Mr. Mike Johnston reports

NAUTILUS CONFIRMS GRADE AND EXTENT OF CCZ NODULE DEPOSIT

Nautilus Minerals Inc.'s 100-per-cent-owned subsidiary, Tonga Offshore Mining Ltd., has processed data and received analytical results from samples collected during the exploration program conducted aboard the R/V Mt. Mitchell vessel over its Clarion Clipperton zone project located in the central Pacific.

Nautilus's chief executive officer and TOML director, Mike Johnston, stated: "The consistently high grades of the samples qualitatively support the grade of elements reported in our March, 2013, NI 43-101 technical report, with these assay results suggesting potential for other elements such as molybdenum and rare earth elements as byproducts. The multibeam echosounder and backscatter results further support the continuous nature of mineralization across our entire contract area, including area E and area F, which were not part of the current inferred resource estimate, but which area represents around 30 per cent of the total TOML contract area. We have sufficient samples to complete our initial metallurgical studies. This work will also be supported by preliminary engineering studies on key elements of the materials handling system."

          SUMMARY ASSAYS FOR DREDGE SAMPLE COMPOSITES 
            FROM TOML AREAS B, D, F WITHIN THE CCZ
Area/
sled                Sub-    Depth
ID     Lithology samples   (mbsl) Ni % Cu %  Co % Mn % Fe %

B1        Nodule      20     4800 1.50 1.17 0.245 30.3 5.65
D1        Nodule      20     4600 1.39 1.19 0.200 30.2 5.29
D2        Nodule      20     4700 1.40 1.20 0.214 30.8 5.59
D4        Nodule      20     4700 1.28 1.17 0.225 30.3 5.16
D5        Nodule      20     4600 1.47 1.27 0.211 30.6 5.11
D6        Nodule      17     4400 1.39 1.18 0.224 30.5 5.51
D7        Nodule      20     4400 1.44 1.27 0.233 29.9 5.38
D8        Nodule      20     4400 1.35 1.22 0.213 29.0 5.63
D9        Nodule      20     4400 1.41 1.21 0.218 29.6 5.67
F1        Nodule      20     4200 1.36 1.17 0.143 32.0 6.16
F2        Nodule      21     4400 1.33 1.38 0.130 31.8 5.12
F3        Nodule      21     4400 1.42 1.33 0.137 32.0 5.07
F4        Nodule      20     4300 1.36 1.34 0.157 32.4 5.14
Nodule
D4       (crust)      20     4700 0.30 0.34 0.065 8.20 4.61
Nodule
D6       (crust)      14     4400 1.23 0.99 0.188 27.1 5.60
Nodule
D8       (crust)       9     4400 1.01 0.88 0.219 21.4 6.90

  AVERAGE MOLYBDENUM AND REE ASSAYS FOR A DREDGE 
   SAMPLE COMPOSITE (23 SAMPLES) FROM TOML AREAS 
              B, D, F WITHIN THE CCZ
                                                                            
Element                 Symbol       Average (ppm)

Molybdenum                  Mo                 552
Scandium                    Sc                11.8
Yttrium                      Y                74.1
Lanthanum                   La                88.4
Cerium                      Ce                 257
Praseodymium                Pr                28.1
Neodymium                   Nd                 112
Samarium                    Sm                28.7
Europium                    Eu                7.01
Gadolinium                  Gd                27.7
Terbium                     Tb                4.20
Dysprosium                  Dy                24.2
Holmium                     Ho                4.30
Erbium                      Er                11.9
Thulium                     Tm                1.59
Ytterbium                   Yb                11.4
Lutetium                    Lu                1.67

Approximately 64,000 square kilometres of MBES and backscatter were collected using a Kongsberg EM120 (12 kHz) multibeam echosounder over about 85 per cent of the granted contract area. These data allow for detailed geological mapping of terranes, sea floor composition, and nodule distribution and relative nodule abundance. The results of this work will be used to focus future work.

The sample composites in the Summary assays table were collected using an epibenthic sled (refer to the sampling methodology section below for more details). These samples were taken for preliminary chemical investigation and bulk metallurgical testwork and were not collected in a manner that can support any type of quantitative assessment of the mineral resource estimate. (Nimmo (2013): 410 million tons at 1.2 per cent nickel, 1.1 per cent copper, 0.24 per cent cobalt and 27 per cent manganese (abundance cut-off six wet kilograms per square metre).)

Laboratory analysis

Analysis of the nodules was done by two leading laboratories, with techniques refined so as to apply to the nodules' physical and chemical nature. A multielement analysis method has now been developed, which will be used for future nodule sampling programs and to support any future mineral resource updates.

The laboratory analyses results in the Summary assays table were completed by the independent ALS Laboratory Group in Brisbane, Australia. ALS Brisbane has extensive experience in the analysis of high manganese materials by the XRF method. ALS operates quality systems based on international standards ISO/IEC17025:1999, "General requirements for competence of calibration and testing laboratories," and ISO9001:2000, "Quality Management Systems -- Requirements."

Nickel, copper, cobalt, manganese and iron were determined using a chromite/manganese ore-fused disk XRF method (ME-XRF26s).

The laboratory analyses results in the Average molybdenum and REE assays table were completed by the independent laboratory operated by the integrated environmental studies program group, Earth and space sciences program, at Jacobs University in Bremen, Germany. This group has been involved in nodule analysis and study for over 10 years and has been integral to much of the development of nodule standards used in the industry. All of the elements reported in the table were determined using a nitric acid digest ICP MS method.

Sampling methodology

Fourteen deployments of an epibenthic sled were made by TOML during the 2013 cruise to the CCZ, recovering about 2.1 tonnes of mineralized nodules. The sled was towed across the sea floor and then retrieved to the vessel with sample caught in a net. Thirteen samples were of sufficient size (40 to 370 kilograms) to use for analytical and test purposes.

The sled samples were taken to be used for metallurgical testwork and so were not subjected to crushing and splitting. Small subsamples were collected by hand from each sled sample with discrimination of nodules from nodule crusts when both were present. Nodule crusts are a subtype of nodule that includes some proportion of benthic sea floor sediment. A carefully hand-split duplicate subsample was included per group of sled samples.

Each subsample (302 plus 16 duplicates in total) was analyzed separately and averages (excluding duplicates) are summarized in the Summary assays table.

Thirty subsamples (including seven duplicates) were selected based on a range of chemistry and sample locations, and submitted for analysis for rare earth elements. Averages (excluding duplicates) are given in the Average molybdenum and REE assays table.

Quality assurance

Sample duplicates, laboratory standards, laboratory duplicates and laboratory blanks were measured, and their analytical results are assessed to be within acceptable tolerances. Samples were assayed using multiple methods (ICP and XRF) and by two laboratories (ALS in Brisbane and Jacobs in Germany) which allowed verification of assaying method, identification of any issues in assaying and to formulate the preferred method for assaying to be used in future sampling programs.

Qualified person Mathew Nimmo has verified the exploration information disclosed herein. This includes review of the sampling, sample preparation, chemical analysis and quality assurance processes. Due to the remote nature of sampling it does not include independent check sampling, however the sample grades received for this exercise are very similar to those obtained historically, which were sampled and analyzed independently.

Qualified person

The exploration results reported in this press release have been compiled under the supervision of Jonathan Lowe, vice-president, strategic direction and exploration, of Nautilus Minerals. Mr. Lowe is a fellow and chartered professional of the Australasian Institute of Mining and Metallurgy, has over 19 years experience in exploration geoscience, and is a qualified person as defined by National Instrument 43-101. He has read and approved the technical disclosure in this release.

Mr. Nimmo is the principal geologist and a full-time employee of Golder Associates Pty. Ltd., is a Member of the Australian Institute of Geoscientists, and has sufficient experience in resource estimation to qualify as a qualified person under National Instrument 43-101. He has reviewed the planning of the sampling process and the laboratory assay results described within this technical disclosure, which he has read and approved for release.

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