The deputy general secretary of trade union Solidarity, Gideon du Plessis, said Gold One now had the huge task of getting the Grootvlei mine operational again.
The union had already started labour negotiations and was heartened that the companies had indicated that former Aurora and Pamodzi employees would get preference for hiring.
However, there was still uncertainty about the company's Orkney assets, and Solidarity appealed to Pamodzi's liquidators to conclude their sale.
Solidarity questioned the suitability of the prospective buyer of the Orkney assets, China African Precious Metals (CAPM), claiming it had defaulted on its electricity bill.
"In addition, CAPM's security services provider recently suspended its services to the company owing to nonpayment. An alternative buyer is the only option. We cannot allow the tragedy to be repeated for a third time," Du Plessis said.