Meteorite Phosphates Show Constant 176Lu Decay Rate Since 4557 Million Years Ago

Date

2005

Authors

Amelin, Yuri

Journal Title

Journal ISSN

Volume Title

Publisher

American Association for the Advancement of Science

Abstract

The use of radioactive decay of 176Lu to 176Hf to study the evolution of the Earth requires a precise and accurate value for the 176Lu decay constant. Recent determinations of this decay constant by age comparison to the more precisely calibrated U-Pb isotopic system produced internally consistent but discrepant values between terrestrial minerals and meteorites. New highly radiogenic Lu-Hf data for phosphate minerals from Richardton (ordinary chondrite) and Acapulco (primitive achondrite) yield decay constant values of 1.864 × 10-11 ± 0.016 × 10 -11 and 1.832 × 10-11 ± 0.029 × 10 -11 year-1, respectively, identical to the value determined from terrestrial minerals.

Description

Keywords

Keywords: Decay (organic); Earth (planet); Isotopes; Meteorites; Minerals; Phosphates; Decay constant; Decay rate; Isotopic systems; Meteorite phosphate; Radioactive elements; hafnium; hafnium 176; isotope; lead; lutetium; lutetium 176; mineral; phosphate; unclassi

Citation

Source

Science

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1126/science.1117919

Restricted until

2037-12-31