Red Back Mining Inc.
TSX : RBI

Red Back Mining Inc.

September 08, 2005 13:45 ET

Red Back Makes New Gold Discovery in Ghana

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - Sept. 8, 2005) - Red Back Mining Inc. (TSX:RBI) (the "Company") reports that the Company's regional exploration program on its extensive (5,635 sq. km.) mineral land holding in Ghana has been successful in identifying a new gold discovery.

The 627 sq. km. Enchi Project is located between 40 and 90 kilometres south of the Company's Chirano gold mine and straddles the Bibiani Shear Zone which hosts Chirano and the Bibiani gold mine (+5 million ounces) owned by Anglogold Ashanti. In early 2005 the Company commenced first pass trenching (1,833 metres) and Rotary Air Blast (RAB) drilling (+5,000 metres) programs on two gold-in-soil anomalies at Enchi: the Boin Valley East anomaly and the Boin Valley West anomaly (News Release November 15, 2004).

Boin Valley East

The northern 2.2 kilometres of the 4.5 kilometre long +100ppb Boin Valley East anomaly has been tested with 5 trenches and 44 shallow RAB drill holes to a maximum depth of 70 metres.

Based upon the limited amount of testing to date it is interpreted that two gold mineralized zones 500 metres apart have been identified, both dipping shallowly to the west in very heavily weathered Birimian volcanics and sediments. The eastern zone extends over a strike length of 600 metres and comprises numerous low grade trench and RAB intercepts within an anomalous halo up to 45 metres wide. The western zone has only been intersected in one trench to date (SWTR 1 - 60m @ 0.80g/t). Several drill intercepts were also recorded in an intermediate zone between the two main zones and a trench located 800 metres south of the RAB drilling has returned very wide low grade intercepts (SSTR 1 - 249m @ 0.45g/t).

The zones of the Boin Valley East anomaly remain open in all directions. Significant results include:



Boin Valley East Trench Intercepts

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INTERSECTION INTERVAL GRADE
TRENCH ZONE (m) (m) (g/t Au)
----------------------------------------------------------
SWTR 1 West 0-60 60 0.80
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SWTR 4 East 50-80 30 0.64
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SSTR 1 South 68-317.4 249.4 0.45
----------------------------------------------------------
Incl. 68-112 44 0.57
----------------------------------------------------------
Incl. 160-230 69 0.55
----------------------------------------------------------
Incl. 288-315.8 27.8 0.77
----------------------------------------------------------


Boin Valley East RAB Drilling Intercepts

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DEPTH INTERCEPT GRADE
HOLE ZONE NORTHING (m) (m) (g/t Au)
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SWRB012 Intermediate 20800 2-11 9 1.29
--------------------------------------------------------------------
38-53 15 0.48
--------------------------------------------------------------------
SWRB015 Intermediate 20800 2-11 9 0.83
--------------------------------------------------------------------
SWRB016 East 20800 47-65 18 0.53
EOH
--------------------------------------------------------------------
SWRB017 East 20800 14-26 12 1.05
--------------------------------------------------------------------
SWRB018 East 20800 2-23 21 0.72
--------------------------------------------------------------------
SWRB023 East 21000 26-42 18 0.44
--------------------------------------------------------------------
SWRB028 East 21200 23 24 0.68
--------------------------------------------------------------------
SWRB041 Intermediate 21200 26 15 0.72
--------------------------------------------------------------------
SWRB044 Intermediate 20400 35 18 0.71
--------------------------------------------------------------------

Note: 1. EOH means end of hole
2. There is insufficient drilling to determine true width of
down hole drill intercepts


Boin Valley West

Only 1.4 kilometres of the 4.5 kilometre long Boin Valley West gold-in-soil anomaly has been tested by 736 metres of trenching and 58 RAB holes. Trench testing of the anomaly was ineffective due to deep and extensive mottled clays. Two sub-parallel zones of mineralization have been intersected with a current combined strike of 800 metres. On the southern most section (3800mN) the mineralized zone is 50 metres in width. The mineralisation remains open along strike in both directions. Significant RAB drill intersections include:



Boin Valley West RAB Drilling Intercepts

----------------------------------------------------------
DEPTH INTERCEPT GRADE
HOLE NORTHING (m) (m) (g/t Au)
----------------------------------------------------------
KBRB006 4800 29-41 12 1.60
----------------------------------------------------------
KBRB041 4200 47-53 6 1.77
----------------------------------------------------------
KBRB042 4200 17-38 21 0.70
----------------------------------------------------------
KBRB049 3800 0-17 17 1.53
----------------------------------------------------------
KBRB050 3800 2-14 12 0.76
----------------------------------------------------------
KBRB051 3800 2-17 15 3.00
----------------------------------------------------------
KBRB052 3800 2-11 9 1.13
----------------------------------------------------------


Management is encouraged by the strike length and width of gold mineralisation at both the Boin Valley East and Boin Valley West discoveries which suggest the presence of large mineralized systems within a sequence of quartz veined and stockworked mafic intrusives, black shales and volcanics, in close proximity to a Birimian mafic sediment contact.

Intersections at Boin Valley were recorded in highly weathered bedrock lithologies and it is unclear at this point if the grade of the mineralization has been enriched or depleted by weathering processes. Additional drilling will provide more certainty on true widths and gold grade in the primary zones.

A further trenching program over the soil anomalies is in progress. A 6,000 metre reverse circulation drilling program will commence in October 2005 at both prospects to determine the continuity of mineralisation at depth and along strike and if warranted to advance the prospects to resource status.

It is interpreted that the Boin Valley discoveries are associated with a series of thrust repetitions of the main belt margin contact located within the Enchi Project two kilometres to the west. Previous explorers have targeted gold mineralization within basin sediments some distance to the east of the belt margin. These programs have identified several narrow high grade deposits. However, the Company's ongoing program of detailed soil sampling, prospecting and geological mapping has focused on a zone in proximity to the main belt margin where most major gold deposits in Ghana are located.

Commenting on the discoveries at the Enchi Project, Richard Clark, President and CEO of the Company stated:

"The discovery of extensive gold mineralization at Enchi is the direct result of the systematic exploration programs Red Back is employing on its large mineral land holdings in Ghana. Doing it right takes time when you are dealing with the evaluation of projects encompassing hundreds of square kilometres. This patience is paying off at Enchi and on other of our projects in Ghana. Our goal is to be a multi mine producer in Ghana and Enchi is certainly a step in the right direction."

The Chirano Gold Project is located in Ghana, West Africa with proven and probable reserves of 17.8 million tonnes grading 1.9 g/t gold for approximately 1.09 million ounces contained gold (RSG Global - December, 2004) There is significant resource and reserve upside through both brownfields and greenfields exploration. The Chirano Project is within the Bibiani gold belt 25 kms along strike from AngloGold Ashanti's (+5 million ounces) Bibiani gold mine. In addition to Chirano, the Company retains one of the largest mineral land positions in Ghana (5,000 sq. kms) and is systematically exploring this land holding.

The technical contents of this release have been reviewed by Ross Ashton, BSc, FAusIMM, a Qualified Person pursuant to NI-43101. Mr. Ashton is a Director of the Company. Samples are prepared and analyzed by fire assay using a 50 gram charge at the Analabs facility in Bibiani, Ghana in compliance with industry standards. Field duplicate samples are taken and blanks and standards are added to every batch submitted. Selected samples from this lab are check assayed each month at other Analabs laboratories worldwide.

On behalf of the Board of Directors

Richard P. Clark, President


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