TIDMNUS 
 
Nautilus Minerals Inc.: US$100 Million to Be Raised in Private Placement 
FOR:  NAUTILUS MINERALS INC. 
 
TSX, AIM SYMBOL:  NUS 
 
August 31, 2011 
 
Nautilus Minerals Inc.: US$100 Million to Be Raised in Private Placement 
 
VANCOUVER, BRITISH COLUMBIA--(Marketwire - Aug. 31, 2011) - Nautilus Minerals (TSX:NUS)(AIM:NUS) is to raise 
approximately US$100 million (C$98.1 million(i)) through a private placement of common shares to fund the 
development of its first project, Solwara 1, in the Bismarck Sea of Papua New Guinea. 
 
The placing will involve the issue of approximately 39 million shares to a number of investors at a price of 
CAD$2.52 (US$2.58) per share. 
 
Nautilus President and CEO Steve Rogers said the private placement would provide funds for the construction of 
the seafloor resource production system, which initially will be deployed at Solwara 1 - the company's first 
deepwater copper and gold project. 
 
The net proceeds of the non-brokered private placement, combined with the US$112 million in cash reserves held 
at the end of June 2011 and the contribution from joint venture partner Petromin PNG Holdings Limited are 
expected to be sufficient to fund the development of the offshore component of the mining joint venture 
excluding contingency and any working capital requirements. 
 
Investors participating in the placing include Mawarid Mining LLC, a subsidiary of MB Holdings Company LLC, an 
oil and gas, mineral mining and processing group based in Muscat, Oman. It will make an investment of 
approximately US$50.1 million to purchase 19.4 million shares, equivalent to 9.98% of the expanded share 
capital of the company. 
 
Existing Nautilus strategic shareholders, iron ore producer Metalloinvest and mining group Anglo American, also 
are participating in the private placement. Metalloinvest has subscribed for approximately 8.2 million shares 
to maintain its interest in Nautilus at 21%, and Anglo American has subscribed for approximately 4.3 million 
shares on the basis that its stake will be maintained at 11.1%. Institutional investors have subscribed for the 
remaining 7 million shares to be issued. 
 
Under the terms of the agreements, the private placement will be completed in two tranches, with the final 
closing taking place on 6 October, 2011. 
 
Nautilus has granted an anti-dilution right to the investors that will enable them to maintain their percentage 
ownership in the shares of Nautilus, as and when and at the price at which any common shares, or securities 
convertible into or exercisable for common shares, are issued by Nautilus until the earlier of the date of 
commencement of first production and February 28, 2014. 
 
Nautilus has agreed to pay a finder's fee of US$1 million in cash to arm's length parties. 
 
The private placement and payment of the finder's fee are subject to regulatory approval, including acceptance 
of the Toronto Stock Exchange. All securities will be subject to the statutory four-month hold period in 
Canada. 
 
As a result of the financing announced today, the Board of Nautilus has formally sanctioned the development of 
Solwara 1, subject to the closing of the private placement in full. 
 
Mr Rogers said he was pleased to welcome Mawarid Mining, with its strong mining and oil and gas pedigree, as a 
shareholder of Nautilus and noted the continued support from Metalloinvest and Anglo American. 
 
The MB group employs more than 6500 employees from 51 nationalities in the oil & gas, manufacturing and mining 
industries. First established in 1982, the group has operations and subsidiaries spread across the globe, 
including the Middle East, Europe, North Africa, Asia, Asia-Pacific, Australia and New Zealand. It was the 
first private sector organization to engage in gold and copper exploration in Oman, where it operates several 
open pit copper mines and processes ore at its copper concentrate facility in the Al Batinah region. 
 
The MB group is owned by Dr Mohamed Barwani and his family. Dr Barwani is a petroleum engineer who has built 
the business over the past three decades. 
 
"This is a growing organisation with expertise in areas that are very relevant to our business. Its decision to 
participate as a shareholder represents another major vote of confidence in Nautilus and in the emerging 
seafloor resources industry," said Mr Rogers. 
 
About Nautilus Minerals Inc. 
 
Nautilus is the first company to explore the ocean floor for polymetallic seafloor massive sulphide deposits 
and is currently developing its first development project at Solwara 1, in the territorial waters of Papua New 
Guinea, where the company is aiming to produce gold, copper and silver. The company has been granted all 
necessary environmental and mining permits. 
 
Nautilus is intending to commence operations at the Solwara 1 deposit, where it has defined an NI 43-101 
resource as follows: 
 
/T/ 
 
=-  Indicated Mineral Resource: 870 kt @ 6.8% Cu, 4.8 g/t Au, 23 g/t Ag, 
    0.4% Zn. 
=-  Inferred Mineral Resource: 1,300 kt @ 7.5% Cu, 7.2 g/t Au, 37 g/t Ag, 
    0.8% Zn. 
 
/T/ 
 
The news release dated December 20, 2007 regarding the resource estimate is available at 
http://www.nautilusminerals.com/s/Media-NewsReleases.asp?ReportID=278419 
 
The company also holds approximately 600,000 square kilometers of highly prospective exploration acreage in the 
western Pacific, in PNG, the Solomon Islands, Fiji, Vanuatu and Tonga, as well as in international waters in 
the eastern Pacific. 
 
A Canadian registered company, Nautilus is listed on the TSX and AIM stock exchanges and has its corporate 
office in Brisbane, Australia. Following the closing of the private placement, Nautilus will have approximately 
195 million issued shares. Its major shareholders include Metalloinvest, the largest commercial iron ore 
producer in Europe and the CIS, which has a 21% holding, and global mining group Anglo American, which holds an 
11.1% interest. 
 
(i)Exchange rate C$1.00 = US$1.022 
 
Certain of the statements made in this news release may contain forward-looking statements within the meaning 
of the United States Securities Exchange Act of 1934 and forward-looking information within the meaning of 
applicable Canadian securities law. Forward-looking statements and forward-looking information include, but are 
not limited to statements or information with respect to the completion of the private placement, the 
contribution of funds from Petromin PNG Holdings Limited, that proceeds from the placement, existing cash 
reserves, contribution from Petromin and other sources of capital will be sufficient to fund the project into 
production. We have made numerous assumptions about the material forward-looking statements and information 
contained herein, including among other things, that the approved project budget is an accurate estimate of the 
funding necessary to take the project into production. Even though our management believes that the assumptions 
made and the expectations represented by such statements or information are reasonable, there can be no 
assurance that the forward-looking statement or information will prove to be accurate. Forward-looking 
statements and information by their nature involve known and unknown risks, uncertainties and other factors 
which may cause the actual results to be materially different from any future results expressed or implied by 
such forward-looking statements or information. Such risks, uncertainties and other factors include, among 
others, the risk that the project budget is not an accurate estimate of funding required, the private placement 
is not successfully concluded by some or all parties or that Petromin does not make its contribution and 
regulatory approval in respect of the private placement is not received. Should one or more of these risks, 
uncertainties or other factors materialize, or should underlying assumptions prove incorrect, actual results 
may vary materially from those described in forward-looking statements and information. Although we have 
attempted to identify factors that would cause actual results to differ materially from those described in 
forward-looking statements and information, there may be other factors that cause actual results, performances, 
achievements or events to not be as anticipated, estimated or intended. Also, many of the factors are beyond 
our control. There can be no assurance that forward-looking statements or information will prove to be 
accurate, as actual results and future events could differ materially from those anticipated in such 
statements. Accordingly you should not place undue reliance on forward-looking statements or information. 
Except as required by law, we do not expect to update forward-looking statements and information as conditions 
change and you are referred to the full discussion of Nautilus's business contained in Nautilus's reports filed 
with the securities regulatory authorities in Canada. 
 
 
-30- 
 
FOR FURTHER INFORMATION PLEASE CONTACT: 
 
Nautilus Minerals Inc. (Toronto) 
Investor Relations 
+1 (416) 551 1100 
investor@nautilusminerals.com 
 
OR 
 
Nautilus Minerals Inc. 
Joe Dowling 
Vice President Investor Relations and Communications 
+61 (7) 3318 5544 or Cell: +61 431 365 741 
jjd@nautilusminerals.com 
www.nautilusminerals.com 
 
OR 
 
Numis Securities Limited 
John Harrison 
Nominated Adviser 
+ 44(0) 20 7260 1000 
 
OR 
 
Numis Securities Limited 
James Black 
Corporate Broking 
+ 44(0) 20 7260 1000 
 
Neither the TSX nor the London Stock Exchange accepts responsibility for the adequacy or accuracy of this press 
release. 
 
 
 
 
Nautilus Minerals Inc. 
 

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