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Brazil
Matupa Project

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 Location:
11 km S from Guaranta do Norte, Brazil

  Project Contacts:
255 Giralda Avenue Suite 06W102
Coral Gables
Florida, United States
33134
Phone  ...  Subscription required
EmailEmail
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life7 years (as of Jan 1, 2022)
The Matupá project is located in the Juruena-Teles Pires Gold Province, specifically in the Peixoto de Azevedo District. Aura believes that further exploration at Matupá presents an opportunity to expand and grow mineral resources and, consequently, to expand the Project's LOM. The company has 62,505 hectares of mineral rights and plans to maintain aggressive exploration in the coming years.


Owners

Source: p. 23, 58, 63
CompanyInterestOwnership
Aura Minerals Inc. 100 % Indirect
Matupa Gold Project is 100% owned by Aura Minerals. The property was acquired through the merger with Rio Novo in 2018.

Contractors

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Deposit Type

  • Porphyry
  • Intrusion related


Summary:

The Alta Floresta Gold Province (“AFGP”) is located in the south-central portion of the Amazon Craton (Almeida, 1978; Almeida et al., 1981), a crustal segment north of South America that would have stabilized at 1.0 Ga, which is surrounded by the mobile Neoproterozoic mobile belts of Tucavaca (in Bolivia), Araguaia-Cuiabá (Central Brazil) and Tocantins (northern Brazil) (Almeida et al., 1976; Cordani et al., 1988; Tassinari & Macambira, 1999). As the AFGP covers an area of approximately 430,000 km2, it represents one of the largest cratonic regions on the planet, comprising two Precambrian shields: Central Brazil (or Guaporé) and Guiana shields, that are separated by the Paleozoic Solimões-Amazonas(Tassinari) basin (Macambira, 1999; Dardene &Schobbenhaus, 2000; Tassinari et al., 2000).

The Alta Floresta Gold Province (AFGP) is mostly comprised of plutono-volcanic sequences generated in paleo- and mesoproterozoic continental arcs, in addition to deformed and metamorphic units in restricted greenschist facies to its central and northwestern portions. The units that comprise the province, especially its eastern segment, are essentially represented by oxidized calcium-alkaline plutonic and volcanic rocks, of medium to high potassium (K), meta- to peraluminous, belonging to the magnetite series (type I granites). of volcanic, sub-volcanic and alkaline granitoids (type A granites).

According to Assis (2015), in general, these units can be grouped into four ma ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining operation concept for the Matupá Project is conventional open pit mining with a production schedule that provides an initial 0.4 Mt stock of ROM with 0.93 g/t Au content, equivalent to three months production. For commissioning purposes the Low-Grade ore will also be available as process plant feed.

The mine development is planned to allow access to those grade levels required to maximize gold production and provide operational flexibility by mining several benches simultaneously.

The waste rock comprises soil, saprolite, altered rock mass, and fresh rock. The planned excavation of these deposits is to drill and blast, with explosives, all fresh rock and 30% of saprolite. Load and haulage will be performed mainly by hydraulic excavators, backhoe configuration, a complement of front-end loaders, and on-road transportation by a fleet of trucks (vocational).

• A minimum mining width of 30 m on a 10 m-high bench has been used. The X1 pit will include a final bench access incorporating an operational mining width of 15 m to maximize access to the mineralized zone.
• The waste and ore benches will be mined as 5 m thick layers, leaving a designed 10 m maximum bench height.
• The ore and waste zones have been analyzed and it is possible to operate with a proper berm width and in-pit dumping operational space.
• The benches will have a slight decline from crest to the toe for the upper bench face slope, in the direction o ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 41,889293,226
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at August 31, 2022:
The Mineral Reserve Estimate is based on an updated optimized shell using US$1,500/oz gold price, average dilution of 3%, mining recovery of 100% and break-even cut-off grades of 0.35 g/t Au for X1 pit.
The base case cut-off grade for the estimate of Mineral Resources is 0.35 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 3,799 kt Gold 1.31 g/t
Probable 4,686 kt Gold 0.99 g/t
Proven & Probable 8,485 kt Gold 1.13 g/t 293,000 oz
Measured 4,692,520 t Gold 1.14 g/t 172,000 oz
Measured 4,692,520 t Silver 3.85 g/t 580,810 oz
Indicated 4,653,150 t Gold 0.96 g/t 143,600 oz
Indicated 4,653,150 t Silver 4.39 g/t 656,430 oz
Measured & Indicated 9,345,670 t Gold 1.05 g/t 315,600 oz
Measured & Indicated 9,345,670 t Silver 4.12 g/t 1,238,240 oz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD  ......  Subscription required&nbs
All-in sustaining costs (AISC) Gold USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2022
OP mining costs ($/t milled) USD 3.84 *
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Working capital $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 138.5
Refining costs $M USD  ......  Subscription required
G&A costs $M USD 15.4
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
Net Income (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Water Supply

The water pump system selected is driven by diesel engine (so called "Moto-Bomba"), with 200 m3 /hour water pumping capacity at 50 HP for the rainwater drainage system in the mine pit. The system was quoted and included in capital costs. The pumping system is scheduled to start operating in the beginning, in the first year of mining operation, and will be able to accommodate the rainwater pump drainage system needs during all the pit Life of Mine (LOM).

The necessary pipes calculated for the rainwater pumping system, to pump the rainwater from the mine pit to the water treatment station, reached a length of 600 meters, using 6 inch diameter pipes.

RAW WATER
An estimated 25 m3 /h of raw water will be consumed in the processing plant. Such a flowrate will be pumped from the Porcão River, which is located close to the future industrial installations. The raw (make-up) water characteristics of low salinity, low conductivity, and low particulate solids are particularly suited to be used in the following applications:
• Pump sealing;
• Mill system sealing;
• Cooling the mill's hydraulic system;
• Preparing reagents;
• Carbon acid washing and elution;
• Safety devices such as eye washing;
• Dust suppression;
• Sprinkler and hydrant fire preventing systems; and
• Safety showers and other similar applications.

RECIRCULATE WATER
The majority of water consumed in the processing plant is designed to derive from recirculation within the industrial installation. Accordingly, a calculated 206 m3 /h water flow rate obtained from tailing thickening and filtering will recirculate to supply mainly the grinding stage.


Proposed Heavy Mobile Equipment as of August 31, 2022:
HME TypeModelSizeQuantityLeased or
Contractor
Dozer (crawler) ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 31, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Aug 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 2, 2023
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Feasibility Study Report 2022
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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