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Brazil
Mara Rosa - Posse Project

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 Location:
4 km N from Mara Rosa, Brazil

  Project Contacts:
Praça Carlos Chagas 49 - Salas 504 à 506 Bairro Santo Agostinho
Belo Horizonte
Brazil
30170-020
Phone  ...  Subscription required
Fax+55-31-3261-5974
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageConstruction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life8 years (as of Jan 1, 2021)
Construction is underway, with the project having received all the necessary installation licenses from state authorities in Goias during 2021 and 2022.


Owners

Source:
CompanyInterestOwnership
Hochschild Mining Plc. 100 % Indirect
April 01, 2022 - Amarillo Gold Corporation completed the plan of arrangement (the “Arrangement”) transaction involving the acquisition of Amarillo by a subsidiary of Hochschild Mining PLC (“Hochschild”). Amarillo is now a wholly owned subsidiary of Hochschild.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Mesothermal
  • Vein / narrow vein


Summary:

The geology in the Mara Rosa District is principally delineated by three northeast striking, moderately to steeply northwest dipping belts of metamorphosed volcano-sedimentary and associated intrusive rocks. These belts, referred to as the Western, Central, and Eastern Belts, are separated by broad zones of tonalitic orthogneiss.

The Eastern Belt is bounded to the southeast by the Rio dos Bois fault, which also defines the southeastern limit of the GMA.

Amarillo’s land position within the Mara Rosa District primarily covers the Eastern Belt greenstone assemblage with some coverage of the Western and Central belts as well. The Eastern Belt, has a maximum thickness of 6 km, generally strikes to the northeast and dips moderately to steeply to the northwest. Surface topography is characterised by moderate relief and locally dissected drainages that follow lithologic or structural weaknesses. Depth to fresh bedrock is generally shallow, ranging from 0 to 15 m. The upper portion of the weathered profile consists of clay-rich latosol and saprolite derived from the underlying bedrock.

Rocks of the Eastern Belt are locally intruded by quartz-feldspar-muscovite and biotite granitic rocks and associated aplite and pegmatite dykes, small stocks and dykes of hornblende, biotite and magnetite diorite, and, in its north-central portion, a large body of hornblende-plagioclase gabbro. All units exhibit varying degrees of foliation that typically range from we ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Posse Gold Project is based on a mining concept that uses conventional drill, blast, load and haul techniques for all mining areas and rock types. One hundred per cent of the fresh rock and 30% of the saprolite will be blasted and loaded with excavators into 8x4 on-road trucks, and hauled to final destinations, i.e., primary crusher, low grade stockpiles or waste dumps. Direct mining will be applied to soft material such as soil and fill materials.

Specifically, primary mining will be undertaken by 74-t hydraulic excavators coupled with 45-t heavy tipper trucks.

A 15-month pre-stripping phase, between April 2021 and June 2022, was planned to ensure an initial supply of ore. During this stage the pit will require dewatering of the existing pit lakes. Water will be removed using a pumping system and directed to the planned water reservoir.

The ore and ore/waste contact materials will be mined in 5-m high benches for selectivity purposes, while double benches of 10-m high will be adopted for waste where there is no risk of dilution or ore loss.

The mining method will generate variable quantities of low grade that will require the use of stockpiles. Front-end loaders (FELs) will provide RoM feed and stockpile re-handling.

The mined waste will be distributed into six waste dumps.

The mined materials will be transported along roads cut through the mining area to give a suitable gradient. Double-lane haul roads ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 84,482811
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Annual mining capacity  ......  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
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at June 15, 2020:
Mineral Reserves above an economic cut-off grade of 0.37 g/t Au
On this basis the cut-off grade for the mineral resource has been set at 0.35 g/t gold.

CategoryTonnage CommodityGradeContained MetalRecoverable Metal
Proven 11.8 Mt Gold 1.2 g/t 456 koz 410 koz
Probable 12 Mt Gold 1.16 g/t 446 koz 401 koz
Proven & Probable 23.8 Mt Gold 1.18 g/t 902 koz 811 koz
Measured 14 Mt Gold 1.2 g/t 510 koz
Indicated 19 Mt Gold 1.1 g/t 640 koz
Measured & Indicated 32 Mt Gold 1.1 g/t 1,200 koz
Inferred 0.1 Mt Gold 0.52 g/t 1.7 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD  ......  Subscription required&nbs
Total 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 2021 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2021
OP mining costs ($/t milled) USD 9.97 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 259.2
G&A costs $M USD 28.6
Total OpEx $M USD  ......  Subscription required
Total 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
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 8% $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
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of December 31, 2021:
HME TypeSizeQuantityLeased or
Contractor
Backhoe loader ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... 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 TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Pre-Feasibility Study Report 2018
Pre-Feasibility Study Report 2017
Pre-Feasibility Study Report 2011
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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