Discovery of New Portside Bauxite Tasmania
Released
Released
Announcement PDF
ASX ANNOUNCEMENT
28 May 2015
AUSTRALIAN BAUXITE LIMITED
ASX: ABX
About Australian Bauxite Limited
ASX Code ABX
Australian Bauxite Limited (ABx) has started its first
bauxite mine in Tasmania and holds the core of the
Eastern Australian Bauxite Province. ABx’s 37 bauxite
tenements in Queensland, New South Wales &
Tasmania exceed 5,000 km2 and were rigorously
selected for (1) good quality bauxite; (2) near
infrastructure connected to export ports; & (3) free of
socio-environmental constraints. All tenements are
100% owned, unencumbered & free of third-party
royalties.
ABx’s discovery rate is increasing as knowledge,
technology & expertise grows.
The Company’s bauxite is high quality gibbsite
trihydrate (THA) bauxite & can be processed into
alumina at low temperature – the type in shortsupply globally.
ABx has declared large Mineral Resources at
Inverell & Guyra in northern NSW, Taralga in
southern NSW, Binjour in central QLD & in
Tasmania confirming that ABx has discovered
significant bauxite deposits including some of
outstandingly high quality.
In Tasmania, at Bald Hill, the Company’s first
bauxite mine commenced operations on schedule
on 9 December 2014 – the first new Australian
bauxite mine for more than 35 years, with first
shipments targeted for June or early 3rd Quarter,
2015.
ABx aspires to identify large bauxite resources in
the Eastern Australian Bauxite Province, which is
emerging as a globally significant bauxite province.
ABx has created significant bauxite developments in
3 states - Queensland, New South Wales and
Tasmania. Its bauxite deposits are favourably
located for direct shipping of bauxite to both local
and export customers.
ABx endorses best practices on agricultural land,
strives to leave land and environment better than
we find it.
We only operate where welcomed.
Directors / Officers
Paul Lennon
Chairman
Ian Levy
CEO & MD
Ken Boundy
Director
Leon Hawker
Rob Williams
Jacob Rebek
Henry Kinstlinger
Julian Rockett
Chief Operating Officer
General Manager
Chief Geologist
Secretary
Secretary
Bauxite Discovery at New Portside Production Centre
• Australian Bauxite Limited (ABx) has received highgrade assays from drill hole samples into the PR-18
bauxite deposit located north of Launceston and
close to the Bell Bay export port, northern Tasmania.
• Results are mainly high-grade, direct shipping bauxite
(DSO)1
• ABx considers this Portside area to be the most likely
third Bauxite Production Centre. ABx’s business plan
is to produce from 3 production centres so as to
maximise blending to produce consistent products
• ABx’s first two production centres are (1) the
Campbell Town production centre which includes
ABx’s operating mine at Bald Hill and (2) the DL-130
Production Centre west of Launceston – see Figure 1.
• Initial bauxite resources for the Campbell Town
production centre total 3.5 million tonnes.2
• ABx’s total bauxite resources for all regions total 119
million tonnes, of which 9.2 million tonnes are in
Tasmania 2
• The drilling program for the DL-130 area has
concluded for 2015 and revised resource estimation
will be conducted over coming months
• Once all assays from the new PR-18 discovery are
received and interpreted, additional drilling of several
other known targets within the Portside Production
Centre area will be undertaken as a matter of some
urgency and in Spring, important base line
environmental studies will be conducted to confirm
the initial assessment that there are no socioenvironmental barriers to development.
Australian Bauxite CEO Ian Levy said; “This discovery is a
result of ABx’s proprietary exploration technology and
efficient drilling by the ABx exploration team.
Bauxite potential in this area was downgraded by early
explorers because surface samples were low grade. ABx
encountered similar surface results but the ABx
exploration technology showed that good bauxite should
exist in this area.
So ABx drilled 68 reconnaissance drill holes and the 18th
hole discovered this excellent bauxite in an ideal location.”
For further information please contact:
Ian Levy, CEO and MD
Australian Bauxite Limited
ASX Symbol: ABX
Telephone: +61 (0) 2 9251 7177
Latest News: www.australianbauxite.com.au
Mobile:
+61 (0) 407 189 122
AUSTRALIAN BAUXITE LIMITED
ACN 139 494 885
Level 2 Hudson House 131 Macquarie Street Sydney NSW 2000
p: +61 2 9251 7177
f: +61 2 9251 7500
w: australianbauxite.com.au
e: corporate@australianbauxite.com.au
1 See Definitions
2 See Resources Summary
Page 2
ASX: ABX
Three Tasmanian production centres taking shape
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'+,*Rubble Flat
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Figure 1: location of three Tasmanian Bauxite Production Centres, Campbell Town, DL-130 and Portside (new)
•
ABx’s business plan is to produce bauxite from 3 production centres to achieve a consistent
product specification. Portside is the most likely 3rd production centre.
•
Bell Bay is the largest export port in Tasmania and is the bulk export for bauxite.
•
All highways, rail and port infrastructures have sufficient spare capacity for the planned bauxite exports.
Page 3
ASX: ABX
Bauxite Drill Results
Sixty-eight (68) reverse circulation drillholes, holes PR001 to PR068 were drilled in the Portside area
during March-April. A total of 715 metres were drilled, and 63 metres were in bauxite.
See Figure 2 for drillhole distribution and locations.
Based on inspection, the bauxite layer occurs beneath an overlying layer of unconsolidated sediments
ranging up to 12 metres thick in places which has concealed the majority of this bauxite deposit.
The bauxite formation is a flat-lying layer ranging in thickness from 2 to 4 metres.
After careful logging of the drill samples, 171 metres of samples have been sent to the ALS Laboratory
in Brisbane. Results are pending.
Initial results received: To confirm that good quality bauxite had in fact been discovered, nine (9)
representative samples of the bauxite were collected and dispatched to the ALS Laboratory for prompt
assaying. The results from these 9 samples are shown in Table 1 following:
Table 1
Results from first assaying of bauxite drill samples from PR-18 discovery in the Portside Production Centre
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Explanations: All samples are from samples logged as bauxite and are considered representative of the bauxite encountered in these
first 68 drillholes at the PR-18 bauxite discovery site. All assaying done at NATA-registered ALS Laboratories, Brisbane.
Chemical definitions: Leach conditions to measure available alumina "Al2O3 Avl" & reactive silica "Rx SiO2" is 1g leached in 10ml of
90gpl NaOH at 143°C for 30 minutes. LOI = loss on ignition at 1000°C. "Avl/Rx" ratio is (Al203 Avl)/(Rx SiO2) and "A/S" ratio is
Al203/SiO2. Values above 6 are good, above 10 are excellent. These samples are all raw, unsieved bauxite.
Notes
•
Results for the samples from holes PR013 and PR019 are moderate to poor grade bauxite, similar
to the surface sample results that confused early explorers in this area.
•
Results for deeper samples are generally high grade. Hence, this bauxite requires assessment by
drillholes rather than by surface exploration alone.
•
7 of the 9 samples could be sold as mined, with a minimum of processing (ie. DSO-grade) 3.
3 See definitions
Page 4
ASX: ABX
Figure 2: First 68 drillholes at the PR-18 bauxite discovery, Portside Production Centre
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Page 5
ASX: ABX
!
Resource Million ThickCategory Tonnes ness
mt
m
Region
%
%
ratio
%
%
%
Al2O3 Rx Avl/ Lab O'Bur Int.
!%('" SiO2 Rx Yield den Waste
%
% ratio %
m
m
3.5
3.0
3.3
3.1
3.2
Al2O3 SiO2 A/S Fe2O3 TiO2
LOI
Inferred
+
Indicated
Total
%
%'$ Inferred
1.8
1.7
3.5
5.7
9.2
3.0
3.2
3.1
3.8
3.5
42.6
42.5
42.5
44.1
43.5
3.5
3.2
3.3
4.3
3.9
12
14
13
10
11
25.4
26.4
25.9
22.8
24.0
24.6
24.5
24.5
25.0
24.8
36.7
36.2
36.5
37.6
37.2
3.0
2.8
2.9
3.2
3.1
12
14
13
12
12
50
55
52
55
54
2.1
1.8
2.0
1.5
1.7
0.1
0.1
0.1
0.1
0.1
&
9.0
15.5
24.5
3.9
5.3
4.8
43.7 4.5
44.2 3.1
44.1 3.6
10
15
12
22.4 3.6 24.2
23.4 3.7 24.9
23.1 3.7 24.6
38.0
39.5
39.0
3.8
2.6
3.0
10
15
13
59
62
61
8.2
9.4
8.9
0.3
0.3
0.3
Inferred
DSO Indicated
Total
'
Inferred
3.5
4.9
40.2 7.2
6
25.3 4.9 21.7
32.8
5.2
6
67
1.5
0.0
(
Inferred
Indicated
Total
9.9
10.2
20.1
3.1
3.7
5.6
40.4 5.7
41.3 5.3
40.8 5.5
7
8
7
24.6 4.1 22.2
25.9 4.0 22.9
25.3 4.0 22.6
35.2
36.1
35.7
1.9
1.9
1.9
18
19
19
54
55
55
0.1
0.7
0.5
0.2
0.4
0.3
*
PDM-DSO Inferred
7.6
2.5
37.0 6.0
6
38.4 3.5 13.3
22.1*
1.3
17
72
0.2
0.1
*
10.3
3.1
37.6 3.9
10
40.4 3.7 13.5
22.4
1.1
20
71
0.7
0.4
Total
17.8
37.9
5.8
5.7
37.3 4.8
39.2 5.2
8
8
39.6 3.6 13.5
32.0 3.8 18.3
22.3
35.4
*
1.2
1.6
18
23
72
63
0.5
0.5
0.3
0.3
Indicated
)
Inferred
Indicated
Total
17.5
20.5
38.0
4.7
4.8
4.8
39.8 4.8
40.6 4.7
40.2 4.7
8
9
9
27.7 4.3 22.2
26.9 4.1 22.5
27.3 4.2 22.4
31.0
32.0
31.6
4.2
4.0
4.1
7
8
8
61
60
61
2.3
2.4
2.4
*
Inferred
Indicated
Total
2.3
3.8
6.0
4.2
5.9
5.3
41.4 3.6
43.1 2.6
42.5 3.0
12
16
14
26.2 3.3 24.6
27.3 3.9 24.5
26.9 3.7 24.5
35.0
37.4
36.5
2.8
2.0
2.3
13
18
16
56
61
59
3.4
4.4
4.0
GRAND TOTAL ALL AREAS
119.1
* PDM is Al2O3 spinel. Al2O3 Avl at 225°C is >35%
Explanations: All resources 100% owned & unencumbered. Resource tonnage estimates are quoted as in-situ, pre mined tonnages. All assaying done at NATA-registered ALS
Laboratories, Brisbane. Chemical definitions: Leach conditions to measure available alumina "Al2O3 Avl" & reactive silica "Rx SiO2" is 1g leached in 10ml of 90gpl NaOH at
143°C for 30 minutes. LOI = loss on ignition at 1000°C. "Avl/Rx" ratio is (Al203 Avl)/(Rx SiO2) and "A/S" ratio is Al203/SiO2. Values above 6 are good, above 10 are excellent.
Tonnage is for bauxite in-situ. Lab Yield is for drill dust samples screened by ALS lab at 0.26mm. Production yields are not directly related and are typically between 60% and
75%. Tonnages requiring no upgrade will have 100% yield. Resource estimates exclude large tonnages of potential extensions, overburden & interburden detrital bauxite and
underlying transitional bauxite mineralisation. Production will clarify these materials.
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ASX: ABX
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Page 7
ASX: ABX
Australasian Code for Reporting Exploration Results, Mineral Resources and Ore Reserves “The JORC Code”: Table 1
Section 1 – Sampling Techniques and Data
Criteria
Sampling
techniques
JORC Code explanation
• Nature and quality of sampling
•
Commentary
Reverse circulation aircore drillhole samples at 1
metre depth intervals.
•
Measures to ensure sample representivity
and the appropriate calibration of any
measurement tools or systems used.
•
Representivity verified by twinned holes, drill sampling
tests at 0.5 metre intervals, core holes and bulk pits.
Correlations are moderate to good.
•
Material aspects of the determination of
mineralisation.
•
Bauxite identified geologically & field lab tests, ¼ samples
sent to ALS Laboratories Brisbane. Wet-screened at
0.26mm; recovered bauxite is assayed. Representative
unscreened bauxite-samples are assayed. Laboratory yields
bear an indirect relationship with actual production yields
which have averaged above 65% in bulk tests & mining.
Drill method
•
Drill type
•
Reverse circulation aircore drilling.
Drill sample
recovery
•
Recording and assessing chip sample
recoveries and results assessed.
•
Weigh samples, volume estimates, comparisons with
bulk pits.
•
Measures taken to maximise sample
recovery & ensure representative samples.
•
Lowest practical air pressure used, steady drill speed.
Drilling contractor is paid per day not per metre.
•
Relationship between sample recovery
and grade and possible sample bias.
•
No relationship has been observed between core
recovery & grade.
•
Have chip samples been geologically &
geotechnically logged to a level of detail to support
appropriate Mineral Resource estimation, mining
studies & metallurgical studies.
•
Every metre of drill chips is logged geologically,
photographed, assayed and all data recorded in
ABacus database. Geotechnical tests are done
during bulk test pits and trial mining.
•
Whether logging is qualitative or
quantitative in nature. Core (or costean,
channel, etc) photography.
•
Geological logging & field lab tests. Channel sampling, bulk
sampling & screened samples of bulk pits. All samples are
photographed & stored in database.
•
The total length and percentage of the
relevant intersections logged.
•
100% logged. Report lists total metres drilled,
sampled & assayed.
•
For non-core samples, whether riffled,
tube sampled, rotary split, etc & if
sampled wet or dry.
•
Quartered sampling done on undried aircore chip
samples, as drilled. Bauxite is dry.
•
Nature, quality and appropriateness of
the sample preparation technique.
•
Sample preparation technique suits bauxite type.
Confirmed by multi-tests.
•
Quality control procedures adopted for all
sub-sampling stages to maximise
representivity of samples.
•
Repeated sub-sampling and twinned holes produces
comparable laboratory results within natural variance
range.
•
Measures to ensure sampling representativeness of the in situ material collected.
•
Repeated sub-sampling & twinned holes produces
comparable results within natural variance range.
•
Whether sample sizes are appropriate to the
grain size of the material being sampled.
•
Sample sizes are appropriate to the grain size of the material
being sampled. Complies with sampling theory.
•
Nature, quality and appropriateness of
the assaying and laboratory procedures
used and whether the technique is
considered partial or total.
•
•
For geophysical tools, spectrometers, handheld XRF
instruments, etc, the parameters used in determining the
analysis including instrument make, model, reading
times, calibrations factors applied & their derivation, etc.
•
ALS uses industry-standard techniques for total
analysis for trihydrate bauxite types. Confirmed by
inter-lab tests & customers are satisfied with ALS
laboratory results after testing many samples.
Handheld XRF results in field laboratory used to
select samples for ALS laboratory analyses.
Calibration studies done and standards used.
Machine is serviced regularly.
Nature of quality control procedures adopted
(eg standards, blanks, duplicates, external
laboratory checks) & whether acceptable
levels of accuracy (ie lack of bias) & precision
have been established.
•
•
The verification of significant intersections
by either independent or alternative
company personnel.
•
Repeated sub-sampling and twinned holes produces
comparable laboratory results within natural variance
range.
•
The use of twinned holes.
•
Twinned holes done often.
Logging
Sub-sampling
techniques
and sample
preparation
Quality of
assay data
and laboratory
tests
•
Verification of
sampling and
assaying
•
•
Repeated sub-sampling & twinned holes produces comparable
laboratory results within natural variance range.
Laboratory standards statistically assessed during
resource estimation.
Page 8
ASX: ABX
Criteria
JORC Code explanation
Commentary
•
Documentation of primary data, data entry
procedures, data verification, data storage
(physical and electronic) protocols.
•
Well-established professional database procedures,
including links back to Lab data certificates, original
logging sheets and sample photos.
•
Discuss any adjustment to assay data.
•
When not material, some in-situ data can be
estimated mathematically from screened lab results
of the same samples.
•
Accuracy and quality of surveys used to locate
drill holes (collar and down-hole surveys),
trenches, mine workings and other locations
used in Mineral Resource estimation.
•
Drill holes sited using hand-held GPS accurate within 2
metres horizontally and within 3 metres vertically.
No down-hole surveys required for 15 metre deep
vertical holes.
•
Specification of the grid system used.
•
MGA94
•
Quality and adequacy of topographic
control.
•
•
Digital 5 metre topographic contours
Pre-mining, landform is professionally surveyed,
accurate to within 0.1 metres by Leica GS15 dual
frequency receiver.
•
Data spacing for reporting of Exploration Results.
•
Not specified.
•
Is data spacing and distribution sufficient to
establish degrees of geological and grade
continuity appropriate for the Mineral
Resource and Ore Reserve estimation?
•
•
Has sample compositing been applied?
Drill spacing is suitable for estimation of Inferred &
Indicated resources but not Measured which may
need mine confirmation.
Spacings confirmed geostatistically.
No sample compositing done.
•
Whether the orientation of sampling
achieves unbiased sampling of possible
structures and the extent to which this is
known, considering the deposit type.
•
•
Has orientation of drilling & key mineralised
structures introduced a sampling bias?
•
No bias has been detected from comparisons
between drillhole results and bulk pit results.
Sample
security
•
Measures taken to ensure sample
security.
•
Chain of custody methods, wire-tying & plastic
wrapping of pallets of samples.
Audits or
reviews
•
Results of any audits or reviews of
sampling techniques and data.
•
Audits by major firms and potential customers have
been satisfactory.
Location of
data points
Data spacing
and
distribution
Orientation of
data in
relation to
geological
structure
•
•
•
Shallow vertical holes are used to test surface layer of
bauxite as done by all bauxite companies.
Comparisons with bulk pits samples are satisfactory
Section 2 – Reporting of Exploration Results
Criteria
Mineral
tenement and
land tenure
status
JORC Code explanation
• Type, reference name/number, location
and ownership including agreements or
material issues with third parties such as
joint ventures, partnerships, overriding
royalties, native title interests, historical
sites, wilderness or national park and
environmental settings.
•
Commentary
Exploration Licences are listed in this report and all
held 100% by ABx4 Pty Limited, a wholly owned
subsidiary of Australian Bauxite Limited and free of
3rd party encumbrances, joint ventures, royalties,
native title, historical sites, wilderness or national
parks or socio-environmental constraints.
•
The security of the tenure held at the
time of reporting along with any known
impediments to obtaining a licence to
operate in the area.
•
All tenements are in good standing. A licence to operate
requires a landholder access agreement, a granted Mining
Lease and an acceptable Development Plan and
Environmental Management Plan.
Exploration done
by other parties
•
Acknowledgment and appraisal of
exploration by other parties.
•
The bauxite deposits are new discoveries by ABx
using its proprietary exploration technology.
Geology
•
Deposit type, geological setting and style
of mineralisation.
•
Bauxite formed on Tertiary volcanic tuffs.
Drill hole
Information
•
A summary of all information material to
the understanding of the exploration results
including a tabulation of the following
information for all Material drill holes:
o coordinates of hole collar
o dip and azimuth of the hole
o down hole length & interception depth
o hole length.
•
Material exploration results are reported in the
release.
Page 9
ASX: ABX
Criteria
Data
aggregation
methods
JORC Code explanation
Commentary
•
If the exclusion of this information is
justified, the Competent Person should
clearly explain why this is the case.
•
The Bauxite deposits have hundreds of holes,
thousands of samples & assays; too many data to list
in this manner.
•
In reporting Exploration Results, weighting
averaging techniques, maximum and/or
minimum grade truncations (eg cutting of
high grades) and cut-off grades are usually
Material & should be stated.
•
•
Uncut assays used due to normal distribution.
Cut-off grades are documented in the report,
including 30% available Al2O3 for screened samples.
•
Where aggregate intercepts incorporate short
lengths of high grade results and longer lengths of
low grade results, the procedure used for such
aggregation should be stated.
•
Not applicable: simple length weighting of standard 1
metre long samples grading above the cut-off grades
is used.
•
Metal equivalent value assumptions.
•
None used.
Relationship
between
mineralisation
widths and
intercept
lengths
•
These relationships are particularly important
in the reporting of Exploration Results.
•
Intercept length down hole equals the bauxite
mineralisation true width.
•
If the geometry of the mineralisation with
respect to the drill hole angle is known,
its nature should be reported.
•
Holes are vertical and the bauxite is horizontal
geometry.
•
If it is not known and only the down hole
lengths are reported, there should be a
clear statement to this effect.
•
Not applicable: bauxite mineralisation is horizontal;
perpendicular to the vertical holes.
Diagrams
•
Appropriate maps & sections (with scales) & tabulations
of intercepts should be included for any significant
discovery being reported These should include, but not
be limited to a plan view of drill hole collar locations &
appropriate sectional views.
•
Summarised maps are shown in the report.
Balanced
reporting
•
Where comprehensive reporting of all Exploration Results
is not practicable, representative reporting of both low and
high grades and/or widths should be practiced to avoid
misleading reporting of Exploration Results.
•
Summarised in the report, with examples shown as
appropriate.
Other
substantive
exploration
data
•
Other exploration data, if meaningful & material,
•
Material exploration data included in the report.
Further work
•
Nature & scale of planned further work.
•
Summarised in the report.
•
Diagrams clearly highlighting areas of possible
extensions, including the main geological
interpretations & future drilling areas.
•
Summarised in the report except where commercially
sensitive.
(but not limited to): geological observations;
geophysical survey results; geochemical survey
results; bulk samples – size & method of
treatment; metallurgical test results; bulk density,
groundwater, geotechnical & rock characteristics;
potential deleterious or contaminating substances.
Page 10
ASX: ABX
Figure 3: ABx Project tenements and major infrastructure in eastern Australia
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