Barium Isotopes in Chondritic Meteorites: Implications for Planetary Reservoir Models
- 3 November 2006
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 314 (5800), 809-812
- https://doi.org/10.1126/science.1132595
Abstract
High-precision barium isotope measurements yielded differences of up to 25 parts per million in the 137 Ba/ 136 Ba ratio and 60 parts per million in the 138 Ba/ 136 Ba ratio between chondrites and Earth. These differences probably arose from incomplete mixing of nucleosynthetic material in the solar nebula. Chondritic meteorites have a slight excess of supernova-derived material as compared to Earth, demonstrating that the solar nebula was not perfectly homogenized upon formation.Keywords
This publication has 15 references indexed in Scilit:
- 142 Nd Evidence for Early (>4.53 Ga) Global Differentiation of the Silicate EarthScience, 2005
- Nucleosynthetic components of the early solar system inferred from Ba isotopic compositions in carbonaceous chondritesEarth and Planetary Science Letters, 2003
- Diverse supernova sources of pre-solar material inferred from molybdenum isotopes in meteoritesNature, 2002
- Isotopic search for live 135Cs in the early solar system and possibility of 135Cs–135Ba chronometerEarth and Planetary Science Letters, 2001
- Molybdenum and Zirconium Isotopes from a Supernova Neutron BurstThe Astrophysical Journal, 2000
- Evidence from coupled 147Sm–143Nd and 146Sm–142Nd systematics for very early (4.5-Gyr) differentiation of the Earth's mantleNature, 1992
- S-process Ba, Nd, and SM in presolar SiC from the Murchison meteoriteThe Astrophysical Journal, 1991
- S-process krypton of variable isotopic composition in the Murchison meteoriteNature, 1988
- Barium and neodymium isotopic anomalies in the Allende meteoriteThe Astrophysical Journal, 1978
- A classification of meteorites based on oxygen isotopesEarth and Planetary Science Letters, 1976