Azimut Reports Positive Initial Metallurgical Results From Elmer Gold Recoveries up to 94% Symbol: AZM.TSX Venture
Azimut Reports Positive Initial Metallurgical
Results From Elmer
Gold Recoveries up to 94%
Symbol: AZM.TSX Venture
LONGUEUIL, QC
,
Nov. 22, 2021
/CNW Telbec/ -
Azimut Exploration Inc.
("Azimut" or the
"Company") (TSXV: AZM) is pleased to report excellent preliminary metallurgical tests from two
representative samples from the Patwon Gold Zone on the Company's
100% owned Elmer
Property
(the "Property") in the
James Bay
region of
Quebec
.
The test program conducted by SGS Canada Inc. included chemical and metallurgical
characterization, comminution, and metallurgical testing. The objective was to obtain baseline
grindability and recovery data for a gravity separation and gravity tailings cyanidation flowsheet.
Azimut has undertaken a 20,000-metre core drilling program to expand the Patwon Zone and
prepare for a maiden NI 43-101 compliant resource estimate (
see press release of October
18, 2021
). The Patwon mineralized body presents a remarkably thick and continuous geometry
currently defined over a strike length of 500 metres and to a minimum depth of 450 metres with an
estimated true width averaging 35 metres. The core zone of this envelope, defined thus far by 25
drill hole intercepts, displays an average true width of 45 metres at an average grade of
2.86 g/t Au. The true width of the core zone can reach up to 82 metres (
see press release of
November 4, 2021
).
HIGHLIGHTS
The preliminary metallurgical tests for the Patwon Gold Zone indicate non-refractory
free-milling gold mineralization that is potentially easily recoverable by a combination of
gravity circuit and conventional cyanide leaching.
Combined gold recoveries
for
gravity and cyanidation
reached
94%
and
93%
for two
samples grading 3.92 g/t Au (sample MET-1) and 2.95 g/t Au (MET-2), respectively.
Gravity tests
resulted in a
gold recovery of 27%
fo MET-1 and
37%
for MET-2. These
excellent recoveries indicate the potential to include a gravity circuit in a process flowsheet.
Whole-gold extractions from
cyanide leaching
range from
88% to 93%
for MET-1 and from
91% to 95%
for MET-2. Gold recovery rates are very fast for the first 2 hours. The particle size
in the range studied (between 50 and 81 µm) does not appear to have a significant impact on
the speed of gold extraction.
Very low graphitic carbon values
(below the assay detection limit of 0.05%) suggest that a
carbon-in-pulp process might be preferable to carbon-in-leach for downstream gold recovery.
Comminution tests
(ball mill grindability) returned average Bond Work Index (BWI) values that
categorize MET-1 as
medium
and MET-2 as
moderately soft
.
More testwork will be undertaken to improve the 24- to 48-hour gold recoveries and optimize the
leach residence time. Improvements are expected with these tests. Cyanide and lime consumptions
are reasonable but could likely be reduced with further optimization.
Testwork Summary
SGS Canada Inc. conducted the tests in
Quebec City
using two representative composite drill core
samples corresponding to the following holes:
ELM20-031: 13.3 kg
(sample from 172.5 m to 188.6 m along core)
ELM20-51A: 17.2 kg
(sample from 198.15 m to 220.5 m along core)
Each composite was stage-crushed to P
100
of 6 mesh (3.35 mm), blended, and submitted for a
Bond ball mill grindability test (closing screen size of 150 µm). The remaining material from each
composite was stage-crushed to P
100
passing 10 mesh (2 mm), blended, and riffled into charges for
metallurgical testwork.
Semiquantitative ICP Scan Analysis
Representative 75-micron pulverized samples were submitted for an ICP scan analysis. The two
samples (MET-1, MET-2) were found to contain mostly silica (71.2%, 61.0%) and sulphur (0.92%,
1.41%) with negligible graphitic carbon (<0.05%).
Screened Metallics Protocol
The gold and silver head grades for the two composites were determined by screened metallics
tests conducted at 106 µm. The gold head grades obtained are 3.92 g/t Au for MET-1 and 2.95 g/t
Au for MET-2. The silver content is <0.5 g/t for both samples.
Mineralogy
Based on the QEMSCAN results, pyrite is the major sulphide mineral. Pyrite is well liberated (>90%)
and the remaining pyrite is mainly associated with silicates. The gangue is mainly composed of
quartz, feldspar, chlorite and mica.
Comminution
The hardness of the mineralized samples is measured through grindability testing. This step is very
important as it might affect the mining process plant design. Comminution testing performed in this
program included a single Bond ball mill grindability test on each sample to provide initial baseline
information on the Patwon Zone. The grindability test was completed at a closing screen size of
150 µm. Referring to the SGS database, the grindability of the two samples can be categorized as
medium for MET-1 with a BWI of 13.8 kWh/t, and moderately soft for MET-2with a BWI of 13.3
kWh/t.
Metallurgical Testing: Gravity Separation
The two samples were submitted to standard gravity separation for the recovery of free gold. The
tests were performed at a target grind size P
80
of 125 microns. The gravity separation was
performed using a Knelson concentrator and a Mozley mineral separator. Gold recovery reached
27% for MET-1, yielding a gold concentrate grade of 532 g/t, and 37% for MET-2, for a grade of
643 g/t.
Sample
Conc.
wt.
%
Conc.
Au g/t
Conc.
Ag g/t
Recovery
Au %
Recovery
Ag %
Tailing
Au g/t
Tailing
Ag g/t
Head Grade
Au cal. g/t
Head
Grade
Au direct g/t
MET-1
0.22%
532
83.6
27%
27%
3.23
< 0.5
4.41
3.92
MET-2
0.14%
643
81.5
37%
19%
1.58
0.5
2.50
2.95
Metallurgical Testing: Cyanidation Testwork
Cyanidation tests were performed at different grind sizes between 50 and 81 microns. The gravity
tailings produced by the gravity separation tests were also submitted for cyanidation. Results are
presented in the table below:
Sample
ID
CN
Test #
Size
P
80
µm
Reagent
Addition
Reagent
Consumption
Extraction
Au
48 h
%
Residue
Au
g/t
Head Grade
Au
Recovery
Gravity
Au
%
Gravity + CN
Au
%
NaCN
kg/t
CaO
kg/t
NaCN
kg/t
CaO
kg/t
Calc.
g/t
Direct
g/t
MET-1
CN-1
81
1.00
1.82
0.69
1.56
93
0.27
3.69
3.92
CN-2
72
1.10
1.82
0.73
1.42
91
0.47
4.53
CN-3
59
1.17
1.98
0.79
1.69
88
0.51
3.80
MET-1 Tail
CN-4
81
1.04
1.33
0.62
1.17
91
0.27
2.84
3.23
27
94
MET-2
CN-5
76
0.92
1.64
0.56
1.42
91
0.32
3.23
2.95
CN-6
65
0.97
1.68
0.58
1.49
95
0.15
2.94
CN-7
50
1.00
1.61
0.65
1.41
94
0.23
3.54
MET-2 Tail
CN-8
62
0.94
1.67
0.57
1.50
89
0.28
2.29
1.58
37
93
Summary of Cyanidation Test Results
The results from the cyanidation tests from the whole mineralized samples, ground to different
particle sizes show gold extractions ranging from 88% to 93% for MET-1 (tests CN-1 to CN-3) and
from 91% to 95% for MET-2 (tests CN-5 to CN-7). These results show that the particle size in the
range studied (between 50 and 81 µm) does not have a significant impact on gold extraction.
The final gold extractions for the gravity tailing cyanidation tests on MET-1 and MET-2 yielded 91%
and 89%, respectively. Based on the high amount of gold recovered by gravity (>25%),
incorporating gravity separation into the flowsheet would reduce the size and cost of a plant.
The cyanidation kinetic tests indicate very fast gold leaching rates. Between 63% and 73% of the
gold was leached from MET-1 after only 2 hours and between 58% and 68% from MET-2 during the
same time.
The Elmer Property
The Elmer Property comprises 515 claims covering 271.3 km
2
over a 35-kilometre strike length. The
Property is 285 kilometres north of
Matagami
, 60 kilometres east of the village of
Eastmain
, and
5 kilometres west of the paved James Bay Road, a major all-season highway. The region benefits
from quality infrastructure, including significant road access, a hydroelectric power grid and airports.
Dr.
Jean-Marc Lulin
, P.Geo., prepared this press release as Azimut's Qualified Person under NI 43–
101.
Simon Houle
, P.Geo., Chief Geologist, has reviewed the content of this press release. Results
for the metallurgical test program reported in this press release were reviewed and approved by
Guy Chevalier
, P.Eng., Senior Metallurgist for SGS and Qualified Person under NI 43-101.
About Azimut
Azimut is a mineral exploration company whose core business centres on target generation and
partnership development. The Company is actively advancing the Patwon gold discovery on its
100%-owned flagship Elmer Property in the
James Bay
region.
The Company uses a pioneering approach to big data analytics (the proprietary
AZtechMine
TM
expert system), enhanced by extensive exploration know-how. Azimut maintains
rigorous financial discipline, a strong balance sheet, and has 81.7 million shares issued and
outstanding. Azimut's competitive edge against exploration risk is based on systematic regional-
scale data analysis and multiple concurrently active projects.
Cautionary note regarding forward-looking statements
This press release contains forward-looking statements, which reflect the Company's current
expectations regarding future events related to the metallurgical testing at the Elmer Property. To
the extent that any statements in this press release contain information that is not historical, the
statements are essentially forward-looking and are often identified by words such as "anticipate",
"expect", "estimate", "intend", "project", "plan", "potential", "suggest" and "believe". The forward-
looking statements involve risks, uncertainties, and other factors that could cause actual results to
differ materially from those expressed or implied by such forward-looking statements. There are
many factors that could cause such differences, particularly volatility and sensitivity to market
metal prices, impact of change in foreign currency exchange rates and interest rates, imprecision
in reserve estimates, recoveries of gold and other metals, environmental risks including increased
regulatory burdens, unexpected geological conditions, adverse mining conditions, community and
non-governmental organization actions, changes in government regulations and policies, including
laws and policies, global outbreaks of infectious diseases, including COVID-19, and failure to
obtain necessary permits and approvals from government authorities, as well as other
development and operating risks. Although the Company believes that the assumptions inherent in
the forward-looking statements are reasonable, undue reliance should not be placed on these
statements, which only apply as of the date of this document. The Company disclaims any
intention or obligation to update or revise any forward-looking statement, whether as a result of
new information, future events or otherwise, other than as required to do so by applicable
securities laws. The reader is directed to carefully review the detailed risk discussion in our most
recent Annual Report filed on SEDAR for a fuller understanding of the risks and uncertainties that
affect the Company's business.
Neither 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 adequacy or accuracy of this
release
.
SOURCE
Azimut Exploration Inc.
View original content:
http://www.newswire.ca/en/releases/archive/November2021/22/c7864.html
%SEDAR: 00003284E
For further information:
Jean-Marc Lulin, President and CEO, Tel.: (450) 646-3015 - Fax: (450)
646-3045, [email protected], www.azimut-exploration.com
CO: Azimut Exploration Inc.
CNW 06:30e 22-NOV-21