Summary

Mine Type	Underground
Status	Active
Commodities	Copper Gold
Mining Method	Drift & Fill
Production Start	...
Snapshot	The Farellon mine was previously in production dating back to the 1970’s with a reported historical production. The decision to re-commence production on the Farellon deposit is not based on a feasibility study of mineral reserves demonstrating economic and technical viability. On February 8, 2024, Altiplano changed its fiscal year end from December 31 to March 31, which will allow it to complete its audit requirements with greater efficiency. With this year-end change, the Company will report a one-time transactional period for the fifteen months ended March 31, 2024. During the reporting period July-December 2024, no underground mining activity was conducted.

Deposit type

• Porphyry
• Skarn
• IOCG
• Vein / narrow vein

Summary:

The Farellon copper-gold project is located ~ 40 km south of La Serena, Chile. The project lies within the coastal Iron Oxide Copper Gold (IOCG) belt, which runs for hundreds of kilometres and hosts important IOCG and/or porphyry type copper-gold deposits such as Andacollo, Mantos Blancos, Candelaria, and Mantos Verde.

The Farellon project consists of a system of multiple Fe-Cu-Au-veins that strike northeast and dip ~72° to the southeast. The main veins (Farellon, Laura, and Rosario) have been traced in outcrop and underground workings for more than 1.2 km, range in width from 1 to 10 m (~2 m average) and are well mineralized over much of their strike lengths.

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 75° 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

- subscription is required.

Comminution

Crushers and Mills

- subscription is required.

Processing

- subscription is required.

Commodity Production

Commodity	Units	2023	2022	2021	2020	2019	2018
Copper	lbs	....	....	....	....	1,020,614	594,860

Operational metrics

Metrics	2023	2022	2021	2020	2019	2018
Ore tonnes mined	....	....	....	....	26,621 t	30,452 t
Tonnes processed	....	....	....	....	24,945 t	18,346 t

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Aug 4, 2025
.......................	.......................		Aug 4, 2025