RNS Number:2909Z
Neptune Minerals Plc
29 June 2007



FOR IMMEDIATE RELEASE                                        29 JUNE, 2007



                              NEPTUNE MINERALS PLC

                          ("Neptune" or the "Company")



                 NEPTUNE SIGNS FOR OFFSHORE NZ MAPPING PROGRAM



Neptune Minerals Plc (AIM: NPM) - the AIM listed explorer and developer of
Seafloor Massive Sulphide ("SMS") deposits - announces that it has signed a
contract to undertake exploration operations, the Coleville-Monowai 07 program,
over two of its New Zealand Licences.

The specialised fisheries and survey vessel RV Tangaroa will undertake the
30-day program in July and August 2007.  NIWA, the New Zealand National
Institute for Water and Atmospheric Studies (www.niwa.co.nz), owns and operates
several research vessels, including Tangaroa.  RV Tangaroa has been the primary
tool used in New Zealand's definition of its EEZ and continental shelf.  Neptune
was offered, at short notice, a 30-day charter when a previous charterer was
unable to commit.

The work undertaken will comprise hull-mounted multi-beam bathymetric (swath)
mapping of multiple SMS target areas within Neptune's Prospecting Licences
PL39-194 (Monowai) of 47,000 km2 area and PL39-205 (Colville) of 13,000 km2
area.   The program will fulfil the first term work commitment and expenditure
requirement for both tenements.

Neptune has three New Zealand prospecting licences totalling more than 63,000
km2. The licences are regulated and administered by the Crown Minerals
Department (www.crownminerals.govt.nz/minerals) of the New Zealand Government.

Neptune's Chief Executive Officer, Dr Simon McDonald, said:

"Neptune is pleased with the opportunity to use NIWA's RV Tangaroa to undertake
Colville-Monowai 07.  This work builds on the existing relationship with NIWA
undertaking biological studies on past and present Neptune Kermadec programs.
Colville-Monowai 07 is the second major exploration activity that Neptune will
undertake on its NZ tenements in 2007 and is the third program undertaken using
funds raised at IPO in October 2005.

"Completing Colville-Monowai 07 in August 2007 will fulfil Neptune's tenement
obligations nine months ahead of schedule.  The prime objective of the program
is to acquire additional swath coverage within the two tenements - the seafloor
equivalent of aerial photography.  That seafloor imagery will be used for follow
up high-resolution exploration of SMS deposits, in work similar to Neptune's
present Kermadec 07 program."



                                      END



For further information please contact:



Simon McDonald (Neptune MD and CEO):                    info@nepmins.com



Olly Cairns (Blue Oar Securities Plc, Nomad and Broker): T: +44 (0) 20 7448 4400



Sofia Rehman (Cardew Group, PR):                         T: +44 (0) 20 7930 0777



The Neptune Minerals Website is www.neptuneminerals.com








                      This information is provided by RNS
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