Isotope and trace element geochemistry of MORB from the Nansen-Gakkel ridge at 86° north

Autor:	H. Bohrmann, Richard Mühe, Colin W. Devey
Rok vydání:	1993
Předmět:	Basalt geography geography.geographical_feature_category Equator Geochemistry Trace element Mid-ocean ridge Mantle (geology) Geophysics Arctic Space and Planetary Science Geochemistry and Petrology Downwelling Earth and Planetary Sciences (miscellaneous) Upwelling Geology
Zdroj:	Earth and Planetary Science Letters. 120:103-109
ISSN:	0012-821X
DOI:	10.1016/0012-821x(93)90233-y
Popis:	The geochemistry of mid-oceanic ridge basalts from 86°N (Arctic Ocean) provides, for the first time, an insight into the composition of the mantle around the North Pole. Our data show the source region of the Arctic basalts to possess traces of an enrichment similar to the DUPAL signature. This is remarkable since up to now the DUPAL signature has been believed to be present only in Indian but not in Atlantic or Pacific MORB. These results also argue against a model of whole-mantle convection, in which upwelling of enriched material at the equator is balanced by downwelling of depleted material at the poles
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4ecef5879a84d187b690ff92094d415f https://doi.org/10.1016/0012-821x(93)90233-y Zobrazit plný text záznamu