Earth Sciencesnature communications
Barium content of Archaean continental crust reveals the onset of subduction was not global
G. Huang, R. N. Mitchell, et al.
Uncover the secrets of Earth's earliest continental crust with this fascinating study by Guangyu Huang, Ross N. Mitchell, Richard M. Palin, Christopher J. Spencer, and Jinghui Guo. By analyzing Ba concentrations in Tonalite-trondhjemite-granodiorite (TTG) suites, the research reveals that only low geothermal gradients in hot subduction zones can produce Ba-rich TTGs, shedding light on the diachronous onset of subduction from 4 Ga to 2.7 Ga.
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