Nevada KING Demonstrates Average GOLD Cyanide Solubility of 86.7% IN Initial Testing at Atlanta GOLD MINE, Battle Mountain Trend, Nevada
NEVADA KING DEMONSTRATES AVERAGE
GOLD CYANIDE SOLUBILITY OF 86.7% IN
INITIAL TESTING AT ATLANTA GOLD MINE,
BATTLE MOUNTAIN TREND, NEVADA
VANCOUVER, BC
,
July 5, 2022
/CNW/ -
Nevada King Gold Corp.
(TSXV: NKG) (OTCQX:
NKGFF) ("
Nevada King
" or the "
Company
") is pleased to announce very positive results from its
Stage 1 cyanide solubility testing program at the Company's 100% owned Atlanta Gold Mine,
located 264km northeast of
Las Vegas
at the southern end of the Battle Mountain Trend. The
project has historically returned significant gold grades but was long considered to have limited
amenability to cyanide extraction. A total of 986 mineralized samples were selected from 54 RC
holes covering the extent of the 2021 drilling. All samples were submitted to American Assay Lab
(AAL) for cyanide solubility and ICP multi-element analyses.
Highlights
Gold cyanide solubility demonstrated a weighted average of 86.7%
across 986 samples.
Samples analysed were widely distributed, with over half coming from outside the
historical Atlanta Mine open pit, extending up to
560m
north of the pit (see Figure 1).
Cyanide solubility was consistently high in all holes, with 69% of the samples exceeding 80% Au
cyanide solubility (see Table 1) while only 2% of the samples returned less than 50% cyanide
solubility.
Aside from gold grade, no systematic influence on cyanide solubility was observed with respect
to depth, gold grade, rock type, alteration type, degree of silicification, degree of fracturing,
clay content, or collar location. Gold solubility is slightly higher in material exceeding 1.50g/t.
Samples were for the most part thoroughly oxidized and ranged in depth from the surface down
to
197m
.
Designed by the Company's metallurgical consultant,
Gary Simmons
(
announced
April 12, 2022
), this Stage 1 program used 986 pulp samples exceeding 0.100 g/t Au averaging 1.16 g/t with
values ranging up to 18.2 g/t. The holes tested are located east and north of the Gustavson
2020 pit-constrained resource zone along a
1,000m
stretch of the N-S trending Atlanta Mine
Fault zone.
Exploration Manager
Cal Herron
stated: "As seen in Table 2, average gold cyanide solubility across
54 RC holes is remarkably consistent and averages 86.7%. These results clearly demonstrate that
gold mineralization at
Atlanta
is not refractory due to sulfides or organic carbon or encapsulated by
silica at fine particle size. Consequently,
Nevada King's
2022 resource definition and expansion
drilling program will include additional shallow RC drilling to test lower grade zones outside of the
Gustavson resource zone in areas previously considered waste. The cyanide solubility tests also
indicate higher-grade mineralization has higher cyanide solubility than the low-grade material.
Referring to Table 3, a noticeable difference in gold solubilities is seen in the fire assay data at 1.50
g/t. Samples exceeding 1.50 g/t Au comprise 21.7% of the entire test sample population, averaging
3.88 g/t and 87.7% gold solubility. In contrast, samples running less than 1.50 g/t returned gold
solubilities in the 83% range.
Our Stage 2 metallurgical testing program will therefore include conventional crush and High
Pressure Grinding Roll (HPGR) comminution column leach tests on low-grade and higher-grade
mineralization along the Atlanta Mine Fault zone to test the potential for heap leaching portions of the
resource. Based on such encouraging gold cyanide solubility data, the Company is also expanding
its cyanide testing program to include pulps from mineralized historical drill holes located west of the
existing pit to determine gold solubilities within the Gustavson 2020 resource zone. Under the
direction of
Gary Simmons
, bulk sampling within and around the pit will soon commence, together
with a PQ core drilling program designed to provide samples for bottle roll and column leach
testing."
Metallurgical Consultant Gary Simmons stated: "The gold cyanide solubilities reported by AAL
demonstrate the consistent oxidized nature of the mineralized gold system at the Atlanta Mine. The
high cyanide solubilities lead to the conclusion that cyanide leach milling and conventional crush
and/or HPGR heap leach process flow sheet options are potentially viable and will be tested on PQ
metallurgical core samples planned for 2022. Additional ICP sulfur (S) analysis by AAL has shown
higher than anticipated S content. Upon further review, it was determined that most of the elevated
ICP sulfur assays are associated with the sulfate minerals, barite and gypsum and not sulfides.
Additional testing by AAL has already been designed to determine the most appropriate method to
remove the sulfur contained in barite and gypsum sulfates to obtain a more representative total
sulfur analysis using ICP."
Figure 1.
Location of Nevada King’s 2021 drill holes analyzed for cyanide-soluble gold. Blue lines
denote strands of Atlanta Mine Fault zone. (CNW Group/Nevada King Gold Corp.)
Range in Average Au Solubility (%)
Number of Samples
% of Total Samples (986)
From
To
>100
^
39
4
90
100
273
28
80
90
365
37
70
80
192
19
50
70
94
10
<50
23
2
Table 1. Summary of gold cyanide solubility tests on 986 drill hole intervals from
Nevada
King's
2021 program.
^
Due to natural variation in the distribution of gold in the samples, certain
samples demonstrate higher than 100% gold solubility. In such cases, the split that was analyzed
via fire assay may have fewer gold particles in it than the split that was used for the CN solubility
analysis.
Hole ID
Number of Samples
Average Fire Au (ppm)
Average CN Au (ppm)
Average Au Solubility (%)
AT21-032A
17
0.446
0.404
91
AT21-002
28
0.477
0.431
90
AT21-015
16
0.402
0.361
90
AT21-025
6
0.114
0.103
90
AT21-043
15
0.811
0.733
90
AT21-003
19
2.992
2.665
89
AT21-018A
32
0.727
0.642
88
AT21-019
3
0.191
0.163
86
AT21-041
6
0.379
0.325
86
AT21-042
24
0.639
0.550
86
AT21-018B
3
0.156
0.133
85
AT21-016
12
0.245
0.206
84
AT21-005
13
0.230
0.192
83
AT21-041B
22
1.233
1.020
83
AT21-042A
32
0.588
0.490
83
AT21-007
24
0.646
0.528
82
AT21-011
11
0.674
0.554
82
AT21-032
3
0.113
0.093
82
AT21-038A
25
0.634
0.518
82
AT21-001
23
0.789
0.637
81
AT21-004
29
0.591
0.476
81
AT21-009A
14
0.247
0.200
81
AT21-024
2
0.130
0.105
81
AT21-038
23
0.553
0.449
81
AT21-041A
21
1.593
1.285
81
AT21-010
13
1.326
1.062
80
AT21-030A
27
0.456
0.364
80
AT21-018
4
0.161
0.128
79
AT21-014
16
0.357
0.276
77
AT21-013
14
0.591
0.404
68
AT21-006
16
0.598
0.364
61
AT21-020
2
0.126
0.065
52
AT21-043A
22
0.870
0.795
91
AT21-044
19
0.390
0.278
71
AT21-045
28
0.994
0.874
88
AT21-046
18
0.902
0.829
92
AT21-047
7
0.564
0.490
87
AT21-048
23
0.268
0.230
86
AT21-050
20
1.391
1.132
81
AT21-050A
25
0.973
0.730
75
AT21-051
18
0.195
0.168
86
AT21-052
12
0.225
0.204
91
AT21-053
14
0.320
0.291
91
AT21-060
3
0.228
0.197
86
AT21-061
27
0.527
0.441
84
AT21-062
39
4.941
4.474
91
AT21-063
31
3.449
3.001
87
AT21-064
44
3.210
2.928
91
AT21-065
37
2.031
1.832
90
AT21-066
38
2.491
2.226
89
AT21-069
23
0.555
0.424
76
AT21-070
7
0.200
0.169
84
AT21-071
1
0.151
0.120
79
AT21-072
15
0.371
0.290
78
Total Weighted Average Au Recovery
86.7
Table 2. Averaged gold solubilities with cyanide for 986 sample intervals from 54 RC holes
drilled at
Atlanta
by
Nevada King
in 2021
Gold Grade Range g/t
Number of Samples
% of Total Samples
Average Au by Fire Assay
(ppm)
Average Au Solubility (%)
>4.00
62
6.3
7.28
88.7
3.00-4.00
40
4.1
3.49
86.0
2.00-3.00
60
6.1
2.45
88.1
1.50-2.00
51
5.2
1.74
87.2
1.00-1.50
74
7.5
1.21
83.8
0.50-1.00
160
16.2
0.71
82.3
0.20-0.50
299
30.3
0.32
82.7
0.10-0.20
240
24.3
0.14
82.7
Table 3. Gold solubility with respect to gold grade
Qualified Person
The scientific and technical information in this news release has been reviewed and approved by
Calvin R. Herron
, P.Geo., who is a Qualified Person as defined by National Instrument 43-101 ("
NI
43-101
").
About Nevada King Gold Corp.
Nevada King
is the third largest mineral claim holder in the
State of Nevada
, behind
Nevada Gold
Mines
(Barrick/Newmont) and
Kinross Gold
. Starting in 2016 through to the present day the
Company has staked large project areas hosting significant historical exploration work along the
Battle Mountain
trend located close to current or former producing gold mines. These project areas
were initially targeted based on their potential for hosting multi-million ounce gold deposits and were
subsequently staked following a detailed geological evaluation. District-scale projects in
Nevada
King's
portfolio include (1) the 100% owned Atlanta Mine, located 100km southeast of
Ely
, (2) the
Lewis and Horse Mountain-Mill Creek projects, both located between
Nevada Gold Mines'
large
Phoenix
and Pipeline mines, and (3) the Iron Point project, located 35km east of
Winnemucca,
Nevada
.
The Atlanta Mine is a historical gold-silver producer with a NI 43-101 compliant pit-constrained
resource of 460,000 oz Au in the measured and indicated category (
11.0M
tonnes at 1.3 g/t) plus an
inferred resource of 142,000 oz Au (
5.3M
tonnes at 0.83 g/t). See the NI 43-101 Technical Report
on Resources titled "Atlanta Property,
Lincoln County, NV
" with an effective date of
October 6,
2020
, and a report date of
December 22, 2020
, as prepared by Gustavson Associates and filed
under the Company's profile on SEDAR (
www.sedar.com
).
NI 43-101 Mineral Resources at the Atlanta Mine
Resource
Category
Tonnes
(000's)
Au Grade
(ppm)
Contained Au Oz
(000's)
Ag Grade
(ppm)
Contained Ag Oz
(000's)
Measured
4,130
1.51
200
14.0
1,860
Indicated
6,910
1.17
260
10.6
2,360
Measured + Indicated
11,000
1.30
460
11.9
4,220
Inferred
5,310
0.83
142
7.3
1,240
Please see the Company's website at
www.nevadaking.ca
.
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 adequacy or accuracy of
this release.
Cautionary Statements Regarding Forward Looking Information
This news release contains certain "forward-looking information" and "forward-looking statements"
(collectively "forward-looking statements") within the meaning of applicable securities legislation.
All statements, other than statements of historical fact, included herein, without limitation,
statements relating the future operations and activities of
Nevada King
, are forward-looking
statements. Forward-looking statements are frequently, but not always, identified by words such as
"expects", "anticipates", "believes", "intends", "estimates", "potential", "possible", and similar
expressions, or statements that events, conditions, or results "will", "may", "could", or" should"
occur or be achieved. Forward-looking statements in this news release relate to, among other
things, further metallurgical testing and exploration plans, including resource definition and
expansion drilling, and the Company's ability to potentially expand mineral resources and the
impact thereon. There can be no assurance that such statements will prove to be accurate, and
actual results and future events could differ materially from those anticipated in such statements.
Forward-looking statements reflect the beliefs, opinions and projections on the date the statements
are made and are based upon a number of assumptions and estimates that, while considered
reasonable by
Nevada King
, are inherently subject to significant business, economic, competitive,
political and social uncertainties and contingencies. Many factors, both known and unknown, could
cause actual results, performance or achievements to be materially different from the results,
performance or achievements that are or may be expressed or implied by such forward-looking
statements and the parties have made assumptions and estimates based on or related to many of
these factors. Such factors include, without limitation, the ability to complete proposed exploration
work given the global COVID-19 pandemic, the results of exploration, continued availability of
capital, and changes in general economic, market and business conditions. Readers should not
place undue reliance on the forward-looking statements and information contained in this news
release concerning these items.
Nevada King
does not assume any obligation to update the
forward-looking statements of beliefs, opinions, projections, or other factors, should they change,
except as required by applicable securities laws.
SOURCE
Nevada King Gold Corp.
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For further information:
Collin Kettell at [email protected] or (301) 744-8744.
CO: Nevada King Gold Corp.
CNW 07:30e 05-JUL-22