Overview

Mine Type	Underground
Status	Active
Commodities	Nickel Copper
Mining Method	Longhole stoping Longitudinal stoping Avoca
Backfill type	...
Production Start	...
Snapshot	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. January 22, 2024 - Wyloo will temporarily shut down the Western Australian nickel mines due to low nickel prices. Wyloo will now put the Cassini, Long and Durkin mines into care and maintenance from May 31, 2024.

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

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Comminution

Crushers and Mills

Processing

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Production

Operational metrics

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Jan 28, 2024
.......................	.......................		Jan 28, 2024