Rokmaster Reports Sensor-Based Sorting Gold Recovery of 99% at Revel Ridge
Rokmaster Reports Sensor-Based Sorting
Gold Recovery of 99% at Revel Ridge
VANCOUVER, BC
,
Sept. 5, 2023
/CNW/ - Rokmaster Resources Corp. (TSXV: RKR) (OTCQB:
RKMSF) (FSE: 1RR1) ("Rokmaster" or "the Company") is pleased to announce the receipt of very
positive results from sorting test work on representative samples from the Revel Ridge Project
("Revel Ridge" or "the Project") Main Deformation Zone ("MDZ").
John Mirko
, President and CEO of Rokmaster stated, "Rokmaster continues to improve recoveries
and processing potential of all target metals. Achieving this excellent sorting result of recovering 98-
99% of all the target metals to 50% of the screened sorter feed by being able to reject waste rock,
sheds light on the ease of identifying the contacts between the mineralisation and waste types in this
deposit and the potential to decrease the footprint of both the process plant and downstream tails
facilities, while moving towards our ESG targets by being good stewards of energy consumption for
processing."
The test program was designed and supervised by
Stacy Freudigmann
, P.Eng., F.Aus.IMM. of
Canenco Consulting Corp. ("Canenco") and conducted at the Steinert US Inc. ("Steinert") facility in
Walton, KY
, USA, with sample preparation and assaying undertaken at Base Metallurgical
Laboratories Ltd. ("BaseMet"), out of
Kamloops, BC
.
The sorting objective was to remove the majority of the dilution waste rock types that would be
present in mine output, in an effort to significantly upgrade the mineralization feed grade to the
process plant. Two representative batches of bulk material from the MDZ, (Batch 1 and 2 of
approximately 529kg and 739kg respectively), were prepped, compiled and submitted in consultation
with the project mining engineers and geologists.
For this sorting program, a cascading test protocol utilizing the X-Ray Transmission ("XRT") sensor
was used. These steps would concentrate the densest fraction, and then the subsequent waste
fraction from each pass would be tested with a lower threshold. This "cascade mode" allows for an
understanding of the sorting behaviour under various sorting thresholds. Once the sorting algorithm
was developed, the two batches of bulk material were fed into the sorter's feed hopper and
conveyor using a bobcat and after each separation stage, the product/waste streams were manually
and visually examined to identify the extent, if any, of misplaced particles.
Figure 1 – Average Sorting Test Results
Average Batch 1&2
Calculated Data
Sorting Stage
Cumulative
Mass Pull
to Product
(%)
Au
Grade
(g/t)
Au
Recovery
(%)
Ag
Grade
(g/t)
Ag
Recovery
(%)
Pb
Grade
(%)
Pb
Recovery
(%)
Zn
Grade
(%)
Zn
Recovery
(%)
Stage 1
38 %
14.5
96.2
110.0
95.5
3.6
94.3
5.6
96.0
Stage 2
40 %
14.0
97.9
106.4
97.4
3.5
96.1
5.4
97.3
Stage 3
42 %
13.5
98.6
102.4
98.1
3.4
96.6
5.2
97.7
Stage 4
50 %
11.6
99.2
88.8
99.0
2.9
97.4
4.5
98.6
Stage 5
60 %
9.5
99.6
72.4
99.5
2.4
98.1
3.7
99.2
Overall (Head)
100 %
5.7
100.0
43.8
100.0
1.5
100.0
2.2
100.0
Figure 1 – Average Sorting Test Results (CNW Group/Rokmaster Resources Corp.)
*Note: Some numbers may not add due to rounding.
Source: Canenco 2023
The Revel Ridge MDZ mineralisation exhibits excellent potential to be sorted using the XRT sorting
sensor.
The results indicate that, based on the third separation threshold, over 98% of gold and
silver can be concentrated in around approximately 42% of the mass, resulting in over 120%
upgrade in the corresponding feed grades. At the fourth stage, where 50% of the feed was
rejected, over 99% of the gold and silver was recovered to the product with approximately a
2x grade upgrade for all minerals of value.
The testing methodology undertaken provides a reliable tool to identify the best sorting conditions
and thresholds and overall, these tests should satisfy a PEA-level of study. It should be noted that
the current results were obtained in a controlled laboratory environment and may be optimistic
compared to operational sorting scenarios. Operational results will vary with the changing feed
conditions from the mine, variability in the deposit itself, actual dilution amounts and numerous other
variables. In addition, the nature of cascading test work approach can be biased towards higher
recoveries as particles get multiple chances to be sorted, although this doesn't appear to be a major
factor in the MDZ mineralization, it should be taken into consideration.
Further test work was recommended to support ongoing engineering studies.
The concentrated material from these tests can be used for downstream metallurgical testing to
estimate the potential effects on reagent consumption, lead, zinc, gold and silver recoveries, as
well as any potential complications with the pre-concentration of impurities in the mineralisation.
It was also recommended that additional confirmatory sorting tests (1-2 tonnes) to
be performed, with introduction of limited variability sample testing.
The technical information in this news release has been prepared in accordance with Canadian
regulatory requirements has been reviewed and approved by Mr.
Stacy Freudigmann
, P.Eng.
F.AusIMM., who is a Qualified Person as set out in National Instrument 43-101 and independent of
Rokmaster.
On Behalf of the Board of Directors of
Rokmaster Resources Corp.
John Mirko
,
President & Chief Executive Officer.
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term in defined in the
policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this
press release.
About Rokmaster
Rokmaster's flagship Revel Ridge Project is host to a high-grade gold and polymetallic orogenic
sulphide deposit which has been the subject of a PEA Technical Report dated
December 8, 2020
,
and an Updated Mineral Resource Estimate
1
on the Revel Ridge Property with an effective date of
June 6, 2023
. The 2023 Mineral Resource Estimate remains open in all directions, and is the basis
of the ongoing update to the PEA.
Measured & Indicated ("M&I"):
1.53 million
gold equivalent ("AuEq") Measured & Indicated
("M&I") ounces contained within 7.16 million tonnes with an average grade of 6.63 g/t AuEq.
Inferred (Inf):
1.49 million
AuEq ounces contained within 7.56 million tonnes at an average
grade of 6.11 g/t AuEq.
Footnote 1. Stone et al. 2023. Technical Report and Updated Mineral Resource Estimate of the Revel Ridge Polymetallic Property. NI 43-101 Technical Report dated July 28,
2023.
CAUTIONARY NOTE REGARDING FORWARD LOOKING STATEMENTS: This news release may
contain forward-looking information within the meaning of applicable securities laws ("forward-
looking statements"). Forward-looking statements are statements that are not historical facts and
are generally, but not always, identified by the words "expects," "plans," "anticipates," "believes,"
"intends," "estimates," 'projects," "potential" and similar expressions, or that events or conditions
"will," "would," "may," "could" or "should" occur. These forward-looking statements are subject to a
variety of risks and uncertainties which could cause actual events or results to differ materially from
those reflected in the forward-looking statements, including, without limitation: risks related to
fluctuations in metal prices; uncertainties related to raising sufficient financing to fund the planned
work in a timely manner and on acceptable terms; changes in planned work resulting from weather,
logistical, technical or other factors; the possibility that results of work will not fulfill expectations and
realize the perceived potential of the Company's properties; risk of accidents, equipment
breakdowns and labour disputes or other unanticipated difficulties or interruptions; the possibility of
cost overruns or unanticipated expenses in the work program; the risk of environmental
contamination or damage resulting from Rokmaster's operations and other risks and uncertainties.
Any forward-looking statement speaks only as of the date it is made and, except as may be
required by applicable securities laws, the Company disclaims any intent or obligation to update any
forward-looking statement, whether as a result of new information, future events or results or
otherwise.
SOURCE
Rokmaster Resources Corp.
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For further information:
Please contact Mr. John Mirko, President & CEO of Rokmaster
Resources Corp., [email protected], Ph. 1-604-290-4647 or by website: www.rokmaster.com;
For shareholder information please contact: Mike Kordysz, [email protected], Ph. +1 (604)
319-3171
CO: Rokmaster Resources Corp.
CNW 05:00e 05-SEP-23