Papua New Guinea's mining sector accounted for half of GDP.
Papua New Guinea 's economy is dominated by two sectors : the agricultural , forestry , and fishing sector , where most of the labour force of the country is engaged , and the minerals and energy extraction sector from which most of the export earnings are made . Papua New Guinea . Strong growth in Papua New Guinea 's mining and resource sector led to the country becoming the sixth fastest-growing economy in the world in 2011 . Mining remains a major economic factor , however .