Revised release of Scoping Study results
Released
Released
Announcement PDF
ASX Announcement
9 November 2023
Revised release of Scoping Study results
Critical Minerals Group Limited (ASX:CMG) or the Company) is pleased to attach a revised
announcement to that released on 1 November 2023 concerning the results of the Scoping
Study for its Lindfield Vanadium Project. The attached updated release contains revised and
additional information, including a Production Schedule and other relevant information. In
regard to its Scoping Study, the Company encourages investors to read and consider this
announcement, as well as its historical announcements referred to therein, in full before
making any investment decisions regarding the Company’s securities.
This announcement was approved for release by the board.
For more information:
Scott Winter
Managing Director
info@criticalmineralsgroup.com.au
+61 (0) 7 5555 5077
Jane Morgan
Media & Investor Relations
+61 (0) 405 555 618
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info@criticalmineralsgroup.com.au | Critical
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ASX Announcement
9 November 2023
CMG successfully completes Scoping Study for
Flagship Lindfield Vanadium Project
Key Highlights
•
CMG completes a Scoping Study to develop a vanadium mine at its flagship
Lindfield Vanadium Project in Julia Creek, QLD.
•
The Scoping Study supports the conclusion that the Lindfield Vanadium Project
has both the practical and financial attributes to develop a successful 4 million
tonne per annum ROM vanadium mine producing vanadium pentoxide.
•
Long Mine life, viable IRR (post tax) and a compelling positive NPV.
•
The additional High Purity Alumina has also been confirmed as a potential product
which could provide future upside for the project.
•
Site and regional infrastructure and utilities are available to support the
development of the vanadium mine.
Critical Minerals Group Limited (ASX:CMG, “Critical Minerals Group”, “CMG” or “the
Company”) is pleased to announce that it has completed the Scoping Study for its flagship
Lindfield Vanadium Project (“the Project”). The Scoping Study (“the Study”) findings are
encouraging and support the conclusion that both the practical and financial attributes exist to
develop a successful vanadium mine with a molybdenum trioxide by-product. High Purity Alumina
(HPA) has not been included in the financial analysis however, aluminium (III) oxide is present in
substantial quantities that produce a 4N grade HPA, which could potentially increase the project
returns subject to further analysis of the market. The Scoping Study work highlighted areas of
opportunity in the resource with these results planned to be released once the analysis has been
completed.
Scoping Study Cautionary Statement
The Scoping Study referred to in this announcement has been undertaken to consider
development of the Lindfield Vanadium Project. It is a preliminary technical and economic study
of the potential viability of the Lindfield Vanadium Project. It is based on low level technical and
economic assessments that are not sufficient to support the estimation of ore reserves. Further
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evaluation work and appropriate studies are required before CMG will be in a position to estimate
any ore reserves or to provide any assurance of an economic development case.
The Scoping Study is based on the material assumptions outlined below. These include
assumptions about the availability of funding. While CMG considers all the material assumptions
to be based on reasonable grounds, there is no certainty that they will prove to be correct or that
the range of outcomes indicated by the Scoping Study will be achieved.
To achieve the range of outcomes indicated in the Scoping Study, additional funding will be
required. CMG has a supportive shareholder base and has successfully raised capital to progress
the development in the past. CMG could also potentially qualify for Northern Australia
Infrastructure Funding (NAIF) and, with appropriate project credentials, source debt funding
through applicable sources. Investors should note that there is no certainty that CMG will be able
to raise that amount of funding when needed. It is also possible that such funding may only be
available on terms that may be dilutive to or otherwise affect the value of CMG’s existing shares.
It is also possible that CMG could pursue other ‘value realisation’ strategies such as a sale, partial
sale or joint venture of the Project. If it does, this could materially reduce CMG proportionate
ownership of the project.
Given the uncertainties involved, investors should not make any investment decisions based
solely on the results of the Scoping Study.
What was evaluated
Wave International Pty Ltd (Wave) were engaged by CMG to carry out a Scoping Study of the
Lindfield Vanadium Project., prepared within the cost accuracies and ranges of a Class 5 cost
estimate type as defined by the Association for the Advancement of Cost Engineering (AACE)
(+/-35-50% accuracy). Key contributing factors to this accuracy include beneficiation recoveries,
capital cost, and operating costs. The scope of work included undertaking concept level
engineering of a greenfields mine, together with associated site infrastructure and process
operations, aimed at producing a 98.5% pure vanadium pentoxide (V₂O₅) product, with the further
potential to produce 99.99% (4N) pure HPA product and molybdenum trioxide (MoO3).
The Study produced a project plan and financial model based on typical Australian-based industry
inputs, projecting financial returns over the life of the mine, assuming a base case 4 million tonnes
per annum (Mtpa) Run of Mine (ROM) mineralised material feed.
The Study included the site-based infrastructure (buildings, roads, water, power, dams, and other
associated site infrastructure), and the vanadium processing plant. The plant design will allow for
the beneficiation of ROM mineralised material, to produce vanadium pentoxide, and molybdenum
trioxide as an additional product. Stantec and Lava Blue, were also engaged to provide a separate
evaluation on a potential standalone HPA plant of a nominal production capacity of 4,000 tonnes
per year, utilising raffinate bleed from the Vanadium SX plant as feed for the HPA plant.
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The Study also included a pit optimisation and mining report prepared by The Measured Group,
and a high-level environmental project description and report prepared by Epic Environmental,
outlining environmental and permitting requirements for the Project.
A metallurgical test work program was undertaken by CMG to develop a detailed understanding
of the nature of the mineralised material, and to establish the design parameters for the process
plant. This also assisted in the scoping level design of other site infrastructure, and subsequent
capital and operating cost estimates for the Project.
Key findings of the Scoping Study
Mining / Geology
The Scoping Study evaluated a range of ROM production levels from 2 Mtpa to 6 Mtpa, with 4
Mtpa selected as the optimal production level to assess. The mine planning and scheduling
focussed on the mid horizon based on Resources as reported in the Mineral Resource Estimate1,
noting that the mid seam is approximately 80% Indicated and 20% Inferred JORC resource. CMG
is not aware of any new information subsequent to the 16 May 2023 announcement. Total
production of vanadium pentoxide from this design option delivered an average of over 10,500
tonnes per annum, with 550 tonnes per annum of molybdenum trioxide as a by-product. Early
processing test work results highlighted that the TLBA horizon (upper horizon), currently excluded
from Mineral Resource Estimate (due to its lower in-situ grade), achieved favourable concentrate
grades, and as such, has been identified as an area for further analysis.
The Lindfield Deposit has a long life under current assumptions and is shallow and flat lying. Only
resources above the base of weathering and above the V₂O₅ cutoff grade are mined and
processed. Lindfield homestead is located to the north and mining has avoided proximity to it.
The western project limit is the project lease boundary. There is a major north-south trending
fault which terminates the deposit to the east. Road and rail infrastructure is located some 15 km
to the south. Mining progresses from north to south and accordingly most of the mine and process
infrastructure is located to the north of the deposit as shown in Figure 1.
Waste is hauled to an external waste dump for the first 2 years and thereafter as sufficient in-pit
dump space becomes available, waste is short hauled in-pit. Beneficiation waste from the plant
is backhauled in empty trucks and placed in these mine waste dumps.
1
Please refer to Company’s ASX announcement dated 16 May 2023.
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Figure 1 – Lindfield Deposit Project Layout
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A typical cross section through the initial mining area is shown in Figure 2.
Figure 2 - Cross Section B: Looking north showing resource and pit limits in the
proposed initial mining area to the north of the deposit
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Figure 3 - Drill Hole location plan Lindfield Project May 2023
Image 1 - Lindfield drill core
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Mining Method
The proposed mining method is conventional truck and shovel open pit bench mining. All mining
has been assumed to be free dig with track dozer ripping to support excavators as necessary.
The mining fleet comprises five Komatsu PC850 80t excavators with fourteen Caterpillar 740 40t
ADT trucks. A 4 cu.m Caterpillar 966 wheel loader provides backup for the excavator and
undertakes ROM stockpile rehandle to the plant plus other operational tasks
The support fleet includes mid-sized grader, track dozers and water truck. Ancillary plant includes
small excavators and trucks, lighting plants, pumps, forklift, compactor, crane, service trucks, bus
and light vehicles.
It has been assumed that the operation will work 6 days per week with two 10-hour shifts per day
using two labour panels and a small relief crew to cover absenteeism and weekend shifts as
required.
Production Schedule
The mine production schedule was based on a cut-off grade of 0.4% V₂O₅ for TLBB which was
developed from metallurgical test results, recoveries, predictions of product price, process and
mining costs. The mine schedule was developed using Spry software. Graphs of this production
schedule are shown in Error! Reference source not found.4. The production schedule is also
shown in Error! Reference source not found.. Over 15 year of mine life 175.5 Mt of waste and
53.9 Mt Resource is mined at a strip ratio of 3.35 t/t. Allowance is made for a 5% resource mining
loss and 5% waste dilution.
The resource production consists of TLBB 53.9Mt at 0.506% V₂O₅. Resource from the North pit
is approximately 24Mt or 7 years and from the south pit is 30Mt or 8 years. The first 7 years of
mining is predominantly Indicated Resources (95% Indicated). Thereafter over the remaining 8
years of the production schedule the split between Indicated and Inferred resources averages
approximately 70% to 30% respectively.
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Figure 4 - Mine Production Schedule Resource tonnes and grade
Mining Cost Estimate
A high-level scoping accuracy mining capital and operating cost estimate was undertaken for the
purpose of providing mining cost input into the project economic model. The capital and operating
cost estimate was estimated from first principles making allowances for productivity, mining fleet,
annual operating hours, plant life, capital estimate and hourly operating cost excluding operator
and maintenance labour, overheads and supervision.
The LOM average operating cost was $A2.53/t of total material moved. The initial capital cost is
$24 million for mining plant and $3.1 million for mining infrastructure, and replacement capital is
estimated at $34.6 million, resulting a LOM capital estimate of $61.7 million and allows for 15%
contingency and 10% salvage value on replaced equipment.
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Table 1 - Mine Resource Production Schedule TLBB
Results
Waste Tonnes
ROM Resource Tonnes
(TLBB)
ROM V2O5 Tonnes (TLBB)
ROM V2O5 Grade (TLBB)
ROM Strip Ratio
Resources by JORC Category
Indicated Resources
Indicated ROM V2O5 Grade
Inferred Resources
Inferred ROM V2O5 Grade
Proportion Indicated
Proportion Inferred
TLBB Resource
TLBB ROM Resource Tonnes
TLBB ROM V2O5 Tonnes
TLBB ROM V2O5 Grade
Total
Total
2026
Year 1
2027
Year 2
2028
Year 3
2029
Year 4
2030
Year 5
2031
Year 6
2032
Year 7
2033
Year 8
2034
Year 9
2035
Year 10
t
ROM t
175,460,824
53,893,229
7,434,390
2,500,000
8,921,268
3,000,000
11,895,024
4,000,000
11,895,024
4,000,000
11,384,456
4,000,000
11,384,456
4,000,000
11,602,510
4,000,000
11,602,510
4,000,000
12,731,670
4,000,000
12,731,670
4,000,000
t
%
t:t
272,923
0.506%
3.3
11,688
0.468%
3.0
14,836
0.495%
3.0
22,225
0.556%
3.0
20,003
0.500%
3.0
19,781
0.495%
2.8
19,781
0.495%
2.8
22,225
0.556%
2.9
22,225
0.556%
2.9
20,003
0.500%
3.2
20,003
0.500%
3.2
t
%
t
%
%
%
44,100,260
0.506%
9,792,969
0.506%
82%
18%
2,375,000
0.468%
125,000
0.468%
95%
5%
2,850,000
0.495%
150,000
0.495%
95%
5%
3,800,000
0.556%
200,000
0.556%
95%
5%
3,800,000
0.500%
200,000
0.500%
95%
5%
3,800,000
0.495%
200,000
0.495%
95%
5%
3,800,000
0.495%
200,000
0.495%
95%
5%
3,800,000
0.556%
200,000
0.556%
95%
5%
2,800,000
0.556%
1,200,000
0.556%
70%
30%
2,800,000
0.500%
1,200,000
0.500%
70%
30%
2,800,000
0.500%
1,200,000
0.500%
70%
30%
ROM t
t
%
53,893,229
272,923
0.506%
2,500,000
11,688
0.468%
3,000,000
14,836
0.495%
4,000,000
22,225
0.556%
4,000,000
20,003
0.500%
4,000,000
19,781
0.495%
4,000,000
19,781
0.495%
4,000,000
22,225
0.556%
4,000,000
22,225
0.556%
4,000,000
20,003
0.500%
4,000,000
20,003
0.500%
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Results
Waste Tonnes
ROM Resource Tonnes (TLBB)
ROM V2O5 Tonnes (TLBB)
ROM V2O5 Grade (TLBB)
ROM Strip Ratio
Resources by JORC Category
Indicated Resources
Indicated ROM V2O5 Grade
Inferred Resources
Inferred ROM V2O5 Grade
Proportion Indicated
Proportion Inferred
TLBB Resource
TLBB ROM Resource Tonnes
TLBB ROM V2O5 Tonnes
TLBB ROM V2O5 Grade
2036
Year 11
2037
Year 12
2038
Year 13
2039
Year 14
2040
Year 15
t
ROM t
t
%
t:t
13,131,670
4,000,000
20,003
0.500%
3.3
14,291,302
4,000,000
20,336
0.508%
3.6
14,291,302
4,000,000
20,336
0.508%
3.6
20,179,755
4,000,000
17,732
0.443%
5.0
1,983,816
393,229
1,743
0.443%
5.0
t
%
t
%
%
%
2,800,000
0.500%
1,200,000
0.500%
70%
30%
2,800,000
0.508%
1,200,000
0.508%
70%
30%
2,800,000
0.508%
1,200,000
0.508%
70%
30%
2,800,000
0.443%
1,200,000
0.443%
70%
30%
275,260
0.443%
117,969
0.443%
70%
30%
ROM t
t
%
4,000,000
20,003
0.500%
4,000,000
20,336
0.508%
4,000,000
20,336
0.508%
4,000,000
17,732
0.443%
393,229
1,743
0.443%
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Metallurgical testing
Metallurgical testing of the vanadium within the project limits has been undertaken on each of the
process flowsheet steps, which enabled the development of an economically viable beneficiation
process, warranting further pilot plant testing. The process to produce V2O5 and MoO3 consists
of beneficiation and upgrade comprising scrubbing, screening, cyclones, flotation, and
dewatering. This is followed by roasting, sulphuric acid leach, metal extraction and product
precipitation and packaging for transport.
Metallurgical testing and evaluation of each of the horizons within the deposit, has subsequently
identified the economic viability of the upper horizon within the mining sequence23. Further
evaluation is planned by CMG to confirm the inclusion of the upper horizon in the next Mineral
Resource Estimate update. An option being evaluated as part of further analysis is to stockpile
the upper and mid horizon material separately on the ROM and process them separately.
The metallurgical work also identified potential for molybdenum build-up to economically viable
levels in the waste stream, therefore molybdenum was included in the process flow sheet.
A series of processing test programs were carried out to evaluate the production of HPA. The
test work identified that using the Lava Blue technology, the Lindfield deposit could produce a 4N
quality HPA product.
Infrastructure
An evaluation of the site and regional infrastructure and utilities concluded that the power and
water requirements for the Project are readily achievable. Water supply is planned in the Study
through existing water bores and regional water harvesting, whilst power is planned to be sourced
from a combination of offsite grid supply, on-site generation, and gas from off-site supply. On-site
infrastructure to support the operation within the Study included buildings, dams, workshops,
water treatment plants, fuel facilities, accommodation, laboratory and other minor assets. A
tailings storage facility is envisaged and has been provided for in the Study to manage and treat
the waste streams from the processing plant.
2
Please refer to Company’s ASX announcement dated 22 August 2023.
3
Please refer to Company’s ASX announcement dated 29 August 2023.
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Environmental, Social, and Governance
The Project area is located within the Mitchell Grass Downs (MGD) bioregion and is comprised
of open grassland dominated by Mitchell grass tussock grasslands on rolling plains. The Project
area is used for cattle grazing on unimproved pasture and is in a largely undisturbed state.
Desktop searches for MNES and MSES (Matters of National and State Environmental
Significance respectively) have been undertaken and will be followed up in future studies.
Given the size of the existing workforce and the number of proponents operating in the area, a
Social Impact Assessment (SIA) may be required to assess the potential benefits and impacts
the Project may have on the social values of the local and regional communities. The SIA would
involve consultation with identified interested and affected stakeholders, including the local
community (including businesses), landowners, Indigenous groups, Council, State and Local
government representatives and other specialist interest groups. CMG have commenced
engagement with the McKinlay Shire Council and relevant State Government representatives.
This early engagement and feedback from previous work by other parties have indicated some
consistent themes central to all engagement and community consultation activities which will be
followed up in a tailored stakeholder engagement program so that key community concerns and
feedback can be recorded and considered, and that meaningful stakeholder engagement informs
all aspects of the Project
Marketing
An assessment of the vanadium market identified the global vanadium production totals
approximately 140,000 tonnes, with most of the production originating from China and Russia
using slag, a by-product from the steel making process in addition to a limited number of
vanadium mines in Brazil and South Africa. Approximately 92% of the vanadium is used in steel
applications. The emerging use of vanadium in energy storage applications shows a strong
growth predicted within the vanadium redox flow batteries (VRFB) market with projections
showing a Compound Average Growth Rate (CAGR) of 19.5% to 2030 and beyond (Wood
Mackenzie Mar 23).
Vanadium prices are subject to a moderate level of volatility due to factors such as global steel
production, demand from the energy storage sector, supply disruptions, and changes in
government policies. The growth forecast from battery markets is significant for the foreseeable
future and is forecast to reach 33% of global market demand in 2030. (Wood Mackenzie Mar 23).
Economics
The financial analysis was carried out on a range of ROM production and mining schedules,
which indicated that the financial returns improved as ROM production levels increased,
however with an associated increase in capital costs. The financial analysis was carried out on
the 4 Mtpa ROM option producing vanadium pentoxide and molybdenum trioxide. The
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scoping study level results supported a viable vanadium mine, generating an after-tax IRR of
approximately 17%, and a positive NPV of approximately AUD 510 million (assuming USD$9.50
/ lb 98.5% V₂O₅, USD$57.5 / kg 99% MoO3 , FX of $0.68 and Royalty Rate 2.5%).
The capital estimate included the site infrastructure and processing facility to support a 4 Mtpa
ROM production capacity, producing vanadium and molybdenum. Direct capital costs were
estimated at approximately AUD 400 million (excluding indirect costs, EPCM, owners’ costs and
contingency), enabling average production levels per annum of approximately 10,500 tonnes of
vanadium pentoxide, and 550 tonnes of molybdenum trioxide. The Study however highlighted
opportunities which could be investigated, based on further engineering to reduce the current
overall capital cost estimate.
A sensitivity analysis was carried out on the Project’s NPV using key variables included as part
of the Study (see Figure below). Based on the post-tax results from the scoping study level
financial model (accuracy ±35%-50%), each of the key input variables was adjusted between the
limits of ±30% at 10% intervals, with all other variables held constant. The sensitivity analysis
included the key areas of influence on the Project results, i.e., V₂O5 price, AUD/USD exchange
rate, operating costs, capital costs and discount rate. The analysis indicates that the Project is
most sensitive to exchange rate fluctuations, followed by V₂O5 price, discount rate, operating
cost, and capital cost.
Figure 5 – Post Tax NPV Sensitivity
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Commenting on the results, Critical Minerals Group Managing Director, Scott Winter, said:
“We are excited to announce that the Lindfield Vanadium project has been assessed as a
financially viable mining project. With an IRR and positive NPV of approximately 17% and $510
million respectively from the vanadium pentoxide and molybdenum trioxide products streams,
this is a terrific result and one that underpins the next phase of study and test-work. CMG has
been focussed on assessing the resource to identify the potential for the various viable product
streams and the results show that vanadium pentoxide, high purity alumina and molybdenum
trioxide are all profitable. The economic analysis has only included the vanadium and
molybdenum product streams but when the market opportunity arises we see the HPA as
significant upside to the returns.
“The study has been a success in developing and refining our process flow sheet to the point of
achieving concentrate and recovery grades that warrant the next phase of pilot plant testing.
Furthermore, the testing has identified a potentially significant upside in the overall resource with
the positive beneficiation results achieved in the processing of the upper horizon. An assessment
of the site-based development infrastructure has estimated the direct capital costs at
approximately AUD 400 mil (not including indirect costs, EPCM, owner’s costs and contingency),
with approximately opportunities for reductions in capital as further detailed engineering is
progressed.
“We are also encouraged by the availability and accessibility of utilities including power, water
and gas that will be required to support the project. These will be provided through a combination
of existing infrastructure, new regional infrastructure and planned on-site facilities.
The study has highlighted to CMG that the strategy to progress with the development of a
vanadium pentoxide operation will generate significant returns for shareholders and bring
ongoing benefits to local stakeholders in the Julia Creek region. It has also identified where the
areas of risk such as market volatility and approvals and opportunity such as other by-products
and government grant incentives exist so that we can focus on further improving the project.”
This announcement was approved for release by the board.
For more information:
Scott Winter
Managing Director
info@criticalmineralsgroup.com.au
+61 (0) 7 5555 5077
Jane Morgan
Media & Investor Relations
+61 (0) 405 555 618
About Critical Minerals Group Limited
Critical Minerals Group Limited (ASX:CMG, “CMG” or the “Company”) is an exploration
company with the principle focus of developing critical minerals projects. CMG was formed to
identify, secure, acquire and develop critical mineral resource tenements in proven regions in
Australia.
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CMG is building its position in the vanadium market, holding a tenement in north-west
Queensland near the town of Julia Creek which is its flagship project known as the Lindfield
Vanadium Project. CMG also holds applications for projects at Figtree Creek and Lorena
Surrounds, both exciting greenfield copper-gold projects that support CMG’s focus on critical
mineral opportunities.
CMG is founded on the outlook of the global energy disruption and the transition that is currently
underway and the chance to grasp the opportunities arising from the substantial changes in the
world around us. The rising standard of living of a growing global population is likely to continue
to drive demand for critical minerals for years to come, particularly during the phase of
decarbonisation and electrification. The world will need to find a way to meet this growing demand
for such minerals, and CMG is well-positioned to meet this new economy mineral demand as the
world turns towards a more renewable future.
Competent Person Statements
The information above that relates to Mineral Resource estimates is based on, and fairly
represents, information compiled by Adrian Buck, a Competent Person, who is a Member of the
Australasian Institute of Mining and Metallurgy (AusIMM). Adrian Buck is the Principal Geologist
– Australia for John T Boyd Company. Adrian Buck has sufficient experience with the style of
mineralisation and type of deposit under consideration, and to the activities undertaken to qualify
as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of
Exploration Results, Exploration Targets, Mineral Resources and Ore Reserves’. Adrian Buck
consents to the inclusion of the matters based on their information in the form and context in
which it appears.
The information above that relates to metallurgy and metallurgical test work is based on, and
fairly represents, information compiled by Nicola Semler, a Competent Person, who is a Member
of the Australasian Institute of Mining and Metallurgy (AusIMM). Nicola Semler is the Metallurgist
and Chief Technical Officer – CMG. Nicola Semler has sufficient experience with the style of
mineralisation and type of deposit under consideration, and to the activities undertaken to qualify
as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of
Exploration Results, Exploration Targets, Mineral Resources and Ore Reserves’. Nicola Semler
consents to the inclusion of the matters based on their information in the form and context in
which it appears.
The information above that relates to mining engineering and mine planning is based on, and
fairly represents, information compiled by Gary Benson. Mr Benson BE is a Mining Engineer with
40 years of experience and is a Fellow of the Australasian Institute of Mining and Metallur
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