Century Mining Corporation

Century Mining Corporation

February 28, 2005 10:45 ET

Century Mining Reports Successful Drilling and Blasting at Sigma Mine


NEWS RELEASE TRANSMITTED BY CCNMatthews

FOR: CENTURY MINING CORPORATION

TSX VENTURE SYMBOL: CMM

FEBRUARY 28, 2005 - 10:45 ET

Century Mining Reports Successful Drilling and
Blasting at Sigma Mine

BLAINE, WASHINGTON--(CCNMatthews - Feb. 28, 2005) - Century Mining
Corporation (TSX VENTURE:CMM) is pleased to announce that significant
progress is being made at the Company's operations at the Sigma Mine in
Val d'Or, Quebec. Five blasts using 4 1/2 inch blast holes have been
successfully carried out in the open pit since February 22. The Company
is using electronic detonators and an emulsion product for blasting.
This results in better fragmentation of rock; improved floor control;
improved equipment productivity because the material is easier to dig;
and less dilution, which has a favourable impact on head grade and
operating costs. The improved fragmentation is the result of closer
blast hole spacing and smaller blast holes compared to previous practice.

As announced on February 22, the initial 12,000-metre
reverse-circulation (RC) drilling program has been completed. The drill
program has been extended and currently totals over 12,600 metres.
Reverse circulation drilling has proven to be very successful in
defining the ore blocks ahead of mining and will continue to be used to
assist in short-term mine planning. The Company purchased the RC drill
at the inception of the program. This results in greater economy in the
drilling. The mine now has an experienced crew of reverse circulation
drillers and samplers.

Over 5,000 samples collected from the RC drilling program have been
sampled and assayed to date. Sufficient data have been collected for
modeling and short-term mine planning purposes and to commence upgrading
the resource to a reserve. As previously reported, preliminary results
show better definition of ore/waste boundaries. The Company has chosen
to use a grade control method using 3-D solids modeling techniques that
are based on geological interpretation and assays from a combination of
the RC drilling and previous diamond drilling to define the ore zones to
be mined. This technique results in improved geological interpretation
when compared to conventional blast hole grade control techniques,
whereby only assays from vertical blast holes are utilized.

Currently, mining in the pit is progressing well with over 225,000
tonnes of ore and waste mined to date. The blast hole assays are being
studied to determine if they can be used to enhance the existing grade
control techniques. The initial results, using 5-foot sample lengths,
have been encouraging and have prompted the Company to examine an
automated sampler for its new Tamrock drills that would automatically
collect and riffle the entire cuttings for each 5-foot section of the
hole. This would provide an excellent sample of the coarse, nuggety gold
found in the veins in the open pit.

Ore has been fed to the primary crusher to build a stockpile ahead of
the mill. Milling is expected to commence on March 14. The Company
continues to anticipate production of approximately 90,000 ounces of
gold in 2005.

Margaret Kent, Chairman and CEO of Century Mining said: "We have
developed a real understanding of the deposit and the issues and
problems that plagued the previous operator. With more than one million
ounces of gold in resources in the Sigma pit and an additional three
million ounces of gold in resources elsewhere at the Sigma and Lamaque
properties, we are confident that we will be mining in this camp for may
years to come".

On behalf of the Board of Directors,

Margaret M. Kent, Chairman, President & C.E.O.

This press release contains forward-looking statements within the
meaning of Section 27A of the Securities Exchange Act of 1933 and as
amended in Section 27E of the 1934 Act.

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Contact Information

  • FOR FURTHER INFORMATION PLEASE CONTACT:
    Century Mining Corporation
    Graham Eacott
    Vice President, Investor Relations
    (360) 332-4653
    (360) 332-4652 (FAX)
    geacott@centurymining.com
    or
    Century Mining Corporation
    Michael Wood
    Communications Director
    (360) 332-4653
    (360) 332-4652 (FAX)
    mwood@centurymining.com
    www.centurymining.com
    The TSX Venture Exchange has not reviewed and does not accept
    responsibility for the adequacy or accuracy of the contents of this
    press release.