Polar Star Mining Corporation
TSX VENTURE : POS

Polar Star Mining Corporation

May 13, 2008 10:08 ET

Polar Star-44 Metres of 0.71% Cu at Los Azules

TORONTO, ONTARIO--(Marketwire - May 13, 2008) - Polar Star Mining Corporation (TSX VENTURE:POS) ("Polar Star" or the "Company") announces preliminary results from three representative large samples taken from the Araya main pit and the first six diamond drill holes from the initial 2,500 metre program commenced January 2008 on its 7,471 hectare Los Azules Property, Tierra Amarillo District, Region III, Chile. A larger drill contracted from Major Drilling has been moved on site to follow up on these results and drill deeper into the primary mineralization. JVX Ltd. has also been contracted to complete Induced Polarisation (IP) and magnetic surveys to start in early June over the Araya breccia and a group of untested breccias to the north east.

Highlights

- Six main copper, uranium and gold targets identified to date by Polar Star's continuing geological and radiometric surveys

- Diamond drilling program underway on the 1,100 m long Araya main breccia

- Araya breccia is at the west end of a 1 km wide by 3-4 km long alteration system hosting a number of breccia bodies to be surveyed by JVX

- SRK Consulting retained to provide independent supervision and quality control with a view to preparing NI 43-101 compliant report



Araya Pit Sample Results

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Sample # Weight Cu Mo U Comments
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Kg % % ppm
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UGM01 69.8 0.64 0.023 133 Araya Main Pit, oxide
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UGM02 57.4 0.77 0.016 106 Araya Main Pit, oxide
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UGM03 56.9 3.27 0.043 1130 Araya Main Pit, oxide
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Diamond Drill Results

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Hole # From To Width Cu Mo U Comments
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(m) (m) (m) % % ppm
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LA-08-01 0.0 28.0 28.0 0.19 0.05 16 Leached Zone
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including 0.0 6.0 6.0 0.63 0.03 11
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28.0 56.0 28.0 0.50 0.01 7 Copper oxide zone
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including 28.0 44.0 16.0 0.71 0.01 7
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LA-08-02 0.0 44.0 44.0 0.13 0.04 13 Leached Zone
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including 44.0 70.0 26.0 0.66 0.07 18 Copper oxide zone
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70.0 104.0 34.0 0.10 0.02 38 Leached Zone
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including 80.0 86.0 6.0 0.10 0.02 149 U zone
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104.0 123.0 19.0 0.99 0.02 28 Copper oxide zone
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LA-08-03 0.0 42.0 42.0 0.67 0.01 14 Copper oxide zone
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including 18.0 42.0 24.0 1.10 0.01 19 Copper oxide zone
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LA-08-04 0.0 50.0 50.0 0.21 0.04 40 Leached Zone
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including 0.0 8.0 8.0 0.72 0.04 26
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50.0 66.0 16.0 0.46 0.00 8 Copper oxide zone
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LA-08-05 0.0 78.0 78.0 0.06 0.02 19 Leached Zone
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including 34.0 44.0 10.0 0.63 0.01 14 Copper oxide zone
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78.0 122.0 44.0 0.71 0.01 38 Copper oxide zone
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LA-08-06 0.0 14.0 14.0 0.81 0.05 25 Copper oxide zone
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14.0 34.0 20.0 0.05 0.02 11 Leached Zone
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34.0 62.0 28.0 0.39 0.01 24 Copper oxide zone
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Diamond Drilling Program

These initial six diamond drill holes complete two of a series of five fences of three holes each spaced about 200 metres apart along the long axis of the Araya breccia. This program is designed to investigate the three dimentional shape and copper-uranium-gold grade distribution within the upper oxidised section of the breccia. All six holes were collared in the leached and oxidized exposed top of the breccia and explored to a maximum depth of 150 metres. Two additional holes have been completed on several of the other sections for which assays are pending, however all intersected sections of copper oxides with the last and deepest intersecting a strong primary chalcopyrite and molybdenite zone. The new drill will complete the balance of the first five fences and drill additional deeper holes between them.

Property Description

The Los Azules property, located 800 kilometers north of Santiago, covers the historic Los Azules high grade oxide copper-gold mining district and is readily accessible by paved and good gravel road from the city of Copiapo sixty kilometers to the west. The property covers numerous post-magmatic hydrothermal collapse breccia pipes which are generally elliptical in plan, have long axis ranging from 5 metres to 1,100 metres. Primary mineralization in the pipes consists of chalcopyrite, pyrite (+/- gold), molybdenite, and galena. All the Azules pipes appear to contain uranium however, no uranium minerals have been identified to-date. A zone of surface oxidation up to 150 metres deep has produced a blanket of readily leachable green secondary copper minerals, including atacamite, chrysocola, brocanthite, copper wad and copper pitch.

NI 43-101 Report

Polar Star has retained the services of SRK Consulting's Santiago office (see 27 November 2007 press release) to prepare a National Instrument 43-101 compliant report on the Los Azules property.

Qualified Person

The drill program will be carried out under the direction of Mr. Terence Walker, M.Sc., P.Geo., qualified person within the meaning of National Instrument 43-101. Mr. Walker has reviewed the contents of this news release.

About Polar Star Mining Corporation

Polar Star was created to acquire advanced stage exploration properties focusing on gold, copper gold, and uranium. The Corporation's material assets include 17 projects in Chile, which are 100% owned and cover approximately 136,000 hectares.

Forward-Looking Statements

The statements made in this news release may contain forward-looking statements that may involve a number of risks and uncertainties. Actual events or results could differ materially from the Company's expectations and projections. Accordingly, readers should not place undue reliance on forward-looking statements. For a more detailed discussion of such risks and other factors, refer to Polar Star Mining Corporation's filings with Canadian securities regulators available on www.sedar.com or the Company's website at www.polarstarmining.com.

Share Capitalization:

Shares Outstanding: 31,303,698 as at May 13, 2008.

Business Television Feature:

Polar Star was selected and featured on Business Television in early March 2008. If you missed the show, please click on the link below to watch the full-feature http://www.b-tv.com/i/videos/PolarStar.wmv.

The Toronto Stock Exchange Venture has not reviewed and does not accept responsibility for the adequacy or accuracy of this release and the information contained herein.

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