Origin of mafic enclaves in the granitoids at Kawakaputa Point, New Zealand
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Field and laboratory work was performed on the Austin Quartz Monzodiorite, its enclaves and the Wakaputa Granite during 2003 along the coast of Kawakaputa Point to study the field relations between the rock units and the origin and formation of the mafic enclaves that occur in abundance in the Austin Quartz Monzodiorite. Field relations, mineral chemistry and major and trace element geochemical data revealed that the Wakaputa Granite is not related to the Austin Quartz Monzodiorite or the enclaves by simple fractionation processes and probably intruded the diorite at a later stage. Field relations, petrography and whole-rock major element geochemistry of the mafic enclaves showed that there is no simple relation to the Austin Quartz Diorite. Differences in trace element data and especially the high REE content of the mafic enclaves show that their magma source is of a different origin than that of the Austin Quartz Diorite. The mafic enclaves probably formed due to intrusion and mingling of a more mafic magma into the dioritic magma chamber.
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58 leaves : ill. (some col.), maps (some col., 1 folded) ; 30 cm.
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2003Panienka
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POLYGON ((167.77711882134858 -46.385941609650942,167.793023971268497 -46.386073507788645,167.792373830281036 -46.392891111635954,167.777380181663005 -46.392205460373916,167.77711882134858 -46.385941609650942))
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Panienka, Sandra., “Origin of mafic enclaves in the granitoids at Kawakaputa Point, New Zealand ,” Otago Geology Theses, accessed February 8, 2025, https://theses.otagogeology.org.nz/items/show/417.