Escondida strike averted after union, BHP extend mediation to sign deal

The union at Escondida and BHP, the Chilean copper mine’s majority shareholder and operator, have agreed to extend wage negotiations until Friday August 13, so a deal can be signed and a strike averted.

The new labor contract has been accepted by the No1 Workers Union and ratified by its members and just needs to be signed, the miner said on Thursday.

Members of the union, which represents workers at the world’s largest copper mine, voted to go on strike on July 31, after rejecting the then-latest offer from Escondida. That vote led to further talks mediated by the Chilean government.

The original deadline was Thursday, but the two sides were close to a deal earlier in the week.

“Union No.1 and the company requested to extend the mediation for one more day, until August 13 to proceed with the signing of the new collective contract that was ratified by the members of the Union,” BHP said on Thursday.

BHP owns 57.50% of Escondida shares and is its operator, while Rio Tinto holds 30% and a Japanese consortium possesses the remaining 10%. The mine produced 1.19 million tonnes of copper in 2020, largely stable from the previous year, according to data from the Chilean copper commission, Cochilco.

Escondida, however, is just one of several Chilean copper mines facing the threat of industrial action and while it has avoided a walkout, on August 10 a strike began at Minera Lumina’s Caserones mine and on August 12 workers at Codelco’s Andina also downed tools.

Chilean copper output has been recently recovering, despite a lower contribution from Escondida, and the increase in supplies was providing tailwinds to treatment and refining charges (TC/RCs) from Asian smelters.

Fastmarkets’ copper concentrates TC index, cif Asia Pacific was calculated at $54.60 per tonne on Friday, up by 5.41% from $51.80 per tonne the week before, and reached its highest since $54.90 per tonne on April 24, 2020.

Ana de Liz in London contributed to this report.

What to read next
Following an informal consultation with the market, and a review of typical data sets that are collected over the recent months, Fastmarkets now proposes to increase the frequency of MB-BX-0016 Bauxite, cif China, $/dmt price to weekly basis and extend the timing of the price to reflect cargoes for arrival within 90 days, as well as moving the publish time to Friday from Wednesday.
Fastmarkets has launched the MB-BX-0017 Bauxite, FOB Guinea price, $/dmt on Friday December 19, 2025.
Fastmarkets has corrected the MB-ALU-0002 Alumina index, fob Australia, $/tonne, which was published incorrectly on Wednesday December 17 due to a procedural lapse. Fastmarkets has also corrected the index's rationale and all related inferred indices.
Explore the base metals outlook 2026 and learn how market trends are impacting copper, tin, and other metals this year.
Fastmarkets proposes to amend the pricing frequency of its copper grade A cathode premium, delivered Germany; copper grade A cathode premium, cif Leghorn; and copper EQ cathode premium, cif Europe to one a week from the current fortnightly basis, effective December 30.
The publication of Fastmarkets’ black mass inferred prices for Monday December 8 were delayed due to a technical error. Fastmarkets pricing database has been updated.