Gold Fields, which owns 90 percent of the mines, said the strike related to a dispute over the profit share payments to employees.
"Gold Fields regrets to report that employees at its Tarkwa and Damang mines in Ghana, in which it has a 90 percent interest, have today, at approximately 11.00am (Ghana time), embarked on illegal industrial action which has led to production at both mines being stopped," the gold miner said in a statement. "This follows after the Ghana Mineworkers Union (GMU) and its affiliates, the Professional Managerial Staff Union and the Branch Union, yesterday presented management at both mines with a number of demands, and threatened industrial action should the company not respond favourably to the demands within 24 hours.
"The demands relate to a dispute in the determination of profit share payments to employees; the unconditional reinstatement of an employee who was dismissed following an internal disciplinary procedure; dissatisfaction with certain management structures; the removal of certain members of senior management; concerns about catering delivery models; and allegations of discrimination between expatriate and Ghanaian employees.
"Gold Fields is analysing and investigating the demands as a matter of urgency."
Gold Fields employs about 3,000 people at the mines.
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