Overview
Stage | Pre-Feasibility |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Processing |
- Sulfuric acid (reagent)
- Heap leach
- SART
- Merrill–Crowe
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
|
Mine Life | 14 years (as of Jan 1, 2019) |
Latest News | Filo Mining Announces Closing of C$41.7 Million Financing July 30, 2020 |
Source:
p. 20
Company | Interest | Ownership |
Filo Mining Corp.
|
100 %
|
Indirect
|
Filo del Sol Exploración S.A.
(operator)
|
100 %
|
Direct
|
The Filo del Sol property is comprised of mineral titles in both Chile and Argentina. Those in Argentina are controlled by Filo del Sol Exploración S.A. and are referred to as the Filo del Sol Property, those in Chile are controlled by Frontera Chile Limitada and are referred to as the Tamberías Property. Both Filo del Sol Exploración S.A. and Frontera Chile Limitada are whollyowned subsidiaries of Filo Mining Corp.
Summary:
Mineralization in the Filo del Sol area shows affinities with both porphyry copper-gold-molybdenum and high- sulphidation gold-silver epithermal systems. The deposit defined by the mineral resource is best classified as epithermal in the north (Filo del Sol) and copper-gold porphyry plus epithermal in the south (Tamberias). The mineralized system in its entirety is thought to represent a porphyry – epithermal system, with multiple intrusive and breccia centres, and so combines aspects of both these deposit types. The Flamenco fault is an important structure that separates the exposed porphyry Au-Cu system in the south at Cerro Vicuña - Tamberias, from the relatively down-dropped block to the north with the preserved high-sulphidation system at Filo del Sol.
The Filo del Sol deposit encompasses both the Filo del Sol high-sulphidation epithermal system and part of the Tamberias area which is interpreted as a fault-offset part of the same hydrothermal system. The deposit occurs within a porphyry Cu-Au and high-sulphidation epithermal Cu-Au-Ag system that formed during rapid uplift and erosion in the Middle Miocene. Porphyry intrusions and associated Cu-Au mineralization are associated with an early epithermal system have been eroded and overprinted by at least one subsequent stage of porphyry intrusion and epithermal system development. The Filo del Sol system is largely associated with this second, later part of the progressive development of the system.
The Filo del Sol property is characterized by a large hydrothermal alteration zone extending for approximately 18km2, from south of Cerro Vicuña to the Maranceles and Potro areas in the north. The alteration types and zonation across the area allow for a series of porphyry intrusive centres with associated higher-level high-sulphidation epithermal systems that have been structurally-offset and exposed to different depths. Alteration in the south around Cerro Vicuña-Tamberias includes both remnant potassic porphyry-style alteration, with overprinting epithermal alteration; while Filo del Sol up to Maranceles presents high-sulphidation epithermal mineralogy. The system at Ventanas has not yet been extensively evaluated but appears to also host both porphyry and epithermal features.
In the immediate Filo del Sol deposit area, alteration is consistent with a high-sulphidation epithermal system. The deposit occurs within a lithocap domain formed to the south of one of the main up-flow zones mapped through alteration mineralogy. A shallowly west- and north-dipping quartz-alunite alteration domain is controlled, at least in-part, by the basal contact of the conglomeratic rocks. Below the quartz-alunite zone, alteration changes rapidly to argillic assemblages that include illite and downwards into montmorillonite. Immediately overlying the quartz-alunite zone are alteration domains resulting from fluid interactions at a receding paleo-water surface, including a domain of massive silicification, followed upwards generally by residual silica with several perched lenses of opaline silica, and capped by steam-heated alteration formed in the vadose zone above the progressively descending paleo-water surface.
Summary:
The Filo del Sol deposit is a large near surface, bulk mineable deposit that is well suited for extraction by conventional open pit methods. Ore and waste will be drilled, blasted and loaded by diesel hydraulic face shovels and front-end loaders from 12-meter benches. Haul trucks will haul the material to the ore crusher, a short-term stockpile, or the waste dump as required. Autonomous haulage was incorporated to take advantage of the technology’s proven productivity improvements and operating cost savings. The open pit will have a mine life of 14 years, including pre-stripping, with a life of mine strip ratio of 1.5:1. A maximum mining rate of approximately 65 Mt per year (including waste) is required to provide the nominal 60,000 tonnes per day of ore to the process facility. A total of 259 Mt of ore is
expected to be processed over the life of the mine.
Processing
- Sulfuric acid (reagent)
- Heap leach
- SART
- Merrill–Crowe
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
Flow Sheet:
Summary:
The process plant for the Filo del Sol project is designed to treat 60,000 tpd of ore through a sequential heap leach process, to produce copper cathodes and gold/silver doré.
Ore will be trucked from the mine and either stockpiled or direct tipped into the primary crusher. The ore will be further crushed through a closed-circuit secondary crushing system to a stockpile.
Crushed ore will be processed at an on/off heap leach pad where the copper will be leached in acid and then recovered from the leach solution by solvent extraction and electrowinning to produce LME grade copper cathodes. Metal leaching is expected to span over 13 years.
Once the copper is leached, the ore will be rinsed, neutralized and removed from the on/off leach pad by a bucket wheel reclaimer. The material will then be agglomerated using cement, and subsequently stacked on a permanent heap leach pad where gold and silver will be leached in a cyanide solution. Gold and silver ........

Recoveries & Grades:
Commodity | Parameter | Avg. LOM |
Copper
|
Recovery Rate, %
| ......  |
Copper
|
Head Grade, %
| 0.39 |
Gold
|
Recovery Rate, %
| ......  |
Gold
|
Head Grade, g/t
| 0.33 |
Silver
|
Recovery Rate, %
| ......  |
Silver
|
Head Grade, g/t
| 15 |
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Reserves at June 11, 2018:
Category | Tonnage | Commodity | Grade | Contained Metal |
Probable
|
259.1 Mt
|
Copper
|
0.39 %
|
2,226 M lbs
|
Probable
|
259.1 Mt
|
Gold
|
0.33 g/t
|
2,764 koz
|
Probable
|
259.1 Mt
|
Silver
|
15.1 g/t
|
126,028 koz
|
Indicated
|
425.1 Mt
|
Copper
|
0.33 %
|
3,107 M lbs
|
Indicated
|
425.1 Mt
|
Gold
|
0.32 g/t
|
4,436 koz
|
Indicated
|
425.1 Mt
|
Silver
|
10.7 g/t
|
146,738 koz
|
Inferred
|
175.1 Mt
|
Copper
|
0.27 %
|
1,054 M lbs
|
Inferred
|
175.1 Mt
|
Gold
|
0.33 g/t
|
1,834 koz
|
Inferred
|
175.1 Mt
|
Silver
|
6.2 g/t
|
34,811 koz
|
Corporate Filings & Presentations:
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News:
News | Date |
Filo Mining Announces Closing of C$41.7 Million Financing
|
July 30, 2020
|
Filo Mining Corp. Announces Increase to Previously Announced Concurrent Private Placement
|
July 8, 2020
|
Filo Mining Outlines Potential to Significantly Expand the Current Filo Del Sol Resource
|
June 25, 2020
|
Filo Mining's Latest Drill Results Include 73 Metres of 2.04% CuEq (1.19% Copper and 1.06 g/t Gold)
|
May 20, 2020
|
Filo Mining Reports 2019 Results and Provides Statement on Readiness and Response to COVID-19
|
March 19, 2020
|
Filo Mining Drills 84 Metres of 0.81% Copper and 0.59 g/t Gold & 69 Metres of 1.07% Copper and 0.61 g/t Gold
|
January 7, 2020
|
Filo Mining Announces Closing of C$40 Million Financing
|
August 30, 2019
|
Filo Mining Corp. Announces C$40 Million Financing
|
August 12, 2019
|
Filo Mining Drills 378 Metres of 0.44% Copper and 0.89 g/t Gold at Filo del Sol - Including 12 Metres of 12.60 g/t Gold, 0.54% Copper and 260 g/t Silver
|
May 28, 2019
|
Filo Mining Drills 548 Metres of 0.40% Copper and 0.78 g/t Gold at Filo del Sol - Including 9 Metres of 22.04 g/t Gold
|
May 17, 2019
|
Filo Mining Completes 2018/2019 Drill Program and Provides Guidance on Remaining Assays
|
April 5, 2019
|
Filo Mining Reports 2018 Results
|
March 19, 2019
|
Filo Mining Drills 1,025 Metres of 0.30% Copper and 0.22 g/t Gold at Filo del Sol - Demonstrating the Presence of a Significant Copper-Gold Porphyry Deposit Underlying the Current Resource
|
March 18, 2019
|
Filo Mining Files Technical Report for Flagship Filo del Sol Project
|
February 22, 2019
|
Filo Mining Announces Positive PFS Results for Filo del Sol with a US$1.3 Billion After Tax NPV and 23% IRR
|
January 13, 2019
|
Filo Mining Announces PEA Results for Filo del Sol Project
|
November 29, 2017
|
Aerial view:
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