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Australia
McPhillamys Project

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 Location:
8 km NE from Blayney, New South Wales, Australia

  Project Contacts:
57 Adelaide Street
Blayney
New South Wales, Australia
2799
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life10 years (as of Jan 1, 2021)
Regis continues to have constructive engagements with all levels of government and positive progress has been made on several fronts regarding permitting associated with the project. The Definitive Feasibility Study (DFS) is also progressing and will be finalised once the NSW Department of Planning, Industry and Environment makes a recommendation on the project.


Owners

Source: p. 32
CompanyInterestOwnership
Regis Resources Ltd. 100 % Indirect

Contractors

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Deposit Type

  • Volcanic hosted


Summary:

The McPhillamys gold deposit lies along one of a series of north-south trending splays/horsetail structures that occur at the inflection of the Godolphin-Copperhania Fault Zone where the orientation changes from NNW-SSE to SSW-NNE. The splays are defined by strong shearing and faulting and continue to the south for over 6km. The deposit is hosted by dacite- rich volcaniclastic rocks of the Silurian-aged Anson formation which vary in composition from crystal tuffs to agglomeratic, matrix-supported accretions.

Gold mineralisation is associated with strongly sheared volcaniclastics with strong quartz- carbonate-sericite-pyritepyrrhotite alteration. The gold mineralisation trends roughly north-south over a strike distance of 900m and dips steeply east at 70º to 80º to the east.


Mining Methods

  • Truck & Shovel / Loader


Summary:

A conventional load and haul mining method has been selected for the development of the MGP. Open pit mining activities are expected to be conducted by an experienced third-party earthmoving contractor.

All mining is proposed to take place 24 hours per day, 7 days per week using conventional excavators and haul trucks as used in open pit gold mining operations world-wide. The mineralised ore profile will be mined in benches of between 2.5 and 5.0 metres for grade and selectivity considerations. The ore boundaries will be determined by grade control drilling.

Allowance has been made in the mining schedule to blast 70% of the oxide domain (excluding clay zone defined as free dig) and 100% of the transitional and fresh domains prior to load and haul of the material to the waste dumps, low grade stockpile or ROM.

The single open pit will be mined in two stages to assist in reducing total earthmoving production requirements and in particular the first two years of operation. Additional detailed scheduling will be required to further optimise material movement and manage the estimated 20 to 25% of Potentially Acid Forming (PAF) waste material contained within the pit.

Pit slope design parameters have been developed to a level of confidence suitable for DFS level design. Based on the structural and geotechnical interpretations, a range of likely controlling slope failure mechanisms have been proposed, from bench-scale up to inter-ramp and ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 192,0001,728,264
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio 4.29 *
Waste tonnes, LOM 91,600,000 bcm *
Ore tonnes mined, LOM 21,300,000 bcm *
Total tonnes mined, LOM 112,900,000 bcm *
Tonnes milled, LOM 60.1 Mt *
Annual milling capacity 7 Mt *
Annual ore mining rate 7 Mt *
* According to 2017 study.

Reserves at December 31, 2020:
Resources are reported at cut-off grade 0.4 g/t Au.
Reserves are reported at cut-off grade not less than 0.4 g/t Au, that vary according to oxidation and lithology domains.

CategoryTonnage CommodityGradeContained Metal
Probable 61 Mt Gold 1 g/t 2,020 koz
Indicated 69 Mt Gold 1 g/t 2,280 koz
Inferred 1 Mt Gold 0.6 g/t 10 koz
Total Resource 70 Mt Gold 1 g/t 2,290 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold AUD 918.57 / oz *  
All-in sustaining costs (AISC) Gold AUD 990 / oz *  
Assumed price Gold AUD 1,600 / oz *  
* According to 2017 study / presentation.

Operating Costs:

Units2017
OP mining costs ($/t milled) AUD 15.5 *
Processing costs ($/t milled) AUD  ......  Subscription required
G&A ($/t milled) AUD  ......  Subscription required
Total operating costs ($/t milled) AUD  ......  Subscription required
* According to 2017 study.
Subscription required - Subscription is required.

2017 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscription required
OP OpEx $M AUD  ......  Subscription required
Processing OpEx $M AUD 613.6
G&A costs $M AUD 45.3
Total OpEx $M AUD  ......  Subscription required
Gross revenue (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 5% $M AUD  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 10, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Aug 10, 2022
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Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Press Release 2017
Annual Report 2016
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