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Australia
Carrapateena Expansion Project (Carrapateena)

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 Location:
63 km E from Woomera, South Australia, Australia

  Project Contacts:
2 Hamra Drive,Adelaide Airport
Adelaide
South Australia, Australia
5950
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Overview

StageConstruction
Mine TypeUnderground
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Block caving
  • Sub-level caving
Production Start...
Mine Life2045
The Carrapateena Block Cave expansion was approved by the OZ Minerals Board in February 2021 and construction of Block Cave decline commenced.

OZ Minerals has announced that the Carrapateena cave safely propagated to surface on December 29, 2022, marking the transition from development to production planning at the operation in South Australia.

Progress was also made on Carrapateena’s transition from a Sub-Level Cave to a Block Cave. Converting the bottom half of the Sub-Level Cave to a Block Cave will unlock Carrapateena’s potential to be a multigenerational, low quartile cash cost producing province. The base case is for Carrapateena to reach a production rate of 12Mtpa from 2028. Block Cave 1 will almost double current average production to ~110 120ktpa of copper and 110-120koz of gold.


Owners

Source: p. 107
CompanyInterestOwnership
OZ Minerals Ltd. 100 % Indirect
OZM Carrapateena Pty Ltd is a wholly owned subsidiary Oz Minerals Ltd.

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • IOCG


Summary:

The Carrapateena Project is located within the highly prospective Olympic Dam copper-gold (Cu-Au) Province. This is a metallogenic belt along the eastern margin of the Gawler Craton in South Australia, which hosts the Prominent Hill Mine, Olympic Dam mine and the Moonta-Wallaroo historic mining district. The Craton comprises variably deformed and metamorphosed sedimentary, volcanic and plutonic rock, spread from the late Archean to Mesoproterozoic, and it has been subdivided into a series of domains – the Carrapateena deposit being part of the Olympic Domain. The age of the iron oxide copper gold (IOCG) mineralisation in the Gawler Craton is uncertain, though it is interpreted in the literature to be associated with Mesoproterozoic magmatism of the Hiltaba Suite and the Gawler Range Volcanics.

The Carrapateena copper-gold mineral deposit is hosted in a brecciated granite complex, with both bornite and chalcopyrite copper mineralisation present – the bornite being a distinct higher grade zone of mineralisation.

The vast majority of copper and gold mineralisation within the deposit is hosted by hematite-dominated breccias with moderate mineralisation occurring within hematite altered granite breccias (Eastern Cu domain). Sulphides are the primary copper-bearing minerals in the Carrapateena Breccia Complex. Copper and gold mineralisation is structurally and chemically controlled, with subsequent alteration destroying mineralising structures. The most ab ........


Mining Methods

  • Block caving
  • Sub-level caving


Summary:

The Carrapateena Block Cave Expansion Pre-Feasibility Study (the Pre-Feasibility Study) focused on the opportunity to realise further value from the Carrapateena copper-gold Mineral Resource. This executive summary focuses on the Pre-Feasibility Study for transitioning the sub-level cave to Block Cave 1 (BC1) and then later into Block Cave 2 (BC2).

Proposed Mine Expansion
The Pre-Feasibility Study demonstrates that the Carrapateena Block Cave Expansion can be constructed without impeding the operation of the sub-level cave, and without requiring major rework of the sublevel cave underground infrastructure, ensuring project delivery and return on the sub-level cave base case. The mine expansion and transition to BC1 would require adjusting the location of future underground infrastructure below Crusher Station 2, including a change in orientation of the decline, conveyor and ventilation, however, this is not due for installation until after 2022. The proposed access decline would be a common sub-level cave or block cave decline in 2022, switching to a dedicated block cave decline in 2023. This approach provides optionality to make the best decision for either continuing the sub-level cave or final investment decision in the Carrapateena Block Cave Expansion in 2023, based on performance of the sub-level cave and market conditions at that time.

Carrapateena Block Caves
The Pre-Feasibility Study recommends a transition from the sub-level ca ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnitsAvg. Annual
Copper kt 115
Gold koz  ......  Subscription required
All production numbers are expressed as metal in concentrate.

Operational Metrics:

Metrics
Ore tonnes mined, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at June 30, 2021:

CategoryTonnage CommodityGradeContained Metal
Probable 210 Mt Copper 1.1 % 2,300 kt
Probable 210 Mt Gold 0.44 g/t 3,000 koz
Probable 210 Mt Silver 4.3 g/t 30 M oz
Probable 210 Mt Copper Equivalent 1.3 %
Measured 130 Mt Copper 0.96 %
Measured 130 Mt Gold 0.42 g/t
Measured 130 Mt Silver 3.6 g/t
Indicated 490 Mt Copper 0.62 %
Indicated 490 Mt Gold 0.26 g/t
Indicated 490 Mt Silver 2.9 g/t
Inferred 330 Mt Copper 0.32 %
Inferred 330 Mt Gold 0.16 g/t
Inferred 330 Mt Silver 2 g/t
Total Resource 950 Mt Copper 0.56 % 5,400 kt
Total Resource 950 Mt Gold 0.25 g/t 7,500 koz
Total Resource 950 Mt Silver 2.7 g/t 82 M oz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Copper USD  ......  Subscription required *†
C1 cash costs Copper USD  ......  Subscription required *†
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
† Net of By-Product.

Operating Costs:

Units2020
UG mining costs ($/t milled) AUD 9 *
Processing costs ($/t milled) AUD  ......  Subscription required
G&A ($/t milled) AUD  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Expansion CapEx $M AUD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscription required
After-tax NPV @ 8.5% $M AUD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 6, 2023
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
Technical Report 2017
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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