. (“Bellhaven”) which in turn owns the property through its wholly-owned Colombian subsidiaries Bellhaven Exploraciones Sucursal Colombia ("Bellhaven Exploraciones") and La Mina Fredonia S.A.S. (formerly Aurum Exploration Inc. Colombia).

Contractors

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Deposit Type

  • Porphyry


Summary:

The La Mina Project lies within the Middle Cauca Belt of Miocene-age volcano-plutonic rocks of central Colombia. This belt hosts several significant porphyry gold or copper-gold disseminated deposits such as La Colosa, Titiribí, Quebradona, and Quinchia, as well as large epithermal gold districts such as Marmato.

Localized intrusive centers (e.g., La Cantera, Middle Zone, El Limon, and La Garrucha) comprise a series of intermediate composition porphyries and related intrusive (emplacement) breccias.

LA CANTERA PROSPECT
The principal ore minerals associated with the Au-Cu porphyry mineralization at La Mina are chalcopyrite and lesser bornite, both with associated gold mineralization. Secondary copper minerals (chalcocite, azurite, malachite and chrysocolla) do occur locally in the upper portions of the La Cantera prospect. Overall gold mineralization greater than 0.3 g/t Au is sulfide-poor and typically contains less than 1% total sulfides. In this type of mineralization chalcopyrite ± bornite are more abundant than pyrite.

MIDDLE ZONE PROSPECT
The principal ore minerals associated with the Au-Cu porphyry mineralization at Middle Zone consist of chalcopyrite, pyrite, and, in very rare cases, bornite. Secondary copper minerals (chalcocite, cuprite, malachite and chrysocolla) do occur locally in the shallow portions at Middle Zone prospect; they represent supergene alteration of primary hypogene copper mineralization. Generally, gold ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

According to PEA evaluates conventional surface mining methods using surface drill and blast techniques with off-highway haul trucks and front-end loaders to be appropriate for the La Mina Project.

A 24-month stripping campaign is estimated and scheduled before the mine starts producing mineralized material for the process plant. It is anticipated that these activities will be performed by third-party contractors. The initial stripping phase of the mine plan is comprised of steep terrain that will require smaller equipment and will be slower than production mining activities. No mineralized material is expected during the stripping campaign; however, any mineralized material encountered will be stockpiled near the process plant.

After the 24-month stripping campaign, production mining begins at a rate of 46k tonnes per day, delivering and sustaining 10k tonnes per day of mineralized material to the process plant for 10 years.

During the first 3 years, most of the process plant feed comes from the Middle Zone pit, while enabling La Cantera to be prepared as it has a higher strip ratio. Starting in year 4, the core of the Middle Zone pit mineralized zone is exposed and becomes the primary source for process plant feed for years 4 through 9, leaving La Cantera idle until the last 2 years of mining.

Once the mine operation is in full production in year 1, it is estimated all material will be drilled and blasted prior to loading into h ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityProductUnitsLOM
Gold Payable metal M oz 0.7
Gold Metal in copper conc. M oz 0.7
Silver Payable metal M oz  ......  Subscription required
Silver Metal in copper conc. M oz  ......  Subscription required
Copper Payable metal M lbs  ......  Subscription required
Copper Metal in copper conc. M lbs  ......  Subscription required
Gold Equivalent Payable metal M oz  ......  Subscription required
Gold Equivalent Metal in copper conc. M oz  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Daily mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
* According to 2022 study.
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Reserves at January 12, 2022:
Mineral resources Cutoff Grade 0.25g/t Au.

CategoryTonnage CommodityGradeContained Metal
Indicated 28,247 kt Gold 0.73 g/t 662 koz
Indicated 28,247 kt Silver 1.76 g/t 1,602 koz
Indicated 28,247 kt Copper 0.24 % 150,526 k lbs
Indicated 28,247 kt Gold Equivalent 1.09 g/t 989 koz
Inferred 13,633 kt Gold 0.65 g/t 287 koz
Inferred 13,633 kt Silver 1.76 g/t 772 koz
Inferred 13,633 kt Copper 0.27 % 81,246 k lbs
Inferred 13,633 kt Gold Equivalent 1.05 g/t 464 koz

Commodity Production Costs:

CommodityUnitsAverage
Credits (by-product) Gold USD  ......  Subscription required&nbs
Site cash costs (produced) Gold USD  ......  Subscription required&nbs
Total cash costs Gold USD  ......  Subscription required *†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required *†
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
† Net of By-Product.
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Operating Costs:

Units2022
OP mining costs ($/t mined) USD 1.73 *
OP mining costs ($/t milled) USD  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
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2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Net Income (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of January 12, 2022:
HME TypeSizeQuantity
ANFO Loader 9.378 t ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
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....................... Subscription required ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 12, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 12, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 12, 2022
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Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2022
Press Release 2016
Preliminary Economic Assessment 2013
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News:

NewsDate
GoldMining Triples Gold Equivalent Inferred Resource Estimate To 1.45 Million Ounces At La Mina Project With La Garrucha Discovery January 23, 2023

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