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Chile
Farellon Mine

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 Location:
32 km S from La Serena, Chile

  Address:
10545 - 45 Avenue NW 250 Southridge NW, Suite 300
Edmonton
Alberta, Canada
T6H 4M9
Phone  ...  Subscription required
Fax1-780-439-7308
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Sales
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Copper
  • Gold
Mining Method
  • Drift & Fill
Processing
  • Filter press plant
  • Dewatering
  • Dry Screening
  • Flotation
  • Magnetic separation
Altiplano has extracted ore at Farellon since Q1 2018. Proceeds from the sale of mineralized material are credited to exploration and evaluation properties as the Company has not yet commenced commercial production.
A 5,000 tonnes/month processing facility permitted and under construction with final completion expected Q1 2022.
The decision to commence production on the Farellon deposit is not based on a feasibility study of mineral reserves demonstrating economic and technical viability and there is increased uncertainty and economic and technical risks of failure associated with the production decision.
Latest NewsAltiplano Receives Final Processing Permit and Begins Operations at El Penon     June 23, 2022


Owners

Source: p. 6
CompanyInterestOwnership
Altiplano Metals Inc. 100 % Indirect
Altiplano Chile Ltda (operator) 100 % Direct
The Farellon Project is now operated by Altiplano Chile Ltda, the Chilean subsidiary of Altiplano.

Deposit Type

  • IOCG
  • Vein / narrow vein


Summary:

Deposit types found in the La Serena region of northern Chile include massive magnetite, Manto-Style copper-(silver), iron oxide-copper-gold (IOCG) deposits, and copper-gold veins potentially related to porphyry systems. These deposits are found within the early-Jurassic to mid-Cretaceous rocks, and appear to be formed through regional faulting and extension and localized structural systems. Review of the historic literature and a site visit completed by the authors determined that the primary exploration target for the Farellon project is copper-gold veins as each comprise high-grade structures with these metals.

The Farellon area lies in the contact zone between regional granodiorite and diorite bodies to the west and north respectively, as well as Cretaceous-aged formations of stratified rocks including volcaniclastic sediments, tuffs, limestones and sandstones. The proximity of the intrusive bodies produced contact metamorphism (hornfels) and metasomatism, resulting in areas of skarnification and strong silicification (Denmark, 2008).

The intrusions and subsequent movement produced a complex structural system. The dominant fractures in the stratified rocks and intrusive rocks are orientated between 50o (northeast) and 75o (east-northeast).

Secondary fracturing is mainly in an east-west orientation, with sporadic downdropping of the rocks to the south (Denmark, 2008).

While the geological map shows much of the Farellon Project area underlain by volcanic rocks at surface, much of the area is actually covered with a thin veneer of volcanic rocks. The main host rocks to the Farellon copper-gold vein structures are altered granodiorite with the vein structures on the property trending mostly 75o eastnortheast.

Copper +/- gold vein mineralization on the Farellon Property is found within discrete and laterally continuous east-northeast trending vein systems predominantly in the Cretaceous granite to granodiorite unit. There are three main veins structures that can be traced along strike for 1 to 2 km, the Farellon, Laura and Rosario veins. Mineralization within the Farellon vein structure consists of copper +/- gold, with grades of the reported historic mining averaging on the order of 2.5% Cu and 0.5 g/t Au. The Farellon area veins historically are known for their high-grade copper values.

In the Farellon area, the high temperature mineralized solutions, likely emanated from local proximal granitoid intrusive bodies resulting in fracture infill veining within both the intrusive bodies as well as the stratified rock units. The mineralization includes mainly copper (+/- gold), with mainly chalcopyrite, bornite along with significant hematite and magnetite, with minor pyrite and gangue minerals that include actinolite, quartz and apatite (Denmark, 2008). Strong epidote alteration can be seen in the wall rocks and in the veins. The hematite and magnetite content of the veins is often sufficient enough to be produced as an iron by-product by the local miners.


Mining Methods

  • Drift & Fill


Summary:

Altiplano has been recovering Cu-Au mineralized material from an underground decline through a series of drifts.


Crushing and Grinding
Flow Sheet: Source
Crusher / Mill TypeModelSizePowerQuantity
Ball mill 5' x 10' 2

Summary:

The Plant has been on recent care and maintenance and includes the following equipment: primary, secondary, and tertiary crushing, milling, two 5’ x 10’ ball mills, and a full flotation circuit. The Plant will be demobilized and moved approximately 280 kms to the Mill Site.


Processing

  • Filter press plant
  • Dewatering
  • Dry Screening
  • Flotation
  • Magnetic separation

Flow Sheet: Subscription required

Summary:

Plant includes two 5’ x 10’ ball mills, crushing and milling equipment and a full flotation circuit. Located 15 kms from Farellon.

Final circuit will include a de-watering system and magnetic separator. Dewatering system will reduce freshwater consumption by 75% and will reduce tailings footprint by 45%.

Magnetic Separation
The magnetic separation process uses the magnetic properties of the magnetite mineralization found within the material mined at Farellon. Magnetic iron is recovered by processing the tailings generated from the Cu flotation through a series of three magnetized drums. This process attracts and traps the magnetic mineralization within the circuit (Figure 1). The iron concentrate collected from the drums will be processed further using a disc filter to remove the water. The process will produce a concentrate expected at > 61% Fe with a moisture content of less than 15%. The full magnetic separation and dewatering process is expected to recove ........

Recoveries & Grades:

CommodityParameter202020192018
Copper Head Grade, %  ......  Subscription required  ......  Subscription required1.54

Production:

CommodityUnits202020192018
Copper lbs  ......  Subscription required  ......  Subscription required594,860
All production numbers are expressed as payable metal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018
Ore tonnes mined  ......  Subscription required26,621 t30,452 t
Tonnes processed  ......  Subscription required24,945 t18,346 t
Subscription required - Subscription is required.

Reserves at May 25, 2018:
Inferred mineral resource at a 1.0% Cu cut-off grade.

CategoryTonnage CommodityGrade
Inferred 278,360 t Copper 1.92 %
Inferred 278,360 t Gold 0.12 g/t

Financials:

Units202020192018
Revenue M USD  ......  Subscription required  ......  Subscription required1.3  
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 10, 2018
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Technical Report 2018
Subscription required - Subscription is required.

News:

NewsDate
Altiplano Receives Final Processing Permit and Begins Operations at El Penon June 23, 2022
Altiplano Reports on Construction Progress at El Penon Processing Facility February 8, 2022
Altiplano Reports 3.18 % Cu over 3.67 Metres in Recent Drilling Confirming Continuation of High-Grade Copper Results at Farellon January 13, 2022
Altiplano Receives Approval for Industry Leading Water Recovery Circuit and Iron Separation at the El Peñón Processing Facility December 16, 2021
Altiplano Begins Advance to the 352 m Level at Farellon and Completes Ventilation Upgrades December 7, 2021
Altiplano Reports 2.54% Copper over 5.5m from Ongoing Exploration Drill Program at Farellon November 3, 2021
Altiplano Begins Mining at the 360 m Level at Farellon September 24, 2021
Altiplano Reports Results at Farellon for July 2021 August 26, 2021
Altiplano Begins Ventilation Improvements at Farellon July 15, 2021

Aerial view:

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