"What is exciting is that this discovery comes at the 50th anniversary of the discovery of komatiites
in the Barberton Mountain Land by Wits Professors, the brothers Morris and Richard Viljoen," says Wilson.
Arndt, "Magnesium and iron isotopes in 2.7 Ga Alexo komatiites
: Mantle signatures, no evidence for Soret diffusion, and identification of diffusive transport in zoned olivine," Geochimica et Cosmochimica Acta, vol.
When the mantle cooled off as Earth grew up, it stopped making those komatiites
(1995): The influence of alteration on the trace-element and Nd isotopic compositions of komatiites
. Chemical Geology 126, 43-64.
However, the Maryland team examined volcanic rocks that flourished in the first half of Earth's history, called komatiites
, and found that these have a different type of composition than what they, or anyone, would have, expected.
& TARNEY, J., 1997.--Dynamic melting in plume heads: The formation of Gorgona komatiites
are ultramafic volcanic rocks that occur mainly in Archean and Paleoproterozoic greenstone belts.
Temperatures up to[?]1700-1900 K were initially derived from Galileo spacecraft data, suggesting that the magmas might be ultra-basic, similar to the komatiites
that erupted on Earth earlier in its history.