标题：Using quartz and plagioclase to gain insight into chemical and thermal evolution of the Rotoiti magma prior to the caldera-forming eruption ±55 ka, New Zealand
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2008
卷号：3
出版社：IOP Publishing
摘要：The zoned plagioclase and quartz crystals within the multiple magmas that erupted during the ~55 ka Rotoiti caldera forming eruption appear to have had complex thermal and compositional histories. Compositional zoning suggests that magmatic systems were open, and received multiple pulses of hotter and more mafic magma. Limited diffusion across the crystals indicates that crystals did not dwell at magmatic temperatures for prolonged periods (<100 years), and suggest that the melts were generated and erupted quickly.
关键词：rhyolite, magma storage, magma mixing, quartz, plagioclase.
