Brockman
Resources Limited (ASX: BRM)
Improved
Beneficiation Recoveries Indicate Potential 125Mt Uplift in Project Inventory
?
Average +59% recovery
achieved from beneficiation test work on detrital mineralisation from Marillana
Project ? compared with 47% previously reported.
?
Potential to generate
an additional 125Mt of beneficiated haematite grading +59% Fe from the current
1.06 billion tonne Beneficiation Feed Mineral Resource.
?
This would potentially
increase the total marketable product by over 20% to +680Mt of DSO and
beneficiated haematite.
?
At the current contract
FOB Hamersley Fines price of approximately A$90/tonne, this represents a
potential increase in revenue for the Marillana Project of greater than
A$11 billion.
Brockman
Resources Limited (ASX: BRM ? ?Brockman?) is pleased to announce
positive new results from ongoing beneficiation test work on the detrital
mineralisation at its 100%-owned Marillana Iron Ore Project in
Western Australia?s Pilbara region. The results demonstrate the potential
to increase the Project?s total estimated shipping inventory (Direct Shipping
Ore plus beneficiated mineralisation) by greater than 20% to over 680
million tonnes.
Completed
bench-scale tests on nine sonic core samples from the Marillana Project have
returned an average weight recovery of over 59%, compared to 47% from
the preliminary results reported on 18 January 2008. Significantly, these
increased recoveries have been achieved at similar recovered grades (i.e.
59-60% Fe) to previously reported results.
Based on this increased average
recoveries, the Beneficiation Feed Mineral Resource at Marillana of 1.06
billion tonnes grading 44.2% Fe (as announced on 5 March 2008) has the
potential to generate 625 million tonnes of beneficiated haematite at an
average grade of 59.2% Fe. This compares with the previously announced
estimate that the detrital mineralisation could generate approximately 500
million tonnes of beneficiated haematite grading +59% Fe (as announced on
5 March 2008).
When
combined with the current DSO Mineral Resource of 56.2 million tonnes @ 57.5%
Fe, the total potential shipping inventory at Marillana has increased by
over 20% to 680 million tonnes of haematite.
The results
indicate that the final product grade is largely independent of the head grade
or mineralisation type, producing a tight cluster of grades in the 59 ? 60% Fe
range, with only one outlier (S7) as shown in Table 1.
The overall
weight recovery appears to be dependent on head grade and mineralisation style,
with the pisolite samples returning approximately a 10% higher recovery, as
compared with the siliceous detritals, for a similar head grade.
The samples
tested were representative of the different types of detrital mineralisation
and have an average head grade comparable to the average grade of the
Beneficiation Feed Mineral Resource.
Commenting
on the results, Managing Director Wayne Richards said: ?These results are very
encouraging and provide further technical confidence in the quality and
potential of the very large detrital resource at Marillana to underpin a
greatly expanded long-term operation.
?The Scoping
Study announced on 16 April was based on a conceptual 10 Mtpa DSO Project? he added.
?The forthcoming Pre-Feasibility Study will be expanded to include the detrital
mineralisation as the basis for a significantly larger operation in the
15-25Mtpa range.
?Scale is
very important in the iron ore industry and our ongoing work is continuing to
prove up both the size and quality of the Marillana Project,? Mr Richards
continued.
Table 1
Summary of detrital mineralisation upgrade testwork.
Sample
No
|
Weight
recovery (%)
|
Head
Grade
(%
Fe)
|
Fe
(%)
|
SiO2
(%)
|
Al2O3 (%)
|
P
(%)
|
Fe
Recovery (%)
|
Siliceous Detritals
|
S1A
|
59.9
|
46.6
|
59.8
|
7.5
|
4.0
|
0.057
|
77.0
|
S5
|
56.8
|
45.9
|
59.5
|
8.1
|
4.0
|
0.058
|
73.6
|
S6
|
47.9
|
39.8
|
59.0
|
6.7
|
5.1
|
0.061
|
71.0
|
S9
|
53.5
|
44.3
|
59.7
|
7.8
|
3.7
|
0.064
|
72.1
|
S13
|
56.1
|
43.5
|
59.8
|
7.6
|
4.2
|
0.057
|
77.1
|
Average
|
54.8
|
44.0
|
59.6
|
7.5
|
4.2
|
0.059
|
74.2
|
|
Pisolites
|
S1B
|
65.1
|
50.9
|
60.0
|
4.4
|
4.7
|
0.057
|
76.8
|
S3
|
68.6
|
47.6
|
59.5
|
5.1
|
6.4
|
0.056
|
85.7
|
S7
|
71.3
|
48.0
|
56.9
|
5.2
|
8.3
|
0.041
|
84.5
|
S10
|
54.7
|
40.8
|
58.3
|
5.3
|
7.3
|
0.043
|
78.2
|
Average
|
64.9
|
46.8
|
58.7
|
5.0
|
6.7
|
0.049
|
81.3
|
|
|
|
|
|
|
|
|
Average
|
59.3
|
45.2
|
59.2
|
6.4
|
5.3
|
0.055
|
77.3
|
- ENDS -
Released
by:
On behalf of:
Nicholas Read / Kate Bell
Mr Wayne
Richards
Read Corporate
Managing Director
Telephone:
(+618) 9388
1474
Brockman Resources Limited
Telephone: (08) 9388-0866
Competent Person?s
Statement
The
information in this report that relates to Mineral Resources is based on
information compiled by Mr M Nimmo and Mr A Zhang.
Mr
M Nimmo, who is a Member of the Australasian Institute of Geoscientists and a
full-time employee of Snowden Mining Industry Consultants Pty Ltd produced the
Mineral Resource estimate based on the data and geological interpretations
provided by Yilgarn. Mr Nimmo has sufficient experience that is relevant
to the style of mineralisation, type of deposit under consideration and to the
activity that 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 Resource and Ore Reserves. Mr Nimmo consents to the
inclusion in this report of the matters based on his information in the form
and context that the information appears.
Mr A Zhang, who is a
Member of the Australasian Institute of Mining and Metallurgy and a full-time
employee of Yilgarn Mining Ltd provided the geological
interpretations and the drillhole data used for the Mineral Resource estimation. Mr Zhang has
sufficient experience that is relevant to the style of mineralisation, type of
deposit under consideration and to the activity that 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 Resource and
Ore Reserves. Mr Zhang consents to the inclusion in this
report of the matters based on his information in the form and context that the
information appears.
The information in
this report that relates to mineralisation and exploration results is based on
information compiled by Mr Colin Paterson, who is a Member of the Australian
Institute of Geoscientists. Mr Paterson is a full time employee of Brockman
Resources Ltd and 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 Paterson consents to the inclusion in the
report of the matters based on his information in the form and context in which
it appears.
READ
CORPORATE
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