Gold Fields yesterday reported improved production and lower cash outflows at its troubled South Deep mine, sending shares soaring more than 20%. Gold Fields shares traded at R37.54 and were headed for the highest daily jump since November 2008.The mechanised South Deep mine, which holds a huge 40million ounces in bullion reserves, is Gold Fields' last remaining South African asset.The mine has been plagued by technical difficulties but a turnaround strategy is beginning to show signs of success.Gold Fields said production at South Deep jumped 42% to 60283 ounces while cash outflows fell to $20-million from $27-million in the previous quarter."Gold production at South Deep is up quite nicely in the quarter," said Noah Capital Markets analyst Rene Hochreiter.Gold Fields, which also operates mines in Australia, Ghana and Peru, said normalised earnings for July-September reached $22-million, the same as the previous quarter. It also said it cut net debt by 3.4% to $1.42-billion.The company said it was deciding whether to place its Damang mine in Ghana under "care and maintenance" -- pulling back on certain mining activities - until gold prices recover or injecting cash to access deeper higher quality ore."If the results of the study indicate that we are going to need higher gold prices to make it work we may decide to pull back," chief executive Nick Holland said.Around 2000 jobs are at risk if the mine is be placed under care and maintenance, he said. ..