FOR IMMEDIATE RELEASE   
June 22, 2004

Wheaton River Minerals Ltd. (Vancouver, BC) announces an upgrade in the ore reserves at the Minera Alumbrera mining operation in Argentina, extending the mine life at Alumbrera by 2.5 years and ensuring gold production until mid-2015.

An ongoing ore delineation drilling program, undertaken within the existing ore envelope and for extensions at depth, has confirmed in excess of 80 million tonnes of additional ore reserves. Following re-optimization of the mine plan, based on a new geological model and improved metal prices ($350 per oz of gold and $0.90 per lb. Copper) and cost improvements has increased reserves by an additional 350,000 tonnes of copper and 1.2 million ounces of gold. The grade and cost profiles of the additional ore are expected to be in line with the previous life of mine plan. The additional ore was found predominantly in the north-western and northern domains of the pit, both inside and outside previous pit limits.

Ian Telfer Chairman and CEO of WRM said: "the extension of the mine life at Alumbrera adds significant value to Wheaton with the addition of over 450,000 ounces of gold reserves and over $200 million in additional cashflow over the life of the mine.”

Alumbrera will continue the intensive in-pit resource definition program with the objective of adding further ore reserves in the coming year. A new ore reserve statement for Alumbrera will be made available in the second half of the year based on the new geological model and the update of the pit topography at June 30, 2004.

For further information please contact Wheaton River Minerals Ltd. Investor Relations at 1-800-567-6223 or email at ir@wheatonriver.com or visit www.wheatonriver.com.