Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados ArchiMer (2) Autor Abbott, P. M. (2) Davies, S. M. (2) Pearce, N. J. G. (2) Austin, W. E. N. (1) Bourne, A. J. (1) Brendryen, J. (1) Purcell, C. S. (1) Rasmussen, T. L. (1) Scourse, J. D. (1) Wastegard, S. (1) Mais... Palavra-chave Iceland (2) Isochrons (2) Volcanic ash (2) Major and trace element geochemistry (1) Marine sequences (1) Palaeoclimate synchronisation (1) Palaeoclimatic synchronisation (1) Tephrochronology (1) Mais... Tipo do documento Text (2) Ano 2016 (1) 2014 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record ArchiMer Abbott, P. M.; Austin, W. E. N.; Davies, S. M.; Pearce, N. J. G.; Rasmussen, T. L.; Wastegard, S.; Brendryen, J.. Previous studies of marine sequences from the Faroe Islands region have identified a series of coarse-grained tephra horizons deposited during Marine Isotope Stage (MIS) 5. Here we reassess the MIS 5 tephrostratigraphy of the Faroe Islands region and focus on the cryptotephra deposits preserved within the fine-grained fraction of marine core LINK 16. We also extend the record to encompass the late MIS 6 and early MIS 4 periods. A density separation technique, commonly used for tephra investigations in lacustrine settings but rarely applied to marine sediments, is utilised to explore the fine-grained material and EPMA and LA-ICP-MS are employed to determine the major and trace element composition of individual tephra shards. In total, 3 basaltic and 3... Tipo: Text Palavras-chave: Volcanic ash; Iceland; Marine sequences; Isochrons; Palaeoclimatic synchronisation. Ano: 2014 URL: https://archimer.ifremer.fr/doc/00290/40096/38832.pdf Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: Exploring linkages to the Greenland ice-cores ArchiMer Abbott, P. M.; Bourne, A. J.; Purcell, C. S.; Davies, S. M.; Scourse, J. D.; Pearce, N. J. G.. The establishment of a tephra framework for the Greenland ice-cores spanning the last glacial period, particularly between 25 and 45 Ica b2k, provides strong potential for precisely correlating other palaeoclimatic records to these key archives. Tephra-based synchronisation allows the relative timing of past climatic changes recorded within different depositional environments and potential causal mechanisms to be assessed. Recent studies of North Atlantic marine records have demonstrated the potential of tracing cryptotephra horizons in these sequences and the development of protocols now allows a careful assessment of the isochronous nature of such horizons. Here we report on tephrochronological investigations of a marine sequence retrieved from the Goban... Tipo: Text Palavras-chave: Tephrochronology; Palaeoclimate synchronisation; Volcanic ash; Isochrons; Iceland; Major and trace element geochemistry. Ano: 2016 URL: https://archimer.ifremer.fr/doc/00421/53274/83380.pdf Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco