EDM Announces Positive Results of the Dense Media Separation Study
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NEWS RELEASE AUGUST 11, 2025
EDM ANNOUNCES POSITIVE RESULTS OF THE DENSE MEDIA SEPARATION STUDY
Halifax, Nova Scotia, August 11, 2025 – EDM Resources Inc. (TSX-V: EDM; FSE: P3Z) (“EDM” or the “Company”) is
pleased to announce the final results of the Dense Media Separation Study on all zinc and lead composite samples from its
Scotia Mine. The final tests indicate that it may be possible to pre-concentrate crushed run-of-mine material using Dense
Media Separation (“DMS”) prior to flotation, thereby potentially reducing the overall cost of mineral processing at the
Scotia Mine.
Highlights of the DMS pilot plant operation
• Increase in grades by 18.4% for zinc and 33.5% for lead.
• Recoveries of 88.4% of zinc and 99.7% of lead.
• Potential reduction to processing costs per pound of zinc produced due to increase in processing head grade.
• Reduction in waste mineral processing of up to 25%.
• Expected to have an overall positive impact on the project economics.
“EDM is very excited by the results of the final HLS and DMS pilot plant test work, which indicated an 18% overall increase
in zinc feed grades and a 34% increase in lead feed grades. Applied conceptually to the 2021 PFS processing schedule, a
full-scale DMS plant could increase the total amount of zinc and lead concentrate produced at the Scotia Mine as typically
a DMS pilot plant’s results are indicative of a full scale DMS process.” said, Mr. Mark Haywood, President & CEO. “In
addition, more efficient processing of the Scotia Mine ores would potentially enable more ore to be processed in the flotation
and dewatering circuits, thereby decreasing the overall processing costs per tonne which could increase the overall NPV
of the project,” he added.
HLS Testwork Details
A Dense Media Separation plant utilizes a gravity separation process that relies on the differences in density between
mineralized rock and non-mineralized rock, and uses a non-toxic slurry of heavy media and water to effect a separation.
HLS testing is a bench-scale process that is used to simulate the full-scale DMS process. It utilizes a bath of organic heavy
liquid at various densities to incrementally split out the heavier mineralization (which sinks in the liquid) and the lighter
waste (which floats to the top of the liquid).
On an industrial scale, a DMS plant at the Scotia Mine would be designed to process a crushed run of mine stream, and to
significantly reduce the amount of sub -economic (waste) material that would otherwise be processed through the Scotia
Mine’s mill. As a relatively simple, environmentally friendly and cost -efficient metallurgical process, a DMS plant can
significantly reduce the overall processing costs at the Scotia Mine which would also allow a lowering of cut-off grade and
access to otherwise uneconomic areas of the deposit.
The HLS tests were performed on material from two 10 -kilogram samples that were collected from the high -grade
mineralized zones of the Scotia Mine. One sample was 100% crushed to 12.7mm (1/2”) in preparation for “Test T1”. On
completion of Test T1, the second sample was then crushed to 6.3mm (1/4”) for “Test T2”. The minus 0.85mm size fraction
was removed from both samples prior to HLS testing.
Additional HLS tests were also performed on material from two 10-kilogram samples that were collected from the blended-
grade mineralized zones of the Scotia Mine. A first sample was 100% crushed to 6. 3mm (1/4”) in preparation for “ Test
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T3”. On completion of Test T3, the second sample was then crushed to 3.3mm for “ Test T4”. The minus 0.85mm size
fraction was removed from both samples prior to HLS testing. The head grades of the high-grade sample are shown as
follows in Table 1, with the results of all HLS Tests shown in Tables 2, 3, 4 and 5 below:
Table 1 – Sample Head Grades
Table 2: HLS Test T1 Results
Table 3: HLS Test T2 Results
Table 4: HLS Test T3 Results
Head Grade Zn% Pb%
High-Grade 18.4 36.8
Product Weight
(%) Zn Pb Zn Pb
HLS 3.20 SG Sink 73.2 25.6 48.4 96.3 99.1
HLS 3.10 SG Sink 74.1 25.4 47.8 96.8 99.2
HLS 3.00 SG Sink 76.5 24.8 46.4 97.3 99.4
HLS 2.90 SG Sink 77.5 24.5 45.9 97.8 99.5
HLS 2.85 SG Sink 78.9 24.2 45.1 98.2 99.6
HLS 2.80 SG Sink 81.9 23.4 43.5 98.6 99.7
HLS 2.75 SG Sink 83.7 23.0 42.6 98.9 99.7
HLS 2.75 SG Float 16.3 1.3 0.6 1.1 0.3
Head (Calc.) 100.0 19.5 35.7 100.0 100.0
Assays (%) Distribution (%)
Product Weight
(%) Zn Pb Zn Pb
HLS 3.20 SG Sink 74.1 25.0 44.6 95.6 98.8
HLS 3.10 SG Sink 76.1 24.6 43.5 96.8 99.1
HLS 3.00 SG Sink 80.2 23.6 41.4 97.6 99.4
HLS 2.90 SG Sink 81.2 23.4 41.1 98.2 99.6
HLS 2.85 SG Sink 82.9 23.1 40.2 98.7 99.7
HLS 2.80 SG Sink 85.4 22.5 39.1 99.0 99.8
HLS 2.75 SG Sink 93.6 20.7 35.7 99.7 99.9
HLS 2.75 SG Float 6.4 0.9 0.4 0.3 0.1
Head (Calc.) 100.0 19.4 33.5 100.0 100.0
Assays (%) Distribution (%)
Product Density Weight
(kg/l) (%) Zn Pb Zn Pb
HLS 2.85 SG Sink 2.85 41.1 5.7 0.7 63.6 94.1
HLS 2.80 SG Sink 2.80 90.1 3.9 0.3 95.2 98.9
HLS 2.75 SG Sink 2.75 99.2 3.7 0.3 99.6 99.8
HLS 2.70 SG Sink 2.70 99.7 3.7 0.3 99.8 99.8
HLS 2.65 SG Sink 2.65 99.9 3.7 0.3 99.8 99.9
HLS 2.60 SG Sink 2.60 100.0 3.7 0.3 100.0 100.0
HLS 2.75 SG Float 2.75 0.0 1.3 0.1 0.0 0.0
Head (Calc.) 100.0 3.7 0.3 100.0 100.0
Assays (%) Distribution (%)
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Table 5: HLS Test T4 Results
SGS selected optimal SGs for HLS recoveries of zinc and lead, as well as the mass recovered.
For HLS Test T1: At an optimal SG of 3.00, 76.5% of mass was retained, along with 97.3% of zinc and 99.4% of lead
For HLS Test T2: At an optimal SG of 3.00, 80.2% of mass was retained, along with 97.6% of zinc and 99.4% of lead
For HLS Test T3: At an optimal SG of 2.80, 90.1% of mass was retained, along with 95.2% of zinc and 98.9% of lead
For HLS Test T4: At an optimal SG of 2.80, 82.5% of mass was retained, along with 93.5% of zinc and 99.3% of lead
DMS Details and Results
The DMS feed from the blended-grade samples was stage-crushed to 100% passing 3.3 mm and split into two equal charges,
after removal of minus 0.85 mm fines . The first DMS operation (PP -04) was carried out at a SG cut -point of 2.83. The
second DMS operation (PP-05) was then carried out at a lower SG cut-point of 2.81 with the second DMS charge as feed.
The third DMS operation (PP-06) was carried out at a lower SG cut-point of 2.77 with PP-05 floats as the feed.
The combined sinks from PP -05 and PP -06 attained the target mass split. The combined PP -05 and PP -06 operation
simulated one DMS operation at a SG cut-point of 2.77.
Table 6: Overall Stage Balance for DMS Plant Operations at SG 2.77 (including Fines)
Based on the results of the HLS tests and DMS operations, the following conclusions were summarized:
1. Based on the HLS test results at two crush sizes of 6.4 mm and 3.3 mm, 3.3 mm was selected as the crush size of
DMS operation.
2. Three DMS pilot plant operations were required to achieve the target mass recovery to the sinks. The optimal SG
cut point was found to be 2.77.
3. The DMS stage mass recovery to the sinks was 57.8%. The stage lead and zinc recoveries were 99.0% and 73.9%,
respectively. The lead and zinc grades were 0.37% Pb and 3.98% Zn, respectively.
4. The mass recovery to the flotation feed (sinks + fines) was 74.7%. The lead and zinc recoveries were 99.7% and
Product Density Weight
(kg/l) (%) Zn Pb Zn Pb
HLS 2.90 SG Sink 2.90 7.2 13.2 3.5 28.9 82.8
HLS 2.85 SG Sink 2.85 21.4 8.3 1.4 53.6 95.3
HLS 2.83 SG Sink 2.83 56.7 4.7 0.5 80.1 97.6
HLS 2.80 SG Sink 2.80 82.5 3.8 0.4 93.5 99.3
HLS 2.75 SG Sink 2.75 99.6 3.3 0.3 99.9 99.9
HLS 2.75 SG Float 2.75 0.4 0.8 0.1 0.1 0.1
Head (Calc.) 100.0 3.3 0.3 100.0 100.0
Assays (%) Distribution (%)
Product Density Weight
(kg/l) (%) Zn Pb Zn Pb
DMS 2.77 Sinks +2.77 34.6 3.98 0.37 32.9 29.1
DMS 2.77 Floats -2.77 25.3 1.92 0.01 11.6 0.3
DMS Fines 40.1 5.82 0.77 55.5 70.6
Head (Calc.) 100.0 4.19 0.44 100.0 100.0
Flotation Feed (sinks+fines) 74.7 4.96 0.58 88.4 99.7
Grade Increase % 18.4 33.5
Assays (%) Distribution (%)
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88.4%, respectively. The grades obtained were 0.58% Pb and 4.96% Zn. This represented increases of 33.5% and
18.4% in the respective grades over the calculated head grade s. Overall, the results obtained from the DMS
operation were comparable to the HLS tests.
About Dense Media Separation (DMS)
DMS is a relatively simple and inexpensive method of pre-concentrating mineralization before it enters the Grinding and
Flotation Circuits at the Scotia Mine. It has been used extensively worldwide on many types of minerals, including projects
similar to the Scotia Mine. After crushing, the material is processed through cyclones typically using a ferro-silicon media
that will allow non -mineralized rock to "float" and be collected as waste, while mineralized material will "sink" and be
directed to the grinding circuit as higher graded mill feed. EDM already has a 2,700 tonnes per day mill concentrator on site
at the Scotia Mine, so a DMS plant could be added prior to the Flotation Circuit in the existing processing building.
Mr. Curtis Mohns, P.Eng., Senior Metallurgist for SGS Canada Inc. and a Qualified Person as defined under NI43-101, has
approved the technical information contained in this news release related to the HLS and DMS test work.
Other Corporate Matters
A total of 2,800,000 stock options have been granted to certain directors, officers, employees and consultants at a strike
price of C$0.09. All options expire on August 8, 2030, and are subject to the Company’s Stock Option Plan and the policies
of the TSX Venture Exchange (“TSX.V”).
About EDM Resources Inc.
EDM is a Canadian exploration and mining company that has full ownership of the Scotia Mine and related facilities near
Halifax, Nova Scotia. Through its wholly owned subsidiary, EDM also holds several prospective exploration licenses near
its Scotia Mine and in the surrounding regions of Nova Scotia.
The Company’s common shares are traded on the TSX Venture Exchange under the symbol “EDM” and the
Frankfurt Exchange under the symbol “P3Z”. For more information, please contact:
Mark Haywood President & Chief Executive Officer
Arnab De Chief Financial Officer
Manish Grigo Corporate Development
Telephone +1 (902) 482 4481
Facsimile +1 (902) 422 2388
Email & Web [email protected] & www.EDMresources.com
The Company’s corporate filings and technical reports can be viewed on the Company’s SEDARPLUS profile at
www.sedarplus.ca. Further information on EDM is also available on Facebook at
http://www.facebook.com/EDMresources.inc, Twitter at http://www.twitter.com/EDMresources, LinkedIn at
http://www.linkedin.com/company/EDMresources and Youtube at
https://youtube.com/@edmresources?si=Bvyighil3mSoOKnD
CAUTIONARY STATEMENTS
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 news release.
This news release includes certain forward-looking statements which are not comprised of historical facts. Forward-
looking statements include estimates and statements that describe the Company’s future plans, objectives or goals, including
words to the effect that the Company or management expects a stated condition or result to occur. Forward-looking
statements may be identified by such terms as “believes”, “anticipates”, “expects”, “estimates”, “may”, “should”, “could”,
“would”, “will”, or “plan”. Since forward-looking statements are based on assumptions and address future events
and conditions, by their very nature they involve inherent risks and uncertainties. Although these statements are based
on information currently available to the Company, the Company provides no assurance that actual results will meet
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management’s expectations. Risks, uncertainties, and other factors involved with forward-looking information could
cause actual events, results, performance, prospects, and opportunities to differ materially from those expressed or implied
by such forward- looking information. Forward-looking information in this news release includes, but is not limited to,
the Company’s objectives, goals or future plans, statements, potential mineralization, exploration and development
results, the estimation of mineral resources, exploration and mine development plans, timing of the commencement of
operations and estimates of market conditions. There can be no assurance that forward-looking statements will prove to
be accurate and actual results and future events could differ materially from those anticipated in such statements.
Important factors that could cause actual results to differ materially from EDM’s expectations include, among others, the
degree to which mineral resource and reserve estimates are reflective of actual mineral resources and reserves, the
degree to which factors are present which would make a mineral deposit commercially viable, the price of zinc, lead and
gypsum, uncertainties relating to availability and costs of financing needed in the future, changes in equity markets,
risks related to international operations, the actual results of current exploration activities, delays in the development
of projects, conclusions of economic evaluations and changes in project parameters as plans continue to be refined as well
as future prices of metals, ability to predict or counteract potential impact of COVID-19 coronavirus on factors relevant
to the Company’s business, as well as those factors discussed in the section entitled “Risk Factors” in EDM’s
management’s discussion and analysis of the Company's annual financial statements for the period ended December 31,
2024. Although EDM has attempted to identify important factors that could cause actual results to differ materially, there
may be other factors that cause results to be not as anticipated, estimated or intended. There can be no assurance that such
statements will prove to be accurate as actual results and future events could differ materially from those anticipated in
such statements. Accordingly, readers should not place undue reliance on forward-looking statements.