Thundermin Resources Inc.

Thundermin Resources Inc.

May 15, 2008 16:30 ET

Thundermin and Cornerstone Intersect 3.1% Copper Over 7.2 Metres at the Little Deer Copper Deposit in Newfoundland

TORONTO, ONTARIO--(Marketwire - May 15, 2008) - Thundermin Resources Inc. ("Thundermin")(TSX:THR) and 50% joint venture partner Cornerstone Resources Inc. ("Cornerstone")(TSX VENTURE:CGP) announce that they have intersected 3.1% Cu and 0.03% Co over a core length of 7.2 m, at a vertical depth of approximately 588 m, in hole LD-98-07A on the Little Deer copper property (Table 1, Figure 1). This drilling is part of an on-going, $1,000,000 exploration program on the Little Deer copper property which is located approximately 10 km north of Springdale in north-central Newfoundland.

Table 1: Little Deer Drill Results

Hole No. East North Dip Az From To Inte- Cu Co Zn Au
(m) (m)(deg- (deg- rval
rees) rees) (m) (m) (m)(1) (%) (%) (%)(g/t)
LD-98-07A 13596 4541 -70 325 530.0 530.1 0.1 12.2 0.01
537.4 540.1 2.7 1.45 1.24
593.8 599.7 5.9 1.76
616.5 623.7 7.2 3.12 0.03
LD-98-07B 13596 4541 -70 325 Hole stopped due to drilling problems
LD-98-07C 13596 4541 -70 325 497.3 501.9 4.6 Assays pending
542.5 556.5 14.0 Assays pending
LD-98-07D 13596 4541 -70 325 Currently drilling.

(1)Reported intervals are core lengths

Hole LD-98-07A is a wedge cut from historical hole LD-98-07, which intersected 2.9% Cu over a core length of 5.8 m at a vertical depth of approximately 535 m. The 7.2 m copper intersection in hole LD-98-07A is located approximately 22 m east and 53 m below the original intersection in hole LD-98-07 and approximately 50 m above and 100 m west of the intersection in hole LD07-02, which assayed 1.2% Cu over 25.5 m, including 2.5% Cu over 5.5 m. This new intersection consists of stringer, disseminated and minor semi-massive chalcopyrite-pyrrhotite mineralization within strongly altered mafic volcanic rocks. Hole LD-98-07A also intersected two zinc-rich intervals, one of which contains elevated gold values. These two intervals contain the most zinc mineralization encountered to date on the property but their significance, along with the elevated gold values, is unknown at the present time.

Hole LD-98-07C, which has just recently been completed, intersected two mineralized zones which occur in chlorite-altered, mafic volcanic rocks. The 4.6 m upper zone, from 497.3 m to 501.9 m, contains stringer, semi-massive and disseminated chalcopyrite-pyrrhotite-pyrite mineralization while the 14.0 m lower zone, from 542.5 m to 556.5 m, contains mainly disseminated to stringer chalcopyrite-pyrrhotite-pyrite mineralization. The lower sulphide intersection in hole LD-98-07C occurs approximately 33 m east of hole LD-98-07 at a vertical depth of approximately 515 m. Hole LD-98-07D has commenced and is planned to intersect the mineralized horizon approximately 50 m above hole LD-98-07.

The current drilling program is designed to define the continuity, grade and distribution of high-grade copper mineralization previously intersected in the eastern portion of the property, which remains open to the east, west and at depth. Thundermin and Cornerstone also plan to re-enter holes LD-00-12 and LD-07-02, which along with hole LD-98-07, have intersected ore-grade copper mineralization over mineable widths over a strike length of approximately 300 m and at vertical depths from 535 to 630 m. The data obtained from this drilling will be used to undertake a resource calculation for the Little Deer deposit.

Downhole Pulse EM geophysical surveys were completed in April 2008 on holes LD-08-09 and LD-08-10, in the west, and holes LD-07-03 and LD-07-08, in the east by Eastern Geophysics Limited (Figure 1). Only the interpretation of the results for hole LD-08-10 has been received to date. Holes LD-08-09 and LD-08-10 were drilled to test the western extension of a surface DEEPEM geophysical conductor which is co-incident with high-grade copper mineralization on the eastern portion of the property. Hole LD-08-10 did not intersect any sulphide mineralization, however, the downhole Pulse EM results show a strong, 20 channel response at the end of the hole which suggests the possibility for the occurrence of a sizeable conductive body with the potential for a significant depth extent below the area tested by hole LD-08-10. Hole LD-08-10 will be extended a minimum of 100 m in order to intersect this conductive target.

Thundermin and Cornerstone have the option, on a 50/50 basis with Thundermin as operator, to earn a 100% interest in the Little Deer copper deposit and adjacent property from Weyburn Investments Ltd. Under the terms of the agreement, Thundermin and Cornerstone committed to spend $850,000 in exploration and development work on the property on or before June 20, 2009, which commitment has been met. Thundermin, under its joint venture agreement with Cornerstone, has the right to increase its interest in the Little Deer property to 75% by completing a feasibility study and by arranging 100% of the necessary bank financing required to place the property into commercial production. Details on the Little Deer copper deposit and the terms of the agreement with Weyburn can be found in news releases dated May 1, June 21, July 9, October 30, December 11, 2007 and January 24 and April 9, 2008 and on Thundermin's and Cornerstone's respective websites and on SEDAR.

Mr. Andrew Hussey, P.Geo., Project Geologist and Lands Manager, Cornerstone Resources Inc., is the qualified person that is responsible for supervising the drilling program on the property for the purposes of National Instrument 43-101. Mr. Hussey has reviewed and approved the contents of this release. All 2007 and 2008 drill holes are NQ in size. Specific gravity, rock quality determinations and photographic logging of significant mineralized intersections are performed systematically prior to assaying. The core is logged and the mineralized sections, where appropriate, are sawn in half at a core logging facility in Springdale. Half of the core is submitted for analyses to Eastern Analytical Limited, an independent and qualified assayer located in Springdale. The remaining half of the core is kept for future reference. Blanks, duplicates and standards are routinely used as part of the assay procedures.

Forward-Looking Statements

This news release may contain "Forward-Looking Statements" that involve risks and uncertainties, such as statements of Thundermin's plans, objectives, strategies, intentions and expectations. The words "potential," "anticipate," "forecast," "believe," "estimate," "expect," "may," "project," "plan," and similar expressions are intended to be among the statements that identify "Forward-Looking Statements". Although Thundermin believes that its expectations reflected in these "Forward-Looking Statements" are reasonable, such statements may involve unknown risks, uncertainties and other factors disclosed in our regulatory filings that can be viewed on the SEDAR website at For us, uncertainties arise from the behaviour of financial and metals markets and from numerous other matters of national, regional, and global scale, including those of an environmental, climatic, natural, political, economic, business, competitive, or regulatory nature. These uncertainties may cause our actual future results to be materially different than those expressed in our "Forward-Looking Statements". Although Thundermin believes the facts and information contained in this news release to be as correct and current as possible, Thundermin does not warrant or make any representation as to the accuracy, validity or completeness of any facts or information contained herein and these statements should not be relied upon as representing its views subsequent to the date of this news release. While Thundermin anticipates that subsequent events may cause its views to change, it expressly disclaims any obligation to update the "Forward-Looking Statements" contained herein.

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To view 'Figure 1', please visit the following link:

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