Drilling Report
Messina Platinum Joint Venture Completes Phase 1 Drilling Program at
the Dwaalkop Section of the Greater Messina Platinum Project
21 Percent Increase in Platinum Group Metals Resource
Shares Issued and Outstanding: 74,166,193
TSX: SUF
AIM: SRE
TORONTO, Feb. 16 /CNW/ - SouthernEra Resources Limited today announced
that the Phase 1 in-fill drilling program at the Dwaalkop Section of the
Greater Messina Platinum Project has been completed to a depth of 500 meters
resulting in a 21 percent increase in the platinum group metals resource
compared to previous drilling undertaken by Anglo Platinum.
The Dwaalkop Section of the Greater Messina is a 50:50 joint venture
with
the Johannesburg-listed black empowerment mining company Mvelaphanda Resources
Limited. Title to the Dwaalkop Section was awarded to the Messina Platinum
Joint Venture in mid-2002 and a prospecting permit was awarded in July 2003.
The in-fill drilling program, which commenced last July, was designed in
conjunction with the independent consulting firm SRK Consulting.
The location of the Dwaalkop Section in relation to the Greater Messina
is illustrated on the attached map diagram. The Dwaalkop Section consists of
three properties: Rooibokbult 121 KS, Turfpan 122 KS and Dwaalkop 455 KS. Both
the UG2 and Merensky reefs, which are the common platinum group metals reefs
on the Bushveld Igneous Complex, are present across the 6-kilometer strike of
the Dwaalkop Section.
The results of the Phase 1 program are detailed below.
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Measured and Indicated Inferred
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Tonnes Grade Ounces Tonnes Grade Ounces
(000's) 5PGE + Au (000's) (000's) 5PGE + Au (000's)
(g/t) (g/t)
----------------------------------------------------------------------
Merensky 12,810 4.59 1.890 2,55 6.10 0,500
----------------------------------------------------------------------
UG2 14,950 5.37 2,580
----------------------------------------------------------------------
Total 27,760 5.01 4,470 2,55 6.10 0,500
----------------------------------------------------------------------
The Resource mass has been estimated from the dip area measured from the
base of the weathered zone or below a proposed crown pillar where the reef
abuts against the lower contact of the overlying sedimentary Karoo succession.
The specific gravity (SG) of the mineralisation is based on a dataset of all
core intervals assayed and determined in the logging shed prior to splitting.
The average SG values were estimated using the same optimisation model used
for the grades.
Geological losses on the Merensky reef have been taken at 15
percent,
based conservatively on the experiences to date at the Voorspoed (Phase 1)
Section where losses to potholes and faults are currently below 10 percent. No
mining losses for other pillars have been taken into account. The mass of this
Inferred Resource has been estimated from the same area as the Merensky and
discounted by the same amount for geological losses and, in addition, the
assumption that only 40 percent of this will contain mineralised footwall
pegmatoid.
The UG2 Indicated Resource has also been classified over a 1.4-meter wide
zone through an interval of 110 centimeters above the base of the UG2
chromitite and 30 centimeters below. The UG2 reef Resource, like the Merensky,
has a footwall pegmatoid and for at least 30 centimeters below the base of the
chromitite it appears to be reasonably continuous and has therefore been
incorporated into the resource estimate.
The UG2 Resource to 500 meters comprises 14.95 million tonnes at a grade
of 5.37 grams per tonne (5PGE+Au), which represents 2.58 million ounces
(5PGE+Au). The Pt: Pd ratio of the resource is 0.80. The previously stated
Inferred Resource to 500 meters was 14.65 million tonnes at a grade of 6.74
grams per tonne (5PGE+Au), representing 3.17 million ounces (5PGE+Au). The
current resource is 0.58 million ounces, or approximately 18 percent lower
than that previously stated.
The resource mass has been estimated in the same manner as Merensky reef
and using the same area. The average SG values were based on measurements of
all cores assayed and averaged using the same method used to average the
grades. Average values differ for every width interval depending upon the
amount of included pyroxenite waste.
Geological losses on the UG2 reef have been taken at 10 percent based
conservatively on the experience at the Voorspoed (Phase 1) Section where
losses to potholes and faults are currently less than 5 percent. Again no
mining losses for other pillars have been taken into account.
The detailed results are indicated in the table below:
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Merensky Reef Merensky Reef UG2 Reef
Indicated Pegmatoid Indicated
Resource Inferred Resource Resource
-------------------------------------------------------------------------
Metal Width of Reef Width of Reef Width of Reef
Interval 1.40m Interval 0.70m Interval 1.40m
-------------------------------------------------------------------------
Pt g/t 2.46 2.89 1.92
-------------------------------------------------------------------------
Pd g/t 1.35 2.32 2.40
-------------------------------------------------------------------------
Rh g/t 0.08 0.15 0.17
-------------------------------------------------------------------------
Au g/t 0.38 0.31 0.15
-------------------------------------------------------------------------
Ru g/t 0.27 0.36 0.59
-------------------------------------------------------------------------
Ir g/t 0.05 0.06 0.14
-------------------------------------------------------------------------
4E g/t 4.27 5.68 4.64
-------------------------------------------------------------------------
The in-fill drilling program to 500 meters consisted of 6 holes and 18
intersections through the Merensky reef and 6 holes and 16 intersections
through the UG2 reef. This is in addition to the previous drilling undertaken
by Anglo Platinum, which consisted of 33 drill intersections through the
Merensky reef and 24 drill intersections through the UG2 reef to a maximum
depth of 778 meters.
Both the Merensky and UG2 reefs outcrop at surface across the 6-kilometer
strike of the Dwaalkop Section. The degree of weathering (oxidation) varies
across the strike length. Depending on the outcome of geotechnical modeling
that will be conducted as part of the feasibility study currently underway, it
is anticipated that a crown pillar of approximately 30 meters will be
utilised.
The estimation of the Dwaalkop Section resource grade is based on that
used for the Great Dyke platinum deposits. The principle is the same as the
Histogram Method developed by Anglo Platinum in the early 1970's and still
used by them today. This methodology assigns a global grade and width and
because it assumes continuity of reef quality over the entire evaluation area,
features such as potholes or faults are discounted from the resource mass
without affecting the grade.
The accepted assay values and sample intervals for all metals were
captured and each sample interval has been corrected to its true thickness and
standardised to equal intervals. The intersections were stratigraphically
aligned relative to the base of the Marker Horizon for all metals and an
arithmetic mean calculated for each 10-centimeter increment. In order to
optimise the position and width of the highest value mining slice or best-cut
position, metal prices and plant recovery factors are applied to each of the
10-centimeter standard interval grades for all metals and these are summed to
give a total dollar per tonne value for each interval. The optimum mining
slice or best-cut position is determined by selecting the highest dollar value
for a series of mining widths and these positions. These maximum value
positions are then applied to the composite interval grades to determine the
optimum grade for each metal for a series of reef widths.
The Merensky reef Indicated Resource has been classified over a 1.4-meter
wide zone through an interval of 40 centimeters above the M1 chromitite marker
to 100 centimeters below. This is not entirely based on the value optimisation
model, which indicates a wider pay width. The intermittent presence of a
footwall pegmatoid with relatively high values is considered to give a
geologically unrealistic average grade. For this reason the grade over a ••••
70-centimeter wide zone of the footwall pegmatoid has been estimated
separately and because of uncertainties in the continuity of this
mineralisation, has been assigned to the Inferred category. There is, from the
drill hole evidence, reasonable continuity of the Merensky reef itself and
this has been classified as an Indicated Resource.
The Merensky Indicated Resource to 500 meters comprises 12.81 million
tonnes at a grade of 4.59 grams per tonne (5PGE+Au), which represents 1.89
million ounces (5PGE+Au). The Pt: Pd ratio of the Indicated Resource is 1.82.
The Inferred Resource comprises 2.55 million tonnes at a grade of 6.10 grams
per tonne (5PGE+Au), which represents 0.50 million ounces (5PGE+Au). The Pt:
Pd ratio of the Indicated Resource is 1.25. The previously stated Inferred
Resource to 500 meters was 8.45 million tonnes at a grade of 3.49 grams per
tonne (5PGE+Au), representing 0.95 million ounces (5PGE+Au). The current
Merensky resource is 1.44 million ounces or 151 percent higher than that
previously stated.
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6E g/t 4.59 6.1 5.37
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Ni % 0.23 0.19 0.16
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Cu % 0.14 0.11 0.12
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SG 3.18 3.16 3.50
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Mass Mt 15.07 7.5 16.61
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Geological Mt 2.26 1.12 1.66
Losses
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Resource Mass Mt 12.81 2.55 14.95
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6E Content Moz 1.89 0.50 2.58
------------------------------------------------------
SRK Consulting was appointed as independent consultants to review the
database and estimate the Resource in terms of the SAMREC Code and Canadian
National Instrument 43-101 Standards of Disclosure for Mineral Projects.
Dr Anthony Martin, the competent person who has completed the review has
been involved with the estimation of Resources and Reserves of magmatic
platinum group element deposits since 1992 and has 12 years of experience in
evaluation of deposits of this type.
Phase 2 of the in-fill drilling program on the Dwaalkop Section of the
Greater Messina Platinum Project is continuing on both the Merensky and UG2
reefs, to depths of 1,000 meters and 1,200 meters, respectively. Completion is
expected during the next quarter.
SouthernEra Resources is an independent producer of platinum group metals
(PGM) and diamonds. The company also has an extensive PGM, gold and diamond
exploration program. The common shares are listed on the Toronto Stock
Exchange and the London Stock Exchange's AIM market.
To view map of the development please visit:
http://files.newswire.ca/248/phase2.doc
For further information: SouthernEra Resources Limited: Dr. Sally Eyre,
Vice President, Corporate Affairs, Telephone: (416) 359-9282, Fax:
(416) 359-9141, E-mail: inbox@southernera.com, www.southernera.com
(SUF. SRE)