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Endeavour Silver Intersects New High-Grade Gold-Silver Mineralization on the El Curso Property at the Guanacevi Mine in Durango, Mexico

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Endeavour Silver Intersects New High-Grade Gold-Silver Mineralization on the El Curso Property at the Guanacevi Mine in Durango, Mexico






Endeavour Silver Corp. (NYSE: EXK) (TSX: EDR) announces that exploration drilling through Q1, 2020 intersected new high-grade gold-silver mineralization in the Santa Cruz vein on the El Curso property at the Guanacevi mine in Durango, Mexico.  A total of 18 holes were drilled, 12 of which hit high grades over minable widths (view longitudinal section here).


Drilling highlights of 12 core holes include the following intersections:


  • 1,085 gpt silver and 3.25 grams per tonne (gpt) gold over 10.0 meters (m) true width in hole UCM-27 (1,410 gpt or 41.1 oz per ton (opT) silver equivalents (AgEq) over 32.8 feet (ft) at a 100:1 silver:gold ratio)
  • 762 gpt silver and 1.87 gpt gold over 5.1 m true width in hole UCM-26 (949 gpt or 27.7 opT AgEq over 16.7 ft)
  • 986 gpt silver and 1.43 gpt gold over a 4.8 m true width in hole UCM-25 (1,129 gpt or 32.9 opT AgEq over 15.7 ft)


Drill holes UCM-11 to 15 continue to delineate the northwest extension of the original P4 orebody onto the El Curso property.  This P4 extension now measures 200 m long by 300 m deep, still open at depth.  Endeavour is currently mining this P4 extension as well as the Milache and SCS orebodies.


Drill holes UCM-19 to 28 have discovered a new mineralized zone to the west of P4 extension, half-way towards the Milache orebody.  This new mineralized zone now measures 250 m long by 150 m deep, still open along strike and at depth.  Drilling stopped at the end of March due to the COVID-19 pandemic and is expected to recommence in June.


Bradford Cooke, Endeavour Director and CEO, commented, “Last year at Guanacevi, we were successful in outlining new resources on the El Curso property, and we commenced mining there in late Q3, 2019.  This year, we continue to discover new resources in the Santa Cruz vein on El Curso which should add to our mine life at Guanacevi.”


Drilling results are summarized in the following table:



Hole Structure From True Width Au Ag AgEq
(m) (m) (gpt) (gpt) (gpt)
UCM-11 Santa Cruz 223.00 3.5 1.25 425 550
Including 223.65 0.3 6.75 2,278 2,953
UCM-12 Santa Cruz 190.90 3.3 2.12 812 1,024
Including 195.50 0.2 7.39 3,275 4,014
UCM-14 Santa Cruz 99.50 4.4 1.33 355 489
Including 101.50 0.5 3.02 806 1,108
UCM-15 Santa Cruz 103.20 1.2 0.90 452 542
Including 103.90 0.4 2.48 1,155 1,403
UCM-19 Santa Cruz 271.75 1.0 2.38 798 1,036
Including 272.55 0.5 2.52 848 1,100
UCM-21 Santa Cruz 330.55 5.7 1.23 421 544
Including 335.75 0.3 5.52 1,483 2,035
UCM-23 Santa Cruz 307.90 2.8 1.78 570 748
Including 308.05 0.3 5.80 2,422 3,002
UCM-24 Santa Cruz 344.25 3.6 3.15 614 929
Including 350.00 0.5 15.16 2,264 3,780
UCM-25 Santa Cruz 339.40 4.8 1.43 986 1,129
Including 347.55 0.5 7.30 7,451 8,181
UCM-26 Santa Cruz 311.55 5.1 1.87 762 948
Including 315.35 0.6 3.50 2,026 2,376
UCM-27 Santa Cruz Composite 322.80 10.0 3.25 1,085 1,410
Including 335.65 0.5 14.88 5,500 6,988
UCM-28 Santa Cruz Vein 364.05 5.1 1.15 389 504
Including 372.65 0.3 1.31 986 1,117


Silver equivalents are calculated at a ratio of 100:1 silver: gold. All widths are estimated true widths.


Qualified Person and QA/QC 


Godfrey Walton, M.Sc., P.Geo., Endeavour President and COO, is the Qualified Person who reviewed and approved this news release and supervised the drilling programs in Mexico. A Quality Control sampling program of reference standards, blanks and duplicates is used 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 50 gram pulp samples are prepared for analysis. Gold is determined by fire assay with an atomic absorption (AA) finish and silver by aqua regia digestion and 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.


Posted June 3, 2020

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