Swiss-based mining giant Glencore said Tuesday it was selling its stake in a high-profile Zambian copper mine to a state-owned Zambian concern.

In a statement capping a months-long political wrangle, Glencore said its subsidiary Carlisa Investments Corp. was selling its 90-percent stake in Mopani Copper Mines Plc to ZCCM Investments Holding, which is controlled by the Zambian government.

ZCCM, which owns the remaining 10 percent, is buying Mopani for a nominal $1 and assuming borrowings of $1.5 billion.

The transaction is expected to go ahead within the next three months, subject to the approval of regulatory authorities in Zambia and ZCCM's shareholders, Glencore said.

The borrowings, called a transaction debt, will be owed to Glencore and will be repaid from Mopani revenue. Glencore will retain rights over production from the mine until the loan is reimbursed.

Mopani became a hot political issue last year when Glencore announced that it would slash production after copper prices, which were already soft, were further hit by the coronavirus pandemic.

In early April, the giant mothballed two sites, triggering the anger of the Zambian government and trade unions, who feared job losses.

Production resumed temporarily the following month, but Glencore then said it would close them permanently under a savings programme in the light of the continuing coronavirus emergency.

On December 17, Zambian President Edgar Lungu said the country would take "a significant stake in some selected mine assets," the goal being to "create sufficient wealth for the nation."

He hit out at "mining investors who cry foul" whenever Zambia sought to increase its share of its natural wealth.

"We shall no longer tolerate mining investors who seek to (profit) from our God-given natural resources, leaving us with empty hands," Lungu warned.

Zambia last year saw its external debt surge to nearly $12 billion.

In October, it missed a key payment of interest due on a bond, prompting the ratings agency S&P to declare the country in default.

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