The Association of Mineworkers and Construction Union (Amcu) says it will not accept the latest wage offer by platinum producers.
The labour union met with mining companies on Wednesday to try and end industrial action over wages in the sector.
About 100 000 mineworkers embarked on strike action on Thursday last week, demanding a minimum salary of R12 500.
There was hope that the strike would come to an end this week but Amcu members are adamant they will not settle for less than a R12 500 basic salary for workers.
The new wage offer from employers is apparently not even close to what the miners are demanding.
The offer will be presented to the miners in Rustenburg today, but union leaders insist it will not be accepted.
Platinum producers have come up with a three-year agreement.
Meanwhile, the Labour Court has ruled this morning Amcu cannot strike in the gold sector.