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posted on
Aug 24, 2013 12:45AM
Building the Foundations of a Leading Silver Miner
Fortuna Silver drills 8.2 m of 487 g/t Ag at San Jose
2013-08-15 07:24 ET - News Release
Mr. Jorge Ganoza reports
FORTUNA INTERCEPTS 487 G/T AG AND 4 G/T AU OVER 8.2 M AT TRINIDAD NORTH DISCOVERY, SAN JOSE MINE, MEXICO
Fortuna Silver Mines Inc. has released results for 12 additional surface drill holes at the Trinidad North high-grade silver-gold discovery at the San Jose mine in Mexico. With the exception of drill hole SJO-304, the reported drill holes are generally positioned to define the approximate limits of the Trinidad North ore shoot. The ore shoot remains open to depth and to the north with drilling from underground stations projected to start in early September.
TRINIDAD NORTH DRILLING HIGHLIGHTS From To Interval Estimated Ag Au AgEq Hole Id (m) (m) (m) true width (m) (g/t) (g/t) (g/t) SJO-299 526.00 534.00 8.00 4.7 178 1.26 245 SJO-303A 462.95 470.20 7.25 5.5 258 1.45 335 SJO-304 543.40 560.95 17.55 10.4 326 2.06 436 580.00 593.80 13.80 8.2 487 4.00 700 SJO-308 503.55 511.10 7.55 4.3 226 1.28 294 SJO-315 445.85 451.00 5.15 3.3 399 2.10 511 SJO-321 533.75 537.75 4.00 1.5 850 4.48 1,089
Dr. Thomas I. Vehrs, vice-president of exploration, commented: "The latest drill results continue to confirm the importance of the Trinidad North discovery. The Trinidad North ore shoot is located proximal to the area of operations at San Jose allowing for development of the zone in 2014 and initiation of production in early 2015. Silver equivalent grades range from 200 g/t to over 2,300 g/t over estimated true vein widths ranging from two metres to over 19 metres." Dr. Vehrs continued: "Underground access is currently in development at the 1,300-metre level to allow for continued exploration of the ore shoot to the north and to depths below 1,000 m amsl. The first underground drill station is projected to be ready by the end of August with underground drilling scheduled to begin in early September."
Fortuna Silver news releases of Feb. 4, 2013, April 22, 2013, and May 22, 2013, contain the results of previously released drill holes from the Trinidad North zone.
Quality assurance and quality control
Following detailed geological and geotechnical logging, drill core samples are split on site by diamond sawing. One-half of the core is submitted to the ALS Chemex Laboratory in Guadalajara, Mexico. The remaining half core is retained on site for verification and reference purposes. Following preparation, the samples are assayed for gold and silver by standard fire assay methods and for silver and base metals by ICP and atomic absorption methods utilizing aqua regia digestion. The quality assurance/quality control program includes the blind insertion of certified reference standards and assay blanks at a frequency of approximately one per 15 normal samples as well as the inclusion of duplicate samples for verification of sampling and assay precision levels.
Qualified person
Dr. Thomas I. Vehrs, PhD, vice-president of exploration, is a qualified person for Fortuna Silver Mines Inc. as defined by National Instrument 43-101. Dr. Vehrs is a founding registered member of the Society for Mining, Metallurgy and Exploration Inc. (SME registered member No. 3323430RM) and is responsible for ensuring that the information contained in this news release is an accurate summary of the original reports and data provided to or developed by Fortuna Silver Mines.
FULL DRILLING RESULTS Inter- From To val Estimated Ag Au Pb Zn Cu AgEq Hole Id (m) (m) (m) true width (m) (g/t) (g/t) (ppm) (ppm) (ppm) (g/t) SJO-299 513.00 514.00 1.00 0.6 620 4.17 542 860 73 843 526.00 534.00 8.00 4.7 178 1.26 738 1,246 136 245 536.80 544.00 7.20 4.2 102 0.74 1,703 3,408 181 141 SJO-303A 415.00 417.00 2.00 1.5 304 3.10 62 125 45 469 455.60 459.20 3.60 2.7 168 1.10 215 466 24 227 462.95 470.20 7.25 5.5 258 1.45 365 680 46 335 SJO-304 535.85 540.70 4.85 2.9 381 1.99 829 1,872 127 487 543.40 560.95 17.55 10.4 326 2.06 510 1,235 102 436 565.00 566.50 1.50 0.9 294 1.32 295 791 142 364 572.70 575.00 2.30 1.4 249 1.86 1,823 4,127 512 348 580.00 593.80 13.80 8.2 487 4.00 2,121 3,811 401 700 SJO-308 475.65 477.25 1.60 0.9 655 3.66 318 680 60 850 499.50 501.70 2.20 1.3 421 2.81 204 377 44 571 503.55 511.10 7.55 4.3 226 1.28 154 376 38 294 550.50 552.10 1.60 0.9 491 4.74 1,946 4,696 919 744 SJO-310 286.90 288.00 1.10 0.6 152 0.68 157 184 10 189 329.00 332.00 3.00 1.5 66 0.38 166 332 30 86 SJO-311 149.15 150.00 0.85 0.5 183 6.11 7 60 60 509 429.50 431.00 1.50 0.9 825 3.74 504 939 47 1,025 SJO-313 351.00 351.50 0.50 0.3 187 0.89 109 342 33 234 353.00 356.75 3.75 2.4 341 1.73 312 635 35 433 SJO-315 445.85 451.00 5.15 3.3 399 2.10 327 567 46 511 SJO-316 347.30 351.00 3.70 1.4 325 1.63 232 262 19 412 357.00 361.00 4.00 1.5 149 0.89 175 466 20 196 415.50 417.55 2.05 0.8 602 3.19 1,377 2,263 59 772 435.50 437.00 1.50 0.6 204 1.08 397 969 21 262 445.90 452.20 6.30 2.4 88 0.51 213 465 23 115 SJO-320 No significant mineralized intervals SJO-321 492.20 500.45 8.25 3.1 88 0.43 900 1,596 104 111 502.10 508.80 6.70 2.5 130 0.68 792 1,931 104 166 533.75 537.75 4.00 1.5 850 4.48 1,076 2,353 78 1,089 SJO-325A 568.10 569.60 1.50 0.7 137 0.74 761 1,593 61 176 573.70 575.55 1.85 0.9 181 0.78 884 2,368 34 223 606.05 607.00 0.95 0.4 111 1.48 13,870 27,820 1,373 190 *AgEq values calculated at gold-to-silver ratio of 53.37 based on metal prices as of Dec. 31, 2012 (Au: $1,572.19 (U.S.); Ag: $29.46 (U.S.)), metallurgical recoveries of 89 per cent for both Au and Ag, and a lower cut-off of 70 g/t AgEq.