Data/hora: 12/06/2024 00:39:21

Provedor de dados: | 5
País: | France
Título: | Alteration, fractional crystallization, partial melting, mantle properties from trace elements in basalts recovered in the north atlantic
Autores: | Bougault, Henri; Joron, Jean-louis; Treuil, Michel.
Data: | 1979
Ano: | 1979
Palavras-chave: | Histoire Ifremer.
Resumo: | .-Alkali metals prove to be very sensitive to alteration process even if this process is moderate. It is very difficult to use these elements to trace magmatic processes since their concentration may Vary within an homogeneous "unaltered" unit. From all the basaltic units investigated, a classification of "low partition coefficient" elements is presented (Sc, Ti, V, Y, Zr, Nb, La-Tb , Hf, Ta, Th) . The incompatible elements ratios (Y/Tb, Zr/Hf, Nb/Ta) are constant in the samples studied and are nearly equal to the same ratios in chondrites. This is consistent with the existence of an homogeneous primordial mantle at the scale of the North Atlantic, compatible with a chondritic composition of the earth. [NOT CONTROLLED OCR]
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1979/publication-5253.pdf
Editor: | AGU
Relação: | http://archimer.ifremer.fr/doc/00000/5253/
Formato: | application/pdf
Fonte: | 2nd Maurice Ewing Symposium (AGU), 1979 , P. 352-368
Fonte: | AGU