Lindero is an open pit, heap leach gold project with a completed feasibility study that has been granted all environmental and other major permits necessary for development. In September 2017, the Company announced a positive construction decision for Lindero with commissioning expected in the second quarter of 2019 (see Fortuna news release dated September 21, 2017). Lindero has been designed as an 18,750 tpd1 owner operated open pit mine with a pit life of 13 years based on existing reserves. Crushed ore will be placed on a leach pad with the pregnant solution pumped to SART2 and ADR3 plants prior to electrowining and refining where gold will be poured to doré bars.
Tonnes per day
Adsorption, Desorption and Recovery
The Lindero Project is located in the Argentinian puna at an elevation of approximately 3,500 to 4,000 meters, 260 kilometers due west of Salta City at latitude 25° 04' 56" S and longitude 67° 46' 47" W. Drive time from Salta City to Lindero is approximately 7 to 7.5 hours over a road distance of 420 kilometers. Access to the project is via National Route 51, which passes through the towns of San Antonio de Los Cobres and Olacapato, and by Provincial Route 27, which passes through the towns of Pocitos and Tolar Grande. Tolar Grande is the nearest town to the project, located 75 kilometers to the northeast.
Geology and Mineralization
The Lindero deposit is a gold-rich porphyry system hosted within a series of diorite to monzonite porphyritic stocks that intrude coarse-grained Ordovician granites and Early Tertiary red bed sandstones. Mineralization forms an inward plunging semi-circular shape approximately 600 meters in diameter and extends to a drill tested depth of 600 meters. Gold-copper mineralization shows a strong relationship to lithology, K-feldspar alteration, and stockwork veining.
13 Year Reserve Life
Feasibility Study - Life of Mine Highlights
Mine life1 (years)
Annual ore placed in leach pad (Mt)
Strip ratio (waste to ore)
Head grade (g/t)
Gold recovered to doré (Moz)
Average annual gold recovered to doré2 (koz)
Peak annual gold recovered to doré (koz)
AISC3 ($/oz Au)
Initial capital ($ M)
Sustaining capital ($ M)
Base Case Economics
Gold price ($)
Exchange rate (ARS4:USD)
After-tax NPV5 @ 5% ($ M)
After-tax IRR6 (%)
Payback period7 (years)
Includes 20 months of heap rinsing of gold inventory
Average over years 1 – 13. Does not include gold from heap rinsing.
All-In Sustaining Cash Cost
Net Present Value; considers initial capital in one single annual period; excludes High-Pressure-Grinding-Roller (HPGR) acquired upon the acquisition of Goldrock Mines Corp.
Considers initial capital in one single annual period; excludes High-Pressure-Grinding-Roller (HPGR) acquired upon the acquisition of Goldrock Mines Corp.
Mineral Reserves and Resources are as defined by CIM Definition Standards on Mineral Resources and Mineral Reserves
Mineral Resources are exclusive of Mineral Reserves
Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability
There are no known legal, political, environmental, or other risks that could materially affect potential development of the Mineral Resources or Mineral Reserves at Lindero
Mineral Resources and Mineral Reserves for Lindero are reported as of September 9, 2017
Mineral Reserves for Lindero are reported based on open pit mining within designed pit shells based on variable gold cut-off grades and gold recoveries by metallurgical type. Met type 1 cut-off 0.27 g/t Au, recovery 75.4%; Met type 2 cut-off 0.26 g/t Au, recovery 78.2%; Met type 3 cut-off 0.26 g/t Au, recovery 78.5%; and Met type 4 cut-off 0.30 g/t Au, recovery 68.5%. The cut-off grades and pit designs are considered appropriate for long term gold prices of $1,250/oz
Lindero Mineral Resources are reported within a conceptual pit shell above a 0.2 g/t Au cut-off grade using a long-term gold price of $1,250/oz, mining costs at $1.67 per tonne of material, with total processing and process G&A costs of $7.84 per tonne of ore and an average process recovery of 75%. The refinery costs net of pay factor were estimated to be $6.90 per ounce of gold. Slope angles are based on 3 sectors (39°, 42°, and 47°) consistent with geotechnical consultant recommendations
Eric Chapman, P.Geo. (APEGBC #36328) is the Qualified Person for resources and Edwin Gutierrez (SME Registered Member #4119110RM) is the Qualified Person for reserves, both being employees of Fortuna Silver Mines Inc.