ARDEA RESOURCES LIMITED — Investor Presentation 2021

Oct 4, 2021

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A globally significant source of nickel-cobalt and scandium in Western Australia

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Australian Nickel Conference

5 October 2021

Ardea Resources Limited

Kalgoorlie Nickel Project – the Location, Resource and Flowsheet for sustainable Critical Minerals supply

Disclaimer

Important notice

This presentation contains general information only and is, or is based upon, information which has been released to ASX or is contained in the Ardea Resources Limited (Ardea or the Company) prospectus dated 9 November 2016 (including supplementary prospectuses dated 18 November 2016 and 6 January 2017), the Goongarrie Nickel Cobalt Project Pre-Feasibility Study (dated 28 March 2018) the Goongarrie Expansion Study (24 July 2018), Goongarrie Pilot Plant trial produces battery grade crystals (31 October 2018), Goongarrie Nickel Cobalt Project Update (8 April 2019), Ardea Annual Report 2019 (24 October 2019), Ardea Quarterly Operations Report, for the quarter ended 31 March 2020 (9 April 2020), Quarterly Activities Report - June 2020 (23 July 2020), Nickel Sulphide Targets within the Ardea Tenement Portfolio including KNP (30 September 2020), Quarterly Activities Report - September 2020 (27 October 2020), Quarterly Activities Report - December 2020 (21 January 2021), GNCP High Grade Resource - 60 million tonnes at 1.0% nickel (15 February 2021), Quarterly Activities Report - March 2021 (21 April 2021), Basal contact nickel sulphide intersected at Ardea’s Emu Lake (27 April 2021), CSIRO/Ardea research at Goongarrie BTZ – insights for nickel sulphide and gold targets (27 May 2021), Kalgoorlie Nickel Project – Feasibility Study Underway (31 May 2021), Semi-massive nickel sulphide intercept at Emu Lake (10 June 2021), Highway Nickel Deposit - Mineral Resource Estimate (16 June 2021), Successful A$5.7M Capital Raising to Fund Kalgoorlie Nickel Project Feasibility Work (28 June 2021) Nickel Sulphide Exploration Update – Emu Lake (13 July 2021), Ardea Quarterly Operations Report, for the quarter ended 30 June 2021 (27 July 2021), Ardea Annual Report 2021 (24 September 2021).

This presentation is not an invitation, offer or recommendation (express or implied) to subscribe for, or apply for the purchase of, or to take any other action in respect of securities of any entity described herein and is not a prospectus, product disclosure statement or disclosure document for the purposes of the Corporations Act 2001 (Cth) and has not been lodged with ASIC. None of Ardea Resources Limited (Ardea or the Company) or its representatives are providing or offering investment advice or services by making this presentation.

Neither Ardea nor its representatives make any representation, warranty or guarantee of any kind, express or implied, as to the accuracy, completeness or reasonableness of the information contained herein or any other written or oral communication transmitted or made available to any person receiving this presentation. To the maximum extent permitted by law, Ardea and representatives expressly disclaim any and all liability based on or arising from, in whole or in part, such information, or any errors or omissions.

This presentation contains forward-looking statements regarding the Company’s resources, intentions and future business. These statements reflect current information, expectations, intentions and strategies regarding the future, and are subject to certain risks and uncertainties. Should one or more of these risks or uncertainties materialise, or should any of the underlying assumptions prove incorrect, actual results may vary from the expectations, intentions and strategies described in this presentation. Investors are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date they are made. Other than where required by law, the Company is under no obligation to revise any forward looking statement to reflect events or circumstances after the date of this presentation or to reflect the occurrence of unanticipated events.

The Goongarrie Project has completed the Pre-Feasibility Study phase and has commenced programs that are part of the Definitive Feasibility Study. Though reasonable care has been taken to ensure that the facts are accurate and/or that the opinions expressed are fair and reasonable, no reliance can be placed for any purpose whatsoever on the information contained in this document or on its completeness. Actual results and developments of projects and the market development may differ materially from those expressed or implied by these forward looking statements depending on a variety of factors. A key conclusion of the Pre-Feasibility Study and Expansion Study, which is based on forward looking statements, is that the Goongarrie Project is considered to have positive economic potential.

No stock exchange, regulation services provider, securities commission or other regulatory authority has approved or disapproved the information contained in this news release.

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Ardea Resources Corporate Overview

Board and Key Personnel

Kalgoorlie Nickel Project – Goongarrie Hub

Mathew Longworth Non-Executive Chair Andrew Penkethman Managing Director & CEO Ian Buchhorn Executive Director Sam Middlemas Company Secretary & CFO Alex Mukherji Manager Land Access & Compliance General Manager – Technical Mike Miller Services

Listed on ASX (ARL)

Shares on Issue 138,034,219 Performance Rights (ARFAJ) 4,667,000 Share Price $0.46 52 week high / low $0.63 / $0.40 Cash (as at 5 July 2021) $11 million Market Capitalisation $63 million Board and Management ~10% equity Top 40 Shareholders ~60% equity Research Petra Capital

• Globally significant Nickel, Cobalt and Scandium resource and other Critical Minerals

• Critical Minerals essential for green and sustainable technologies

• Located in Australia’s premier mining jurisdiction, Kalgoorlie-Boulder Western Australia

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Developing KNP – Australia’s next major Ni-Co project

Kalgoorlie Nickel Project ( KNP )

 There is no battery revolution without the development of strategic nickel laterite resources, such as the Kalgoorlie Nickel Project that can ensure sustainable and ethical mineral supply

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KNP – Building Blocks for success

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• World’s best operating jurisdiction

• Globally significant resource

• Premium goethite geo-metallurgy

• Enhanced flow sheet

• Proven technology

• Experienced team working with high quality partners

• Project development based on sustainable and ethical principles

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World’s best operating jurisdiction

• All Ardea Projects located in Western Australia (WA)

• 4,000km[2] ground position in Eastern Goldfields

• WA is the premier global destination for development

• of minerals operations

• City of Kalgoorlie-Boulder is the prime resource development and operating destination within WA

  • Very strong mining support from Local Government and Community

  • Multitude of world-class mining operations serviced from the City

  • Ardea maintains a local operations office and active stake holder engagement

  • Road and rail network pass through granted Goongarrie Hub mining leases

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World’s best operating jurisdiction

• Large contiguous KNP land holding – able to optimise site footprint

• Great Western Woodland amenable to low-impact development and rehabilitation

• Semi-arid environment, facilitates well managed tailings disposal  Rehabilitation procedures well defined by decades of Kalgoorlie open pit gold mining

• No ocean submarine tailings disposal

• No valley-fill tailings dams

• No active seismicity tailings dam issues

• No conflicting land use demands  KNP within a purely mining jurisdiction  No competing food production activity

• Low carbon future

• KNP HPAL neutraliser includes nickel enriched non-carbonate serpentine options

• Waste landform benefits regeneration agroforestry throughout the KNP

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Optimum location for sustainable

& ethical mineral supply

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Globally Significant Resource

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• Globally significant nickel & cobalt Mineral Resource

• Sustainable & ethical supply of nickel & Critical Minerals for low carbon future

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• Kalgoorlie Nickel Project ( KNP ) Feasibility Study ( FS ) scope covering Goongarrie Hub including satellite pits at Highway and Siberia North (Goongarrie Hub)

• The FS is evaluating the potential revenue contributions from mineralised neutraliser, scandium and other Critical Minerals, including Rare Earth Elements (REE) throughout the KNP

• Direct infrastructure links to the Kwinana Battery Hub

 KNP Mineral Resource 5.9Mt contained nickel and 384kt contained cobalt*

• 3.39kt scandium, from just Goongarrie deposits

• Pipeline of other Critical Minerals

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• See Appendix for resource breakdown and ASX release 16 June 2021

Understanding the Geo-metallurgy

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Matching the flowsheet to the mineralisation

Material Types Appraisal

• Comprehensive drilling, logging and assaying of all deposits

• Detailed multi-element assay suite (61 elements), including carbon balance

• XRD mineralogy for metallurgical performance

• Material Type controls and maximises resource utilisation

• High Pressure Acid Leach (HPAL)

• Atmospheric Leach (AL)

• Neutralisation (N)

Resource Utilisation

• Lateritised Alluvium -

• Lateritised Alluvium - site engineering requirements

• Clay Upper - goethite HPAL, base load hydrometallurgical feed  Enrichment Zone - goethite-asbolite high grade, 1% Ni - 0.1% Co, high Fe  Clay Lower - serpentine-nontronite (saprolite) AL feed, low Fe  Saprock - dolomite/magnesite Primary and Secondary Neut, high Mg

• Due to deep optimised pits at Goongarrie South, Clay Lower AL and Saprock Neutraliser recovered when accessing deep goethite-asbolite ore

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Enhanced flow sheet

• Premium goethite ore (excellent comminution, less abrasive, lower maintenance)

   - **MHP sale product during ramp up, in high demand**
  

  • Evaluating PCAM production through FBICRC membership

• Additional Critical Mineral by-products (current bench-scale metallurgy)

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Process Metallurgy

• High ore grade + slurry density = Lower Capex$ & Opex$ (best in Australia*)

• HPAL Ni & Co Extraction = Efficient, low energy intensity, proven “off-the-shelf”

• AL = Stability for acid plant (energy generation), maximises resource utilisation

• AL viable Ni extraction demonstrated in Vale Inco 2009 PFS

• Water Chemistry = Scale control & better uptime

• Water Options =Using pit drainage + pending licensed borefield

• MHP = Known technology & chosen feedstock for Lithium Ion Batteries

• See Slide 21 for data.

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Proven technology

Coral Bay HPAL Example

Ramp up rates

• HPAL chemistry is well known and has been applied successfully since the 1960s

• Single reactor

• Horizontal autoclave at Coral Bay built Train 1: 2005, Train 2: 2008

• At Coral Bay name plate production capacity exceeded in first year of production and thereafter

• Recovery of waste heat = Energy savings

• Owners built a sister plant at Taganito

• Annual scale cleaning – uptime >90%

• Minimal engineering extrapolation

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Coral Bay Ramp Up

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1.4
1.2
1
0.8
0.6
0.4
0.2
0
0 0.5 1 1.5 2 2.5 3
Production Year
Train 1 Train 2
Ni Prodn, % of Design
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The information on this slide is based on the Coral Bay HPAL process facility in the Philippines that is not an asset of Ardea, but is shown as an example of the successful implementation of HPAL technology.

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Proven technology

“Must Haves” for HPAL Success – all incorporated into the KNP FS

Good Materials Handling

• Well known resource

• Modular ore prep circuits no supply issues

• Design for high density slurry feed

Controlled Chemistry

• Feed blending & acid rate control

• Design to avoid HPAL “hot spots”

• Nano-filtration to give “soft” HPAL feed

• Atmospheric Leach to reduce neutraliser consumption

Good Heat Transfer

• Integrate acid plant into energy balance

• High density, high temperature HPAL feed

• Energy savings included at fundamental level

High Process Availability

• Modular approach, capacity & surge studies

• Proven materials of construction

• Proven vessel design rules, equipment selection

Subject to current review in Wood Engineering Gap Analysis

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Experienced team working with quality partners

Feasibility Study

• Gap Analysis Study Underway - Wood, international engineering consulting group

• Goongarrie Hub Hydrogeology Drilling underway – Rockwater & Harrington

• Goongarrie Hub Metallurgical Drilling completing – contractor DDH1

• Metallurgical Testwork – Program designed & drill core composites selected

Other Work Streams

• Future Battery Industry Co-operative Research Centre (FBICRC), active member

• CSIRO joint research projects in nickel

• Hylogger3 study underway for process mineralogy

• Completed CSIRO/Ardea research at Goongarrie BTZ – insights for nickel sulphide and gold targets, notably structural preparation and weathering depth

• Nickel Sulphide and other studies being assessed

Photograph right: Pump testing the Goongarrie Hub water extraction licence application covering the East Goongarrie Channel on granted Ardea Mining Lease tenure. A further licence application covers the base load Pamela Jean "pay-back" pit area, where the water is related to a major penetrative bedrock structure (that controls nickel laterite mineralisation to depths of up to 160m). Bedrock structures at Goongarrie tend to be better water quality than the adjoining palaeo-channels. The Goongarrie Hub pit areas require dewatering in any event ahead of mining.

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Project development based on sustainable & ethical principles

Low carbon footprint

• KNP Acid plant – Steam Power Block Flow Diagram

• Heat generated from on-site acid plant will be used for generating electrical power via steam turbines

• Indicative CO2 emissions – per kg of Ni metal equivalent production

• CO2 emissions from the KNP expected to be less than a third of those from Indonesian smelter nickel laterite operations

• KNP feasibility work aimed at further minimising CO2 emissions

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KNP DFS to continue to reduce CO2 emissions

KNP Murrin Murrin Ferronickel Nickel Pig Iron (Ni Content (Ni Content (30% Ni (10-15% Ni ~22%) >99.8%) content) content) from Laterite from Laterite from Laterite from Laterite Ore (HPAL) Ore (HPAL) Ore Ore (RKEF)

Source: Wei et al Energy Consumption and Greenhouse Gas Emissions of Nickel Products, 2020 and Ardea modelling.

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Investment Summary

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Ni Co Sc Mn
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Ardea’s KNP offers unrivalled nickel, cobalt and scandium scale optionalit y ( 5.9Mt of nickel and 384kt of cobalt ) Globally significant nickel-cobalt-scandium resource in an infrastructure-rich and stable jurisdiction, ability for sustainable and ethical* mineral supply

100% off-take is available . Company strongly leveraged to increasing battery-related nickel and cobalt demand

Highly prospective landholding in the Eastern Goldfields of Western Australia – confirmed with recent Ardea Emu Lake nickel sulphide discovery

WA-based Team with track record of exploration, development and production success

Well-funded to maintain momentum - upcoming news flow to include feasibility study, hydrogeology and metallurgy updates, nickel sulphide and Critical Mineral exploration

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For further information

Andrew Penkethman, Managing Director & CEO +61 8 6244 5136 ardea@ardearesources.com.au ardearesources.com.au

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A globally
significant
source of
nickel-cobalt
and scandium in
Western Australia
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For further information regarding Ardea, please visit www.ardearesources.com.au

APPENDICES

Nickel and the Inevitable Rise in Demand

• Demand for batteries is forecast to accelerate over the next decade as energy storage becomes critical to the transformation of energy systems

• KNP poised to supply nickel and cobalt to meet the inevitable and growing rise in demand

Global battery demand projected to 2030 (GWh pa)

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10x
9x
Source: Accenture report commissioned by the Future Battery Industries CRC, 2021
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Total primary nickel demand by first-use sector, 2020 to 2040 (kt Ni)

Notes: IRENA’s high scenario forecast used for ESS in Roskill projection. Growth rates in exhibit are compounding annual growth rates. Source: World Economic Forum (2019) A vision for a Sustainable Battery Value Chain in 2030; Roskill (2020) Lithium-ion Batteries: Outlook to 2029, 4th Edition; International Renewable Energy Agency (2017) Electricity storage and renewables: Costs and markets to 2030; International Energy Agency (2021) Global EV Data Explorer; Jager-Waldau (2019)Snapshot of Photovoltaics-February 2019; Accenture analysis.

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Experienced team working with quality partners

Board and Key Personnel

• Balanced financial and corporate experience, strong technical expertise in exploration, discovery, project

• development, metallurgical optimisation, compliance and operational management

Mathew Longworth Non-Executive Chair

33 years experience across exploration, project evaluation/development, operations and corporate management. Invaluable experience on the key Ardea exploration and development projects, being the KNP nickelcobalt-scandium deposits and Bardoc Tectonic Zone gold.

Andrew Penkethman Managing Director, CEO

Resources sector executive with over 25 years’ experience, including project evaluation, exploration, discovery, resource development, feasibility study management, permitting, stake holder engagement, mine development and operations management. ASX, TSX and AIM experience.

Ian Buchhorn Executive Director

Mineral Economist and Geologist with over 40 years’ experience. Lived and worked in the Eastern Goldfields for >20 years undertaking exploration, project evaluation and development. Operated as Registered Mine Manager in the Kalgoorlie Goldfields, City Councilor 1992 - 2006

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Sam Middlemas Company Secretary & CFO

Chartered Accountant (CA) with more than 30 years’ experience providing financial and corporate secretarial services.

Alex Mukherji Manager Land Access & Compliance

Extensive geological and environmental compliance reporting. Drafting and negotiating access and commercial agreements. Assessing business development opportunities. Corporate representation with stake holders, including State and Commonwealth agencies.

Mike Miller General Manager - Technical Services

Process Engineer with over 25 years’ experience in hydrometallurgical operations with a primary focus on nickel-cobalt production. Extensive study management experience with leading engineering firms.

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Project development based on sustainable & ethical principles

• Environmental Social and Governance (ESG) considerations at the forefront of the way in which Ardea does business

• Project designs and work practices based on ensuring the Company minimises green-house gas emission to ensure responsible sourcing of nickel and Critical Mineral supply

• Ardea enjoys strong support from the communities in which we operate

• Ardea has a Native Title Agreement in place for development of KNP

• Ardea has initiated an education fund to assist children in the Eastern Goldfields of WA

• The Ardea team comprises over 31% female participation, all in key management roles, and the Company is a strong advocate for gender equality and fair representation for all community groups

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KNP Superior HPAL Intensity

• Good ore grade + good slurry density = Lower capex & opex $$

• Atmospheric leach = stable operation, utilizes saprolite resource

• MHP Product = known technology & good market acceptance

Operating data from Australian HPAL Producers

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Performance Driver	Ardea	Bulong	Cawse	Murrin	RNO^	Metric	Ardea Rank	Comment
Atmospheric Leach	Yes	No	No	No	Yes	-	#1	Stable operation and full resource utilisation
HPAL Feed Density	42-44%	31%	35%	38%	42%	% Solids	#1	The higher the better = Maximises plant throughput
Residence Time	45-60	75	105	90	60	minutes	#1	The lower the better = Maximises plant throughput
Slurry Grade Ni	4.82	2.89	3.07	3.87	7.39	Ni kg/m3	#2	The higher the better = Increased revenue stream
Slurry Grade Co	0.88	0.23	0.24	0.34	0.31	Co kg/m3	#1	The higher the better = Strategic Co-Product credits

Data Sources

Ardea – Goongarrie Hub testwork results from PFS and Expansion Study, ASX release 28 March 2018 & Goongarrie Expansion Study, 24 July 2018. Bulong, Cawse, Murrin - ALTA 1999, An Engineering Comparison of the Three Treatment Flowsheets In WA Nickel Laterite Projects. RNO – ALTA 2001, Observations from the RNO Pilot Plant at Lakefield Research, 2000 AD.

^Ravensthorpe Nickel Operation (RNO) figures based on design numbers on upgraded beneficiated ore from the Halleys Deposit which has since been mined out. Ardea data is based on non-beneficiated material (with always an option to beneficiate selected KNP geo-met types, notably at Highway & Goongarrie Hill).

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A High-Quality Nickel and Cobalt Project

Outstanding results delivered from PFS* and Expansion Studies:

	1.0Mtpa	1.5Mtpa	2.25Mtpa
Status	PFS	PFS	ES
No. Trains	1	1	1
Pre Tax NPV8	US$ 1.13 billion	US$ 1.52 billion	US$ 2.4 billion
Pre Tax IRR	29 %	29 %	31%
CAPEX C1 cash cost	US$ 472 million US$ 0.42 / lb	US$ 588 million US$ 0.45 / lb	US$918 million US$ (0.34) / lb
Payback	5.3 years	5.6 years	5.1 years
Cobalt sulphate Nickel sulphate	5,500tpa 41,500tpa	6,900tpa 55,300tpa	10,000tpa 81,000tpa

• PFS of 1Mtpa and 1.5Mtpa base case over a 25year mine life completed

• Expansion study of 2.25Mtpa with a 25-year mine life completed

• 94.5% nickel and 95.5% cobalt recovery – life of mine

• Pre-cobalt credit C1 costs in line with current worldwide operators

• High Pressure Acid Leach (HPAL) 5th generation plant is a proven design, successfully operated in other laterite projects globally

• 2.25Mtpa case based on only 26% of Goongarrie Resource

• Scandium by-product credit not factored in, so offers additional up-side

The information shown on this slide has been previously released on the ASX platform by Ardea in ASX releases, *Goongarrie Nickel Cobalt Project, PFS study, 28 March 2018 & +Goongarrie Expansion Study, 24 July 2018. All the material assumptions underpinning the forecast financial information derived from a production target, in the initial public report referred to in rule 5.17 continue to apply and have not materially changed.

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KNP Resource Breakdown

Kalgoorlie Nickel Project nickel-cobalt JORC Code (2012) Mineral Resource Estimate

Camp	Prospect	Resource Category	Size (Mt)	Ni (%)	Co (%)	Contained Metal Ni(kt) Co(kt)	Contained Metal Ni(kt) Co(kt)
KNP TOTAL		Measured	22	0.94	0.079	207	17
		Indicated	357	0.72	0.047	2,584	168
		Inferred	452	0.68	0.044	3,088	199
	GRAND TOTAL	Combined	830	0.71	0.046	5,879	384

Note: 0.5% nickel cutoff grade used to report resources. Note figures are rounded to reflect degree of certainty and may not tally. The information shown on this slide has been previously released on the ASX platform by Ardea in ASX release 16 June 2021.

In accordance with the Australian Securities Exchange Limited Listing Rules Appendix 5A:

The information in this report that relates to KNP Exploration Results is based on information originally compiled by previous full time employees of Heron Resources Limited and or Vale Inco. The Exploration Results and data collection processes have been reviewed, verified and re-interpreted by Mr Ian Buchhorn who is a Member of the Australasian Institute of Mining and Metallurgy and currently an executive director of Ardea Resources Limited. Mr Buchhorn has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the exploration activities undertaken to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Buchhorn consents to the inclusion in this report of the matters based on his information in the form and context that it appears.

The information in this report that relates to Mineral Resources for the Goongarrie Hill, Goongarrie South, Big Four, Scotia Dam and Highway nickel-cobalt deposits that comprise the Goongarrie Hub is based on information compiled by Mr James Ridley who is a Member of the Australasian Institute of Mining and Metallurgy, a full time employee of Ardea Resources and has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Ridley consents to the inclusion in the report of the matters based on this information in the form and context in which it appears.

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Goongarrie Hub Mineral Resources using a 0.8% Ni cut-off grade

Summary of Mineral Resource Estimate from the Goongarrie Hub, based on a 0.8% Ni cut-off grade, comprising resources at Goongarrie Hill, Goongarrie South, Highway, Big Four, Scotia Dam and Highway (ASX release 16 June 2021).

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Note figures are rounded to reflect degree of certainty and may not tally.

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Goongarrie Deposits Mineral Resources including Sc, using a 0.5% Ni cut-off grade

Summary of Mineral Resource Estimate from the Goongarrie deposits based on a 0.5% Ni cut-off grade (ASX release 15 February 2021).

Deposit	Resource Category	Tonnes (Mt)	Ni %	Co %	Contained Metal Ni (kt) Co (kt)	Contained Metal Ni (kt) Co (kt)	Sc Mt	Resources Sc ppm
Goongarrie Hill	Indicated	40	0.65	0.037	260	14.7	10.5	16
	Inferred	29	0.60	0.025	178	7.3	2.0	16
	Subtotal	69	0.63	0.032	438	21.9	12.5	16
Goongarrie South	Measured	18	0.94	0.085	172	15.4	18.2	40
	Indicated	82	0.71	0.049	587	40.2	53.1	23
	Inferred	10	0.64	0.033	61	3.1	5.5	24
	Subtotal	110	0.75	0.053	820	58.7	76.8	27
Big Four	Indicated	49	0.71	0.047	345	22.9	31.9	24
	Inferred	14	0.68	0.043	95	6.1	2.9	24
	Subtotal	63	0.70	0.046	440	28.9	34.8	24
Scotia Dam	Indicated	12	0.71	0.065	82	7.4	11.2	25
	Inferred	5	0.72	0.043	37	2.2	0.6	22
	Subtotal	17	0.72	0.058	118	9.6	11.7	25
GNCP Total	Measured	18	0.94	0.085	172	15.4	18.2	40
	Indicated	182	0.70	0.047	1,274	85.1	106.6	23
	Inferred	58	0.64	0.032	371	18.6	11.0	23
	Grand Total	259	0.70	0.046	1,817	119.2	135.8	25

Note figures are rounded to reflect degree of certainty and may not tally.

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