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Press release from Marketwire

Nautilus Releases NI 43-101 Resource Report for Polymetallic Nodules

Monday, September 24, 2012

Nautilus Releases NI 43-101 Resource Report for Polymetallic Nodules17:09 EDT Monday, September 24, 2012TORONTO, ONTARIO--(Marketwire - Sept. 24, 2012) - Nautilus Minerals (TSX:NUS)(OTCQX:NUSMF)(AIM:NUS) announces the release by its 100% owned subsidiary, Tonga Offshore Mining Limited ("TOML"), of an independent Technical Report prepared by Golder Associates Pty Ltd in accordance with National Instrument 43-101 in respect of a maiden Mineral Resource estimate for TOML's Clarion-Clipperton Fracture Zone polymetallic nodule project, located within the Central Pacific Ocean (see Links section for related press release and location map).Links http://www.nautilusminerals.com/s/Media-NewsReleases.asp?ReportID=548462&_Type=News-Releases&_Title=Nautilus-Minerals-Defines-410-million-tonne-Inferred-Mineral-Resource Figure 1 - Map of tenements http://www.nautilusminerals.com/s/Image.asp?i=maps/2012-09-18_NRM.jpg General Background:The nodules occur within the Clarion Clipperton Zone of the tropical north Pacific (Figure 1), in water depths generally between 4,000 and 6,000 meters. They contain significant grades of manganese, nickel, copper and cobalt, and form by the precipitation of metals on the seafloor, either directly from ocean waters or via decomposing microorganisms and/or their effluent in benthic sediments. Mr Mathew Nimmo of Golder Associates Pty Ltd as independent Qualified Person has prepared the technical information that forms the basis for this press release.The report has been filed on SEDAR www.sedar.com and is available from the Company's website at www.nautilusminerals.com.About Nautilus Minerals Inc.Nautilus is the first company to explore the ocean floor for polymetallic seafloor massive sulphide deposits and is developing its first project at Solwara 1, in the territorial waters of Papua New Guinea, where it is aiming to produce copper, gold and silver. The company has been granted all necessary environmental and mining permits. Nautilus also holds more than 500,000 km2 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:NUS and AIM:NUS stock exchanges and OTCQX: NUSMF. Its corporate office is in Brisbane, Australia. Its major shareholders include Metalloinvest, the largest iron ore producer in Europe and the CIS, which has a 21% holding, global mining group Anglo American, which holds an 11.1% interest and MB Holdings, an Oman based group with interests in mining, oil & gas, which holds a 16.9% interest.FOR FURTHER INFORMATION PLEASE CONTACT: Investor RelationsNautilus Minerals Inc.+1 (416) 551 1100investor@nautilusminerals.comwww.nautilusminerals.comORNominated adviser: Alastair Stratton/Stuart SkinnerNumis Securities LimitedCorporate broking: James Black+44(0) 20 7260 1000ORChristopher R. WeekesDahlman Rose & Co., LLCDirect: +1 212 372 5766Neither the TSX, London Stock Exchange, nor the OTCQX accepts responsibility for the adequacy or accuracy of this press release.