The incident, at the underground gold mine, occurred on Monday after heavy rains softened the soil around the pit.

Demand from global central banks for gold has been elevated for two years as they diversify their foreign currency reserves.

The company's Winston group of properties contains three past-producing silver and gold mines.

The open pit gold mine is expected to begin production in 2025, with ore being delivered to Ramelius' Mt Magnet hub.

The proposed tax hikes would be offset by the abolition of export duties linked to the rouble-dollar exchange rate that were introduced in October 2023.

The private placement is led by Michael Gentile, one of its largest shareholders, who plans to up his stake to 9.99%.

Claudia Sheinbaum is expected to continue the anti-mining policies of outgoing President Andres Manuel López Obrador.