Data/hora: 15/06/2024 09:05:40

Provedor de dados: 	5	
País: 	France	
Título: 	An occurrence of Tuhua Tephra in deep-sea sediments from offshore eastern North Island, New Zealand	
Autores: 	Manighetti, B; Palmer, A; Eden, D; Elliot, M.	
Data: 	2003-12	
Ano: 	2003	
Palavras-chave: 	Mayor Island; Tephrochronology; Holocene; Tuhua Tephra; Isopach.	
Resumo: 	We identify c. 7000 cal yr BP Tuhua Tephra in a marine sediment core from offshore eastern North Island, New Zealand. Its mineral assemblage includes aegirine, which is diagnostic for the Tuhua (Mayor Island) Volcanic Centre, and electron microprobe analyses of glass shards yield compositions close to published analyses of the tephra onshore, closer to the source. Associated radiocarbon ages on planktonic foraminifera from the core show that its age lies within the range previously determined for the caldera-forming event that generated Tuhua Tephra. This occurrence, &gt;380 km southeast of the source, indicates that the dispersal of the ash was bi-directional, and that earlier estimates of this tephra's volume may be conservative.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00225/33656/32097.pdf

DOI:10.1080/00288306.2003.9515031

https://archimer.ifremer.fr/doc/00225/33656/	
Editor: 	Taylor &amp; Francis Ltd	
Formato: 	application/pdf	
Fonte: 	New Zealand Journal Of Geology And Geophysics (0028-8306) (Taylor &amp; Francis Ltd), 2003-12 , Vol. 46 , N. 4 , P. 581-590	
Fonte: 	The Royal Society of New Zealand 2003

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