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Australia
Cassini Mine (Kambalda Nickel Operation)

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 Location:
108 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
Mining Method
  • Longhole stoping
  • Avoca
  • Longitudinal stoping
  • Cemented backfill
Production Start...
Cassini is part of Kambalda Nickel Operations (“KNO”).

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

First development ore was extracted from the Cassini in March 2022. The successful firing and extraction of the first production stope at the Cassini Nickel Mine in 29 November 2022.


Owners

Source: p. 1
CompanyInterestOwnership
Mincor Resources NL 100 % Indirect
Cassini is 100% owned by Mincor.

Contractors

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Deposit Type

  • VMS


Summary:

Cassini is located on the southern section of the Widgiemooltha Dome. The geology of the Widgiemooltha Dome and the area to the south consists of a thrust repeated sequence of basic ultramafic extrusive and intrusives, with intercalated sediments and acid volcanics with nickel sulphide orebodies found at the base of the ultramafic sequence.

The Cassini orebody as interpreted in the Mineral Resource is split into eight lodes, labelled CS2-CS9. From a mining perspective, the Mineral Resource has been delineated into two main areas based on spatial characteristics. These mining areas have been named by the dominant lode (CS2 or CS4).

The CS2 Area (CS2, CS3, CS6, CS7 and portion of CS5 lodes) consists of east-west trending parallel lodes, mainly offset, dipping at ~45° to the south with thickness from ~1m to ~7m, averaging 3m. The CS2 Area extends from ~260mRL (approx. 50mbs) to ~-240mRL (480m vertical extent). Grades and orebody thickness are inconsistent above ~75mRL.

The CS4 Area (CS4, CS8, CS9 and portion of CS5 Lodes) consists of parallel lodes striking northwest/southeast at ~125° and dipping at ~75-80° to the southwest. Average widths for the CS4, upper CS5 and CS9 lodes are 2-3m, with the CS5 lode thickening to 5-7m and up to 11m in parts below ~-250mRL (grades in this area also increase). The area extends from ~100mRL to -380mRL. Grades and thickness are inconsistent above ~10mRL.


Mining Methods

  • Longhole stoping
  • Avoca
  • Longitudinal stoping
  • Cemented backfill


Summary:

The Cassini mine will be accessed via a new box-cut and portal. The stope optimisation process showed that the economic portion of the Cassini orebody (commences from 250m below surface). Based on geotechnical analysis and the results of geotechnical drilling, the box-cut has been located ~700m to the south of the orebody where near-surface ground conditions are more favourable.

A twin decline system will be developed from the box-cut zone to the production zone, with access and return air declines excavated in parallel, allowing primary ventilation to be established early in the mine life. Ventilation and secondary egress will be via a raise system developed from the ventilation decline to the box-cut

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 development and provides void support for dilution mitigation. Vertical sub-level intervals are 15m floor-to-floor, allowing good drill and blast control. Areas with no 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 30m have been applied based on geotechnical studies. Slots to open stoping spans have been designed assuming handheld development methods. Subsequent ........


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnitsLOM (Projected)
Nickel t 35,300
All production numbers are expressed as metal in concentrate.


Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Probable 1,196,000 t Nickel 3.3 % 39,500 t
Indicated 1,287,000 t Nickel 4 %
Inferred 183,000 t Nickel 3.5 %
Total Resource 1,470,000 t Nickel 4 % 58,200 t



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
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....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Press Release 2022
Press Release 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Subscription required - Subscription is required.

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