Extinct 244 Pu in Ancient Zircons-Reference-Cited by-同舟云学术

Extinct 244 Pu in Ancient Zircons

Published:2004-10 Issue:5693 Volume:306 Page:89-91
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Turner Grenville¹²³⁴,Harrison T. Mark¹²³⁴,Holland Greg¹²³⁴,Mojzsis Stephen J.¹²³⁴,Gilmour Jamie¹²³⁴

Affiliation:

1. Department of Earth Sciences, University of Manchester, Manchester M13 9PL, UK.

2. Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia.

3. Department of Earth and Space Sciences and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095, USA.

4. Department of Geological Sciences, Center for Astrobiology, University of Colorado, Boulder, CO 80309–0399, USA.

Abstract

We have found evidence, in the form of fissiogenic xenon isotopes, for in situ decay of 244 Pu 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, 244 Pu 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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