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Navasota Outlines Bauxite Resources of 343
Million Tonnes Indicated and 63 Million Tonnes Inferred at Koba Project,
Guinea
Navasota Resources
Ltd. (TSX-V : NAV) is pleased to report initial bauxite resources for the
Koba Bauxite Project located in the Boke Bauxite Belt of northwestern Guinea,
West Africa. Total Indicated resources are estimated at 343,183,000 tonnes
averaging 42.78% Al2O3, 2.85% SiO2, and 27.83% Fe2O3 (Table 1), and an
additional 63,342,000 tonnes averaging 43.81% Al2O3, 2.74% SiO2, and 26.76%
Fe2O3 classified as Inferred resources (Table 2). Scott Wilson Roscoe
Postle Associates Inc. (SWRPA), part of the Scott Wilson Mining Group,
completed the resource study, which conforms to Canadian National Instrument
43-101, Standards of Disclosure for Mineral Projects.
Table 1: Indicated Bauxite Resources, Koba Bauxite Project
Plateau
|
Tonnage
|
Al2O3 (%)
|
Fe2O3 (%)
|
SiO2 (%)
|
TiO2 (%)
|
CaO (%)
|
MgO (%)
|
Eastern Plateaus
|
|
|
|
|
|
|
|
Farenya
|
32,020,000
|
41.28
|
29.49
|
2.93
|
3.01
|
0.01
|
0.04
|
Madina Diang+Tito
|
100,836,000
|
41.65
|
29.53
|
2.69
|
2.57
|
0.01
|
0.04
|
Nomo
|
120,553,000
|
43.58
|
26.77
|
2.74
|
2.29
|
0.01
|
0.03
|
Ouda
|
43,411,000
|
43.73
|
26.86
|
2.84
|
2.20
|
0.01
|
0.02
|
Western Plateaus
|
|
|
|
|
|
|
|
Foye
|
14,802,000
|
42.58
|
26.94
|
3.72
|
2.08
|
0.01
|
0.03
|
Kouraidendeli
|
31,561,000
|
43.62
|
26.52
|
3.33
|
2.07
|
0.02
|
0.03
|
TOTAL
|
343,183,000
|
42.78
|
27.83
|
2.85
|
2.40
|
0.01
|
0.03
|
Table 2: Inferred Bauxite Resources, Koba Bauxite Project
Plateau
|
Tonnage
|
Al2O3 (%)
|
Fe2O3 (%)
|
SiO2 (%)
|
TiO2 (%)
|
CaO (%)
|
MgO (%)
|
Western Plateaus
|
|
|
|
|
|
|
|
Fakkerefonye
|
31,970,000
|
44.87
|
25.08
|
2.82
|
2.50
|
0.01
|
0.03
|
Killikocco
|
7,944,000
|
41.41
|
30.19
|
2.54
|
2.73
|
0.02
|
0.02
|
Ore Pousse 1
|
1,137,000
|
41.33
|
30.27
|
2.79
|
1.91
|
0.02
|
0.03
|
Ore Pousse 2
|
7,439,000
|
44.18
|
26.33
|
2.87
|
2.32
|
0.02
|
0.04
|
Touguiwel Competa
|
14,852,000
|
42.84
|
28.49
|
2.63
|
2.29
|
0.01
|
0.05
|
TOTAL
|
63,342,000
|
43.81
|
26.76
|
2.74
|
2.44
|
0.01
|
0.03
|
Mineral resources were estimated using cut-off grades of >35% Al2O3,
<35% Fe2O3, <6% SiO2, <5% TiO2, <0.2% CaO, <0.2% MgO, and
Al2O3/SiO2 >10. A minimum mining thickness of 2 metres and a maximum
stripping ratio of 3:1, waste: ore were also used in the estimation process.
Resources are classified as Indicated based on hole spacings of 150 metres.
Inferred resources are based on drill hole spacings up to 300 metres. CIM
definitions were followed for the Mineral Resource estimate.
Resource estimation utilized much of the drill hole database of 36,759 metres
in 2,147 drill holes in two phases of aircore drilling over 26 bauxitic
plateaus. Only results available prior to October 31, 2008 were included. As
a result, only 58% of the holes from Kouraidendeli Plateau, 82% from Nomo,
and 0% from Sapi are included in the estimate. No resources are included from
the Central Plateaus as the density of drilling is currently insufficient to
establish continuity of the bauxite intervals. In addition, no estimates have
been made for the plateaus located in the north part of the Gaoual Permit as
assay results are pending. Once outstanding results become available, mineral
resource estimates will be updated and preliminary economic assessments
initiated.
Phase 1 drilling was designed to confirm the presence of bauxite
mineralization on 26 target "plateaus" identified through Aster
satellite imagery analyses. This initial phase of drilling totalled 10,666
metres and consisted of 558 shallow holes at 300 and 600-metre hole spacings.
Phase 2 drilling, totalling 26,093 metres in 1,589 holes, reduced the drill
spacing to 150-metres on 12 plateaus previously covered by Phase 1 drilling.
Phase 2 drilling allowed SWRPA to determine the continuity of bauxite
mineralization, grade and thickness variability; necessary parameters for
resource modelling.
Table 3 Summary of Drilling, Koba Bauxite Project
Plateau
|
PHASE 1
|
PHASE 2
|
AC Holes
|
Drill Metres
|
AC Holes
|
Drill Metres
|
Eastern Plateaus
|
|
|
|
|
Madina Diang
|
24
|
570
|
269
|
4,702
|
Tito
|
18
|
438
|
|
|
Nomo
|
40
|
917
|
418
|
7,105
|
Ouda
|
13
|
298
|
101
|
1,962
|
Farenya
|
26
|
499
|
117
|
1,839
|
Maniega
|
-
|
-
|
-
|
-
|
Akounedjande
|
14
|
174
|
|
|
Central Plateaus
|
|
|
|
|
Kaoulak
|
18
|
329
|
|
|
Horefilo
|
13
|
247
|
|
|
Fillo
|
8
|
165
|
|
|
Kendaya
|
12
|
239
|
|
|
Bounna
|
17
|
279
|
|
|
Kounsitokhe
|
15
|
254
|
43
|
601
|
Dounoama
|
13
|
212
|
|
|
Lakhorde
|
15
|
244
|
59
|
822
|
Tenkele
|
25
|
441
|
68
|
976
|
Northeastern Plateaus
|
|
|
|
|
Kouraidendeli
|
111
|
2,077
|
320
|
5,094
|
Touguiwel Competa
|
11
|
259
|
|
|
Killikocco
|
8
|
165
|
|
|
Fakkerefonye
|
25
|
559
|
|
|
Northwestern Plateaus
|
|
|
|
|
Ore Pousse 1
|
7
|
103
|
|
|
Ore Pousse 2
|
8
|
155
|
|
|
Sapi North
|
10
|
163
|
37
|
557
|
Sapi South
|
14
|
246
|
58
|
933
|
Foye
|
30
|
505
|
99
|
1,502
|
Gaoual North Plateaus
|
|
|
|
|
Kounsidji
|
57
|
1,026
|
|
|
Bhoundoutchale
|
6
|
102
|
|
|
TOTALS
|
558
|
10,666
|
1,589
|
26,093
|
GRAND TOTAL
|
|
2,147
|
36,759
|
Technical Studies Initiated
Navasota has retained SWRPA to perform a high-level preliminary environmental
and social review of the Koba Bauxite Project in Guinea. This process
included a review of existing data, site visit, and report identifying both
social and environmental issues to be addressed prior to project development.
A SWRPA team recently completed the data review and site visit.
An average bulk density of 2.346 was derived from 10 representative samples
collected from freshly dug pits on Nomo and Madina Diang plateaus. This bulk
density value is higher than typically encountered in Guinea due to the
relatively high iron content of the bauxite. Coffey Mining is currently
on-site overseeing the collection of additional samples for bulk density and
metallurgical studies. The program consists of excavating a series of pits on
several plateaus to collect a broad suite of samples representing the
different varieties of bauxite comprising the Koba resource.
General Information
Navasota has the right to earn a 100% interest in the "AMIG"
permits, which cover 1,064 square kilometres in the T�lim�l� and Gaoual
prefectures of Guinea. These permit areas are located in the Boke Bauxite
Belt, which hosts the world's largest and highest-quality bauxite deposits,
and are directly surrounded by several of the world's major bauxite miners.
Koba bauxite deposits are predominantly "blanket-type" and fall
within the Gaoual deposit group of the Boke-Gaoual Bauxite District. The
bauxite is primarily residual in nature, gibbsitic in composition, and
containing 40-50% Al2O3 and 1-3% SiO2. Gibbsite is the most desirable
aluminum hydroxide species as it can be processed at substantially lower
temperatures than either boehmite or diaspore. The bauxite horizon is
typically 5 -- 8 metres thick but locally may reach 15 -- 20 metres
thickness.
Don Hains, P.Geo., Associate Consultant with SWRPA, and Christopher J. Wild,
P.Eng., Vice-President Exploration with Navasota Resources Ltd., both
Qualified Persons as defined by Canadian National Instrument 43-101, have
reviewed and approved the technical disclosure contained in this news
release.
For more information on Navasota and the Koba Bauxite Project, please visit www.navasota.com or
contact Kyle Stevenson of Stevenson & Associates IR at 604-687-1779.
On behalf of the Board of Directors
Navasota Resources Ltd.
Signed
James T. Gillis, President & CEO
Neither the TSX Venture
Exchange nor its Regulation Services Provider (as that term is defined in the
policies of the TSX Venture Exchange) accepts responsibility for the adequacy
or accuracy of this news release.
You can also view this News Release
on our website at:
http://www.navasota.com/s/NewsReleases.asp?ReportID=335650
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