DLY.AX and DLLF.PK
DEEP YELLOW
LIMITED
21 November 2007
TUBAS JORC CODE INFERRED RESOURCE
Deep Yellow Limited (DYL) advises that Geomine Consulting Namibia CC (Geomine) have
provided its wholly owned Namibian subsidiary Reptile Uranium Namibia (RUN) with an Inferred
Mineral Resource estimate (reported to JORC Code standard) for the Tubas project based on the
historical data reported by Anglo American Prospecting Services (Anglo) from their work on the
deposit during the 1970’s and early 1980’s which ended in a feasibility study being undertaken.
The Inferred Mineral Resource totals 77.3 million tonne at 0.023% (228 ppm) U3O8 at a cut-off
grade of 100 ppm U3O8 for 17,600 tonne or 38.8 million pounds of contained U3O8.
This resource estimate refers to mineralisation occurring within a 14 by 8 kilometre (96 km2)
channel system referred to as A-Block that contains widespread shallow secondary uranium
mineralisation in the form of carnotite. Within the A-Block area 384 holes were drilled on a 1,000
by 250 m grid. Data was also available for two more detailed grids within A-Block, namely BBlock
and D-Block. B-Block covers 3 km2 within which 90 holes were drilled on a 250 by 125 m
grid. D-Block covers 4 km2 within which 199 holes were drilled on a 200 by 200 m (and later
partially in-filled to 100 by 100 m) grid.
Geomine reported a range of resource estimates using cut-off grades between 50 and 200 ppm
U3O8. Estimates were generated using a simplified area-of-influence polygon method using
uranium grades based on assay results. The data set used for this resource determination was
obtained from integrating the borehole data from the A-Block, B-Block and D-Block as described
above. A bulk density of 1.8 tonne per m3, as determined by Anglo was used in this estimate.
Geomine caution that due to the elements of uncertainty introduced by the wide-spaced drill
pattern for A-Block that the level of confidence in the resource estimate is low, especially in ABlock
where the exceedingly large polygons can easily lead to an overestimation of the resource.
Accordingly, Geomine have classified the Tubas deposit as delineated by Anglo as an Inferred
Mineral Resource under the JORC Code which covers situations whereby although mineralisation
has been identified and limited measurements and sampling (drill holes) are available there is
insufficient data to allow grade/tonnage continuity to confidently interpolated between drill holes.
The resource estimate for the combined Blocks B and D have a relatively higher level of
confidence as the polygons are smaller and more detailed data were available. It can also be
assumed that the bulk of the Tubas Project resources are found in the Blocks B and D area.
Tubas JORC Code Inferred Resource
07-76 Page No. 2
RUN Exploration Data
RUN has been conducting RC drilling in the southern and central portion of Anglo’s A-Block and to
date has completed 722 holes (18,304 m) on various grid spacings as previously reported. None
of this data has been used by Geomine in their resource estimate. It is envisaged that once the drill
hole collars have been surveyed and assays are received that the RUN drill data will be
incorporated into the Inferred Resource estimate -so raising confidence levels on a regular basis.
Dr Leon Pretorius
Managing Director
Further Information:
Mr Martin Kavanagh
Executive Director
(08) 9286 6999
The information in this report that relates to Mineral Resources is based on information compiled by
Mr. Willem H. Kotzé Pr.Sci.Nat MSAIMM. Mr. Kotzé is a Member and Professional Geoscientist Consultant of
Geomine Consulting Namibia CC. Mr. Kotzé has sufficient experience which is relevant to the style of
mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a
Competent Person as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves’. Mr. Kotzé consents to the inclusion in this release of the matters based on
his information in the form and context in which it appears.
The information in this report that relates to Exploration Results, Mineral Resources or Ore Reserves is based on
information compiled by Dr Leon Pretorius a Fellow of The Australasian Institute of Mining and Metallurgy.
Dr Pretorius has sufficient experience which is relevant to the style of mineralisation and type of deposit under
consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004
Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’.
Dr Pretorius consents to the inclusion in the report of the matters based on his information in the form and context
in which it appears.
