MICREX DEVELOPMENT CORP.

A mineral exploration and development company operating in Canada and the United States

TSX Venture Exchange symbol "MIX"
SEC 12 g (3) Exemption 82-4281

For immediate release

September 14, 2004

Update on Bighorn and Burmis Activities

Micrex announced today that it will be mobilizing a team from Apex Geoscience to the Bighorn Property in northern B.C. for the last half of September.

This exploration crew will be tasked with following up on the positive assay results from previous exploration.

As reported in the Micrex July 29, 2002 press release:

“The exciting assay results (gold assays as high as 121.16 grams (3.9 oz.) per tonne, silver assays as high as 56.9 grams (1.83 oz) per tonne) reported in the news release of June 26, 2002 encouraged Micrex to stake a large area covering the remainder of the potential mineralized zone.

Micrex believes there is a high probability that the high-grade vein system, found at the existing mine site, represents only a small part of the mineral potential in the area.

Micrex wanted to evaluate other structures and rock types with the idea that they might offer the potential for a bulk tonnage deposit and the recent sampling program has confirmed this approach as assays from this new area gave values as high as 18.25 grams (0.586 oz) of gold per tonne.

Silver assayed as high as 8.8 grams (0.283 oz) per tonne.”

Since the mineralized zone is quite large this will be a helicopter assisted program allowing a high degree of mobility and access to all parts of the property.

It is expected that this exploration phase will tighten the data to a degree sufficient to define drill targets on the property.

Work continues on the extensive drill sampling program carried out at the Burmis Magnetite Property. Over two hundred samples were submitted for assay. Once the assays are completed Apex Geoscience will be able to map the drilled areas in detail, enabling Micrex to complete mine planning which is an integral part of the revised permit application.

Further information may be obtained from Perry Meszaros or S.E. Marshall at (780) 448-0922
or email at mixinfo-1@micrex.net

MICREX DEVELOPMENT CORP.

Peace River Diamond Property • Burmis Magnetite/Titanium Property • St. Charles de Bourget Magnetite/Titanium Property • Fort Steel Placer Property • Bighorn Gold Mine • Banks Gold Mine • Mount Royal Gold Mine • Deadwood Gold Mine • Sunburst Gold Property

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