The Geology and Ore Minerals of Bluff Hill, Southland, New Zealand.
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The hornblende-rich, Bluff norite appears to represent the upper stages of differentiation of a basaltic magma, the main evidence being the apparently related more basaltic rocks to the west, the richness in primary hydrous silicates, and the presence of iron-rich olivene. Olivene-hypersthene-magnatite intergrowths indicate the formation of hypersthene from olivene by oxidation rather than magmatic reaction.
Disseminated iron-titanium oxides, and iron and copper sulphide minerals are widespread but are not present in any economic quantities.
X-ray work on metamorphic pyrrhotite and micro-textural relations in magmatic iron-titanium oxides indicate metamorphic and magmatic temperatures greater than 550*C and 700*C respectively.
Disseminated iron-titanium oxides, and iron and copper sulphide minerals are widespread but are not present in any economic quantities.
X-ray work on metamorphic pyrrhotite and micro-textural relations in magmatic iron-titanium oxides indicate metamorphic and magmatic temperatures greater than 550*C and 700*C respectively.
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50 leaves ill, photos. 25 cm.
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1965Lindqvist
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Lindqvist, WF, “The Geology and Ore Minerals of Bluff Hill, Southland, New Zealand.,” Otago Geology Theses, accessed April 22, 2025, https://theses.otagogeology.org.nz/items/show/21.