Surface gold mining company DRDGold on Wednesday reported a 54% fall in operating profit to R102.2-million in the six months to December 31, but a major jump in mineral reserves. Reserves shot up by 83% to six-million ounces of gold from a former 3.28-million ounces but gold production in the period was 3% lower at 2 280 kg, reflecting a 2% decline in overall throughput to 12 004 000 t and a slight decline in the overall average yield to 0.190 g/t.