Benz Mining: PhotonAssay of 2020 Core Underway in Perth
Benz Mining: PhotonAssay of 2020 Core
Underway in Perth
HIGHLIGHTS
Reject samples from the 2020 drilling campaign have arrived at MinAnalytical in Perth,
Western Australia for analysis by PhotonAssay
Samples had been integrated in the laboratory schedule ahead of delivery to allow for
immediate start at reception and analysis has started
Whole rock analysis to be conducted capturing visible gold, observed in core and
potentially not reflected in standard fire assays
Historical analysis from 2010/11 programs highlighted that fire assays under called
grades by on average 34% compared with screen fire assays
Analysis run in conjunction with large scale heterogeneity test quantifying the nature of
the high-grade gold at the Eastmain deposit
Understanding and quantifying the nature of high-grade gold mineralisation will improve
future resource estimate and confidence
Toronto, Ontario--(Newsfile Corp. - July 7, 2021) - Benz Mining Corp. (TSXV: BZ) (ASX: BNZ) (the
Company
or
Benz
) is pleased to announce that a single shipment of over 8t of coarse rejects from its
2020 drilling campaign has been received by MinAnalytical's Perth laboratory from Quebec.
Coarse rejects are the leftover material from the processing of core samples during the assaying
process. On average, coarse rejects represent over 80% of the core samples submitted to Actlabs in
Quebec for standard fire assays in 2020 (fire assays with both AAS and gravimetric finish, only using a
50g subsample of the material submitted).
The industry standard fire assay method used in the 2020 drill program includes fine grinding and
pulverisation of samples to a particle size of 75µm. Due to the malleable nature of gold, nuggets with a
size over 75µm have a chance of being retained in the fraction of the sample that is not analysed.
Benz geologists have observed multiple occurrences of visible gold in the core from Eastmain. Visible
gold usually indicates that gold particles are larger than the 75µm of the sieve used in the fire assay
preparation.
CEO Xavier Braud Commented:
"The numerous observations of visible gold in core from the
Eastmain Project mean that we need to use an assay method best suited to high-grade gold.
PhotonAssay will give us a much better estimation of true gold grade in our drill core as the sample
method removes the bias created during the sample preparation in traditional assay methods. If this
round of assays shows that fire assay analytical methods have underestimated grades, then we can
legitimately ask ourselves about a potential underestimation of our current resource which is based on
historical fire assay results."
The coarse rejects shipped to Australia have been crushed to a size of 2mm.
The whole lot of the samples will be assayed, providing a whole rock analysis, capturing all the gold
present in each sample without the bias introduced by subsampling, fine grinding and sieving.
The expectation is that a method capturing the oversized gold fraction will return more accurate assays
better correlating grade and geological observations.
Figure 1: EM20-137, Fire Assay results: 1.5m at 2.8g/t Au from 519.5, 30 grains of visible gold
observed (being re-assayed by PhotonAssay)
To view an enhanced version of this graphic, please visit:
https://orders.newsfilecorp.com/files/1818/89648_pic1.jpg
Figure 2: EM20-132 - Fire Assay Results - 3.0m at 13.7g/t Au from 531.8m, one grain of visible
gold observed (being re-assayed by PhotonAssay)
To view an enhanced version of this graphic, please visit:
https://orders.newsfilecorp.com/files/1818/89648_b7095947f45009dd_004full.jpg
Screen fire assays (metallic screen) (SFA-Grav) vs. fire assays (FA-AAS) in 2010-11 drill results
from the Eastmain Project
During the 2010 and 2011 drilling campaigns at Eastmain, observations of visible gold prompted the
geological team to submit samples for both fire assays (FA-AAS) and screen fire assays (metallic
screen) (SFA-Grav).
A total of 361 samples were submitted for analysis with 2 duplicate measurements conducted by FA-
AAS and one by SFA-Grav. The average gold grade over the 361 samples by standard fire assay is
2.24g/t Au whilst metallic screen returned an average of 3.04g/t Au, an increase of 34% in the average
measured grade.
The graph in Figure 3 shows a plot of the historical results by SFA-Grav versus results obtained by FA-
AAS (average of the 2 duplicate results).
Figure 3: Assays by fire assays vs screen fire assays in 361 sets of duplicates from 2010 and
2011 drilling campaigns
To view an enhanced version of this graphic, please visit:
https://orders.newsfilecorp.com/files/1818/89648_picture1.jpg
Both metallic screen and standard fire assay methods use a subsample from the half core sample
submitted to the laboratory.
In the case of fire assays, the aliquot (the final sample physically used for analysis) is 50g.
In the case of metallic screen FA, the aliquot used is 1kg.
Both fire and metallic screen fire assays involve some level of preparation of the sample.
In the case of fire assays, the whole half core sample is crushed down to a maximum particle size
of 2mm. Then a subsample of 250g is pulverized until 80% of the sample passes a 75µm mesh.
The final aliquot is obtained by sampling 50g from the fraction finer than 75µm.
In the case of screen fire assays, the whole half core sample is crushed for a set period of time. A
1kg subsample is collected and screened through a 106µm mesh. The coarse and fine fractions
are assayed separately by fire assay and the final reported result is a weighted average of the
coarse and fine fraction analysis.
Screen fire assays partly remove the sampling bias introduced by the small size of the subsample and
the fine grinding to 75µm used in fire assays.
Benz has used both the standard 50g fire assay with AAS and gravimetric finish and, in 2021, has used
metallic screen FA with gravimetric finish for mineralised samples and those with visible gold.
Benz is currently analysing core sample rejects from its 2020 drilling campaign by PhotonAssay, a
technology using high energy x-ray fluorescence.
PhotonAssay technology should be an improvement on both analytical methods for the following
reasons:
100% of rejects sampled (>80% of the core samples originally submitted) - larger sample
No fine grinding - no further processing of the material than standard 2mm crush
No screening bias
No destruction of the sample - the samples can still be assayed by another method afterwards
Further details on PhotonAssay technology can be found here.
https://www.chrysos.com.au/replacing-
fire-assay
The Eastmain Gold Project, situated on the Upper Eastmain Greenstone Belt in Quebec, Canada,
currently hosts a NI 43-101 and JORC (2012) compliant resource of 376,000oz at 7.9gpt gold (Indicated:
236,500oz at 8.2gtp gold, Inferred: 139,300oz at 7.5gtp gold). The existing gold mineralization is
associated with 15-20% semi-massive to massive pyrrhotite, pyrite and chalcopyrite in highly deformed
and altered rocks making it amenable to detection using electromagnetic techniques.
Multiple gold
occurrences have been identified by previous explorers over a 10km long zone along strike from the
Eastmain Mine with very limited but highly encouraging testing outside the existing resource area.
This press release was prepared under supervision and approved by Dr. Danielle Giovenazzo, P.Geo,
acting as Benz's qualified person under National Instrument 43-101.
About Benz Mining Corp.
Benz Mining Corp. brings together an experienced team of geoscientists and finance professionals with
a focused strategy to acquire and develop mineral projects with an emphasis on safe, low risk
jurisdictions favourable to mining development. Benz is earning a 100% interest in the former producing
high grade Eastmain gold mine, Ruby Hill West and Ruby Hill East projects in Quebec.
The Eastmain Gold Project is situated within the Upper Eastmain Greenstone Belt in Quebec, Canada
and currently hosts a NI 43-101 and JORC (2012) compliant resource of 376,000oz at 7.9gpt gold. The
existing gold mineralization is associated with 15-20% semi-massive to massive pyrrhotite, pyrite and
chalcopyrite making it amenable to detection by electromagnetics.
Several gold mineralization
occurrences have been identified by previous explorers over a 10km long zone along strike from the
Eastmain Mine with very limited testing outside the existing resource area.
On behalf of the Board of Directors of Benz Mining Corp.
Xavier Braud, CEO
For more information please contact:
Paul Fowler
Head of Corporate Development (Canada)
Benz Mining Corp.
Telephone: +1 416 356 8165
Email:
Xavier Braud
CEO, Head of Corporate Development (Aus)
Benz Mining Corp.
Telephone +61 423 237 659
Email:
Forward-Looking Information:
Certain statements contained in this news release may constitute
"forward-looking information" as such term is used in applicable Canadian securities laws. Forward-
looking information is based on plans, expectations and estimates of management at the date the
information is provided and is subject to certain factors and assumptions, including, that the Company's
financial condition and development plans do not change as a result of unforeseen events and that the
Company obtains regulatory approval. Forward-looking information is subject to a variety of risks and
uncertainties and other factors that could cause plans, estimates and actual results to vary materially
from those projected in such forward-looking information. Factors that could cause the forward-looking
information in this news release to change or to be inaccurate include, but are not limited to, the risk that
any of the assumptions referred to prove not to be valid or reliable, that occurrences such as those
referred to above are realized and result in delays, or cessation in planned work, that the Company's
financial condition and development plans change, and delays in regulatory approval, as well as the
other risks and uncertainties applicable to the Company as set forth in the Company's continuous
disclosure filings filed under the Company's profile at
www.sedar.com
. The Company undertakes no
obligation to update these forward-looking statements, other than as required by applicable law.
NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS
THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS
RESPONSIBILITY FOR THE ACCURACY OR ADEQUACY OF THIS RELEASE.
Competent Person's Statements:
The information in this report that relates to Exploration Results is
based on and fairly represents information and supporting information compiled by Mr Xavier Braud,
who is a member of the Australian Institute of Geoscientists (AIG membership ID:6963). Mr Braud is a
consultant to the Company and has sufficient experience in the style of mineralization and type of
deposits under consideration and qualifies as a Competent Person as defined in the 2012 edition of the
"Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Mr
Braud holds securities in Benz Mining Corp and consents to the inclusion of all technical statements
based on his information in the form and context in which they appear.
The information in this announcement that relates to the Inferred Mineral Resource was first reported
under the JORC Code by the Company in its prospectus released to the ASX on 21 December 2020.
The Company confirms that it is not aware of any new information or data that materially affects the
information included in the original market announcement and confirms that all material assumptions and
technical parameters underpinning the estimate continue to apply and have not materially changed.
The
Company confirms that the form and context in which the Competent Person's findings are presented
have not been materially modified from the original market announcement
Appendix 1: Historical data (2010-11 assays data used in this release)
Table 1: Drillholes collar information
Hole_ID
Easting_X_Nad83Z18
Northing_Y_Nad83Z18
Elevation
TotDepth
Azimut_at_CLR
Dip_at_CLR
EM10-02
698873.9
5798667
483.912
444
224
-85.39
EM10-03
698822.8
5798639
484
387
246
-79.27
EM10-04
698868.9
5798671
483.87
423
257
-80.27
EM10-05
698835.5
5798569
484.636
330
223
-85.31
EM10-12
694522.2
5801514
505
309
218
-43.43
EM10-13
694522.2
5801514
505
342
220
-60.35
EM10-17
698705.9
5798655
484.72
315
209
-80.14
EM10-18
698943.1
5798733
483.905
480
205
-86.9
EM10-19
698942.5
5798733
483.944
402
239
-68.48
EM10-22
698986.7
5798759
484.389
450
238
-74.98
EM10-26
699084.1
5798450
481.509
279
217
-59.69
EM10-28
699082.5
5798341
480.931
249
213
-79.57
EM10-29
699081.9
5798340
480.903
237
220
-53.81
EM10-30
699138.9
5798265
486.53
246
199
-84.01
EM10-33
699297.1
5798420
480.231
354
216
-75.79
EM10-34
699296.9
5798419
480.174
366
227
-85.24
EM10-36
699229.4
5798287
482.929
279
211
-76.4
EM10-37
699205.7
5798177
485.568
216
217
-71.33
EM10-38
699016.4
5798038
489.257
195
218
-56.09
EM10-42
699425.9
5798261
481.801
351
210
-74.92
EM10-43
699472.3
5798216
482.014
351
208
-80.7
EM10-46
699961.3
5797734
487.645
330
209
-79.29
EM11-48
698933.5
5798922
489
507
213
-62
EM11-49
698933.5
5798922
488.9738
534
195
-84.6
EM11-50
698952.9
5798918
488
543
208
-60
EM11-51
698952.9
5798918
488
573
207
-53.1
EM11-52
698952.9
5798918
488
528
207
-45.1
EM11-53
698952.9
5798918
488
51
207
-43.4
EM11-54
698931
5798930
489
516
211
-44.9
EM11-58
699142.7
5798915
485
561
215
-71.5
EM11-59
699225
5798037
492
204
215
-69.9
EM11-60
699284
5798500
486
552
177
-83.4
EM11-61
699346.4
5798519
483
522
203
-83.9
EM11-62
699415.2
5798509
481
525
197
-78.5
EM11-63
699556.1
5798429
480
507
213.75
-74
EM11-64
699579
5798397
481
501
208
-73.4
EM11-65
699619.1
5798346
481
498
212
-73.4
EM11-66
699619.1
5798346
481
501
208
-78.8
EM11-67
699512
5798177
483
393
196
-84.9
EM11-69
700000.6
5797789
486
375
200
-84.5
EM11-70
700025
5797831
486
411
196
-84.5
EM11-71
700020.3
5797718
494
408
213
-70.2
EM11-72
700102
5797662
498
363
212
-68
EM11-74
700350
5797750
499
483
210
-75
Table 2: Assay data
S
ample#
Hole ID
Gold (g/t) method
Au-AA26
(fire assay, AAS Finish)
Gold (g/t) method
Au-AA26
(fire assay, AAS Finish)
duplicate sample
Gold (g/t) method
Au-SCR24
(Screen fire assay,
gravimetric finish
C152757
EM10-03
0.24
0.25
0.25
C152759
EM10-03
7.09
6.94
11.55
C152760
EM10-03
13.3
11
19.35
C152761
EM10-03
11.55
10.35
17.95
C152762
EM10-03
1.31
1.34
1.68
C152763
EM10-03
1.68
1.85
2.03
C152764
EM10-03
0.01
0.01
0.025
C152765
EM10-03
1.21
1.14
1.6
C152766
EM10-03
0.01
0.01
0.025
C176144
EM10-02
0.31
0.41
0.4
C176145
EM10-02
3.05
2.78
2.99
C176146
EM10-02
2.27
2.07
2.16
C176147
EM10-02
0.48
0.55
0.54
C176148
EM10-02
0.49
0.41
0.46
C176268
EM10-04
0.04
0.04
0.025
C176269
EM10-04
2.29
1.63
2.31
C176270
EM10-04
24.3
21.9
51.4
C176273
EM10-04
0.86
0.41
0.75
C176276
EM10-04
0.4
0.31
0.39
C176278
EM10-04
5.2
5.29
5.55
C176280
EM10-04
2.41
2.57
3.25
C176281
EM10-04
0.89
0.69
1.25
C176282
EM10-04
0.96
0.95
0.99
C176283
EM10-04
1.37
1.26
1.31
C176284
EM10-04
0.29
0.28
0.42
C176417
EM10-05
0.42
0.42
0.42
C176418
EM10-05
1
1.19
1.37
C176419
EM10-05
0.1
0.09
0.09
C176423
EM10-05
0.21
0.17
0.2
C176424
EM10-05
1.71
1.87
1.93
C176426
EM10-05
0.03
0.01
0.025
C178201
EM10-12
0.09
0.06
0.38
C178202
EM10-12
0.96
0.86
1.05
C178203
EM10-12
1.24
0.98
1.25
C178204
EM10-12
1.1
1.22
1.81
C178205
EM10-12
0.15
0.12
0.14
C178206
EM10-12
0.11
0.1
0.12
C178207
EM10-12
0.24
0.27
0.25
C178208
EM10-12
1.09
0.55
0.82
C178209
EM10-12
0.53
0.45
0.48
C178221
EM10-12
0.11
0.11
0.13
C178222
EM10-12
6.75
7.82
8.17
C178223
EM10-12
0.02
0.04
0.05
C178238
EM10-13
0.02
0.02
0.025
C178239
EM10-13
10.1
10.75
13.9
C178240
EM10-13
0.03
0.04
0.14
C178257
EM10-13
0.01
0.005
0.025
C178258
EM10-13
5.57
6.08
8.73
C178259
EM10-13
0.18
0.18
0.18
C178263
EM10-13
0.005
0.01
0.025
C178264
EM10-13
6.79
6.09
11.75
C178265
EM10-13
0.13
0.08
0.28
C178267
EM10-13
0.01
0.01
0.025
C178268
EM10-13
3.63
3.66
4.07
C178269
EM10-13
0.96
0.98
0.98
C178273
EM10-13
0.01
0.01
0.025
C178274
EM10-13
2.39
2.95
2.69
C178276
EM10-13
0.02
0.02
0.025
C179567
EM10-17
0.51
0.51
0.48
C179568
EM10-17
9.38
9.98
10.1
C179569
EM10-17
0.06
0.06
0.06
C179682
EM10-18
0.04
0.04
0.025
C179683
EM10-18
1.09
1.09
1.1
C179684
EM10-18
0.04
0.04
0.025
C179766
EM10-19
0.56
0.55
0.59
C179767
EM10-19
2.35
2.56
3.42
C179768
EM10-19
3.14
3.76
4.41
C179769
EM10-19
7.36
8
9.52
C179770
EM10-19
2.24
2.43
2.91
C179771
EM10-19
0.79
0.71
0.79
C179772
EM10-19
11.65
10.6
14.3
C179773
EM10-19
1.56
1.85
2.08
C179774
EM10-19
0.49
0.64
0.69
C179776
EM10-19
4.13
4.29
4.56
C179777
EM10-19
0.35
0.12
0.26
C179778
EM10-19
0.03
0.05
0.025
C179779
EM10-19
0.01
0.06
0.025
C179780
EM10-19
3.49
4.4
5.17
C179781
EM10-19
0.03
0.02
0.025
G0779169
EM10-03
0.01
0.005
0.025
G0779397
EM10-33
0.01
0.01
0.025
G0779398
EM10-33
1.02
1.16
2.07
G0779399
EM10-33
4.22
4.32
7.21
G0779872
EM10-18
0.02
0.01
0.025
G0779873
EM10-18
1.03
0.37
0.83
G0779874
EM10-18
0.04
0.03
0.025
H875044
EM10-22
0.67
0.6
0.75
H875045
EM10-22
3.93
4.22
6.94
H875046
EM10-22
0.05
0.02
0.025
H875047
EM10-22
0.05
0.99
0.56
H875048
EM10-22
0.005
0.28
1.52
H875049
EM10-22
0.47
0.21
0.52
H875153
EM10-26
0.01
0.01
0.025
H875154
EM10-26
1.3
1.55
1.87
H875155
EM10-26
0.06
0.06
0.08
H875171
EM10-26
0.59
0.58
0.72
H875172
EM10-26
1.09
0.97
1.11
H875173
EM10-26
0.005
0.005
0.025
H875183
EM10-28
0.09
0.1
0.09
H875184
EM10-28
8.29
10.7
13.9
H875185
EM10-28
0.05
0.16
0.23
H875186
EM10-28
1.16
0.72
1.19
H875187
EM10-28
2.24
2.3
2.95
H875188
EM10-28
0.67
0.78
0.9