Evidence for the survival of the oldest terrestrial mantle reservoir

Matthew G. Jackson (), Richard W. Carlson, Mark D. Kurz, Pamela D. Kempton, Don Francis and Jerzy Blusztajn
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Matthew G. Jackson: Boston University
Richard W. Carlson: Carnegie Institution of Washington
Mark D. Kurz: Woods Hole Oceanographic Institution
Pamela D. Kempton: Natural Environment Research Council (NERC), Polaris House
Don Francis: Earth and Planetary Sciences, McGill University
Jerzy Blusztajn: Woods Hole Oceanographic Institution

Nature, 2010, vol. 466, issue 7308, 853-856

Abstract: High 3He/4He ratios in some basalts have been interpreted as evidence for ancient reservoirs preserved in the Earth’s mantle; however, such rocks have never been observed to host the primitive lead-isotopic compositions required for an early formation age. These authors show that Baffin Island and West Greenland lavas exhibit primitive lead-isotope ratios consistent with a mantle source age of 4.55–4.45 billion years, and that their source may be the most ancient accessible reservoir in the mantle.

Date: 2010
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DOI: 10.1038/nature09287

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