Dun Mountain Ophiolite Belt, East Nelson : desktop study and geochemical survey for chromite ± PGE deposits and Cu-rich VMS deposits

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Brathwaite, R.L.; Jongens, R.; Christie, A.B.; Lukovic, B. 2012 Dun Mountain Ophiolite Belt, East Nelson : desktop study and geochemical survey for chromite ± PGE deposits and Cu-rich VMS deposits. Lower Hutt, N.Z.: GNS Science. GNS Science report 2012/10 [57] p. + 1 CD

Abstract: The Dun Mountain Ophiolite Belt (DMOB) in east Nelson contains numerous chromite and copper occurrences, some of which were mined historically (1859-1908) on a small scale. Chromite occurs as podiform deposits mainly in a zone of serpentinised dunite and harzburgite at the top of a peridotite tectonite unit. The Cu mineralisation occurs as small lenses of pyrrhotite with minor chalcopyrite in serpentinite shear zones near the top of the ultramafic sequence. GNS Science was commissioned by the Ministry of Economic Development (now the Ministry of Business, Innovation and Employment) to undertake a desktop study, together with a reconnaissance geochemical field survey, with the objective of reviewing the exploration potential of the DMOB for chromite ± platinum group elements (PGE) deposits and Cu-rich volcanic massive sulphide (VMS) deposits. (auth)