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| Elkins, Lynne J.; Meyzen, Christine M.; Callegaro, Sara; Marzoli, Andrea; Bizimis, Michael. |
| The driving processes responsible for producing the Central Atlantic Magmatic Province, the Large Igneous Province associated with end-Triassic rifting of Pangea, remain largely debated. Because their compositions encompass most of the Central Atlantic basalt spectrum, tholeiites from southern Eastern North America are considered pivotal for identifying magma origins. New(176)Hf/Hf-177 measurements for 201 Ma Eastern North American tholeiites dominantly record a local petrogenetic history. Their epsilon(Hf)ratios, corrected to an emplacement age of 201 Ma (-7.85 to +5.86), form a positive but shallowly sloped array slightly deviating from the terrestrial array on a epsilon(Hf)versus epsilon(Nd)diagram. Comparison of(176)Hf/Hf-177 to other isotope ratios... |
| Tipo: Text |
Palavras-chave: Basalt; CAMP; Hafnium; Rift; LIP; Isotope. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00687/79862/82716.pdf |
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