TY - JOUR
T1 - Rubidium isotopes in primitive chondrites: constraints on Earth's volatile element depletion and lead isotope evolution
AU - Nebel, O.
AU - Mezger, K.
AU - van Westrenen, W.
PY - 2011
Y1 - 2011
N2 - The bulk silicate Earth (BSE) shows substantial deficits in volatile elements compared to CI-chondrites and solar abundances. These deficits could be caused by pre-accretionary depletion in the solar nebula during condensation of solids, or by later heat-driven evaporation during collision of small bodies that later accreted to form the Earth. The latter is considered to result in isotope fractionation for elements with low condensation temperatures that correlates with the degree of depletion. Here, we report first high-precision isotope ratio measurements of the moderately volatile and lithophile trace element Rb. Data from seventeen chondrite meteorites show that their Rb isotope abundances are nearly indistinguishable from Earth, not deviating more than 1 per mil in their
AB - The bulk silicate Earth (BSE) shows substantial deficits in volatile elements compared to CI-chondrites and solar abundances. These deficits could be caused by pre-accretionary depletion in the solar nebula during condensation of solids, or by later heat-driven evaporation during collision of small bodies that later accreted to form the Earth. The latter is considered to result in isotope fractionation for elements with low condensation temperatures that correlates with the degree of depletion. Here, we report first high-precision isotope ratio measurements of the moderately volatile and lithophile trace element Rb. Data from seventeen chondrite meteorites show that their Rb isotope abundances are nearly indistinguishable from Earth, not deviating more than 1 per mil in their
U2 - 10.1016/j.epsl.2011.03.009
DO - 10.1016/j.epsl.2011.03.009
M3 - Article
SN - 0012-821X
VL - 2011
SP - 309
EP - 316
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
IS - 305
ER -