# Aclara updates preliminary economics for Chile’s Penco rare-earth project > Aclara Resources reported an updated preliminary economic assessment for its Penco ion-adsorption clay project in Chile’s Biobío region. Announced on 19 October, the study presents a resource-based project scenario; the technical report has an effective date of 18 September 2026. - Canonical URL: https://newsverum.com/en/news/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026 - Publisher: Newsverum - Section: Business - Country: Chile - Published: 2026-10-21T00:43:59+00:00 - Updated: 2026-10-21T00:43:59+00:00 - Event / data period: 2026-10-19 - Other editions: [Türkçe](https://newsverum.com/tr/news/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026.md), [العربية](https://newsverum.com/ar/news/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026.md), [Français](https://newsverum.com/fr/news/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026.md), [Español](https://newsverum.com/es/news/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026.md), [Deutsch](https://newsverum.com/de/news/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026.md), [Português](https://newsverum.com/pt/news/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026.md) The assessment estimates a 17-year mine life and average annual production of 732 tonnes of rare-earth oxides contained in super-pure rare-earth carbonate. It lists 35.8 million tonnes of measured and indicated mineral resources and another 2.2 million tonnes inferred. These are preliminary assessment estimates, not current production. The first-stage environmental approval covers the Victoria Norte, Luna and Maite extraction zones, the Neptuno deposition zone and the processing plant; remaining zones are expected to require a separate second-stage assessment. ## Data ### Announced development Scope of the development stated in the official announcement. Methodology: Event and scope details are transcribed from the primary announcement; plans are not presented as completed results. | date | label | description | status | |---|---|---|---| | 2026-10-19 | Updated preliminary economic assessment | PEA announced | occurred | Sources: · Download data: [JSON](https://newsverum.com/api/v1/articles/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026/data/announcement?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/aclara-updates-penco-chile-rare-earth-project-preliminary-economics-2026/data/announcement?lang=en&format=csv) ## Sources - [Aclara Resources]() (Source checked: 2026-10-21; Published: 2026-10-19) --- Cite the canonical URL above. [Editorial standards and corrections](https://newsverum.com/en/editorial)