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Mutooroo Magnetite Project Inferred Resource Estimate of the
Muster Dam Magnetite Fe Deposit and
Regional Magnetite Fe Potential 19th October 2012
Andrew Burtt, Project Geologist
Staff Update Minotaur Head Office
Mutooroo Magnetite Project Maiden Resource Location Braemar Fe stones Helimagnetics Magnetic modelling and resource drillhole planning Resource Drilling Davis Tube Recovery Testwork Petrology Geotech Duffields and Regional Drilling Muster Dam Resource and Exploration Target Update
Maiden JORC Inferred Resource
1.5 Billion Tonnes @ 15.2% DTR and 18.02% Fe (Head) at 10% DTR cut-off
with 228 Mt of contained magnetite concentrate
Concentrate Grade Fe 69.8% Al2O3 0.4% P2O5 0.002% S 0.002% SiO2 2.8% LOI -3.3%
Location
Braemar Ironstones
Area 1 Area 2
Area 3
3,497 line kilometres with flight line spacing of 50m and terrain clearance of 25m
Heli-magnetics
Muster Dam Magnetic Anomaly Outcropping steeply east dipping, magnetite-bearing diamictite and siltstone
2D Forward Modelling 15 Sections Modelled
Section: MDN001
Section: MDN001
Section: MDN001
Planned Resource Drillholes
Section: MDN001
36 planned RC drillholes for 10,600m on
400m sections 150m apart
Resource Drilling
Section: MDN001
49 x RC drillholes for 13,031m 10 x Diamond drillholes for 2,883m
Diamictite
Siltstone
Resource Drilling
Section: MDN001
Section MDN001
Excellent correlation between modelled and drilling
Section: MDN001
Section MDN001
Resource Drilling Excellent correlation between modelled and drilling
Section: MDN001
Section MDN01
Resource Drilling Excellent correlation between drillholes using wireline logs
Section: MDN001
Section MDN04
Resource Drilling Excellent correlation between drillholes using wireline logs
Section: MDN001
Section MDN04
Resource Drilling Excellent correlation between drillholes using wireline logs
Low DTR Dilution zone
Section: MDN001
Sections MDN01 and MDN04
Resource Drilling Preliminary Lithostratigraphy
Low DTR Dilution zone
Davis Tube Recovery (DTR) 2,355 5m RC composite samples for DTR/XRF at 45µm grind size 558 5m ¼ core samples for DTR/XRF at 45µm grind size
Head sample input (20g) Magnetite concentrate sample recovered (DTR)
DTR or Mass Recovery = Wt Mag(g) / Wt Head(g)
Davis Tube Recovery (DTR) Sample Preparation Parameters Once produced the 150g sub- for DTR test work. Precisely weigh and record the 150g sub-sample weight Pulverise the 150g sub-sample in a C125 ring pulveriser for 90 seconds Wet screen the sample at 45 micron and record oversize weight Dry and regrind the oversize material for 4 seconds for every 5g of oversize sample Repeat the screening until less than 5g is above 45 microns Filter press the total sample, dry and homogenise Using a 3 decimal place balance, extract from the pulverised product a 20g sample for DTR test work.
DTR parameters The precisely weighed 20g sub-sample was subjected to Davis Tube Recovery test work using the following parameters: Stroke Frequency 60/minute Stroke Length 38mm Magnetic Field 3000 gauss Tube Angle 45 degrees Tube Diameter 25mm Washing Time 20 minute or until clear
A magnetic concentrate or DTR is collected in a small container after washing is complete. The magnetic concentrate is then vacuum filtered, washed, dried and precisely weighed
DTR or Mass Recovery = Wt Mag(g) / Wt Head(g)
Davis Tube Recovery (DTR)
1.5 Bt @ 15.2% DTR with Fe recovery Wt. Mag (DTR) x Fe% (Conc) --------------------------------------- Wt. Head (~20g) x Fe% (Head) Av. 59% Fe recovery at 69% Fe conc
0
20
40
60
80
100
120
60 62 64 66 68 70 72 74
Fe%
Rec
over
y
Fe% grade DTR Concentrate
Muster Dam Magnetite Iron Deposit Fe% grade DTR conc vs Fe% recovery
Testwork Bulk sample - MD003: 30 255m Resource Analysis Average for interval: DTR 16.55%, Fe(c) 69.93%, SiO2(c) 2.55%, Fe(h) 18.57%, SiO2(h) 49.48% Testwork
1m samples composited to 5m then split of 5m combined to produce bulk sample without grinding Wet sieve and size distribution to -53um Cyclosizing of -53um and -45um sample Wet Low Intensity Magnetic Separation (WLIMS) at -53 and -45 um
Testwork
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50
0 10 20 30 40 50 60 70 80 90
Size
Pas
sing
(mm
)
Percent Passing (%)
Size Distribution
Series1
52.7% passing at 53um
Try and replicate action of RC hammer in initial crush-grind circuit to reduce capital and operating cost Carpentaria proposing hammer mills as first stage crush/grind
Testwork
Composite Feed (45um) Screen Head Conc
Mass Recovery to LIMS Mags (%)
Weight(kg) Total 9.981 19.02% Fe WLIMS Feed (-45) kg 4.5298 +45um 5.353 Mags 0.91668 68.78% Fe 20.26 -45um 4.628 Non-Mags 3.6083
9.981 kg @ 19.02% Fe = 1.916kg of Fe
screen
+45 um
5.353 kg
-45 um LIMS 4.5298 kg mag
Non-mag
3.6083 kg
0.917 kg @ 68.78% Fe (conc)
0.63 Kg of Fe 32% of original 1.916kg Fe
Wet Low Intensity Magnetic Separation (WLIMS)
Petrology Petrology observations
Hematite
Quartz
Mica
Magnetite
MDD005 200m
Matrix of diamictite same as siltstone Carbonate observed up to 10 to 25% though
usually <5% - reduces BWi Av. visual abundance of magnetite ~ 16% Av. visual abundance of hematite ~ 2-3% Mag and Hm occur as monomineralic
particles free of inclusions in 60:40 ratio Bonding of oxide grains to rock gangue is
weak indicating easy liberation Av. visual magnetite grainsize 25-60um
indicating grindsize of <45um to liberate grains No evidence of martitisation of magnetite or
complex intergrowths that are a result of secondary hm replacement of magnetite
Petrology Mutooroo vs Petrology Comparison
Hawsons and Mutooroo deposits exhibit remarkable similarity, as one would expect in an
Magnetite from both deposits tends to have a grain size which usually averages 40µ to 80µ and are free of inclusions
overall the Mutooroo samples are coarser grained Hematite develops in two habits in both deposits. It can be bladed to tabular and fabric-
equigranular Muster Dam hematite has magnetite lamellae Both deposits contain diagenetic 1) fabric and these develop in the more dolomite-rich material from both areas Tourmaline can be upto 1% and this phase, along with dolomite, anhydrite and apatite suggests perhaps a closed basin, saline depositional environment.
Petrology Petrology observations
Hematite with magnetite lamellae
Magnetite
MDD02-127.5m
As mag:hm ratio is 60:40 then maybe possible to extract extra Fe from the deposit if hm is paramagnetic
Geotech SRK Geotechnical Analysis of the Muster Dam Magnetite Fe Deposit
Groundwater conceptual model overall suggests that dewatering and depressurisation issues may be effectively managed using straightforward techniques No significant structural issues affecting the deposit however sedimentary bedding combined with two joints sets may form wedge failure of the pit wall Wedge analysis undertaken to determine minimum berm widths 5m footwall and 7m hangingwall Rock mass analysis undertaken with a note that the discontinuity count being regarded as artificially high resulting in SRK being conservative with the overall pit wall slope design Overall pit wall slope to be reviewed after upcoming geotech/metallurgical drilling as triple tubes will be implemented to reduce induced fracturing allowing a more accurate record of number of discontinuities.
Geotech
Note: Example design only Final design pending
Min Inter-ramp angle
Maximum Inter-ramp angle
Weathering Depth (m) Bench face angle
Bench height (m)
Berm Width (m)
Inter-ramp angle
Bench face angle
Bench height (m)
Berm Width (m)
Inter-ramp angle
HW Top 15m 50 15 9 35 50 15 9 35 SW 15 - 155m 70 20 12 45 70 20 9 50 UW 150 - 350m 70 20 9 50 70 20 7 55
Duffields and Regional Drilling
1 2
3
4
Duffields and Regional Drilling
1 2
3
4
1vd tmi image
Duffields and Regional Drilling
1 2
3
4 Hole-ID Prospect Type Interval (m) DTR mag% Fe_Head Fe_Conc SiO2_Conc Al2O3_Conc P_Conc S_Conc LOI_Conc
DFDD001 Duffields DDH 280 17.61 19.59 70.27 2.28 0.28 0.003 0.005 -3.24
DFDD002 Duffields DDH 305 16.60 19.06 69.56 3.06 0.27 0.00 0.01 -3.03
DF011 Duffields RC 195 18.24 20.98 70.56 2.09 0.20 0.003 0.005 -3.33
DF014 Duffields RC 100 16.55 18.61 69.92 2.68 0.30 0.002 0.006 -3.15
Average 17.25 19.56 70.08 2.53 0.26 0.003 0.006 -3.19
Duffields and Regional Drilling
1 2
3
4
Hole-ID Prospect Type Interval (m) DTR mag% Fe_Head Fe_Conc SiO2_Conc Al2O3_Conc P_Conc S_Conc LOI_Conc
MUT11 Peaked Hill West RC 75 16.85 17.67 69.48 2.97 0.52 0.002 0.020 -3.19
MUT12 Peaked Hill RC 100 20.19 19.14 69.60 3.34 0.28 0.003 0.004 -3.35
MUT15 Duffields West RC 125 14.51 18.51 70.58 2.11 0.20 0.002 0.002 -3.37
Muster Dam Resource DTR Mag Cut Off % BTonnes DTR Mag Recovery % Fe Head Grade %
6 1.60 14.84 17.96 8 1.58 14.93 18.02 10 1.51 15.18 18.20 12 1.36 15.64 18.57 14 1.02 16.47 19.17 16 0.54 17.74 20.01 18 0.18 19.38 20.77
Muster Dam Concentrate Grades
Category Billion Tonnes
Magnetite DTR %
Fe% Al2O3 % P2O5 % S % SiO2 % LOI %
Inferred 1.5 15.2 69.8 0.4 0.002 0.002 2.8 -3.3
Exploration Target
Target Area No of Bands
Strike (km) Thickness (m)
Volume (Bill m3) Tonnage (Bt)
Muster Dam 1 5.5 to 6.5 100 to 325 0.30 to 0.45 1.0 to 1.5 Muster Catch 2 1.7 to 2.3 80 to 150 0.03 to 0.06 0.05 to 0.15 Muster South 1 1.7 to 2.3 80 to 120 0.03 to 0.06 0.05 to 0.15 Duffield 1 1 3.0 to 3.5 100 to 300 0.09 to 0.13 1.0 to 1.5 Duffield 2 2 1.5 to 2.5 80 to 100 0.25 to 0.40 0.1 to 0.3
Surrender Dam 4 3.0 to 3.5 80 to 150 0.10 to 0.15 0.2 to 0.4 Totals 16.4 to 20.6 80-325 0.80 to 1.25 2.4 to 4.0
The term should not be misconstrued as an estimate of Mineral Resources and Reserves as defined in the JORC Code (2004), and the term has not been used in that context. The term is conceptual in nature and it is uncertain if further exploration will result in the determination of a Mineral Resource. Refer Clause 18 of the JORC Code (2004).
Target Area Bands Strike (km) Thickness (m) Volume (Bill m3) Tonnage (Bt) Muster South 1 1.7 to 2.3 80 to 120 0.05 to 0.1 0.15 to 0.3 Muster Catch 2 1.7 to 2.3 80 to 150 0.05 to 0.12 0.15 to 0.3 Duffields 1 1 4.5 to 5.0 150 to 450 0.3 to 0.65 1.0 to 1.9 Duffields 2 2 1.5 to 2.5 80 to 100 0.05 to 0.08 0.15 to 0.2 Surrender Dam 4 3.0 to 3.5 80 to 150 0.1 to 0.17 0.3 to 0.5 Peaked Hill 1 1.0 to 1.2 40 to 60 0.015 to 0.025 0.05 to 0.08 Peaked Hill West 1 1.0 to 2.0 50 to 100 0.03 to 0.06 0.09 to 0.18 Pegline Dam 1 1.0 to 1.5 120 to 230 0.07 to 0.1 0.2 to 0.3 Red Dam 1 0.8 to 1.0 120 to 230 0.055 to 0.07 0.15 to 0.2 16.2 to 21.3 80 to 450 0.7 to 1.4 2.2 to 4.2
Initial Exploration Target
Updated Exploration Target
+ 1.5 Bt at Muster Dam
Total 4 to 6 Bt
Project Future
Metallurgical testwork diamond core drilling Including Hematite recovery testwork Crush and grind technique optimisation e.g. Impact crushers Determine optimum P80 grind size to maximise Fe recovery
Completion of Scoping Study
Disclaimer This presentation has been prepared by the management of Minotaur Exploration Limited (ASX: MEP) for the general benefit of analysts, brokers and investors and does not constitute specific advice to any particular party or persons. Information herein is based on publicly available information, internally developed data and other sources. Where an opinion, projection or forward looking statement is expressed in this presentation, it is based on the assumptions and limitations mentioned herein and is an expression of present opinion only. No warranties or representations are made or implied as to origin, validity, accuracy, completeness, currency or reliability of the information. MEP specifically disclaims and excludes all liability (to the extent permitted by law) for losses, claims, damages, demands, costs and expenses of whatever nature arising in any way out of or in connection with the information, its accuracy, completeness or by reason of reliance by any person on any of it. Where MEP expresses or implies an expectation or belief as to the success of future exploration and the economic viability of future project evaluations, such expectation or belief is expressed in good faith and is believed to have a reasonable basis. However, such projected outcomes are subject to risks, uncertainties and other factors which could cause actual results to differ materially from projected future results. Such risks include, but are not limited to, exploration success, metal price volatility, changes to current mineral resource estimates or targets, changes to assumptions for capital and operating costs as well as political and operational risks and government regulatory outcomes. MEP disclaims any obligation to advise any person if it becomes aware of any inaccuracy in or omission from any forecast or to update such forecast.
Information in the foregoing presentation that relates to Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Dr A. P. Belperio, who is a Director and full-time employee of the Company and a Fellow of the Australasian Institute of Mining and Metallurgy. Dr A. P. Belperio has a minimum of 5 years experience, which is relevant to the style of mineralisation and 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 Resources and Ore Reserves . Dr A. P. Belperio consents to inclusion in the presentation of matters based on his information in the form and context in which it appears.