RARE EARTH FEED GRADES INCREASED BY UP TO 148%
Released
Released
Announcement PDF
6 July 2023
RARE EARTH FEED GRADES INCREASED BY UP TO 148%
•
Metallurgical beneficiation testwork shows North Stanmore clay samples are highly
amenable to upstream beneficiation, which has the potential to significantly reduce
downstream processing costs and capital costs per product tonne.
•
Average TREYO head grade across 31 samples increased from 1308 ppm to 2192 ppm
through rejecting +20 µm coarse material.
•
Size by assay analysis shows that up to 70% of rare earths are hosted in the fine -20
µm size fraction, in as low as 28% of the total mass.
•
Beneficiation testwork on a composite of 31 samples from within the pending initial
JORC Mineral Resource Estimate area shows rejecting the +20 µm coarse fraction
results in an average REE upgrade of 68%, with corresponding REE recovery of 58%
and mass rejection of 66%.
•
Stage 2 metallurgical testwork program is well underway which includes flow sheet
design to produce a mixed rare earth carbonate (MREC) as the end product.
Victory Metals Limited (ASX:VTM) (“Victory” or “the Company”) is pleased to announce it has
received further successful metallurgical test results using size by assay analysis on drill samples
from the North Stanmore Rare Earth Element Project (“North Stanmore” or the “Project”),
located approximately 10km north from the town of Cue, Western Australia with direct access
to the Great Northern Highway.
The beneficiation metallurgical results were received from a total of 31 AC drill samples,
obtained within the JORC Resource modelling area, which were combined into ten
metallurgical composites representing various geometallurgical domains for testwork.
Victory’s Chief Executive Officer and Executive Director Brendan Clark, commented:
“Metallurgical beneficiation has led to significant improvements in the plant feed grade of
rare earth elements at North Stanmore, with the success of this program proving the high
potential to reduce downstream processing and capital costs per product tonne at North
Stanmore.”
“In simple terms, by rejecting the +20 µm coarse material not only did Victory’s total rare earth
oxide grade (TREO) significantly increase, the testwork program has also demonstrated that
58% of the rare earth concentration can be recovered by only processing 34.7% of the ore”.
“Victory’s initial JORC Mineral Resource Estimate is expected to be reported to the market in
the coming weeks, along with these very positive results from this beneficiation testwork
program and the excellent metallurgical recoveries that have already being reported paving
the way for an exciting future for Victory and its shareholders”.
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Core Resources (“Core”), commented:
“Core is excited to be working on the North Stanmore project with Victory Metals. The recent
beneficiation testwork has shown the potential to substantially increase the grade of rare
earth elements in North Stanmore ore with simple physical beneficiation. This work follows
prior successful leach testing on North Stanmore samples and will complement ongoing Stage
2 leach optimisation testwork. Core looks forward to continuing the work with Victory Metals
to ultimately develop the metallurgical flowsheet for the North Stanmore project.”
Metallurgical Beneficiation Testwork
Beneficiation metallurgical testing, as part of the stage 2 metallurgical testwork program, was
undertaken by Core in Brisbane in June 2023. The aim of beneficiation testwork was to
determine if REE can be upgraded by classification, with either screens or hydrocyclones, to
reject a coarse low-grade fraction. This would be implemented upstream of REE leaching as
shown below in a typical REE clay processing flowsheet. The rejection of low-grade ore and
subsequent increase in downstream REE feed grade is likely to reduce downstream reagent
consumption and equipment sizing, thereby significantly reducing operating and capital costs
for the overall circuit.
Figure 1: General Proposed Flowsheet for REE Clay Processing
The beneficiation testwork was carried out on ten sample composite blends, VTM010 to
VTM019, produced from 31 AC drill samples. Samples were selected from the North Stanmore
project and aligned with the JORC resource modelling. The samples, with drill collar
information, used to generate composite blends are given in Appendix A.
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Size by assay analysis of the ten composites is summarised in Table 1 and has shown that:
•
58.2% of the rare earths on average report to the target size fraction of -20 µm, with
a range of 46.5% to 70.3%.
•
The -20 µm size fraction only accounts for 34.7% of the total sample mass on average,
with a range of 28.3% to 41.3%. This equates to a rejection of 65.3% on average of
the feed ore to the coarse +20 µm fraction, with a rejection range of 58.2% to 71.7%
•
The rare earth concentration in the -20 µm fraction is 68% on average higher in grade
compared to the beneficiation head grade, resulting in an average grade increase
from 1308 ppm TREYO to 2192 ppm TREYO with rejection of the +20 µm fraction. This
upgrading ranged from 42% to 148%.
-20 µm Fraction
Assays
Distribution
TREYO HREO¹ TREYO HREO
ppm
ppm
%
%
Upgrade Ratio
TREYO
HREO
Composite
Mass
%
VTM010 - Master Composite
34.7
2192
896
58.2
57.5
1.68
1.65
VTM011 - 0.14 Ce/Ce* Blend
28.3
2820
1193
70.3
69.0
2.48
2.44
VTM012 - 0.37 Ce/Ce* Blend
41.8
1679
618
66.1
67.0
1.58
1.60
VTM013 - 0.51 Ce/Ce* Blend
31.0
1701
645
46.5
48.3
1.50
1.56
VTM014 - 0.65 Ce/Ce* Blend
36.7
1396
519
52.3
55.7
1.42
1.52
VTM015 - 0.83 Ce/Ce* Blend
35.9
2173
969
54.3
57.6
1.51
1.60
VTM016 - 0.24 HREO Ratio Blend
37.9
1386
355
55.5
54.2
1.46
1.43
VTM017 - 0.41 HREO Ratio Blend
38.8
2134
925
67.2
69.6
1.73
1.80
VTM018 - 0.52 HREO Ratio Blend
29.3
2260
1129
52.9
55.0
1.80
1.87
VTM019 - >1500 ppm TREYO Blend
31.7
4156
2015
HREO – Eu2O3, Gd2O3, Tb4O7, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3 and Y2O3
Ce/Ce* = (2*(CeN)/(LaN+PrN) where CeN, LaN and PrN are chondrite normalised values
53.7
53.3
1.69
1.68
Table 1: Summary Size by Assay Analysis for the Target -20 µm Fraction.
4500
TREYO Grade (ppm)
4000
3500
3000
2500
2000
1500
1000
500
0
Head
-20 µm
Figure 2: REE Grade in Head and -20 µm Size Fractions.
Page 3
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This announcement has been authorised by the Board of Victory Metals Limited.
For further information please contact:
Brendan Clark
CEO and Executive Director
b.clark@victorymetalsaustralia.com
Jane Morgan
Investor and Media Relations
jm@janemorganmanagement.com.au
Victory Metals Limited: Company Profile
Victory is focused upon the exploration and development of its Rare Earth Element (REE) and
Scandium Discovery in the Cue Region of Western Australia. Victory’s key assets include a
portfolio of assets located in the Midwest region of Western Australia, approximately 665 km
from Perth. Victory’s Ionic clay REE discovery is rapidly evolving with the system demonstrating
high ratios of Heavy Rare Earth Oxides and Critical Magnet Metals NdPr + DyTb.
Competent Person Statement
Professor Ken Collerson
Statements contained in this report relating to exploration results, scientific evaluation, and
potential, are based on information compiled and evaluated by Professor Ken Collerson.
Professor Collerson (PhD) Principal of KDC Geo Consulting, and a Fellow of the Australasian
Institute of Mining and Metallurgy (AusIMM), is a geochemist/geologist with sufficient
relevant experience in relation to rare earth element geochemistry, critical metal
mineralisation and REE systematics given in Core metallurgical data summaries that are being
reported on, to qualify as a Competent Person as defined in the Australian Code for Reporting
of Identified Mineral resources and Ore reserves (JORC Code 2012). Professor Collerson
consents to the use of this information in this report in the form and context in which it
appears.
The Company confirms that it is not aware of any new information or data that materially
affects the information included in the original market announcements in relation to the
exploration results. The Company confirms that the form and context in which the competent
persons findings have not been materially modified from the original announcement.
Page 4
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Figure 3. Regional Map showing Victory Metals tenement package and pending tenements.
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Appendix A: Sample Drill Collar Information and Blend Compositions
Sample ID
Hole ID
MGA
North
MGA
East
From
m
To
m
TREYO
ppm
315067
315068
315069
315070
315071
315072
315073
315074
315075
315076
315077
315078
315079
315080
315081
315082
315083
315084
315085
315086
315087
315088
315089
315090
315091
315092
315093
315094
315095
315096
315097
23NSTRC030
23NSTRC040
23NSTRC040
23NSTRC044
23NSTRC044
23NSTRC044
23NSTRC046
23NSTRC053
23NSTRC056
23NSTRC056
23NSTRC056
23NSTRC063
23NSTRC063
23NSTRC063
23NSTRC070
23NSTRC071
23NSTRC076
23NSTRC076
23NSTRC076
NSTAC098
NSTAC098
NSTAC098
NSTAC098
NSTAC098
NSTAC098
NSTAC170
NSTAC170
NSTAC170
NSTAC170
NSTAC170
NSTAC170
6974411
6974398
6974398
6974399
6974399
6974399
6974391
6974428
6974415
6974415
6974415
6973491
6973491
6973491
6973558
6973571
6973580
6973580
6973580
6973883
6973883
6973883
6973883
6973883
6973883
6976734
6976734
6976734
6976734
6976734
6976734
586509
587994
587994
588595
588595
588595
588898
589963
590400
590400
590400
587622
587622
587622
589431
589620
589577
589577
589577
588797
588797
588797
588797
588797
588797
589681
589681
589681
589681
589681
589681
33
30
31
18
19
20
28
53
65
75
76
45
46
49
33
38
34
35
37
22
24
25
26
28
29
28
29
30
31
32
34
34
31
32
19
20
21
29
54
66
76
77
46
47
50
34
39
35
36
38
23
25
26
27
29
30
29
30
31
32
33
35
1386
1064
903
1308
1561
1589
1893
1177
1009
1136
913
902
926
1431
1174
10498
3492
994
1131
1013
1623
1613
1013
1253
1436
1255
2497
1444
1034
1111
1033
Table 2. Drill collar information with depths of samples used in the metallurgical testwork.
Page 6
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Composite
Description
TREYO
Head Grade
ppm
Samples
VTM010
Master Composite
1308
All 31 samples, see Table 2
VTM011
0.14 Ce/Ce* Blend
1135
315068, 315069, 315073, 315076, 315077,
315080
VTM012
0.37 Ce/Ce* Blend
1063
315078, 315079, 315090, 315092, 315093,
315094
VTM013
0.51 Ce/Ce* Blend
1133
315072, 315087, 315089, 315091, 315095,
315096
VTM014
0.65 Ce/Ce* Blend
982
315070, 315071, 315075, 315081, 315084,
315097
VTM015
0.83 Ce/Ce* Blend
1437
315067, 315074, 315083, 315085, 315086,
315088
VTM016
0.24 HREO Ratio Blend
947
315067, 315070, 315071, 315075, 315078,
315079, 315086, 315091, 315092, 315095
VTM017
0.41 HREO Ratio Blend
1231
315073, 315074, 315080, 315085, 315087,
315090, 315093, 315094, 315096, 315097
VTM018
0.52 HREO Ratio Blend
1254
315068, 315069, 315072, 315076, 315077,
315081, 315083, 315084, 315088, 315089
VTM019
>1500 ppm TREYO Blend
2455
315071, 315072, 315073, 315082, 315083,
315087, 315088, 315093
Table 3: Sample Composite Information
Page 7
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Appendix B: Size by Assay Data
TREE: La-Lu + Y, Sc
HREE: Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y
LREE: La, Ce, Pr, Nd, Pm, Sm
VTM010 - Master Composite
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
234
86
11
13
22
195
41.7
15.4
1.9
2.3
3.9
34.7
-53 +38
-38 +20
-20
Calc. Head
TREY
ppm
Assays
HREE
ppm
Distribution
TREY
HREE LREE
%
%
%
Upgrade Ratio
TREY
HREE LREE
LREE
ppm
606
858
888
847
770
1811
1081
253
352
394
349
327
733
443
346
490
478
479
429
1055
623
23.4
12.2
1.6
1.8
2.8
58.2
0.56
0.79
0.82
0.78
0.71
1.68
TREY
ppm
Assays
HREE
ppm
LREE
ppm
TREY
%
306
495
594
582
720
2331
938
132
233
279
263
322
975
400
166
248
299
304
381
1329
523
16.3
5.2
1.9
2.3
4.0
70.3
TREY
ppm
Assays
HREE
ppm
LREE
ppm
TREY
%
376
755
722
680
663
1388
878
124
268
278
253
241
505
315
243
464
421
405
401
853
543
15.1
10.1
2.5
2.6
3.7
66.1
TREY
ppm
Assays
HREE
ppm
LREE
ppm
722
804
770
666
622
1405
936
205
368
359
298
279
527
338
508
420
393
350
326
853
582
23.8
12.2
1.7
1.8
2.9
57.5
23.2
12.1
1.5
1.8
2.7
58.8
0.57
0.79
0.89
0.79
0.74
1.65
0.56
0.79
0.77
0.77
0.69
1.69
VTM011 - 0.14 Ce/Ce* Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
231
46
14
17
24
131
49.8
9.9
3.0
3.7
5.3
28.3
-53 +38
-38 +20
-20
Calc. Head
Distribution
HREE LREE
%
%
16.5
5.8
2.1
2.4
4.2
69.0
15.8
4.7
1.7
2.2
3.8
71.8
Upgrade Ratio
TREY
HREE LREE
0.33
0.53
0.63
0.62
0.77
2.48
0.33
0.58
0.70
0.66
0.80
2.44
0.32
0.47
0.57
0.58
0.73
2.54
VTM012 - 0.37 Ce/Ce* Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
162
54
14
15
22
192
35.2
11.8
3.0
3.3
4.9
41.8
-53 +38
-38 +20
-20
Calc. Head
Distribution
HREE LREE
%
%
13.9
10.0
2.7
2.7
3.7
67.0
15.8
10.1
2.4
2.5
3.6
65.7
Upgrade Ratio
TREY
HREE LREE
0.43
0.86
0.82
0.77
0.76
1.58
0.39
0.85
0.88
0.80
0.76
1.60
0.45
0.85
0.78
0.75
0.74
1.57
VTM013 - 0.51 Ce/Ce* Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
185
49
19
18
27
134
42.9
11.3
4.4
4.1
6.3
31.0
-53 +38
-38 +20
-20
Calc. Head
Page 8
Distribution
TREY
HREE LREE
%
%
%
Upgrade Ratio
TREY
HREE LREE
33.1
9.7
3.6
2.9
4.2
46.5
0.77
0.86
0.82
0.71
0.66
1.50
26.0
12.2
4.7
3.6
5.2
48.3
37.4
8.1
3.0
2.5
3.5
45.4
0.61
1.09
1.06
0.88
0.82
1.56
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0.87
0.72
0.68
0.60
0.56
1.47
VTM014 - 0.65 Ce/Ce* Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
213
61
19
19
23
195
40.2
11.5
3.5
3.7
4.4
36.7
-53 +38
-38 +20
-20
Calc. Head
TREY
ppm
Assays
HREE
ppm
Distribution
TREY
HREE LREE
%
%
%
Upgrade Ratio
TREY
HREE LREE
LREE
ppm
571
663
795
693
648
1154
811
179
203
285
236
225
424
280
384
442
491
436
404
703
514
28.3
9.4
3.4
3.1
3.5
52.3
0.70
0.82
0.98
0.85
0.80
1.42
TREY
ppm
Assays
HREE
ppm
LREE
ppm
TREY
%
765
1119
1184
940
869
1796
1187
283
428
481
400
404
792
494
474
679
689
526
452
982
680
28.5
7.3
3.1
2.7
4.1
54.3
TREY
ppm
Assays
HREE
ppm
LREE
ppm
493
700
682
644
617
1146
783
121
194
201
195
205
290
203
TREY
ppm
455
781
772
654
730
1764
1018
25.7
8.4
3.6
3.1
3.5
55.7
30.0
9.9
3.4
3.1
3.4
50.2
0.64
0.73
1.02
0.84
0.81
1.52
0.75
0.86
0.95
0.85
0.79
1.37
VTM015 - 0.83 Ce/Ce* Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
206
36
14
16
26
167
44.2
7.8
3.1
3.4
5.6
35.9
-53 +38
-38 +20
-20
Calc. Head
Distribution
HREE LREE
%
%
25.3
6.7
3.0
2.7
4.6
57.6
30.9
7.8
3.1
2.6
3.7
51.9
Upgrade Ratio
TREY
HREE LREE
0.64
0.94
1.00
0.79
0.73
1.51
0.57
0.87
0.97
0.81
0.82
1.60
0.70
1.00
1.01
0.77
0.66
1.45
VTM016 - 0.24 HREO Ratio
Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
296
88
30
29
34
292
38.5
11.5
3.9
3.7
4.5
37.9
-53 +38
-38 +20
-20
Calc. Head
Distribution
TREY
HREE LREE
%
%
%
Upgrade Ratio
TREY
HREE LREE
361
485
460
427
392
826
559
24.2
10.3
3.4
3.1
3.5
55.5
0.63
0.89
0.87
0.82
0.79
1.46
Assays
HREE
ppm
LREE
ppm
TREY
%
155
346
350
292
313
756
421
295
420
404
345
401
983
582
18.7
5.7
2.3
2.3
3.8
67.2
22.9
11.0
3.9
3.6
4.5
54.2
24.8
10.0
3.2
2.8
3.1
56.0
0.59
0.96
0.99
0.96
1.01
1.43
0.65
0.87
0.82
0.76
0.70
1.48
VTM017 - 0.41 HREO Ratio
Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
342
60
25
29
43
316
41.9
7.4
3.1
3.6
5.2
38.8
-53 +38
-38 +20
-20
Calc. Head
Page 9
Distribution
HREE LREE
%
%
15.4
6.1
2.6
2.5
3.9
69.6
21.3
5.3
2.1
2.1
3.6
65.5
Upgrade Ratio
TREY
HREE LREE
0.45
0.77
0.76
0.64
0.72
1.73
0.37
0.82
0.83
0.69
0.74
1.80
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0.51
0.72
0.70
0.59
0.69
1.69
VTM018 - 0.52 HREO Ratio
Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
368
83
28
32
39
229
47.2
10.6
3.6
4.1
5.1
29.3
-53 +38
-38 +20
-20
Calc. Head
TREY
ppm
Assays
HREE
ppm
Distribution
TREY
HREE LREE
%
%
%
Upgrade Ratio
TREY
HREE LREE
LREE
ppm
653
778
785
739
756
1867
1036
289
361
371
356
368
923
493
353
399
395
365
369
919
527
29.7
8.0
2.8
3.0
3.7
52.9
0.63
0.75
0.76
0.71
0.73
1.80
TREY
ppm
Assays
HREE
ppm
LREE
ppm
TREY
%
1282
1664
1557
1425
1511
3434
2029
655
738
686
638
694
1648
981
618
909
853
767
799
1761
1032
29.6
8.7
2.4
2.5
3.1
53.7
27.7
7.8
2.7
3.0
3.8
55.0
31.7
8.1
2.7
2.9
3.5
51.1
0.59
0.73
0.75
0.72
0.75
1.87
0.67
0.76
0.75
0.69
0.70
1.74
VTM019 - >1500 ppm TREYO Blend
Size fraction
µm
Mass
g
Mass
%
+106
-106 +75
-75 +53
290
65
20
22
26
196
46.8
10.6
3.2
3.5
4.1
31.7
-53 +38
-38 +20
-20
Calc. Head
Page 10
Distribution
HREE LREE
%
%
31.3
8.0
2.2
2.3
2.9
53.3
28.1
9.3
2.6
2.6
3.2
54.2
Upgrade Ratio
TREY
HREE LREE
0.63
0.82
0.77
0.70
0.74
1.69
0.67
0.75
0.70
0.65
0.71
1.68
“THE FUTURE OF AUSTRALIAN RARE EARTHS”
ACN: 124 279 750
E: info@victorymetalsaustralia.com D: +61 (08) 6555 2950 A: Suite 1, 295 Rokeby Road, Subiaco, WA, 6008
0.60
0.88
0.83
0.74
0.77
1.71
JORC Code, 2012 Edition – Table 1
Section 1 Sampling Techniques and Data
Criteria
JORC Code explanation
Sampling techniques
•
•
Drilling techniques
Nature and quality of sampling (eg cut channels, random chips, or
specific specialised industry standard measurement tools
appropriate to the minerals under investigation, such as down hole
gamma sondes, or handheld XRF instruments, etc). These examples
should not be taken as limiting the broad meaning of sampling.
Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any measurement
tools or systems used.
•
Aspects of the determination of mineralisation that are Material to
the Public Report.
•
In cases where ‘industry standard’ work has been done this would
be relatively simple (eg ‘reverse circulation drilling was used to
obtain 1 m samples from which 3 kg was pulverised to produce a 30
g charge for fire assay’). In other cases more explanation may be
required, such as where there is coarse gold that has inherent
sampling problems. Unusual commodities or mineralisation types
(eg submarine nodules) may warrant disclosure of detailed
information.
•
Drill type (eg core, reverse circulation, open-hole hammer, rotary
air blast, auger, Bangka, sonic, etc) and details (eg core diameter,
Commentary
•
•
Victory Metals Australia (ASX:VTM) completed three aircore
drilling campaigns at North Stanmore during the period MayDecember 2022.
Aircore (AC) drilling samples were collected as 1-m samples from
the rig cyclone and placed on top of black plastic that was laid on
the natural ground surface to prevent contamination in separate
piles and in orderly rows.
•
Using a hand-held trowel, 4m composite samples were collected
from the one-meter piles.
•
These composite samples weighed between 2 and 3 kgms.
•
A handheld pXRF analyzer (Olympus Vanta) was used to
determine anomalous REE (Rare earth element) geochemistry
from the on ground 1-m sample piles.
•
pXRF reading times were 45 secs over 3 cycles for multielement
and REE assays.
•
These results are not considered reliable without calibration
using chemical analysis from an accredited laboratory.
•
The pXRF is used as a guide to the relative presence or absence of
certain elements, including REEs to help direct the sampling
program.
•
Anomalous Samples were collected using a handheld trowel and
placed into calico bag weighing 2-3 kgms, ready for transporting
to the assay lab for analysis.
•
REE anomalism thresholds are determined by Victory Metals
geologists based on historical data analysis.
•
Air core drilling uses a three-bladed steel or tungsten drill bit to
penetrate the weathered layer of loose soil and rock fragments.
Criteria
JORC Code explanation
triple or standard tube, depth of diamond tails, face-sampling bit or
other type, whether core is oriented and if so, by what method,
etc).
Drill sample recovery
Logging
•
Method of recording and assessing core and chip sample recoveries
and results assessed.
•
Measures taken to maximise sample recovery and ensure
representative nature of the samples.
•
Whether a relationship exists between sample recovery and grade
and whether sample bias may have occurred due to preferential
loss/gain of fine/coarse grained material.
•
Whether core and chip samples have been geologically and
geotechnically logged to a level of detail to support appropriate
Mineral Resource estimation, mining studies and metallurgical
studies.
•
Whether logging is qualitative or quantitative in nature. Core (or
costean, channel, etc) photography.
•
The total length and percentage of the relevant intersections
logged.
Commentary
The drill rods are hollow and feature an inner tube with an outer
barrel (similar to RC drilling).
•
Air core drilling uses small compressors (750 cfm/250 psi) to drill
holes into the weathered layer of loose soil and fragments of
rock.
•
After drilling is complete, an injection of compressed air is
unleashed into the space between the inner tube and the drill
rod’s inside wall, which flushes the cuttings up and out of the
drill hole through the rod’s inner tube, causing Less chance of
cross-contamination.
•
Air core drill rigs are lighter in weight than other rigs, meaning
they’re quicker and more manoeuvrable in the bush.
•
AC Drilling was performed by Seismic Drilling of Wangara and
Orlando Drilling from Perth.
•
Representative air core samples collected as 2-meter intervals,
with corresponding chips placed into chip trays and kept for
reference at VTM’s facilities.
•
Most samples were dry and sample recovery was very good.
•
VTM does not anticipate any sample bias from loss/gain of
material from the cyclone.
•
No defined relationship exists between sample recovery and
grade. Sample bias due to preferential loss or gain of fine or
coarse material has not been noted.
•
VTM does not anticipate any sample bias from loss/gain of
material from the cyclone.
•
All aircore samples were lithologically logged using standard
industry logging software on a notebook computer.
All AC samples have been logged for lithology, alteration, quartz
veins, colour, fabrics.
Representative AC samples collected as 2-meter intervals, with
corresponding chips placed into chip trays and kept for reference
at VTM’s facilities.
•
•
•
Logging is qualitative in nature.
•
Samples have not been photographed.
Criteria
Sub-sampling techniques and
sample preparation
Quality of assay data and
laboratory tests
Verification of sampling and
assaying
JORC Code explanation
Commentary
•
All geological information noted above has been completed by a
competent person as recognized by JORC.
•
If core, whether cut or sawn and whether quarter, half or all core
taken.
•
Air core sampling was undertaken on 1m intervals using a
Meztke Static Cone splitter.
•
If non-core, whether riffled, tube sampled, rotary split, etc and
whether sampled wet or dry.
•
Most 1-meter samples were dry and weighed between 2 and 3
kgms.
•
For all sample types, the nature, quality and appropriateness of the
sample preparation technique.
•
Samples from the cyclone were laid out in orderly rows on the
ground.
•
Quality control procedures adopted for all sub-sampling stages to
maximise representivity of samples.
•
Using a hand-held trowel, 4m composite samples were collected
from the one-meter piles.
Measures taken to ensure that the sampling is representative of the
in-situ material collected, including for instance results for field
duplicate/second-half sampling.
•
•
These composite samples weighed between 2 and 3 kgms.
•
For any anomalous (>0.1 g/t Au) 4m composite sample assays,
the corresponding one-meter samples are also collected and
assayed.
•
Whether sample sizes are appropriate to the grain size of the
material being sampled.
•
Quality control of the assaying comprised the collection of a
duplicate sample every hole, along with the regular insertion of
industry (OREAS) standards (certified reference material) every
30 samples and blanks (beach sand) every 50 samples.
•
The nature, quality and appropriateness of the assaying and
laboratory procedures used and whether the technique is
considered partial or total.
•
Samples to be submitted for sample preparation and
geochemical analysis by ALS Perth.
In the field spot checks were completed on selected samples
using a hand held Olympus Vanta XRF unit. These results are not
considered reliable without calibration using chemical analysis.
They were used as a guide to the relative presence or absence of
certain elements, including REEs to help guide the drill program
•
•
For geophysical tools, spectrometers, handheld XRF instruments,
etc, the parameters used in determining the analysis including
instrument make and model, reading times, calibrations factors
applied and their derivation, etc.
•
Nature of quality control procedures adopted (eg standards, blanks,
duplicates, external laboratory checks) and whether acceptable
levels of accuracy (i.e. lack of bias) and precision have been
established.
•
The verification of significant intersections by either independent or
alternative company personnel.
•
No verification of significant intersections undertaken by
independent personnel, only the VTM project geologist.
•
The use of twinned holes.
•
Validation of 4m composite assay data was undertaken to
compare duplicate assays, standard assays and blank assays.
Criteria
Location of data points
Data spacing and distribution
Orientation of data in relation
to geological structure
Sample security
JORC Code explanation
Commentary
•
Comparison of assaying between the composite samples (aqua
regia digest) and the 1-meter samples (4 acid digest) will be
made.
•
ALS labs routinely re-assayed anomalous assays (greater than 0.3
g/t Au) as part of their normal QAQC procedures.
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.
•
All aircore drill hole coordinates are in GDA94 Zone 50
•
All aircore holes were located by handheld GPS with an accuracy
of +/- 5 m.
•
Specification of the grid system used.
•
•
Quality and adequacy of topographic control.
There is no detailed documentation regarding the accuracy of
the topographic control.
•
No elevation values (Z) were recorded for collars. An elevation
of 450 mRL was assigned by VTM.
•
There were no Down-hole surveys completed as aircore drill
holes were not drilled deep enough to warrant downhole
surveying.
•
Aircore drilling at Stanmore and Mafeking Bore was on 100
metre line spacing and 900 metres between drill holes.
•
Given the first pass nature of the exploration programs, the
spacing of the exploration drilling is appropriate for
understanding the exploration potential and the identification of
structural controls on the mineralisation.
•
Four- meter sample compositing has been applied.
•
Documentation of primary data, data entry procedures, data
verification, data storage (physical and electronic) protocols.
•
Discuss any adjustment to assay data.
•
•
Data spacing for reporting of Exploration Results.
•
Whether the data spacing and distribution is sufficient to establish
the degree of geological and grade continuity appropriate for the
Mineral Resource and Ore Reserve estimation procedure(s) and
classifications applied.
•
Whether sample compositing has been applied.
•
Whether the orientation of sampling achieves unbiased sampling of
possible structures and the extent to which this is known,
considering the deposit type.
•
The relationship between drill orientation and the mineralised
structures is not known at this stage as the prospects are
covered by a 2-10m blanket of transported cover.
•
If the relationship between the drilling orientation and the
orientation of key mineralised structures is considered to have
introduced a sampling bias, this should be assessed and reported if
material.
•
It is concluded from aerial magnetics that any mineralisation
trends 010-030. Dips are unknown as the area is covered by a
thin (1-5m) blanket of transported cover.
•
Azimuths and dips of aircore drilling was aimed to intersect the
strike of the rocks at right angles.
•
Downhole widths of mineralisation are not accurately known
with aircore drilling methods.
•
All samples packaged and managed by VTM personnel
•
The measures taken to ensure sample security.
Criteria
Audits or reviews
JORC Code explanation
•
The results of any audits or reviews of sampling techniques and
data.
Commentary
•
Larger packages of samples will be couriered to ALS from Cue by
professional transport companies in sealed bulka bags.
•
No sampling techniques or data have been independently
audited.
Section 2 Reporting of Exploration Results
Criteria
JORC Co
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