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Australia
Northern Operations (Otter Juan/Durkin North and Long) Mine (Kambalda Nickel Operation)

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 Location:
60 km S from Kalgoorlie, Western Australia, Australia

  Address:
Level 1 / 8 Richardson Street
PO Box 1810
West Perth
Western Australia, Australia
6005
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Nickel
  • Copper
Mining Method
  • Longhole stoping
  • Avoca
  • Longitudinal stoping
  • Cemented backfill
Production Start...
Northern Operations is part of Kambalda Nickel Operations (“KNO”) and consist of Durkin North (to be accessed via the Otter Juan mine) and Long.

During FY2022, Mincor successfully completed construction and commissioning programs at the Northern Operations.

First development ore was extracted from the Northern Operations in December 2021. The first stope was fired in the 495 Level at Durkin North in June 2022.

First processing of ore from KNO was achieved in May 2022, sourced from a steady build up of development ore stockpiles delivered to the concentrator between February and early May 2022, resulting in the first revenue in June 2022.
Latest NewsMincor Hits Outstanding New High-Grade Intercepts at Northern Operations     January 19, 2023


Owners

Source: p. 9,69
CompanyInterestOwnership
Mincor Resources NL 100 % Indirect
Northern Operations are 100% owned by Mincor.

Contractors

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Deposit Type

  • VMS


Summary:

There are two mining areas in the Durkin North mine plan, being the D1/D2 area and the D3/D5 area. The D1/D2 area strikes predominantly east-west with a strike length of ~550m, extending from ~-85mRL (~420 mbs) to -260mRL (175m extent). This area gently plunges to the north resulting in a long strike over a relatively small vertical extent. The orebody in D1/D2 is generally narrow (1-3m), with one main lode and a small hangingwall splay in the southern area. The orebody dips to the north, with dips ranging from relatively shallow dipping (down to 45° in parts) up to 75°. The D3/D5 area strikes southeast/northwest with a strike length of ~380 m, extending from -270mRL to -450mRL (180 m extent). The plunge in this area tends to vertical. Dips are generally steeper than D1/D2, ranging from 65-80° to the north-east. The D3/D5 area contains several closely spaced economically extractable lodes in parallel, with widths 1-3m.

The Long Mineral Resource generally strikes northwest-southeast. The Mineral Resource is spread out over an extensive area. Ore pod strike lengths are variable, ranging from 20-30m to ~500m. Some areas dip steeply and continuously to the north-east at approximately 70-80°, while other ore pods are flat dipping at 15-25°. The orebody is generally less than 2m thick.


Mining Methods

  • Longhole stoping
  • Avoca
  • Longitudinal stoping
  • Cemented backfill


Summary:

The Durkin North mine is planned to be accessed both through the existing Long mine and the existing Otter mine. Both mines are accessible and require minimal rehabilitation. The Durkin North access decline will be developed from both sides and will connect Long and Otter when broken through. The Long designs are all located within the existing Long capital development. Long orebodies will initially be accessed through the Long-Victor portal. Once the Durkin decline has broken through, all access will be via the Otter portal, as this provides a shorter haul distance than the Long-Victor portal with additional ventilation benefits.

Based on the orebody spatial and geotechnical characteristics, the primary mining method proposed is bottom-up longitudinal longhole stoping (LHS) with modified Avoca assuming cemented rockfill (CRF). This mining method requires minimal capital and development and provides void support for dilution mitigation.

Vertical sub-level intervals are 14-16m floor-to-floor, allowing good drill and blast control. Areas without top access (i.e. crown stopes or levels directly beneath sill pillars) will be mined using conventional longhole open stoping, retaining in-situ pillars for support. Maximum open stope strike lengths of 20m have been applied based on geotechnical studies. Slots to open stoping spans have been designed assuming handheld development methods. Subsequently mined stopes in filled levels will be fired against fresh CRF w ........


Crushing and Grinding


Processing

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Summary:

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Production:
Long nickel operation was transitioned to care and maintenance in June 2018.

CommodityUnits201820172016LOM (Projected)
Nickel t 5,8558,4338,49318,600
Copper t  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.
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Operational Metrics:

Metrics201820172016
Ore tonnes mined 181,822 t205,372 t215,337 t
Tonnes milled 181,822 t205,372 t215,337 t

Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Probable 872,000 Mt Nickel 2.48 % 21,600 t
Measured 2,000 t Nickel 6.9 %
Indicated 1,645,000 t Nickel
Inferred 488,000 t Nickel
Total Resource 2,135,000 t Nickel 4.2 % 89,400 t

Commodity Production Costs:

Commodity20182017
† Net of By-Product.

Financials:

Units201820172016
Revenue M AUD 64.8   70.5   63.9  
Pre-tax Income M AUD 1.4   0.7   -3.5  



Heavy Mobile Equipment as of January 25, 2022:
HME TypeQuantityLeased or
Contractor
Drill jumbo (single boom) ....................... Subscription required Leased
Scoop Tram ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

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

NewsDate
Mincor Hits Outstanding New High-Grade Intercepts at Northern Operations January 19, 2023

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