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Colombia
Soto Norte Project

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 Location:
7 km NE from California, Colombia

  Project Contacts:
Cra. 43 A # 14-57, Piso 13. Edificio san Francisco
Medellín
Colombia
050021
Phone  ...  Subscription required
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Overview

StagePermitting
Mine TypeUnderground
Commodities
  • Gold
  • Silver
  • Copper
Mining Method
  • Avoca
  • Longitudinal stoping
  • Cemented backfill
Mine Life14 years (as of Jan 1, 2021)


Owners

Source:
CompanyInterestOwnership
Aris Mining Corp. 20 % Indirect
Aris Mining Holdings Corp. (operator) 20 % Direct
Mubadala Investment Company 80 % Indirect
April 12, 2022 - Aris Gold Corporation (Aris Gold or the Company) (TSX: ARIS) ( OTCQX: ALLXF) announces that, further to the Company's news release of March 21, 2022, it has closed the acquisition of a 20% joint venture interest in the Soto Norte gold project in Colombia, with the option to acquire a further 30% interest.

Contractors

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Deposit Type

  • Porphyry
  • Epithermal
  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

The Soto Norte mineral deposit is classified as a high-sulphidation epithermal deposit, with gold, silver and copper occurrences, mainly in sulphides. The deposit is related to the Miocene porphyry stocks and dikes that have been identified in the area, cross cutting the older sedimentary, igneous and metamorphic rocks.

Mineralisation within the Soto Norte Project comprises parallel anastomosing veins which occupy the composite fault system. These veins have various widths and characteristics depending upon the open spaces provided by the fault movements, which occurred over time, as evidenced by multiple mineralised events recorded within the individual vein structures and host rocks.

Veins at Mascota exhibit open-space filling textures along the Mascota related structures, indicating low overburden stress consistent with a shallow crustal emplacement typical of epithermal vein systems.

Brecciation is apparently of a hydrothermal origin (angular fragments, commonly monolithic, locally with jigsaw textures and, typically fragment-supported, dominantly cemented by hydrothermal minerals) and is observed in most mineralised zones, with the common feature that the brecciated fragments consist of local wall rock.

The mineralisation has a variety of textures of cement fill that are characteristic of an epithermal environment, with colloform bands of quartz and colloform pyrite that indicate super saturation in a relatively low temperat ........


Mining Methods

  • Avoca
  • Longitudinal stoping
  • Cemented backfill


Summary:

The parallel vein systems in the Soto Norte Project area are defined over a strike length of 2.6 km and the two main vein systems considered, Mascota and Gigante, each have strike lengths of around 2.0 km. Other minor vein structures of mining interest have strike lengths as low as 15 m.

The majority of vein structures are sub vertical, dipping from 70 to 80° and can range in true width from 1 m or less to over 30 m (typically between 3 and 18 m). There are some vein structures in the hangingwall zones which dip at 60°, and an isolated zone in the southwest where the vein lays over on a 15° dip, closer to surface.

The vein structures extend to surface, with significant variances in elevation due to the terrain, and are open at depth and along strike. The depth limit of the resources considered for mining is 2,100 mRL.

The minimum stope width defined for mining is 2.5 m and stoping blocks are categorised as follows:

- Longitudinal narrow stoping for stope widths from 2.5 to 5m;
- Bulk (or wide) longitudinal stoping for stope widths greater than 5m.

The predominant mining method considered for the Project is Modified Avoca for stoping blocks identified as longitudinal narrow and wide stopes. CRF is applied to limited specific areas of poor ground classification.

The mine plan supporting the Mineral Reserve targets a sustainable production rate of 2.6 Mtpa over a 7- year period. The ramp up to full produc ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Metal in copper conc. koz 2,214
Gold Metal in pyrite concentrate koz 2,360
Gold Payable metal koz 4504,348
Silver Metal in pyrite concentrate koz  ......  Subscription required
Silver Metal in copper conc. koz  ......  Subscription required
Copper Concentrate kt  ......  Subscription required
Copper Metal in pyrite concentrate M lbs  ......  Subscription required
Copper Metal in copper conc. M lbs  ......  Subscription required
Pyrite Concentrate kt  ......  Subscription required

Operational Metrics:

Metrics
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
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Reserves at January 1, 2021:
Mineral Reserves are reported at an NSR cut-off of $120 per tonne.

Mineral Resources are reported based on an NSR cut-off which considers marginal mining costs, processing costs, and G&A costs totalling USD47/t.

CategoryTonnage CommodityGradeContained Metal
Probable 24,767 kt Gold 6.22 g/t 4,950 koz
Probable 24,767 kt Silver 34.4 g/t 27,386 koz
Probable 24,767 kt Copper 0.19 % 102,868 k lbs
Probable 24,767 kt Gold Equivalent 6.95 g/t 5,535 koz
Indicated 48,062 kt Gold 5.47 g/t 8,454 koz
Indicated 48,062 kt Silver 35.8 g/t 55,324 koz
Indicated 48,062 kt Copper 0.18 % 193,422 k lbs
Indicated 48,062 kt Gold Equivalent 6.35 g/t 9,818 koz
Inferred 27,343 kt Gold 4.06 g/t 3,571 koz
Inferred 27,343 kt Silver 25.9 g/t 22,754 koz
Inferred 27,343 kt Copper 0.18 % 107,281 k lbs
Inferred 27,343 kt Gold Equivalent 4.83 g/t 4,249 koz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold USD  ......  Subscription required *†
C1 cash costs 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 2021 study / presentation.
† Net of By-Product.
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Operating Costs:

Units2021
UG mining costs ($/t milled) USD 28 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2021 study.
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2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
UG OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 307
G&A costs $M USD 85
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
EBITDA (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 0% $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 12% $M USD  ......  Subscription required
After-tax NPV @ 0% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 12% $M USD  ......  Subscription required
After-tax IRR, % $M USD  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of January 1, 2021:
HME TypeModelSizeQuantity
Alimak climber ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
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....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 11, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 1, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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