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Rio Tinto Halts Underground Operations at Mongolia Mine After Seismic Event

MT Newswires·10/30/2026 01:12:47
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01:12 AM EDT, 10/30/2026 (MT Newswires) -- Rio Tinto Group (RIO.L) temporarily suspended underground operations at the Oyu Tolgoi copper-gold mine in Mongolia after a seismic event injured three employees. The mining company said Friday that seismic activity along a rock fault zone on Thursday caused ground vibrations in the underground mine. Underground operations will remain paused until a safety review is complete.