Data/hora: 11/06/2024 04:26:58

Provedor de dados: | 5
País: | France
Título: | Optimising the use of marine tephrochronology in the North Atlantic: a detailed investigation of the Faroe Marine Ash Zones II, III and IV
Autores: | Griggs, Adam J.; Davies, Siwan M.; Abbott, Peter M.; Rasmussen, Tine L.; Palmer, Adrian P.
Data: | 2014-12
Ano: | 2014
Palavras-chave: | North Atlantic; Tephra; Taphonomy; Synchronisation; Micromorphology.
Resumo: | Tephrochronology is central to the INTIMATE(1) goals for testing the degree of climatic synchroneity during abrupt climatic events that punctuated the last glacial period. Since their identification in North Atlantic marine sequences, the Faroe Marine Ash Zone II (FMAZ II), FMAZ III and FMAZ IV have received considerable attention due to their potential for high-precision synchronisation with the Greenland ice-cores. In order to optimise the use of these horizons as isochronous markers, a detailed re-investigation of their geochemical composition, sedimentology and the processes that deposited each ash zone is presented. Shard concentration profiles, geochemical homogeneity and micro-sedimentological structures are investigated for each ash zone preserved within core JM11-19PC, retrieved from the southeastern Norwegian Sea on the central North Faroe Slope. This approach allows a thorough assessment of primary ash-fall preservation and secondary depositional features and demonstrates its value for assessing depositional integrity in the marine environment. Results indicate that the FMAZ II and IV are well-resolved primary deposits that can be used as isochrons for high-precision correlation studies. We outline key recommendations for future marine tephra studies and provide a protocol for optimising the application of tephrochronology to meet the INTIMATE synchronisation goals.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00496/60734/65220.pdf

https://archimer.ifremer.fr/doc/00496/60734/65221.xlsx

DOI:10.1016/j.quascirev.2014.04.031

https://archimer.ifremer.fr/doc/00496/60734/

Editor: | Pergamon-elsevier Science Ltd
Relação: | info:eu-repo/grantAgreement/EC/FP7/259253/EU//TRACE
Formato: | application/pdf
Fonte: | Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2014-12 , Vol. 106 , P. 122-139

Fonte:

info:eu-repo/semantics/openAccess

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