Fig. 4
Estimated mantle concentrations (upper panel) and radiogenic heat output (lower panel) of 40K,232Th, 235U, and 238U in an α-Cen-Earth as a function of the system age. The wedge around each curve represents the uncertainties of the estimates over time. The solid and dashed vertical lines indicate the current age (6 ± 1 Ga; Morel 2018) of the α Cen AB system.
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