Coupled 142Nd-143Nd Isotopic Evidence for Hadean Mantle Dynamics

• Published in: Science
• Main Authors: Bennett, Victoria, Brandon, Alan D, Nutman, Allen P
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: American Association for the Advancement of Science
• Subjects: Keywords: isotope; neodymium; neodymium 142; neodymium 143; samarium; unclassified drug; chondrite; Hadean; heterogeneity; mantle chemistry; silicate; temporal variation; article; astronomy; Australia; dynamics; geochemistry; Greenland; half life time; m
• Online Access: http://hdl.handle.net/1885/26972; https://doi.org/10.1126/science.1145928; https://openresearch-repository.anu.edu.au/bitstream/1885/26972/5/V.Bennett_et_al_Science_2007.pdf.jpg; https://openresearch-repository.anu.edu.au/bitstream/1885/26972/7/01_Bennett_Coupled_142Nd-143Nd_Isotopic_2007.pdf.jpg

The oldest rocks - 3.85 billion years old - from southwest Greenland have coupled neodymium-142 excesses (from decay of now-extinct samarium-146; half-life, 103 million years) and neodymium-143 excesses (from decay of samarium-147; half-life, 106 billion