Toronto, December 15, 2011 (TSX: LUN; OMX: LUMI) Lundin Mining Corporation (?Lundin Mining? or the ?Company?) is pleased to provide an interim report on exploration activities including an initial Inferred Resource for the Semblana Copper Deposit located adjacent to its 100% owned Neves-Corvo mine in southern Portugal.

Highlights

• Initial Inferred Resource for the Semblana Copper Deposit of 6.58 million tonnes at a grade of 3.0% copper and 24 g/t silver is reported in accordance with the definitions in the Canadian National Instrument 43-101 (NI 43-101).
• Potential for width, strike and depth extensions of this initial copper-silver resource is considered excellent. 
• Hole PSM46B-1, which is included in the initial resource reported herein, intercepted 20.5 metres of massive sulphides grading 6.1% Cu; including a high-grade interval of 5.0 metres of 16.0% Cu. 
• A new zone of high-grade copper sulphides, which is not included in the initial resource reported herein, has been discovered approximately 300 metres to the south of the initial resource.  Step-out hole PSR42, at a starting depth of approximately 930 metres, intercepted 14 metres of massive sulphides including a 5.0 metre interval grading 4.6% Cu. A second step-out hole, PSQ44, located approximately 80 metres to the northeast of PSR42, intercepted 8.4 metres grading 5.2% Cu at a starting depth of 920 metres.
• A new copper discovery has been made approximately 1.4 km south of Semblana and approximately 1.3 km southeast of the Zambujal copper-zinc orebody.  Hole SCA26, intercepted a 32.5 metre thick section of strong stockwork-type copper sulphides grading 2.2% Cu including a higher grade interval of 11.0 metres grading 3.9% Cu.
• At the Clare Project in Ireland, a potential new zone of high-grade zinc-lead-silver mineralization, including 16.3 metres of 10.2% Zn+Pb, 22 g/t Ag in Hole 11-3679-161 at a starting depth of 601 metres, has been discovered approximately 750 metres west of the original Kilbricken discovery hole.
• Also in Ireland, a new grassroots zinc-lead discovery has been made in the Lakelands Project, located in County Leitrim, 80 km west of the Tara Mine.