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Endeavour Silver Drilling Intersects High-Grade Silver-Gold Mineralization in Multiple Veins at the Terronera Project in Jalisco, Mexico

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Endeavour Silver Drilling Intersects High-Grade Silver-Gold Mineralization in Multiple Veins at the Terronera Project in Jalisco, Mexico






Endeavour Silver Corp. (TSX: EDR) (NYSE: EXK) announces that it has intercepted high grade silver-gold mineralization in a number of structures near the Terronera vein, highlighting the potential of the area. Four structures, the San Simon, Fresno, Pendencia and Lindero veins are located immediately to the southeast of the Terronera vein, and the Los Cuates vein is located approximately 10 kilometers to the northwest of the Terronera Project (view Terronera property map here).


The drill results reported today represent ongoing exploration work at the Terronera Project, with a plan to complete 16,000 metres of drilling by the end of the year. Key targets include extensions of the Terronera vein, which hosts most of the reserves in the Terronera Feasibility Study that is currently in progress, and more regional targets to grow resources in the district. As the Feasibility Study is nearing completion, all 2021 drill results will not be included as part of the development plan.


Highlights from each structure include:


  • San Simon: 9.78 gpt Au and 214 gpt Ag for 899 gpt AgEq over 1.35m ETW (TR13S-1)
  • Fresno: 6.05 gpt Au and 1,056 gpt Ag for 1,479 gpt AgEq over 2.88m ETW (TR13S-1)
  • Lindero: 2.63 gpt Au and 25 gpt Ag for 209 gpt AgEq over 1.08m ETW (TR7.5S-1)
  • Pendencia: 1.09 gpt Au and 445 gpt Ag for 521 gpt AgEq over 1.08m ETW (ZP-01)
  • Los Cuates: 1.36 gpt Au and 156 gpt Ag for 251 gpt AgEq over 1.21m ETW (LCT-03)
  • Los Cuates HW: 9.52 gpt Au and 148 gpt Ag for 815 gpt AgEq over 1.95m ETW (LCT-07)


Abbreviations include: gpt: grams per tonne; Au: gold; Ag: silver; ETW: estimated true width; m: metre; HW: hanging wall. Silver equivalents are calculated at a ratio of 70:1 silver:gold.


Luis Castro, Vice President of Exploration, commented, “These results support our view that the Terronera property continues to have significant potential to discover new mineralized zones and grow the mineral resources in multiple veins proximal to the already defined reserves and resources in the main Terronera vein. Over the past couple years, our drill programs have focused solely on delineating reserves and resources within the main Terronera vein to increase the level confidence for the Feasibility Study. During this time, surface exploration work was performed to develop and prepare additional targets in the region. These drill results verify that our detailed, methodical approach continues to be the right approach.”


Significant drill results are summarized in the following table. The Company has drilled 33 drill holes totalling 9,369 metres on the above regional targets over the past 8 months.


Hole Structure From True width Au Ag AgEq
(m) (m) (gpt) (gpt) (gpt)
TR9S-1 San Simon 219.95 1.12 0.32 170 192
TR11S-1 San Simon 185.10 2.14 3.97 73 351
TR12S-1 San Simon 143.35 5.59 2.17 177 329
Including 147.90 0.58 6.70 141 610
Fresno 179.95 1.41 2.20 54 208
Including 180.45 0.94 3.27 79 308
TR13S-1 San Simon 126.55 1.35 9.78 214 899
Including 127.35 0.65 12.70 254 1,143
Fresno 179.95 2.88 6.05 1,056 1,479
Including 183.00 0.33 4.40 2,210 2,518
TR13S-2 Fresno 157.35 1.98 3.38 347 584
Including 157.35 0.68 8.61 439 1,042
TR14S-3 Fresno 164.70 1.33 5.72 135 535
Including 164.70 0.53 7.78 176 721
TR14S-4 Fresno 206.00 1.39 2.04 66 209
Including 206.00 0.82 2.46 73 245
TR7.5S-1 Lindero 164.50 1.08 2.63 25 209
Including 165.00 0.24 4.01 27 308
ZP-01 Pendencia 241.70 1.84 0.33 215 239
Including 241.70 0.23 0.46 451 483
ZP-02 Pendencia 249.05 1.08 1.09 445 521
LCT-01 Los Cuates 121.75 1.20 0.30 132 153
Including 122.65 0.40 0.63 273 317
LCT-03 Los Cuates 209.55 1.21 1.36 156 251
LCT-07 Hw Los Cuates 322.15 1.95 9.52 148 815
Including 323.75 0.73 19.88 220 1,611
Los Cuates 337.45 1.07 2.81 54 250
Including 337.45 0.41 5.80 104 510


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.


Posted June 8, 2021

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