Mwana Africa PLC - Copper update: Democratic Republic of Congo - Further positive drilling results at Kibolwe prospect



    LONDON, Feb. 26 /CNW/ - The Kibolwe Prospect is situated 160 km northwest
of Lubumbashi in the northern portion of the 9,689 square kilometre SEMHKAT
licence area.
    The Kibolwe mineralization is a sediment-hosted stratiform copper deposit
which occurs within Neoproterozoic Katangan Supergroup rocks of the Central
African Copperbelt. The dominant copper oxide mineral is malachite with minor
amounts of cuprite and tenorite which occur mainly in argillaceous carbonates
and the shale units.
    Exploration undertaken during the 2006/7 field season at Kibolwe has
identified further significant concentrations of secondary enriched copper
oxides. A broad mineralized zone 200-400 metres in width which extends over a
strike length of 1,000 metres has been outlined.
    A program comprising a total of 10,300 metres of reverse circulation
percussion ("RCP") drilling had been completed by October 2007 at Kibolwe
Main. A total of 7,487 samples have been submitted to ALS Chemex Analytical
Laboratories in Johannesburg. Assay and results have been returned for
4,597 samples and the remaining 2,890 sample results are expected before the
end of the first quarter of 2008. Subsequent to the Company's previous Kibolwe
announcements (see press releases June 2007 and November 2007) in which assay
results from 40 RCP were released, Mwana advises that it has received assay
results from an additional 20 infill RCP holes totalling 981 metres (AW15,
C20, D18, D19, E15, G16, J8, O13, O14, O15, P13, P14, P15, P17, R14, R21, S15
and S16) which were drilled along 1,000m of strike. All RCP holes that
contained copper intercepts greater than 2% Cu developed over a sample width
of 4m are listed in Table 1 below, and are indicated in the accompanying map.
Borehole R14 intersected 11% copper over a 2m width at 12m below the surface.
These enriched zones are a characteristic of the Kibolwe style of
mineralization. The mineralized zone is continually being extended as further
borehole results are received. Overall mineralisation from the drilling
campaign varies as follows: At 0.5% Cu cut-off, width of mineralisation ranges
from 1-48m (down-hole width), and grade considered over widths equal to or
greater than 2m ranges 0.5%-11.1%. The maximum value returned to date is 1m @
28.3%Cu.
    Digital Mining Services in Harare is currently preparing a resource
estimate which should be completed in the second quarter of this year.
Depending on the outcome of the mineral resource estimate, it will be
immediately followed by the pre-feasibility study, with a decision whether to
mine anticipated by the end of 2008.

    
        Table 1. Kibolwe Project, Current sampling results for mineralized
        ------------------------------------------------------------------
        zones from the 2006-2007 RC drilling programme, (intersections in
        -----------------------------------------------------------------
                         excess of 2% Cu over 4m)(*).
                         ----------------------------

             ------------------------------------------------------
             Hole ID      From        To       Cu%       Width (m)
                           (m)        (m)               (Down Hole)
             ------------------------------------------------------
             AW15          63         70       2.60           7
             ------------------------------------------------------
             C20           15         20       2.54           5
             ------------------------------------------------------
             D18           26         31       2.82           5
             ------------------------------------------------------
             D19           31         36       2.72           5
             ------------------------------------------------------
             E15            4         26       2.63          23
             ------------------------------------------------------
             G16            3         13       2.00          10
             ------------------------------------------------------
             J8            45         52       2.05           7
             ------------------------------------------------------
             O13            6         21       2.25          15
             ------------------------------------------------------
             O14            5         37       2.23          31
             ------------------------------------------------------
             O15           53         57       2.91           4
             ------------------------------------------------------
             P13            7         17       6.41          10
             ------------------------------------------------------
             P14            2          5       2.98           4
             ------------------------------------------------------
             P15            8         50       2.22          42
             ------------------------------------------------------
             P17           18         22       2.28           4
             ------------------------------------------------------
             P17           56         60       2.89           4
             ------------------------------------------------------
             R14            3         16       4.59          13
             ------------------------------------------------------
             R14           14         16      11.05           2
             ------------------------------------------------------
             R21           15         22       2.23           7
             ------------------------------------------------------
             S15           19         23       2.16           4
             ------------------------------------------------------
             S16           40         46       2.87           6
             ------------------------------------------------------
             ------------------------------------------------------

    ((*)   Mwana is in the process of posting all assay results on
           www.mwana.com.)
    

    Kibolwe Surrounds

    Two diamond drill rigs have been secured to undertake a 5,000m diamond
drilling programme at the Kiamato copper-cobalt and the Mwombe
copper-cobalt-nickel occurrence located to the north-east and north-west of
Kibolwe.
    At Kiamato a 700 metre long and 15 metre wide zone of prospective strata
was mapped, trenched and sampled. Assay results received to date report cobalt
values of up to 0.2% cobalt over 2 metres which equates to almost 2% copper.
Traces of copper, up to 0.5% have been reported from leached strata. The
occurrence is open ended to the northeast and southwest.
    Mapping, trenching and sampling at Mwombe has identified mineralized
Mines Sub-group strata over 600 metres strike length. Assay results from
trench and pit sampling have yielded elevated Ni and Co values within the
Mines strata in the area. Grades of 2% Ni and 0.38% Co (over 1 metre) have
been reported. Elevated gold, platinum and palladium values were also
recorded; 1.1g/t Au, 1g/t Pt and 0.1g/t Pd.
    The diamond drilling programme is scheduled to commence at the end of
this quarter.

    Regional Airborne Geophysical Survey

    A total of 24,000 line kilometres of a planned 52,000 line kilometre high
resolution airborne magnetic and radiometric survey (line spacing 100m at a
40m elevation) was completed last quarter. The programme is scheduled to start
again in February. To date the survey has located additional blocks of
previously unidentified Roan strata host to Katangan stratiform copper
mineralization and identified several structural mineralization trap sites in
the vicinity of Kibolwe and the surrounding licence areas.
    A target generation and evaluation exercise based on the magnetic and
radiometric survey, soil geochemistry and historical data will be undertaken
during the coming quarter.
    Kalaa Mpinga, CEO of Mwana Africa, commented, "The potential of the
Katanga copper belt has been recognised for decades, and many prospects have
already been explored. Our drilling results now provide substantial support
for our belief that the Kibolwe licence area potentially contains a major new
resource with the potential for highly profitable production. Our major
airborne survey will furthermore enable us to prioritise existing targets as
well as assist in identifying new targets for future exploration."
    Charl du Plessis, Executive Vice President Exploration of Mwana, who
holds a PhD and is a Member of the AusIMM, is a "Qualified Person" as defined
in the AIM Rules and in National Instrument 43-101 - Standards of Disclosure
for Mineral Projects, and the information contained in this press release is
based upon information prepared under the supervision of Dr. du Plessis.
    Diagrams showing the SEMHKAT Licence and Project area, Kibolwe Project
Reverse Circulation drillhole locality plan and the Airborne Geophysical
Survey and Portion of the image of the magnetic survey will be available on
the Mwana website at www.mwanaafrica.com

    Notes to Editors

    Mwana is the 100% beneficial owner of the 9,689km(2) SEMKHAT exploration
licence in the copper belt area of the Katanga Province, Democratic Republic
of the Congo. Mwana's significant land holdings in this area were selected for
the high potential for discovery of base metals, and cover what is understood
to be extensions to the world class mining properties on the Congo part of the
Lufilian Arc, home to such major copper orebodies as Tenke, Fungurume, Kov,
Kamoto, and lead/zinc orebodies such as Kipushi.

    Competent Person and Sampling Protocols

    As required by the National Instrument 43-101, Mwana's designated
qualified personnel required for the supervision of exploration of the
projects is Charl du Plessis. Drill method utilized to generate the samples
was 4.5" diameter reverse circulation, using a face sampling hammer bit.
Collar positions were located using a differential GPS. Samples were collected
into plastic bags via a cyclone on 1m intervals and split through a riffle
splitter. The resultant 1m sample weighing 4kg was placed in a plastic bag.
The 4kg sample was split again and a 2kg sample was dried and crushed in a
ring mill. Duplicates, standard reference samples and blanks were inserted in
the sample sequence at a rate of 1 in 50. Samples were dispatched directly to
ALS Chemex at Edenvale, Johannesburg South Africa by air freight. All samples
were dried, crushed and pulverised to achieve 90% passing -75microns. The pulp
was collected from the pulveriser bowl by a ceramic sample scoop, and the
balance of the pulp stored for re-assay, if required. Samples were assayed by
four acid digest and method ME-ICP61 up to 10,000ppmCu; above this level
samples were re-assayed by Cu-OG62, a more accurate ore grade determination.
Intercepts were calculated as an arithmetic average. Intervals represent down
hole intercepts, although tables present the true thickness of the intercept.
Lower cut off grades accepted for the intercepts were 0.5%Cu with up to 2m
permissible as internal waste.

    Further Information

    For further information concerning the Kibolwe prospect, please refer to
the technical report dated July 11, 2007 and entitled "Technical Report - An
Independent Technical Report on Bindura Nickel Corporation, Freda Rebecca Gold
Mine and Semkhat (Anmercosa Exploration Congo SPRL), the Material Assets of
Mwana Africa PLC" which is available on SEDAR at www.sedar.com.

    Disclaimer

    This press release may contain forward-looking statements. Words such as
"anticipates", "expects", "intends", "plans", "forecasts", "projects",
"budgets", "believes", "seeks", "estimates", "could", "might", "should", and
similar expressions identify forward-looking statements. Although Mwana
believes that the plans, intentions and expectations reflected in these
forward-looking statements are reasonable, Mwana cannot be certain that these
plans, intentions or expectations will be achieved. Actual results,
performance or achievements could differ materially from those contemplated,
expressed or implied by the forward-looking statements contained in this press
release. These statements may include comments regarding: the establishment
and estimates of mineral reserves and mineral resources, production,
production commencement dates, production costs, grade, processing capacity,
potential mine life, feasibility studies, development costs, capital and
operating expenditures, and exploration. Factors that would cause actual
results or events to differ from current expectations include, among other
things, changes in commodity prices, changes in equity markets, failure to
establish estimated mineral resources, political risks, changes to regulations
affecting the Company's activities, delays in obtaining or failures to obtain
required regulatory approvals, failure of equipment, uncertainties relating to
the availability and costs of financing needed in the future, the
uncertainties involved in interpreting drilling results and other geological
data, delays in obtaining geological results, and the other risks involved in
the mineral exploration industry. Any forward-looking statement only speaks as
of the date on which it was made and, except as may be required by applicable
securities laws, Mwana disclaims any intent or obligation to update any
forward-looking statement, whether as a result of whether as a result of new
information, future events or otherwise. Mwana believes that the assumptions
inherent in the forward-looking statements are reasonable, however,
forward-looking statements are not guarantees of future performance and
accordingly undue reliance should not be put on such statements due to the
inherent uncertainty therein.





For further information:

For further information: Oliver Baring, Executive Chairman, Mwana Africa
plc, Tel: 020 7654 5588; Tom Randell or Anca Spiridon, Merlin, Tel: 020 7653
6620; Mike Jones or Ryan Gaffney, Canaccord Adams, Tel: 020 7050 6500

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SOUTHERNERA DIAMONDS INC.

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