Cornerstone Cap Resources Inc (fka CTNXF)

[relikwie]

THUNDERMIN AND CORNERSTONE FILE NI 43-101 TECHNICAL REPORT ON SEDAR IN
SUPPORT OF AN UPDATED LITTLE DEER MINERAL RESOURCE ESTIMATE
Toronto, Ontario, August 9, 2011 …… Thundermin Resources Inc. (“Thundermin”) (THR:TSX)
and 50% joint venture partner Cornerstone Resources Inc. (“Cornerstone”) (CGP:TSX-V) announce
that a National Instrument 43-101 (“NI 43-101”) Technical Report, to support the updated mineral
resource estimate for the Little Deer Copper Deposit (“Deposit”) that was announced on June 22, 2011,
has been filed on SEDAR and posted on each company’s respective website.
The Technical Report and Mineral Resource Estimate entitled “Technical Report and Resource Estimate
Update on the Little Deer Copper Deposit, Newfoundland, Canada, August 5, 2011” was prepared by
Mr. Eugene Puritch, P. Eng., President, P&E Mining Consultants Inc. (“P&E”) and Dr. Wayne Ewert, P.
Geo., Vice President, P&E, independent Qualified Persons (“QP’s”) in accordance with NI 43-101.
As reported on June 22, 2011, P&E estimates that the Deposit contains a 66% increase in Indicated
Resources of 1,911,000 tonnes at an average grade of 2.37% Cu (99.8 million lbs of copper) and a
61% increase in Inferred Resources of 3,748,000 tonnes at an average grade of 2.13% Cu (175.9
million lbs of copper) (see Table 1).
John B. Heslop, President and CEO of Thundermin said “We are extremely pleased that we were able to
surpass our goal of outlining five million tonnes of potentially economic grade copper mineralization on
the Little Deer property. We now await the completion of an internal scoping review for the project
which P&E expects to have completed mid-August, 2011. This study will provide management with
information on the economic viability of developing a new copper mine at Little Deer”.
Table 1: Summary of Little Deer Mineral Resources (P&E, June 20, 2011)

Resource Classification/Zone   Tonnes      Cu%   Cu lbs(M) 
 Indicated Mineral Resources 
 Little Deer Zone               1,911,000   2.37   99.8 
 Inferred Mineral Resources 
 Little Deer Zone               1,240,000   1.93   52.8 
 Footwall Zone                  1,711,000   2.04   77.0 
 Footwall Zone Splay            797,000     2.64   46.2 
 Total Inferred Resources       3,748,000   2.13   175.9

Notes:
1) Mineral resources which are not mineral reserves do not have demonstrated economic viability. The estimate of mineral
resources may be materially affected by environmental, permitting, legal, title, taxation, socio-political, marketing, or
other relevant issues.
2) The quantity and grade of reported Inferred resources in this estimation are uncertain in nature and there has been
insufficient exploration to define these Inferred resources as an Indicated or Measured mineral resource and it is
uncertain if further exploration will result in upgrading them to an Indicated or Measured mineral resource category.
3) The mineral resources in this press release were estimated using the Canadian Institute of Mining, Metallurgy and
Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM
Standing Committee on Reserve Definitions and adopted by CIM Council.
4) Ordinary Kriging was used for Cu grade interpolation.
5) Grade capping of 15% Cu utilized on composites.
6) A variable bulk density based on numerous field measurements was used for tonnage calculations.
7) A copper price of US$3.42/lb (May 31 2011 24 month trailing average) and an exchange rate of US$0.95=C$1.00 was
utilized to derive the 1% Cu cut-off grade. Mining costs were C$40/t, process costs were C$15/t and G&A was C$5/t.
Concentrate freight and smelter treatment charges were C$10/t mined. Concentrate mass pull was 7%, process recovery
was 97%, smelter payable was 96% and Cu refining was US$0.07/lb.
The Little Deer Copper Deposit is located approximately 10 km north of Springdale in north-central
Newfoundland. To date, the Deposit has been outlined to varying degrees of detail over a strike length
of approximately 1,050 m and to a vertical depth of approximately 1,000 m. The Deposit remains open
to the west and at depth and the potential for discovery of additional mineral resources is believed to be
high.