Mount Pearl, NL, Canada: Cornerstone Capital Resources Inc. ("Cornerstone") (TSXV-CGP) (F-GWN) (B-GWN) (OTC-CTNXF) and 50% joint venture partner Thundermin Resources Inc. ("Thundermin") (THR:TSX) announce that they have intersected 2.8% Cu over a core length of 18.2 m, including 5.2% Cu over 4.2 m and 3.4% Cu over 3.5 m, in an on-going initial diamond drilling program on their 100% owned, past-producing Whalesback Copper Mine ("Mine"). The Mine, which was in production from 1965 -- 1972, is located approximately 10 km north of Springdale in north-central Newfoundland and approximately 800 m north of the 100% owned Little Deer Copper Deposit ("Deposit") (see Figure 1 and Table 1).

Table 1: Whalesback Drill Results (2011-2012)

Hole No.	NAD 83 UTM Zone 21		Dip (o)	Az (o)	From (m)	To (m)	Interval* (m)	Cu (%)
	Easting	Northing
WB-11-100	571,528	5,493,983	-43.9	329.9	51.4	51.8	0.4	0.9
WB-11-101	571,560	5,493,911	-43.0	336.1	122.8	124.5	1.7	3.4
WB-11-102	571,560	5,493,911	-62.5	334.9	163.8	164.0	0.2	12.6
and					169.0	170.0	1.0	1.5
WB-11-103	571,534	5,493,873	-48.8	332.6	172.7	173.6	0.9	1.4
WB-12-104	571,725	5,493,778	-62.8	324.6	376.9	395.1	18.2	2.8
including					376.9	381.1	4.2	5.2
including					390.1	393.6	3.5	3.4
and					403.0	405.0	2.0	2.6
WB-12-105	571,725	5,493,778	-65.9	332.9	402.8	403.2	0.4	7.5
and					468.0	475.0	7.0	1.6
including					472.0	475.0	3.0	2.2
and					483.7	484.4	0.7	1.3

Notes:
1) * The reported copper intersections are core lengths. The true thicknesses of the various copper intersections are highly variable due to the stringer nature of the mineralization.

The purpose of the current drill program, comprising approximately 4,000 metres of drilling in 13-15 holes, is to discover additional copper resources at relatively shallow depths adjacent to the Mine below and to the west of the old mine workings and to confirm historical drill intercepts in undeveloped areas of the Mine for the purposes of National Instrument 43-101 ("NI 43-101"). A digital compilation of historical diamond drill hole assay data recovered from the archives of the Newfoundland and Labrador Department of Natural Resources in St. John's suggests that there is excellent potential for the discovery of additional copper resources at the Mine (see news release dated October 20, 2011). The discovery of any new copper resources at the Mine could, because of their proximity to the Deposit, expand the total mineral resources available for mining and enhance the overall economics of establishing a new mining operation at Little Deer. At this time, the potential discovery of additional mineral resources at the Mine is conceptual in nature and it is uncertain whether further diamond drilling will result in the discovery of additional mineral resources.

All holes completed to date have intersected copper mineralization with the most significant copper intervals being in holes 104, 105 and 101 (see Table 1 and Figure 1). Hole WB-12-104 intersected 2.8% Cu over a core length of 18.2 m, including 5.2% Cu over 4.2 m and 3.4% Cu over 3.5 m. This hole was drilled to confirm the copper mineralization intersected in historical hole 9-43 which assayed 4.0% Cu over 3.4 m and 4.5% Cu over 6.1 m and for which no assay data was available in the historical drill log. Hole WB-12-105 intersected 7.5% Cu over 0.4 m and 1.6% Cu over 7.0 m, including 2.2% Cu over 3.0 m. This intersection, which is the easternmost hole drilled to date at this depth on the Mine, occurs 90 m below hole 104 and 50 m east of historical hole 11-12 which intersected 1.6% Cu over 5.8 m. Hole WB-11-101 intersected 3.4% Cu over 1.7 m at a depth of approximately 75 m below surface, west of the area mined previously. The drill results to date confirm historical copper intercepts and suggest that the Whalesback deposit remains open to the east, west and at depth.

Preliminary Economic Assessment ("PEA") - Little Deer Copper Deposit
On November 1, 2011, Cornerstone and Thundermin announced the results of a positive PEA for the Deposit. The PEA indicated that there is potential to develop the Deposit on an attractive economic basis at current metal prices (see news release dated November 1, 2011 and Technical Report filed on SEDAR on December 15, 2011).

Mineral Resource Estimate - Little Deer Copper Deposit
On June 22, 2011, Cornerstone and Thundermin reported a NI 43-101 compliant mineral resource estimate for the Deposit comprising Indicated Resources of 1,911,000 tonnes at an average grade of 2.37% Cu (99.8 million pounds of copper) and Inferred Resources of 3,748,000 tonnes at an average grade of 2.13% Cu (175.9 million pounds of copper). The mineral resource estimate was prepared under the supervision of Mr. Eugene J. Puritch, P. Eng., President of P&E Mining Consultants Inc. of Brampton, Ontario. Mr. Puritch is an independent Qualified Person ("Q.P.") in accordance with NI 43-101.

Qualified Person
Mr. Andrew Hussey, P.Geo., Project Geologist and Lands Manager, Cornerstone Resources Inc., is the Q.P. responsible for supervising the drilling program for the purposes of NI 43-101. All holes drilled by Cornerstone and Thundermin are NQ in size. Bulk density measurements, rock quality designations 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, Newfoundland and the remaining half of the core is kept for future reference. Blanks, duplicates and standards are routinely used as part of the assay procedures.

Little Deer Joint Venture
Under the terms of its joint venture agreement with Cornerstone, Thundermin 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 Deposit and the terms of the agreement with Cornerstone can be found in numerous news releases between May 1, 2007 and November 1, 2011 and on Cornerstone's and Thundermin's respective websites and on SEDAR.

Other News
Cornerstone announces the termination of option agreements on the following Canadian properties:

1) Redcliff - Deer Harbour (Copper) properties - Optioned to Vale Exploration Canada Inc. (see news release dated May 04, 2010); and

2) Letitia Lake (REE) Property - Optioned to Rare Earth Metals Inc. (see news release dated February 16, 2010)

These 100% owned properties have been returned to Cornerstone, and over the next several months, all exploration results will be reviewed in order to determine what additional work may be warranted.

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