Sm-Nd age of Kambalda and Kanowna greenstones and heterogeneity in the Archaen mantle

Details Sm-Nd age of Kambalda and Kanowna greenstones and heterogeneity in the Archaen mantle Sm-Nd age of Kambalda and Kanowna greenstones and heterogeneity in the Archaen mantle

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.294..322m&link_type=abstract

Nature, vol. 294, Nov. 26, 1981, p. 322-327.

Physics

27

Earth Mantle, Neodymium, Radioactive Age Determination, Radioactive Isotopes, Samarium, Volcanology, Abundance, Australia, Chondrites, Geochronology, Planetary Evolution

Scientific paper

A precise Sm-Nd age of 2,790 + or - 30 million years and an initial ratio corresponding to a value of epsilon sub Nd equal to +3.4 + or - 0.6 has been determined for the Kambalda sequence from the eastern Yilgarn Block of Western Australia. The high initial (Nd-143)/(Nd-144) implies a long-lived light rare-earth element-depleted (high Sm/Nd) source for the Kambalda volcanics and therefore provides definitive evidence for ancient heterogeneities in the Archaen mantle.

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