VANCOUVER, BRITISH COLUMBIA–(Marketwired – May 31, 2013) – Mercator Minerals Ltd (TSX:ML) (“Mercator” or the “Company”) announces that as of June 1, 2013 Gary Simmerman, will become a consultant to the Company and will cease to be an officer of the Company.

“Since 2007, Gary has been instrumental in the planning, construction and operation of Mineral Park mine from a small copper heap leach operation into a large scale, long life open pit mine. We want to thank Gary for his dedication and loyalty and very pleased that we can continue to draw upon Gary’s expertise in his consulting capacity,” commented Bruce McLeod, Mercator’s President and CEO. “Since the appointment of Joe Campbell as General Manager, Mineral Park in July 2012, Joe and his team have overseen significant improvements in recoveries, throughput, and safety performance which have been reported in Mercator’s quarterly operational performance. As a result, we believe that we have an outstanding team in place at the Mineral Park Mine to ensure continued progress on optimizing operations over the coming months.”

The Company also announces that the contract with Craig Smith, Project Manager, Mineral Park has expired with Mr. Smith’s responsibilities having been taken over by Mr. Campbell and his operational team.

“On behalf of the Company, we thank Craig for his services and wish him all the best in his future endeavours,” stated Mr. McLeod.

About Mercator Minerals Ltd.

Mercator Minerals Ltd., a TSX listed Canadian mining company with one of the fastest growing base metal profiles in its peer group, is a leading copper, molybdenum and silver producer with a diversified portfolio of high quality operations and projects in the USA and Mexico. Mercator provides investors exposure to current copper, molybdenum and silver production from the large tonnage long life Mineral Park Mine in Arizona, as well as mid-term exposure to copper at the El Pilar deposit in the State of Sonora in northern Mexico and longer term exposure of molybdenum and copper through the development of the El Creston deposit also in the State of Sonora in northern Mexico.

On Behalf of the Board of Directors

MERCATOR MINERALS LTD.

D. Bruce McLeod, P.Eng, President and CEO