MARIKANA, South Africa — Striking platinum miners in South Africa have accepted an agreement for higher wages with London-registered Lonmin PLC and plan to return to work Thursday, a mediator said of the bloody strike that lasted nearly six weeks and also included gold and chrome miners.

The deal reached Tuesday includes a 22 percent pay increase and a one-time payment of $250 to help cover the no-work, no-pay stoppage, according to Bishop Joe Seoka, a member of the negotiating team and head of the South African Council of Churches.

The strike, which has hurt South Africa’s vital mining sector, began Aug. 10 and was marked by violence in which 45 people were killed. On Aug. 16, police opened fire on demonstrating strikers, killing 34 and wounding 78 in a display of state violence that shocked the nation.

About 5,000 strikers gathered in a stadium Tuesday to listen to the deal and cheered when they accepted the offer. They then formed a line and danced out of the stadium.

Seoka said he will go back to the negotiations with Lonmin management to finalize the deal Tuesday night.

‘‘You have won as workers!’’ Seoka told the crowd. He said there will be further negotiations in October at which they can discuss a further increase.

One worker held up a hand inscribed in black ink with the phrase ‘‘Mission Accomplished.’’