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Australia
Halls Creek Mine

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 Location:
35 km SW from Halls Creek, Western Australia, Australia

  Address:
Level 2, 46 Ventnor Ave, West Perth
Perth
Western Australia, Australia
6005
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Airleg stoping
  • Mechanized Cut & Fill
  • Bench stoping
Production Start...
Mine Life5 years (as of Jan 1, 2021)
The Halls Creek Project includes the Nicolsons Mine, (45 km south west of Halls Creek) and a pipeline of exploration and development prospects located east of Halls Creek in the Kimberley Region of Western Australia.

January 4, 2023
• Operational review complete. Capital development to be suspended pending improvement in market operating conditions.
• Ore development to be completed on levels underway. Mining and stope production of developed ore to continue during next 6 months.
• Mine to be placed on care and maintenance ahead of recommencement of operations. Substantial underground and open pit Ore Reserves remain in-situ at the mine.


Owners

Source: p. 107
CompanyInterestOwnership
Pantoro Ltd. 100 % Indirect

Contractors

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Deposit Type

  • Orogenic
  • Vein / narrow vein


Summary:

Gold mineralization in the Nicolson’s Find area is structurally controlled within the 400 m wide NNE trending dextral strike slip Nicolson’s Find Shear Zone (NFSZ) and is hosted within folded and metamorphosed turbiditic greywackes, felsic volcaniclastics, mafic volcanics and laminated siltstones and mudstones. This zone forms part of a regional NE-trending strike slip fault system developed across the Halls Creek Orogen (HCO).

The NFSZ comprises a NNE-trending anastomosing system of brittle-ductile shears, characterised by a predominantly dextral sense of movement. The principal shear structures trend NNE to N-S and are linked by NW, and to a lesser extent, by NE shears. Individual shears extend up to 500m along strike and overprint the earlier folding and penetrative cleavage of the HCO.

The overall geometry of the system is characterized by right step-overs and bends/jogs in the shear traces, reflecting refraction of the shears about the granite contact. Within this system, the NW- striking shears are interpreted as compressional structures and the NE striking shears formed within extensional windows. Mineralization is primarily focussed along NNE trending anastomosing systems of NNE-SSW, NW-SE and NE-SW oriented shears and splays. The NNE shears dip moderately to the east, while the NW set dips moderately to steeply to the NE. Both sets display variations in dip, with flattening and steepening which result in a complex pattern of shear inter ........


Mining Methods

  • Airleg stoping
  • Mechanized Cut & Fill
  • Bench stoping


Summary:

Mining continued at both Nicolsons and Wagtail underground mines during the period. There was no open pit mining undertaken.

Nicolsons Underground Mine
Nicolsons underground mine is located adjacent to the Nicolsons processing plant and has continued to be the cornerstone of production at the operation. Development has progressed to approximately 380 metres below surface at the time of reporting.

At Nicolsons Mine, the primary ore zones in the high-grade Johnston Lode were mined out in the first half of the year, with remnant mining continuing in other areas of the mine. Mining of remnant ore is expected to be completed during the 2023 financial year.

Wagtail Underground Mine
Wagtail is located adjacent to the Nicolsons Underground Mine. Pantoro commenced mining Wagtail (and the nearby Rowdies mine) as open pit operations in October 2016.

At Wagtail, operations have continued to be advanced in the Rowdies Lodes which include the high grade REV and Wagon structures discovered during the previous year. In addition, development has now reached the Wagtail South orebody, adding a major work area for the coming year. The additional ore available from the Wagtail South orebody provides a platform for the mine to continue to produce at similar levels to those achieved during the past several years.

The Wagtail South surface ventilation raise bore was completed in early July 2022, after a protracted delay in mob ........


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2022202120202019
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2022202120202019
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required249,486 t
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required213,845 t
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Reserves at May 31, 2022:
Mineral Resources:
- Nicolsons Underground (3.0 g/t cut-off grade applied to stoping, 1.0 g/t cut-off grade applied to development);
- Wagtail Underground (2.8 g/t cut-off grade applied to stoping, 1.0 g/t cut-off grade applied to development);
- Open Pits (0.6 g/t cut-off grade applied).

CategoryTonnage CommodityGradeContained Metal
Proven 263 kt Gold 7.4 g/t 62 koz
Probable 285 kt Gold 5.2 g/t 48 koz
Proven & Probable 549 kt Gold 6.3 g/t 110 koz
Measured 383 kt Gold 9.4 g/t 115 koz
Indicated 584 kt Gold 6.2 g/t 116 koz
Inferred 353 kt Gold 4.7 g/t 53 koz
Total Resource 1,320 kt Gold 6.7 g/t 284 koz

Financials:

Units2022202120202019
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 27, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Press Release 2014
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