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Strontium and lead isotopic ratios, heterogeneous accretion of the Earth, and mantle plumes

Authors
Journal
Geochimica et Cosmochimica Acta
0016-7037
Publisher
Elsevier
Publication Date
Volume
40
Issue
4
Identifiers
DOI: 10.1016/0016-7037(76)90014-4

Abstract

Abstract If the Earth formed by accretion of volatile-rich material on to a refractory, primitive body with incomplete subsequent mixing, old or deep-seated igneous rocks should exhibit an anti-correlation between radiogenic Pb and radiogenic Sr. The ancient Amîtsoq gneiss and some modern oceanic rocks appear to comply with this model. Mantle plumes should not be a source of radiogenic Sr.

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