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Australia
Iron Knob Mine

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 Location:
50 km NW from Whyalla, South Australia, Australia

  Regional Office:
Level 28, 88 Phillip Street
Sydney
New South Wales, Australia
2000
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Iron (hematite)
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life5 years (as of Jan 1, 2021)
Iron Knob Mining Area (IKMA) includes the Iron Monarch and Iron Princess pits (East Princess and West Princess) and Monarch scree pits.

SIMEC Mining placed the IKMA operations into care and maintenance on 1 July 2018. While other areas of the IKMA are in a care and maintenance phase, SIMEC Mining are proposing to undertake scree mining operations.


Owners

Source: p. 13
CompanyInterestOwnership
Gupta Family Group ("GFG") Alliance 100 % Indirect
SIMEC Mining (operator) 100 % Direct
Tenement holder and operator - OneSteel Manufacturing Pty Ltd (operating as SIMEC Mining). SIMEC Mining is a business of OneSteel Manufacturing Pty Ltd which is a company in the GFG Alliance.

Contractors

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Deposit Type

  • Alluvial / Placer
  • Banded iron formation
  • Metamorphic
  • Stratabound


Summary:

The Iron Knob mining area (IKMA) lies at the northern end of the Middleback Ranges (MBR).

• Hosted within the Palaeoproterozoic Hutchison Group metasediments.
• Mineralization is within the Lower Middleback Iron Formation grades upwards from Carbonate Haematite to Jaspilite Haematite facies.
• Ore Formation is considered through passive supergene enrichment of Magnetite Banded Iron Formations.
• Strongest Enrichment within the LMIF Carbonate Facies – leading to complete replacement of carbonates in highest grade zones.
• The Metasediments have a history of complex deformation dominated by East – West compression.
• Mineralised zones are bounded to the East and West regional scale North – South Shear Zones.
• Multiple Stages of Archean amphibolite dykes cross cut both deposits and are influence on mineralisation and Geotechnical Parameters.

Middleback Ranges Hematite
Hematite in the MBR occurs as stratabound Palaeoproterozoic deposits of the Lower Middleback Iron Formation (LMIF), part of the Hutchison Group. The Hutchison Group forms part of the Cleve Subdomain of the Gawler Craton, and lies on its western edge. The Cleve Subdomain comprises tightly folded high-grade metamorphic rocks that are mainly derived from marine shelf sediments and mafic and acidic volcanics (Parker, 2012b).

Middleback Ranges Framework In the MBR, the Hutchison Group is composed of the Warrow Quartzite and the Middleback Subgroup. ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Some areas of the Iron Knob Mining Area (IKMA) operations continue to be managed under care and maintenance, however the following operations occurred during the period (2021):
- Recovery and processing of low-grade stockpiles from Monarch Scree and waste rock dump's (WRD’s).
- Crushing and screening operations.
- Train loading operations.

SIMEC Mining placed the IKMA operations into care and maintenance on 1 July 2018. The decision to suspend operations at IKMA was a result of high production costs and ongoing low iron ore prices and part of SIMEC’s overall business response to this business environment. It was envisaged that mining operations would re-commence at some point following a sustained increase in the price of iron ore to a point at which the mine again becomes economically advantageous to operate.

While other areas of the IKMA are in a care and maintenance phase, SIMEC Mining are proposing to undertake scree mining operations.

Open cut mining methods will be used to Monarch Scree resources.

Mining of scree ore will supply feed to SIMEC’s Integrated Processing Facility (IPF). The scree ore will supplement the low-grade feed from dumps and on depletion of stocks, will replace the low-grade feed altogether. During Monarch Scree mining operations, feed to the IPF is expected to be approximately 135 wet mass kilotonnes per month. A significant stockpile of IPF feed (approximately 100 kilotonnes) will be main ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits202220212020
Iron (hematite) t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required
All production numbers are expressed as lump & fines. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Waste  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
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Reserves at December 31, 2021:

CategoryTonnage Commodity
Probable 14.5 Mt Iron (hematite)
Proven & Probable 14.5 Mt Iron (hematite)
Indicated 40.6 Mt Iron (hematite)
Inferred 21.5 Mt Iron (hematite)
Total Resource 62.1 Mt Iron (hematite)


Water Supply
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Heavy Mobile Equipment as of February 7, 2021:
HME TypeModelQuantityStatus
Bulldozer ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Dozer ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Loader (FEL) ....................... Subscription required ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required Proposed
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Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 22, 2023
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Feb 22, 2023
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Feb 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 22, 2023
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Year-end Mineral Reserves 2015
Corporate Presentation 2013
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