SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorised.

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To: The Manager

       Announcements

       ASX Company Announcements Office

Public Announcement 2004-18

Please find attached media release from the South Australian Premier’s office relating to WMC Resources decision to invest a further $50 million over two years in a major study to determine whether there should be a multi-billion expansion of the Olympic Dam mine in South Australia’s mid-north.

A copy of this public announcement will be published on WMC’s web site at www.wmc.com later this morning.

Ross Mallett

Assistant Company Secretary

26 May 2004

For further information please contact:

Media contact:

Troy Hey

Group Manager - Public Affairs

Mbl: 0419 502 852

Investor/Analyst contact:

Adrian Fernando

Manager - Investor Relations

Mbl: 0438 068 049

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Wednesday 26 May 2004

$50 MILLION STUDY TO GAUGE FUTURE OF OLYMPIC DAM

WMC Resources Ltd today announced it will invest a further $50 million over two years in a major study to determine whether there should be a multi-billion expansion of the Olympic Dam mine in South Australia’s mid-north.

Premier Mike Rann says the SA Government is giving its full support to the study which will help WMC determine whether it should double the capacity of the mine at a cost of between $2 billion and $4 billion by the end of the decade.

“The potential for the Olympic Dam mine is huge.

“An expansion of this size could lead to the creation of hundreds of jobs and further growth in the population of the Roxby Downs township, which is already 4,000.

“This would also help the State achieve many of the targets laid out in the State Strategic Plan including increasing minerals production to $3 billion and increasing minerals processing by a further $1 billion by 2020 as well as increasing SA’s population to 2 million by 2050.

“It should also help us in our target of trebling the value of SA’s export income to $25 billion by 2013.

“At present, the Olympic Dam is the world’s eighth largest copper deposit and largest known uranium deposit. Last year, it generated $670 million in export income for Australia.

“This has the potential to double if the expansion goes ahead,” Mr Rann said.

WMC has already invested $4 billion in developing Olympic Dam, including $600 million in the past three years and another $80 million during this year in mine development.

Major activities for the next phase of the Study include:

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WMC Resources CEO, Andrew Michelmore says Olympic Dam is already Australia’s largest underground mine and mineral processing operation.

“Olympic Dam currently has an annual production capacity of 235 000 tonnes of copper, 4 500 tonnes of uranium and 100 000 ounces of gold.

“Studies so far have shown that by extending underground mining, Olympic Dam could produce up to 350 000 tonnes of copper per year.

“Open pit mining, when added to continuing underground operations, could increase copper production to in excess of 500 000 tonnes per annum.

“By 2006, WMC will be in a position to identify a single preferred life of mine development plan for the total resource. That option would become the subject of a final feasibility study,” Mr Michelmore said

The development study work will be in addition to ongoing assessment of Olympic Dam’s future energy needs, including the option of connecting Olympic Dam to a natural gas network.

In its Study, WMC will work closely with the SA Economic Development Board and the State Government Task Force for further development of Olympic Dam, appointed by the Premier in 2002.

For further information contact Jill Bottrall on 8463 3362 or 0419 99 01 60.

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To: The Manager

       Announcements

       ASX Company Announcements Office

Public Announcement 2004-20

In accordance with Listing Rule 2.7 please find enclosed Appendix 3B, application for quotation of additional securities.

Ross Mallett

Assistant Company Secretary

7 July 2004

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Appendix 3B

New issue announcement

Rule 2.7, 3.10.3, 3.10.4, 3.10.5

Appendix 3B

New issue announcement,

application for quotation of additional securities

and agreement

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public.

Introduced 1/7/96. Origin: Appendix 5. Amended 1/7/98, 1/9/99, 1/7/2000, 30/9/2001, 11/3/2002, 1/1/2003.

Name of entity

WMC Resources Ltd

ABN

74 004 184 598

We (the entity) give ASX the following information.

+ See chapter 19 for defined terms.

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Deferred profits

Profits arising on the close out of the legacy hedge book during 2003 have been deferred and will be recognised during 2004 to 2010 as shown in the tables below.

Deferred cashflows

In 2001 some foreign exchange and gold hedges were reversed as a result of the gold asset sales. The profit and loss on these transactions was realised in 2001 and the cash outflow was scheduled to occur as shown in the table below.

During the quarter we took advantage of our strong cash inflows to arrange the early repayment of these amounts.

A total payment of A$107M was made to clear A$127M of these outstandings, with the A$20M reduction against the scheduled payment profile reflecting the time value of money at Australian dollar interest rates.

An amount of A$0.7M cash outflow remains deferred at 30 June 2004 and will mature in the second half of 2004.

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Date: 29 July 2004

Public Announcement 2004-22

WMC and Jinchuan sign strategic alliance for joint exploration in China

WMC Resources Ltd (WMC) and China’s largest nickel producer, Jinchuan Group Limited (Jinchuan) this week signed an Exploration Co-operation Agreement that will see the two companies form a partnership to explore for nickel in China.

Under the agreement, the two companies will form a strategic alliance to explore for nickel sulphides and associated metals in Jinchuan’s home province of Gansu in central China and in other parts of China.

The partnership will be owned and funded on a 50-50 basis, with WMC and Jinchuan sharing the cost of any agreed exploration programs. Exploration tenements in the area of interest have already been secured under the agreement.

The board and management team for the joint venture company to be formed out of the partnership will be drawn from WMC and Jinchuan.

The agreement also carries provisions for advanced joint exploration, development and mining of any nickel sulphide ore bodies discovered within the area of interest, and Jinchuan will have a first right of purchase, linked to international commercial terms, for nickel produced.

The agreement was signed in Melbourne this week by WMC Resources’ Chief Executive Officer, Mr Andrew Michelmore and Jinchuan Group’s President and Chairman, Mr Li Yong-jun.

“This agreement is based on a set of shared principles. It has been forged out of a valued, long-term relationship between WMC and Jinchuan. It is underpinned by mutual understanding and a co-operative, positive approach,” Mr Michelmore and Mr Li said in a joint statement.

The agreement is the next step in a 16-year relationship between the Australian and Chinese companies, both of whom are their country’s biggest nickel producers.

The signing of this agreement was witnessed by Mr Zhang Chong, Director of the Department of Land and Resources of Gansu Province, as a representative of the Gansu Provincial Government.

Mr Zhang Chong commented: “The Government of Gansu Province strongly supports the cooperation between WMC and Jinchuan in this exploration venture, and more broadly we welcome the deepening of the relationship between these two companies.”

Mr Michelmore said: “This strategic alliance combines WMC’s nickel sulphide exploration expertise with Jinchuan’s local knowledge and vast experience in the nickel business. We are very pleased to have strengthened an already strong relationship with a respected nickel producer like Jinchuan, and we look forward to pursuing exploration programs in China alongside our new partner.”

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The close association between WMC and Jinchuan began in 1988 when WMC assisted Jinchuan in the construction of its nickel smelter in Gansu Province.

“Jinchuan welcomes the formalising of this alliance. WMC has a strong exploration skills base and a reputation for applying cutting edge technology for data interpretation,” Mr Li said.

In August last year, WMC agreed to a five-year nickel supply contract with Jinchuan, beginning in 2005. That contract calls for WMC to supply to Jinchuan 90,000 tonnes of nickel (in matte form), and it comes on top of an earlier agreement to provide 30,000 tonnes of nickel. When valued at current prices, that 120,000 tonnes of nickel is worth US$1.8 billion.

The Jinchuan Group is located in Jinchang, known as China’s nickel capital. Jinchuan is China’s largest integrated producer of nickel for the domestic market. Jinchuan’s nickel output accounts for more than 88 per cent of Chinese production.

WMC Resources is one of Australia’s largest minerals development companies, and ranks as the world’s third largest nickel producer. WMC’s current nickel production comes from Western Australia.

Note: A photo of Jinchuan’s Mr Li Yong-jun and WMC’s Mr Andrew Michelmore signing the agreement in Melbourne on 26 July 2004 is available by contacting Heather Lakin on telephone (03) 9685 6101 or via email heather.lakin@wmc.com

For further information contact:

Media contact:

Troy Hey

Group Manager – Public Affairs

Telephone: (03) 9685 6233

Mobile: 0419 502 852

Analyst contact:

Nerida Mossop

Manager – Investor Relations

Telephone: (03) 9685 6274

Mobile: 0418 378 809

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Announcements

ASX Company Announcements Office

Public Announcement 2004-23

WMC Resources Ltd 2004 Half-Year Results

Please find attached for immediate release Public Announcement 2004-23 covering the release of WMC Resources Ltd’s Financial Results for the half-year ended 30 June 2004.

The following documents are included as part of the release:

WMC’s Chief Executive Officer, Mr Andrew Michelmore, will host an audio conference and webcast presentation at 1.00pm this afternoon which will be broadcast live from WMC’s web site at www.wmc.com . A recording of this conference will be available for playback on WMC’s web site later this evening.

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WMC RESOURCES LTD

FACT FILE

FOR THE SIX MONTHS ENDED

30 JUNE 2004

FOR ADDITIONAL INFORMATIONS PLEASE CONTACT:

Media contact:

Troy Hey Group Manager – Public Affairs

Phone + 61 03 9685 6233 or +61 0419 502 852

troy.hey@wmc.com

Analyst and shareholder contact:

Nerida Mossop Manager – Investor Relations

Phone + 61 03 9685 6274 or + 61 0418 378 809

nerida.mossop@wmc.com

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DISCLAIMER

Statements contained in this material, particularly those regarding the possible or assumed future performance, costs, dividends, returns, production levels or rates, prices, reserves, divestments, potential growth of WMC, industry growth or other trend projections and any estimated company earnings are or may be forward looking statements. Such statements relate to future events and expectations and as such involve known and unknown risks and uncertainties. Actual results, actions and developments may differ materially from those expressed or implied by these forward looking statements depending on a variety of factors, including: variations in the market price of the minerals and metals produced by WMC, the impact of foreign currency exchange rates on these market prices, WMC’s ability to profitably produce and transport minerals and metals extracted to applicable markets, WMC’s ability to achieve projected cost and scheduling targets for repair and construction activities and the activities of governmental authorities in certain countries where WMC has projects, facilities or mines that are being explored or developed, as well as the factors discussed under the caption “Risk Factors” at pages 13 to 16 of WMC’s Annual Report on Form 20-F for the fiscal year ended December 31, 2003.

The presentation of WMC’s statement of financial performance, statement of financial position, and statement of cashflows and the business segment financial statements is designed to provide information in relation to each of the business segments and is therefore not set out in accordance with Australian Generally Accepted Accounting Principles (GAAP). Financial statements prepared in accordance with Australian GAAP can be found in the Half Yearly ASX Report.

All amounts are in Australian dollars unless otherwise stated.

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PUBLIC ANNOUNCEMENT

EARNINGS, RETURNS AND CASH FLOW UP IN STRONG FIRST HALF

PERFORMANCE

CEO COMMENTS

“Improving operational reliability and Australian dollar commodity prices increased earnings, returns and cashflows in the six months to June 2004,” said WMC Resources Ltd CEO, Andrew Michelmore.

“Our nickel operations produced first half performance to plan,with improved revenues and earnings growth.”

“A turnaround in reliability and profitability at Olympic Dam should continue throughout the year, with fertilizers also positioned for a stronger second half.”

“The gains from strong first half earnings have allowed us to reduce debt and gearing, building our capability for growth.”

“Balancing the dual demands of operational reliability and disciplined assessment of development opportunities will be the focus for us into 2005.”

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BUSINESS PERFORMANCE

HEALTH, SAFETY & ENVIRONMENT

Safety performance

The lost time plus medically treated injury frequency rate (IFR) for the period is slightly above rates achieved in 2003. While our total injury rate has not improved, the overall severity of injuries is significantly lower than experienced in previous years. Reflecting this, the lost time injury rate stands at 1.8 for the first half compared with the full year 2003 result of 3.2.

Remediation works at the Yeelirrie uranium project site in Western Australia commenced during the half. The rehabilitation plan has been developed with the approval of the State Mining Engineer and Radiological Council of WA, and is expected to be completed by year end.

Health, safety and environment performance data is also available at www.wmc.com/sustainability .

WMC SHARE PRICE (A$)

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BUSINESS PERFORMANCE

MARKETING

Commodity markets were buoyant throughout the half with firm prices for all our commodities. Exchange stocks of both nickel and copper remain tight, and demand for our output has been strong. Fertilizer pricing has improved, boosting our realised prices. Uranium spot prices have increased significantly in view of expectations of more balanced supply/demand. As uranium is sold under long term contracts, these increased spot prices will be reflected as new contracts are put in place.

DIVIDENDS

In consideration of the strong earnings and cashflows, driven by the cyclical highs in commodity prices, Directors have declared an interim dividend of 17 cents per share to be paid on 22 September with the record date for entitlements being 6 September. WMC will continue the Dividend Reinvestment Plan, but the Directors have determined that a zero per cent discount will apply to the interim dividend and to future dividends until further notice.

TREASURY

The Group is in a strong financial position. As operators of large world-class assets, we seek to finance our assets and growth opportunities with a mix of equity and debt financing that best balances risk and reward to shareholders.

The Group has total assets of $7.6 billion, equity of $4.4 billion and net debt of just under $1.1 billion at 30 June 2004. The Group’s gearing (measured as debt to debt-plus-equity) was below 20 per cent.

During June 2004, we took advantage of strong operating cashflow to arrange early repayment of residual foreign exchange and gold hedge obligations relating to the gold operations previously conducted by the Group. First half 2004 cashflows reflect the settlement of $107 million together with the current period payments, totalling $116 million.

Finance and Other costs (as reported in the Statement of Financial Position) of $10 million largely relates to the amortisation of net gain arising on translation of foreign currency debt.

Funding arrangements

Our 2003 Global Bond (US$500 million 10 year and US$200 million 30 year tenor) remains in place as our core long term debt funding. Given our low gearing and strong cashflows, we have cancelled part of our existing syndicated debt facility and will refinance the balance this month, prior to the maturity in November of one tranche, with a dual currency revolver bank facility of US$250 million with a two year maturity.

Legacy currency hedge book

The legacy currency hedge book for 2005 to 2008 was closed out in the 2003 year. The resulting profit of $367 million was deferred and will be recognised over the years of 2005 to 2008 in line with the underlying production. The recognition profile of the deferred profits is set out on page 8. The amounts recognised in 2005 to 2008 will be largely non-assessable for income tax purposes. The portion of the hedge book relating to the 2004 financial year was not closed out. The hedged position in respect of the 2004 contracts is also set out on page 8.

INSURANCE

Olympic Dam heat exchanger insurance claim

Results for the first half of 2004 include the recognition of a net $22 million receivable in respect of an insured event at the Group’s copper operations. The event, the failure of the heat exchanger in the acid plant, occurred in late 2003 with the insurance claim recently agreed. The majority of the proceeds are expected to be received in the third quarter of 2004. The net impact of the $22 million reflects as $42 million in revenue in copper operations (the insured party) and a $20 million charge against revenue in ‘other operations’ (incorporating Westminer Insurance – the Group’s captive insurance company).

SX insurance claim

WMC has an outstanding claim in relation to the 2001 Olympic Dam fire. An amount of $120 million was recognised in relation to the claim in the 2002 financial statements. To date, we have received $82 million of cash in relation to the claim and carry a receivable of $38 million on the balance sheet. We are currently engaged in a mediation process with our insurers. The final amount of the claim will be in excess of the $120 million already brought to account. Recognition of further amounts will be subject to the outcome of these discussions and accounting convention.

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BUSINESS PERFORMANCE

TAXATION

Recognition of off-balance sheet tax losses

Strong taxable income in 2003 and the outlook for 2004 increased the certainty of recovery of off-balance sheet tax losses to the point that accounting convention requires the company to recognise substantially all of the known tax losses. Recognition over the full financial year will result in an effective tax credit on current year profit before tax of around 10 per cent. There remains a proportion of tax losses yet to be recognised. These may be brought to account during the current financial year, subject to levels of taxable income and accounting convention.

Tax consolidation regime

We are yet to make a final determination whether or not to enter the tax consolidation regime. Accordingly, the benefits (if any), which may arise from entering the new tax regime, have not yet been fully evaluated.

Depending on the election made, it is possible but not yet quantifiable, that the projected full year tax credit may be further increased in the 2004 year.

COMMODITY AND CURRENCY HEDGING

The table below shows both the rates at which the open hedge transactions are contracted with third parties to determine the cashflow impact for each hedge and the fair valued rates for determining the profit and loss impact.

The legacy hedges were fair valued at the date of demerger. Consequently, the profit and loss for each hedge will be determined by the difference between a particular hedge’s fair valued rate and the spot price at the date of the hedge’s maturity.

Deferred profits

Profits arising on the close out of the legacy hedge book during 2003 have been deferred and will be recognised during 2004 to 2010 as shown in the table below.