Statistical Chronometry: Anchors Away!

Desch S. J., Dunlap D. R., Williams C. D., Torrano Z. A.

84th Annual Meeting of The Meteoritical Society 2021 (abstract # 6231)


We fit 4 parameters (CAI Pb-Pb ages; solar system initial 53Mn/55Mn, 182Hf/180Hf; 53Mn half-life) and make concordant 30 ages (Al-Mg, Mn-Cr, Hf-W, Pb-Pb) across 10 achondrites. CAIs formed 4568.61 ± 0.26 Myr ago, D’Orbigny 5.05 ± 0.03 Myr later.