12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Extinct 244Pu from ancient zircons
View graph of relations

« Back

Extinct 244Pu from ancient zircons

Research output: Contribution to journalJournal article

Published

  • Grenville Turner
  • T. Mark Harrison
  • Greg Holland
  • Stephen J. Mojzsis
  • Jamie Gilmour
Journal publication date1/10/2004
JournalScience
Journal number5693
Volume306
Number of pages3
Pages89-91
Original languageEnglish

Abstract

We have found evidence, in the form of fissiogenic xenon isotopes, for in situ decay of 244Pu in individual 4.1- to 4.2-billion-year-old zircons from the Jack Hills region of Western Australia. Because of its short half-life, 82 million years, 244Pu was extinct within 600 million years of Earth's formation. Detrital zircons are the only known relics to have survived from this period, and a study of their Pu geochemistry will allow us to date ancient metamorphic events and determine the terrestrial Pu/U ratio for comparison with the solar ratio.