Xtierra Inc (XAG)

[MWM]

Minco plc
www.mincoplc.com
Minco Plc (Minco) is a precious and base metals exploration and development company with silver projects in Mexico and zinc exploration in Ireland. Minco’s 23.6% jointly controlled operation with Xstrata Zinc covers exploration licenses, totaling 294 square kilometers located at Pallas Green between Limerick and Tipperary. Drilling has resulted in the discovery of four sulphide lenses at Castlegarde, Tobermalug, Caherconlish South and Srahane West. The Pallas Green Property near Limerick is a zinc-lead exploration project and had 13 drilling rigs operating as of December31, 2007. In July 2007, Minco incorporated a Canada-based subsidiary, Orca Minerals Limited (Orca), to hold interests in the Bilbao, Laguna and Zacatecas exploration properties. On June 14, 2007, the Company announced the sale of its 50% interest in Minera Sisa to Silverex SA de CV, a Mexican Company allied to Minco’s existing partner on the project. .