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Lundin Mining provides Ojos del Salado Operations update

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Global Mining Review,

Lundin Mining Corp. continues to investigate the cause of a sinkhole that was detected near the Alcaparrosa mine of its Minera Ojos del Salado operations in Chile on 30 July 2022, and is cooperating fully with Chilean regulatory authorities in relation to the incident.

All personnel at the operation and in the community are safe and the appearance of the sinkhole did not result in any injuries. As a precautionary measure, development work in an area of the Alcaparrosa underground mine was halted immediately upon detection of the sinkhole, and subsequently all mining operations suspended at Alcaparrosa. On 4 August 2022, Chile’s National Service of Geology and Mining (Sernageomin) issued a notification to maintain suspension of all mining activities in Alcaparrosa.

“Our actions in responding to this incident are guided first and foremost by the safety of personnel and community members,” said Peter Rockandel, President and CEO of Lundin Mining. “We are fully committed to working cooperatively with an independent investigation by Sernageomin, in addition to conducting our own investigation, and to communicating regularly with community members, union representatives and other stakeholders to ensure they are informed of developments.”

Contrary to some media reports, the size of the sinkhole has not changed materially since detection. On 30 July 2022, the sinkhole measured approximately 32 m in diameter at the surface, 48 m in diameter at the bottom and 64 m deep. The sinkhole is being continuously monitored and as of 9 August 2022, the diameter at the surface has increased slightly to 36.5 m, while the bottom diameter has remained stable at 48 m and the depth has decreased to 62 m.

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