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Organizations & People
Title: Review of isotopic abundances in extraterrestrial materials
D. Loss, Michael Wieser,
and Shigekazu Yoneda
Completion Date: 2006 - project abandoned
Extraterrestrial materials (meteorites, lunar and martian samples,
cosmic dust) have significantly different isotopic abundances compared
to terrestrial samples. These differences are caused by a number of
processes described in recent years in the PAC reports of Commission
II.1. This data is generated by a wide range of disciplines and techniques
rarely seen by the individual specialist groups in related fields.
This project will:
- increase the awareness of the wider scientific community
of the very large variation of the isotopic compositions and atomic
weights of the elements in extra-terrestrial materials and their impact
on analysis of these materials.
- provide scientific specialists with an interest
and need for extraterrestrial isotopic data with a flexible and comprehensive
compilation of this data including a review of production mechanisms
The Subcommittee of Non-Terrestrial Isotopic Abundances has collected
over 1,300 references on isotopic abundance variation in a variety
of extraterrestrial materials. Since a complete review of all this
data is a major undertaking this project will focus on reviewing the
differences for two major groups of elements: Rare Earth Elements
and Noble Gases for which there is extensive data available. The Task
Group will produce a comprehensive review and summary of isotope effects
and a systematic analysis of their causes. With such a large number
of data being generated in recent times, a comprehensive review is
not available. A workshop will be required to discuss the review and
refine the format for the presentation of this data.
Last Update: 8 September 2006
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Page last modified 8 September 2006.
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