Skip to Main content Skip to Navigation
New interface
Journal articles

Half-life and initial Solar System abundance of 146 Sm determined from the oldest andesitic meteorite

Abstract : Significance 146 Sm- 142 Nd radioactive systematics can provide constraints on the timing of early differentiation processes on Earth, Moon, and Mars. The uncertainties related to the initial abundance and half-life of the extinct isotope 146 Sm impede the interpretation of the 146 Sm- 142 Nd systematics of planetary materials. The accurate determinations of Sm, Nd, and Mg isotopic compositions of the oldest “andesitic” achondrite Erg Chech 002 (EC 002) define a crystallization age of 1.8 Myr after the formation of the Solar System and provide the most accurate and reliable initial ratio of 146 Sm/ 144 Sm for the Solar System at 0.00840 ± 0.00032 using a 146 Sm half-life of 103 Ma, making EC 002 an anchor for 146 Sm- 142 Nd systematics for Earth and planetary materials.
Document type :
Journal articles
Complete list of metadata

https://hal-univ-paris.archives-ouvertes.fr/hal-03671608
Contributor : Equipe HAL Université Paris Cité Connect in order to contact the contributor
Submitted on : Wednesday, May 18, 2022 - 3:32:37 PM
Last modification on : Tuesday, December 6, 2022 - 11:10:07 AM

Links full text

Identifiers

Collections

Citation

Linru Fang, Paul Frossard, Maud Boyet, Audrey Bouvier, Jean-Alix Barrat, et al.. Half-life and initial Solar System abundance of 146 Sm determined from the oldest andesitic meteorite. Proceedings of the National Academy of Sciences of the United States of America, 2022, 119 (12), ⟨10.1073/pnas.2120933119⟩. ⟨hal-03671608⟩

Share

Metrics

Record views

21