Saturday, September 26, 2026
MiningNewsTerminal
Saturday, September 26, 2026 Admin

EDR.TO ·

Endeavour Silver Intersects High-Grade Silver-Gold Mineralization at the Guanacevi Mine in Durango, Mexico

Drill Results

Endeavour Silver Intersects High-Grade Silver-Gold Mineralization at the

Guanacevi Mine in Durango, Mexico

VANCOUVER, British Columbia, May 04, 2021 (GLOBE NEWSWIRE) -- Endeavour Silver Corp. (TSX: EDR, NYSE: EXK)

has intersected high grade silver-gold mineralization in its 2021 exploration drill program to expand the El Curso orebody at the

Guanacevi Mine in Durango State, Mexico.   The Company is currently producing from three orebodies at Guanacevi: Milache,

El Curso and SCS. Exploration drilling is ongoing at El Curso and SCS (view longitudinal section here).

Highlights from the latest drill results include:

• 3.27 grams per tonne (gpt) gold and 2,753 gpt silver for 2,982 gpt silver equivalent (AgEq at an 70:1 silver:gold

ratio) over a 4.1 metre (m) true width (87.0 oz per short ton (opT) AgEq over 13.5 feet (ft)), including 0.6 gpt gold and

18,752 gpt silver for 18,794 gpt AgEq over 0.3 m (548.2 opT AgEq over 1.0 ft) in drill hole UCM-48

• 4.29 gpt gold and 3,464 gpt silver for 3,764 gpt AgEq over a 2.6 m true width (109.8 opT AgEq over 8.5 feet (ft)),

including 25.7 gpt gold and 19,390 gpt silver for 21,189 gpt AgEq over 0.3 m (618.0 opT AgEq over 1.0 ft) in drill hole

UCM-50

Luis Castro, Vice President of Exploration, commented, “We continue to intersect excellent drill results as we step out from

the current margins of the El Curso orebody. There remains an additional 100 m to drill until we connect El Curso with the

Milache orebody to the west, and there is a similar gap to fill to connect El Curso with the Porvenir Cuatro orebody (previously

mined) to the east.”

“Ultimately, we anticipate that Porvenir Cuatro, El Curso and Milache will all connect to form one continuous orebody over a

1,500 m length by 400 m vertical extent. This would make it comparable to the original Porvenir Norte orebody which

supported production at Guanacevi for over 14 years. The future is looking bright for Guanacevi.”

Drill results are summarized in the following table:

Hole Structure From True width Au Ag AgEq

(m) (m) (gpt) (gpt) (gpt)

UCM-43 Santa Cruz 235.35 1.1 1.50 518 623

Including 236.85 0.2 3.82 1,069 1,336

UCM-44 Santa Cruz 251.15 1.6 1.31 530 622

Including 253.75 0.3 4.02 1,361 1,642

UCM-45 Santa Cruz 270.25 2.2 1.27 572 661

Including 272.55 0.2 5.60 2,304 2,696

UCM-46 Santa Cruz 139.00 1.0 2.43 39 209

Including 139.00 0.5 3.73 18 279

UCM-47 Santa Cruz 133.60 3.3 2.54 2,014 2,191

Including 136.10 0.5 4.23 4,223 4,519

UCM-48 Santa Cruz 151.70 4.1 3.27 2,753 2,981

Including 157.80 0.3 0.60 18,752 18,794

UCM-50 Santa Cruz 131.20 2.6 4.29 3,464 3,764

Including 133.70 0.3 25.66 19,390 21,186

UCM-51 Santa Cruz 148.00 1.4 0.48 235 269

Including 148.00 0.3 0.89 328 391

UCM-53 Santa Cruz 207.00 1.1 0.62 179 222

Including 208.00 0.2 3.47 952 1,195

UCM-55 Santa Cruz 230.25 3.0 1.09 420 496

Including 232.45 0.5 1.79 856 981

UCM-56 Santa Cruz 253.30 4.6 0.95 401 467

Including 257.45 0.4 2.12 887 1,036

UCM-57 Santa Cruz 239.25 2.9 0.50 275 310

Including 240.50 0.3 2.06 741 885

UCM-58 Santa Cruz 220.65 2.6 2.67 1,120 1,307

Including 222.00 0.4 8.09 2,936 3,502

UCM-59 Santa Cruz 304.85 2.0 1.76 1,180 1,303

Including 305.35 0.2 7.31 5,832 6,343

UCM-63 Santa Cruz 202.95 6.9 1.86 759 889

Including 210.70 0.3 9.56 4,292 4,961

UCM-64 Santa Cruz 226.60 1.3 0.58 210 250

Including 226.60 0.2 0.77 301 355

Silver equivalents are calculated at a ratio of 70:1 silver:gold. All widths are estimated true widths.

Qualified Person and QA/QC - Dale Mah, P.Geo., Vice President Corporate Development of Endeavour Silver, is the

Qualified Person who reviewed and approved the technical information contained in this news release. A Quality Control

sampling program of reference standards, blanks and duplicates has been instituted to monitor the integrity of all assay

results. All samples are split at the local field office and shipped to SGS Labs, where they are dried, crushed, split and 250

gram pulp samples are prepared for analysis. Gold is determined by fire assay with an atomic absorption (AAS) finish and

silver by aqua regia digestion with ICP finish, over-limits by fire assay and gravimetric finish.

About Endeavour Silver – Endeavour Silver Corp. is a mid-tier precious metals mining company that owns and operates

three high-grade, underground, silver-gold mines in Mexico. Endeavour is currently advancing the Terronera mine project

towards a development decision and exploring its portfolio of exploration and development projects in Mexico and Chile to

facilitate its goal to become a premier senior silver producer.  Our philosophy of corporate social integrity creates value for all

stakeholders.

SOURCE Endeavour Silver Corp.

Contact Information

Galina Meleger, Director Investor Relations

Toll free: (877) 685-9775

Tel: (604) 640-4804

Email: [email protected]

Website: www.edrsilver.com

Follow Endeavour Silver on Facebook, Twitter, Instagram and LinkedIn

Cautionary Note Regarding Forward-Looking Statements

This news release contains “forward-looking statements” within the meaning of the United States private securities litigation

reform act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation. Such

forward-looking statements and information herein include but are not limited to statements regarding future prospects of the

Company’s mines and projects. The Company does not intend to and does not assume any obligation to update such forward-

looking statements or information, other than as required by applicable law. 

Forward-looking statements or information involve known and unknown risks, uncertainties and other factors that may cause

the actual results, level of activity, production levels, performance or achievements to be materially different from those

expressed or implied by such statements. Such factors include but are not limited to the ultimate impact of the COVID 19

pandemic on operations and results, changes in production and costs guidance, national and local governments, legislation,

taxation, controls, regulations and political or economic developments in Canada and Mexico; financial risks due to precious

metals prices, operating or technical difficulties in mineral exploration, development and mining activities; risks and hazards of

mineral exploration, development and mining; the speculative nature of mineral exploration and development and risks in

obtaining necessary licenses and permits,

Forward-looking statements are based on assumptions management believes to be reasonable, including but not limited to:

the continued exploration and mining operations, no material adverse change in the market price of commodities, mining

operations will operate and the mining products will be completed in accordance with management’s expectations and achieve

their stated production outcomes, and such other assumptions and factors as set out herein. Although the Company has

attempted to identify important factors that could cause actual results to differ materially from those contained in forward-

looking statements or information, there may be other factors that cause results to be materially different from those

anticipated, described, estimated, assessed or intended. There can be no assurance that any forward-looking statements or

information will prove to be accurate as actual results and future events could differ materially from those anticipated in such

statements or information. Accordingly, readers should not place undue reliance on forward-looking statements or

information.