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Australia
Mt Carrington Project

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 Location:
65 km W from Casino, New South Wales, Australia

  Project Contacts:
12 Anderson Street
Ballarat
Victoria, Australia
3350
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePre-Feasibility
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
  • Zinc
  • Copper
Mining Method
  • Truck & Shovel / Loader
Mine Life5 years (as of Jan 1, 2020)
In May 2022, White Rock Minerals and Thomson Resources Ltd announced the finalisation and execution of a variation to amend the original Earn-in and JV Agreement entered into on May 1, 2021.

White Rock is free-carried through the exploration earn-in period. Thomson will continue management of the Project and will have sole responsibility for keeping the Project in good standing and funding the operational site care and maintenance costs (major capital items to be borne in equal shares by both companies) until formation of the Joint Venture, be that on a 51:49 or 70:30 basis.


Owners

Source: p. 25
CompanyInterestOwnership
White Rock Minerals Ltd. 100 % Indirect
The Mt Carrington Project comprises 22 Mining Leases and one Exploration Licence. All tenements are held 100% by White Rock (MTC) Pty Ltd, a wholly owned subsidiary of White Rock Minerals Ltd. No farm-in or farm-out agreements are applicable. The Mt Carrington Project is subject to a binding 3 stage Earn-In and Option to Joint Venture Agreement with Thomson Resources Ltd.

Contractors

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Deposit Type

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


Summary:

The Mt Carrington deposits are hosted by the Drake Volcanics; a NW-trending 60km x 10km Permian bimodal volcano-sedimentary sequence within the Wandsworth Volcanic Group near the north-eastern margins of the southern New England Fold Belt.

The Drake Volcanics overlie or is structurally bounded by the Carboniferous to Early Permian sedimentary Emu Creek Formation to the east and bounded by the Demon Fault and Early Triassic Stanthorpe Monzogranite pluton to the west. The sequence is largely dominated by andesite and equivalent volcaniclastics, however basaltic through to rhyolitic facies stratigraphic sequences are present, with numerous contemporaneous andesite to rhyolite sub-volcanic units intruding the sequence. The Razorback Creek Mudstone underlies the Drake Volcanics to the east, and Gilgurry Mudstone conformably overlies the Drake Volcanic sequence. In addition, Permian and Triassic granitoid plutons and associated igneous bodies intrude the area, several associated with small scale intrusion-related mineralisation. The Drake Volcanic sequence and associated intrusive rocks are host and interpreted source to the volcanogenic epithermal Au-Ag-Cu-Pb-Zn mineralisation developed at Mt Carrington. The majority of the Drake Volcanics and associated mineralisation are centred within a large scale circular caldera with a low magnetic signature and 20km diameter.

The Strauss and Kylo deposits are low sulphidation epithermal vein type mineralisation that m ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

It has been assumed that the Strauss and Kylo deposits will be mined by open pit mining methods.

Slope parameters of 8m bench height is selected. The pit optimisations and pit designs were developed without considering the value of Inferred material to determine the ultimate pit limits. However, there is a relatively small amount of Inferred material that is within the final pit limits (approximately 12% of the total mill feed inventory).

The Whittle optimisations have resulted in the merging of the three deposits into a single final pit. However, there is still a starter pit for each deposit.

It is envisaged that a mining contractor will carry out the mining activities with technical and management direction from White Rock. The mine is planned to be operated over three discrete open pits each incorporating drill and blast, load and haul, and ore and waste management tasks.

The initial six-month pre-strip is also required before a continuous ex-pit ore supply can be assured. There is an historic low-grade stockpile from the previous mining operations (1987-1990) which requires removal as soon as practicable in order to help improve acid rock drainage management at the site. This historic low-grade stockpile material will be reclaimed and processed during the commissioning phase of the process plant. It is envisaged that reclaiming of this stockpile will commence about 3-4 months after the start of the pre-strip mining. The annual p ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 36166
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
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 2020 study.
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Reserves at June 22, 2022:
The Strauss and Kylo MRE uses a 0.35 g/t AuEq cut-off.

CategoryTonnage CommodityGradeContained Metal
Indicated 4.3 Mt Gold 1.37 g/t 191 koz
Indicated 4.3 Mt Silver 1.55 g/t 216 koz
Indicated 4.3 Mt Zinc 0.34 % 14.9 kt
Indicated 4.3 Mt Copper 0.06 % 2.5 kt
Inferred 1.7 Mt Gold 0.64 g/t 34 koz
Inferred 1.7 Mt Silver 1.69 g/t 91 koz
Inferred 1.7 Mt Zinc 0.3 % 5 kt
Inferred 1.7 Mt Copper 0.06 % 1 kt
Total Resource 6 Mt Gold 1.17 g/t 225 koz
Total Resource 6 Mt Silver 1.59 g/t 306 koz
Total Resource 6 Mt Zinc 0.33 % 19.8 kt
Total Resource 6 Mt Copper 0.06 % 3.5 kt
Total Resource 6 Mt Gold Equivalent 1.41 g/t 271 koz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold AUD  ......  Subscription required&nbs
C1 cash costs Gold AUD  ......  Subscription required&nbs
Assumed price Gold AUD  ......  Subscription required&nbs
* According to 2020 study / presentation.
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Operating Costs:

Units2020
OP mining costs ($/t milled) AUD 16.8 *
Processing costs ($/t milled) AUD  ......  Subscription required
G&A ($/t milled) AUD  ......  Subscription required
Total operating costs ($/t milled) AUD  ......  Subscription required
* According to 2020 study.
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2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscription required
Closure costs $M AUD  ......  Subscription required
Total CapEx $M AUD  ......  Subscription required
Total Taxes $M AUD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 8% $M AUD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of August 19, 2020:
HME TypeModelLeased or
Contractor
Truck (dump) ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 19, 2020
....................... Subscription required ....................... Subscription required Subscription required Aug 19, 2020
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Oct 7, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Press Release 2017
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