Overview
Stage | Pre-Feasibility |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 20 years (as of Jan 1, 2022) |
Pre-feasibility Study results for the project, which was completed in 2017, showed that it is capable of producing the world’s highest-grade iron product (70% Fe), making it the world’s leading undeveloped high-quality iron ore concentrate and pellet feed project. |
Source:
p. 1
Hawsons Iron Ltd (Hawsons or the Company) is pleased to advise that the purchase of Starlight Investment Company Pty Ltd’s (Starlight) 6.037 per cent interest in the Hawsons Iron Project Joint Venture has been completed to secure full beneficial ownership and control of the Project.
Contractors
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Summary:
The Hawsons Magnetite Project is situated within folded, upper greenschist facies Neoproterozoic rocks of the Adelaide Fold Belt. The Braemar Facies magnetite ironstone is the host stratigraphy and comprises a series of narrow, strike extensive magnetite-bearing siltstones generally with a moderate dip. The airborne magnetic data clearly indicates the magnetite siltstones as a series of parallel, narrow, high amplitude magnetic anomalies. Large areas of the Hawsons prospective stratigraphy are concealed by transported ferricrete and other younger cover. The base of oxidation due to weathering over the prospective horizons is estimated to average 80m in depth.
The Hawsons project comprises a number of prospects including the Core, Fold, T-Limb, South Limb and Wonga deposits. Resource Estimates have been generated for the Core and Fold areas which are contiguous.
The depositional environment for the Braemar Iron Formation is believed to be a subsiding basin, with initial rapid subsidence related to rifting possibly in a graben setting eg the diamictites in the lower part of the sequence. A possible sag phase of cyclical subsidence followed with deposition of finer grained sediments with more consistent, as compared to the diamictite units, bed thicknesses, style and clast composition. The top of the Interbed Unit marks the transition from high to lower energy sediment deposition.
The distribution of disseminated, inclusion-free magnetite in the ........

Summary:
Mining is to be by conventional open pit methods of drill and blast followed by load and haul then finally In pit crushing and conveying has been adopted as the basis of the PFS, utilising large mining equipment comprising 800t diesel hydraulic shovels and 220t rigid dump trucks.
The mining method utilises truck and shovel for the pre-stripping and the early mine plan, while in pit conveying (IPC) is utilised in year five once meaningful depths have been reached. The plan is to use the conveyor for the vertical lift and the trucks for horizontal movement, maximising the use of comparatively cheap electrical power, reducing truck hours and improving safety. Following a prestrip of ~150mt, the life of mine (LOM) waste:ore ratio is 0.40, dropping to near zero by year 11.
A total of 1406mt of ore and 568mt of waste are mined post pre-stripping. A maximum mining rate of 152mtpa is achieved in year 7.
Overall pit wall slopes ranged from 45º to 55º, depending on wall orientation and lithology.
A minimum mining width of 100m was adopted, with 15m bench heights for optimisiation, design and mine planning.
Source:
Flow Sheet:
Summary:

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Projected Production:
Commodity | Units | Avg. Annual | LOM |
Iron (magnetite)
|
kt
| 10,000 | 201,000 |
All production numbers are expressed as concentrate.
Operational Metrics:
Metrics | |
Annual mining rate
| 98 Mt * |
Annual ore mining rate
| 70.4 Mt * |
Annual production capacity
| 10 M dmt of iron (magnetite) concentrate * |
Stripping / waste ratio
| 0.4 * |
Waste tonnes, LOM
| 717 Mt * |
Ore tonnes mined, LOM
| 1,423 Mt * |
Total tonnes mined, LOM
| 2,140 Mt * |
* According to 2017 study.
Reserves at July 31, 2022:
The Mineral Resource estimates are reported at a 6% DTR cut-off grade.
Category | Tonnage | Commodity | Grade | Contained Metal |
Measured
|
394 Mt
|
DTR
|
13.7 %
|
54 Mt
|
Indicated
|
1,576 Mt
|
DTR
|
12 %
|
190 Mt
|
Inferred
|
1,954 Mt
|
DTR
|
12.1 %
|
237 Mt
|
Total Resource
|
3,924 Mt
|
DTR
|
12.3 %
|
481 Mt
|
Commodity Production Costs:
| Commodity | Units | Average |
All-in sustaining costs (AISC)
|
Iron (magnetite)
|
USD
|
39.7 / dmt *
|
C1 cash costs
|
Iron (magnetite)
|
USD
|
33.1 / dmt *
|
Assumed price
|
Iron (magnetite)
|
USD
|
88.1 / dmt *
|
* According to 2017 study / presentation.
2017 Study Costs and Valuation Metrics :
Metrics | Units | LOM Total |
Initial CapEx
|
$M AUD
|
......
|
Sustaining CapEx
|
$M AUD
|
......
|
Closure costs
|
$M AUD
|
......
|
Total CapEx
|
$M AUD
|
......
|
After-tax NPV @ 10%
|
$M AUD
|
......
|
After-tax IRR, %
|
|
......
|
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Pipelines and Water Supply
Source:

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Proposed Heavy Mobile Equipment as of July 28, 2017:
HME Type | Size |
Shovel (hydraulic)
|
800 t
|
.......................
|
.......................
|
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Corporate Filings & Presentations:
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