Construction of the North Head (Maungauika) tuff cone: a product of Surtseyan volcanism, rare in the Auckland Volcanic Field, New Zealand

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• 作者：Javier Agustín-Flores ; Károly Németh ; Shane J. Cronin…
• 关键词：Auckland Volcanic Field ; Monogenetic ; Phreatomagmatic ; Surtseyan ; Tuff cone
• 刊名：Bulletin of Volcanology
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：77
• 期：2
• 全文大小：20,930 KB
• 参考文献：1. Agustín-Flores J, Németh K, Cronin S, Lindsay J, Kereszturi G, Brand B, Smith IEM (2014) Phreatomagmatic eruptions through unconsolidated coastal plain sequences, Maungataketake, Auckland Volcanic Field (New Zealand). J Volcanol Geotherm Res 180:203-24
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• 刊物主题：Geology; Geophysics/Geodesy; Mineralogy; Sedimentology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0819

文摘

The Auckland Volcanic Field (AVF) comprises at least 52 monogenetic eruption centres dispersed over ?60?km2. Eruptions have occurred sporadically since 250?ka, predominantly when glacio-eustatic sea levels were lower than today. Now that around 35?% of the field is covered by shallow water (up to 30?m depth), any eruption occurring in the present or near future within this area may display Surtseyan dynamics. The North Head tuff cone evidences eruptive dynamics caused by magma interaction with seawater. The first stages of the eruption comprise a phreatomagmatic phase that built a 48-m-high tuff cone. North Head tuff deposits contain few lithic fragments (