Red Back Mining Inc.
TSX : RBI

Red Back Mining Inc.

December 04, 2006 13:03 ET

Red Back Reports Positive Results From Preliminary Akwaaba Metallurgical Testwork

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - Dec. 4, 2006) - Red Back Mining Inc. (the "Company" or "Red Back") (TSX:RBI) is pleased to announce results from a first round of metallurgical test work on samples from the Akwaaba high grade underground mineralisation (Indicated Resource of 3.197Mt grading 6.56g/t for 674,000oz, Inferred Resource 0.78Mt grading 8.8g/t for 221,000oz. See press release November 16th 2006).

Results of the testwork are set out below.



---------------------------------------------------
Sample Number Head grade Au g/t % Total Recovery
---------------------------------------------------
HS 14324 6.44 92.3
---------------------------------------------------
HS 14325 6.65 92.5
---------------------------------------------------
HS 14326 24.85 91.5
---------------------------------------------------
HS 14327 6.65 89.5
---------------------------------------------------
HS 14328 8.95 93.4
---------------------------------------------------
HS 14329 12.90 88.8
---------------------------------------------------
HS 14330 80.23 93.7
---------------------------------------------------


Composite samples of quarter core (NQ) were submitted to AMMTEC Ltd, of Perth, Western Australia representing the full suite of geological ore types taken at depths throughout the Resource.

The average recovery for the samples was 91.7%. Cyanide consumption was low, averaging 0.3kg/t with the ore exhibiting fast leach kinetics and the majority of leaching occurring within the first 6 hours.

Leach testwork indicates similar good performance to the current operating ore bodies at the company's Chirano Gold Mine indicating that no plant modifications would be required to treat the Akwaaba ore.

Commenting on the metallurgical results, Richard Clark, President and CEO of the Company stated, "The development of a high grade underground mine at Akwaaba will significantly impact the Chirano operation. These results confirm that the Akwaaba ore will blend easily with ore from the other Chirano deposits and that no plant modifications will be required. Red Back is now working to complete a scoping study on Akwaaba to define the optimal development route in the first quarter 2007. This study will immediately be followed by a full feasibility study".

The technical contents of this release have been reviewed by Hugh Stuart, BSc., MSc, a Qualified Person pursuant to NI-43101. Mr. Stuart is the VP - Exploration of the Company and a Member of the Australasian Institute of Mining and Metallurgy. This News Release contains forward looking statements which are subject to a variety of risks and uncertainties which could cause actual events or results to differ materially from those reflected in the forward looking statements. The Company does not intend to update this information and disclaims any legal liability to the contrary.

On behalf of the Board of Directors

Richard P. Clark, President


Contact Information