20 refs; 3 figs

Waikato coalfields contain some 1800 million tonnes of coal-in-ground, mainly low sulphur, low ash, sub-bituminous coal in seams 2 to 30 m thick. Differences in the geological settings of individual coalfields affect coal properties and mineability. In particular, weak overburden rocks and widespread structural disturbance of coal seams cause problems for underground mining. Exploration of north Waikato coalfields is almost complete and some preliminary mining feasibility studies have been carried out. South Waikato coalfields are less well known. Some 170 million tonnes of coal-in-ground is known from Taranaki coalfields, mainly low to medium ash and medium to high sulphur, sub-bituminous coal in seams 1-5 m thick, which are only slightly disturbed structurally. Exploration is at an early stage in some areas. (auth)

GS