Deep-seated fractionation during the rise of a small-volume basalt magma batch: Crater Hill, Auckland, New Zealand

• Published in: Contributions to mineralogy and petrology Vol. 155; no. 4; pp. 511 - 527
• Main Authors: Smith, I. E. M., Blake, S., Wilson, C. J. N., Houghton, B. F.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.04.2008; Springer Nature B.V
• Subjects: Basalt; Crystals; Earth and Environmental Science; Earth Sciences; Fractionation; Geology; Lithosphere; Magma; Mineral Resources; Mineralogy; Original Paper; Petrology; Silica; Volcanic fields; Volcanoes; New Zealand; Mantle processes; Pyroxene paradox; Magma zoning; Auckland volcanic field; Alkali basalt; Crystal fractionation

Crater Hill is a small volume alkali olivine basalt volcano in the Auckland volcanic field. Crater Hill consists of a sequence of pyroclastic and effusive eruptive units of which the earliest have low silica, ferromagnesian elements and Mg/Fe ratios, high incompatible elements and are more silica un...