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
Fastmarkets has corrected the rationale for MB-COA-0003 Premium hard coking coal, fob eastern Australian ports, $/wmt, which was published incorrectly on Tuesday July 7 due to a typographical error.
The publication of Fastmarkets' flat steel reduced carbon emissions, daily inferred price for Tuesday July 7, 2026 was delayed due to a procedure lapse. Fastmarkets' pricing database has been updated.
New York-headquartered global commodities company Hartree Partners will take the first 330,000 tonnes of copper concentrate from Blue Moon Metals' Nussir project in Norway, Christian Kargl-Simard, the critical metals developer's chief executive officer, told Fastmarkets on Monday July 6.
Fastmarkets has amended the holiday pricing schedule for the aluminium P1020A, fob Indonesia premium assessment, with the changes taking effect from Tuesday July 7.
Prices for tungsten hexafluoride (WF6), a specialty gas used in advanced semiconductor manufacturing and increasingly linked to AI-driven chip demand, have surged in recent months amid tightening supply and growing expectations for next-generation memory production.
Fastmarkets will publish the following eight China containerboard price assessments on Thursday December 31, 2026 at 2pm Beijing time due to the New Year’s Day holiday on Friday January 1, 2027.