Data/hora: 07/06/2024 01:05:03

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