There will also be job losses at its Kloof 2 plant, which has had insufficient processing material after the Kloof 4 shaft was closed in 2023, it added.
"The proposed restructuring of the operations and services could potentially affect 3,107 employees and 915 contractors," Sibanye said.
The miner, South Africa's biggest mining sector employer, is also cutting some administrative jobs as it adjusts to the reduced mining headcount group-wide.
The company would "continue to act prudently to protect the balance sheet and ensure the sustainability of the group", CEO Neal Froneman added in the statement.
Sibanye's plans to lay off workers are subject to consultations with trade unions, in terms of South Africa's labour laws.
The National Union of Mineworkers (NUM) described Sibanye's proposed job cuts as "shocking capitalist barbarism" and called on Sibanye's top management to resign.
"It is very shocking in the sense that the gold price is high," NUM, South Africa's biggest mineworker union, said in a statement. "We are also questioning the timing of this announcement, especially as we are about to enter into wage negotiations with the company."
Another union, Solidarity, said it would oppose the planned job cuts.
"Solidarity will do everything in its power to protect its members’ jobs," it said in a separate statement.
Sibanye has already cut about 2,000 jobs at its platinum group metal (PGM) operations following the restructure of loss-making shafts after metal prices fell sharply last year.
Last year, it reported impairments of $2.6bn at its US palladium mines, a nickel operation in France and a gold mine in South Africa, traced in part to the fall in metal prices and an uncertain outlook.
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