Mr. Joseph Arengi of Alder reports

ALDER INTERSECTS 65 METRES GRADING 1.48 G/T GOLD, 0.20% COPPER AND 2.00 G/T SILVER AT THE ROSITA PROJECT, NICARAGUA

Alder Resources Ltd. and Calibre Mining Corp. have released assay results from a continuing core drilling program at the Rosita copper-gold-silver project in northeast Nicaragua. Results include a wide intercept of 65 metres grading 1.48 grams per tonne (g/t) gold (Au) from hole D910 that tested immediately below the southwest end of the Santa Rita pit. Included in this intercept are eight metres grading 6.9 g/t Au and an interval of copper-gold-silver (Cu-Au-Ag) mineralization that includes 15.0 metres grading 0.57 per cent copper (Cu), 1.52 g/t Au and 5.93 g/t silver (Ag) with four metres grading 1.46 per cent Cu, 3.22 g/t Au and 15.25 g/t Ag. Selected highlights of results received to date are presented in the associated table.

The drill rig is currently sited on the southeast side of the Santa Rita pit, approximately 200 metres east of hole D910, where it is testing a 1970s La Luz Mines intercept which returned an 18.3-metre (true thickness) interval grading 2.95 per cent Cu, 3.2 g/t Au and 33.3 g/t Ag at 60 metres below the pit bottom. It is believed that this high-grade intercept occurs within the same mineralized structural corridor that hosts mineralization in hole D910 and that drilling has now traced the corridor for approximately 1,100 metres from hole D907 through to hole D906. This mineralized corridor contains most of the historic resources on the Rosita property and will be the focus of infill drilling.

Alder will target the Bambana prospect next where exploration work has developed an exciting Cu-Au-Ag porphyry prospect. At Bambana, a 700-metre-by-500-metre IP chargeability geophysical anomaly appears to be related to porphyry-type mineralization in a trench that returned 3.32 per cent Cu, 0.22 g/t Au and 37.55 g/t Ag over 12.0 metres. This target represents significant potential upside for Alder in addition to the Santa Rita and R-13 mineralized zones.

                          ROSITA DRILL INTERCEPTS                                            
 
                From       To   Thickness       Cu      Au      Ag         Zn
Hole ID          (m)      (m)         (m)      (%)   (g/t)   (g/t)        (%)

D901            75.0     85.9        10.9     0.36    0.15    6.32       1.05
                89.0     92.0         3.0     0.12    1.27    3.57
D902            39.0     45.0         6.0     0.18    0.17    3.45       0.08
                61.0     77.0        16.0     0.32    0.66   12.49       0.29
               153.0    161.0         8.0     0.38    0.04    3.71
D903           109.0    110.0         1.0     0.01    0.33    9.00       1.62
D904             3.0     14.0        11.0     0.09    0.13    7.16
                25.0     27.0         2.0     0.94    0.75   10.00
                52.1     53.0         0.9     3.33    0.40   40.10       0.23
                67.0     75.0         8.0     0.10    0.81   16.53       0.69
               151.0    152.1         1.1     0.11    0.20   88.50       0.18
               211.0    212.1         1.1     0.55    0.18   11.60       0.34
D905           215.8    217.3         1.5     1.02    0.69    2.88
D906           213.0    217.0         4.0     0.49    1.15    4.40
                                                              less
                                                              than
D907            43.0     67.0        24.0     0.09    0.15     0.1
D908                                                                Low grade
D909                                                           Assays pending
                                                      1.48
                                                     (1.00
D910            50.0    115.0        65.0     0.20    cut)    2.00
                                              less    6.90    less
                                              than   (3.03    than
                84.0     92.0         8.0      0.1    cut)     0.1
               100.0    115.0        15.0     0.57    1.52    5.93
               106.0    110.0         4.0     1.46    3.22   15.25
D911                                                           Assays pending
D912                                                           Assays pending
D913                                                           Assays pending
D914                                                           Assays pending
D915                                                              In progress
                                    

To date a total of 4,732 metres have been drilled in 15 holes, all in the Santa Rita/R-13 area. Assay results in this news release represent the first 3,144 metres in nine holes of an 8,000-metre drill program for the Rosita project. The initial 5,000-metre campaign is centred on the historic Santa Rita and R-13 pits, where approximately 5.5 million tonnes of ore averaging 2.06 per cent Cu, 0.93 g/t Au and 15 g/t Ag were extracted by La Luz Mines (a subsidiary of Falconbridge) in the mid-1970s when low metal prices forced mine closure. An additional 3,000 metres will be drilled at Bambana and other targets generated during the exploration program. The drill program has three main objectives:

• Obtain basic geologic information to establish the controls for mineralization, the limits of skarn development and the extent of the volcanic intrusive domains;
• Selectively test historic mineralized intercepts;
• Identify areas for follow-up drilling that could add tonnage and complement the stockpile resource increasing the attractiveness of a potential commercial operation.

The drilling is highlighted by hole D910, which returned a long interval averaging 1.48 g/t Au over 65 metres in garnet-quartz-calcite-epidote-pyrite-chalcopyrite skarn cut locally by mineralized veinlets and breccias which tend to boost precious metal grades. Included in this interval is a 15.0-metre section that returned 0.57 per cent Cu, 1.52 g/t Au and 15.25 g/t Ag. Alder management has maintained that a significant tonnage of Cu-Au-Ag mineralization can be identified by exploring adjacent to and below the Santa Rita and R-13 pits. Alder believes discovery hole D910 and several narrower drill intercepts in the other core holes validate this hypothesis and provide specific areas for follow-up investigations. The mineralization in hole D910 is open at depth and to the east. Hole D907, 400 metres west of D910, intersected a 24.0-metre interval of 0.15 g/t Au and 0.09 per cent Cu and may represent the western continuation of the system. Additional drilling is required to determine the strike of the gold-copper zone.

Alder president and chief executive officer Joe Arengi states: "The discovery of a new style of gold mineralization along the south side of the Santa Rita pit in hole D910 is highly significant. This long gold-copper intercept is very different from the style of mineralization historically developed, where narrower intervals of high grade were more commonly mined. The initial results have successfully identified a significant mineralized corridor that displays two styles of mineralization and is open in all directions. Any Cu-Au-Ag mineralization defined along this corridor will complement the existing stockpile resource and bolster project economics. We are also very pleased with the progress our exploration team has made at the large Bambana porphyry target. Both the Bambana and Santa Rita target areas are of sufficient size to generate significant tonnage that should attract the attention of the market."

Other highlights include drill holes D905 and D907 both of which intersected intervals of quartz-sulphide-magnetite veinlets in an altered diorite intrusive. Hole D907 cut a 24-metre interval (from 43 metres to 67 metres) of veinlet stockwork which returned highly anomalous gold (0.15 g/t) and copper (0.09 per cent Cu). Alder believes that follow-up work in this area is warranted.

The Rosita project

The Rosita project is located seven kilometres north of the Primavera prospect, where Calibre Mining Corp. and B2Gold Corp. announced the discovery of significant porphyry-style Au-Cu mineralization, including 261.7 metres grading 0.78 g/t Au and 0.30 per cent Cu in a diamond drill hole (Calibre news release dated Jan. 20, 2012).

In a news release dated May 9, 2012, Alder announced an independent National Instrument 43-101-compliant inferred resource estimate for the stockpiles at Rosita. The resource estimate totals 108.5 million pounds Cu, 118,500 ounces Au and 2.35 million ounces Ag contained within 7.95 million tonnes based on a cut-off of 0.15 per cent copper equivalent and averages 0.62 per cent Cu, 0.46 g/t Au and 9.21 g/t Ag.

Drilling will now focus on the Bambana prospect where several IP anomalies have been delineated. Targets will be selectively drill tested. In addition, an IP resistivity geophysical survey is nearing completion that has delineated several distinct chargeability anomalies, with 50.5 line kilometres completed, representing approximately 72 per cent of the proposed program. Chargeability anomalies are inferred to represent areas of disseminated sulphide mineralization that could represent porphyry-type exploration targets. Detailed geologic alteration mapping at Bambana has been completed and trenching is planned across several of the stronger anomalies.

Quality assurance/quality control (QA/QC)

All holes are collared in HQ-size drill core and reduced to NQ-size where reduction is necessary. Core is transferred into wooden core boxes and transported on a daily basis by company personnel to Alder's secure field office in Rosita, where geologists log the holes and select intervals for assay. Individual samples of drill core are sawed using a 10-inch diamond blade trim saw. Half of the sample is retained in the core box, and the other half loaded into a prenumbered heavy-gauge plastic bag, sealed then trucked on a weekly basis (by the lab or by company personnel) to Inspectorate Exploration and Mining Services' preparation laboratory in Managua. Pulps are prepared for shipping to Inspectorate's analytical laboratory in Vancouver where each sample is analyzed for total copper using aqua regia digestion and a 30-element ICP (inductively coupled plasma atomic emission spectrometry) method and gold using fire assay with AA finish. Alder has implemented an industry-standard quality assurance/quality control program that includes the insertion of certified standards and blanks into the sample stream.

Qualified person

John C. Spurney, certified professional geologist (CPG-11007), vice-president exploration for Alder, and a qualified person as defined by NI 43-101, has reviewed and approved the scientific and technical content of this news release.

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