Constellation Copper Corporation to Proceed with

Bankable Feasibility Study on the Terrazas Copper-Zinc

Oxide Project, Chihuahua, Mexico

DENVER, COLORADO--(CCNMatthews - Apr 26, 2004) - Constellation Copper Corporation is pleased to nnounce it will proceed with a bankable feasibility study on the Terrazas copper-zinc oxide open pit heap leach project,[the Phelps Dodge Mining Company, for example, at its Morenci, AZ mine, has completely disassembled its smelter and has converted the mine to a mine-for-leach operation. It takes fewer employees and is more cost effective.] located in Chihuahua, Mexico. Drilling contractors Layne de Mexico S.A. de C.V. and Perforaciones Godbe de Mexico, S.A. de C.V. have been selected for a combined 20,000 meters of RC and core drilling. Drilling will define the mineral resources contained in the 2002 pre-feasibility study completed by Jacobs Engineering Group, provide core samples for additional column leach test work, test open extensions to the current mineral resource, and explore newly acquired ground peripheral to the existing resource. BSi Inspectorate has been selected for the

analytical work.....

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Asarco acted as the Atomic Energy Commission uranium ore-buyer in 1948

"Contracts for Atomic Energy Commission (AEC) procurement of these precipitates were extended in 1948. Furthermore, the AEC initiated plans to put three idle vanadium mills back to work, with production of uranium as their primary purpose. Toward this end, it purchased the plant at Monticello, Utah, in June 1948, from the War Assets Administration. The ore-purchasing agent is the American Smelting & Refining Co. By the end of the year negotiations were nearly complete for rehabilitation and operation of the plants at Durango and Uravan, Cob., by private companies. All five mills were expected to be operating before the end of 1949."