Unusual isotopic variations in Nyiragongo nephelinites

Nd and Sr isotopic ratios in Nyiragongo nephelinites are fairly constant and close to ‘bulk Earth’ 1,2 estimates. By contrast, 206 Pb/ 204 Pb variations are the largest ever observed for young volcanic rocks. If the ∼500 Myr Pb–Pb age dates—as we believe—a mantle source event, then the inferred pare...

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Veröffentlicht in:	Nature (London) 1983-01, Vol.301 (5896), p.141-143
Hauptverfasser:	Vollmer, R., Norry, M. J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Earth sciences Earth, ocean, space Exact sciences and technology Humanities and Social Sciences Isotope geochemistry Isotope geochemistry. Geochronology letter multidisciplinary Science Science (multidisciplinary)
Online-Zugang:	Volltext
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