Volume 88 Issue 33 | p. 40 | Concentrates
Issue Date: August 16, 2010

Isotopes Help Home In On Ancient Rock

Arctic region lava samples provide an unprecedented view of nascent Earth's geochemical evolution
Department: Science & Technology
Keywords: isotopic ratios, mantle, primitive Earth

Isotopic evidence found in Arctic region lava samples has led scientists to a pristine reservoir of Earth’s mantle that has remained unchanged since nearly the formation of the planet (Nature 2010, 466, 853). Such a find offers scientists an unprecedented view of nascent Earth and a chance to shed light on early geochemical evolution. Scientists had believed the original character of most primordial mantle reservoirs would have been destroyed long ago by constant geological churning . . .

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