Mineral resource assessment of Maori land, stage 1 : progress toward a national GIS and a preliminary mineral resource assessment of the Raukumara area, North Island

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Christie, A.B. 2007 Mineral resource assessment of Maori land, stage 1 : progress toward a national GIS and a preliminary mineral resource assessment of the Raukumara area, North Island. Lower Hutt, N.Z.: GNS Science. GNS Science report 2007/10 27 p. + 1 CD

Abstract: A GIS database of Mâori land, geology and known mineral deposits has been assembled to highlight mineral potential and estimate undiscovered mineral resources on Mâori land and land under treaty claims. The main known metalliferous mineral deposits on Mâori land are ironsands on the west coast of the North Island, epithermal gold-silver and mercury deposits in Northland, Coromandel and the Taupo Volcanic Zone, and volcanogenic massive sulfide deposits in Northland and East Cape regions. Apart from rock aggregate and limestone, the main industrial mineral potential lies within the volcanic rocks of Northland, Coromandel and the Taupo Volcanic Zone, specifically clays, zeolite, pumice, perlite and amorphous silica. The main problem encountered was determination of the extent of Mâori land ownership and estimation of land involved in future treaty claim settlements. A second part of the study was the assessment of mineral resources on Mâori land in the Raukumara area of eastern North Island. Potential resources of aggregate, sand and limestone are present, but their development would depend on local market demand. Clay resources may have higher value and wider markets. Gold and copper in volcanogenic massive sulfide deposits offer the greatest potential for wealth generation provided an economic deposit can be found. (auth)