>Hi Bob:

I suspect that you meant to ask me about our new ion microprobe
analyses of oxygen in zircons, including a suite of detrital zircons
from Western Australia that includes the newly discovered 4.4 Ga
crystal with a d18-O of 7.4%o. This was reported last Jan. 11 in
Nature. William Peck is a co-author and an Assistant Professor at
Colgate now. He will be attending Goldschmidt and is planning to talk
about this work. It was part of his PhD, and he and I made the
analyses together in Edinburgh. I will attend AGU, but can't go to
both meetings.

We are unsure of which session to submit William's abstract. Would it
be possible to invite William and to give him an extra 5 minutes? he
has a lot of unpublished oxygen data from these samples and can use a
bit more time in order to put them into context. If you wish to
invite him, his email is   [log in to unmask]

I'm sorry that I will miss you at the meeting.

cheers,   John

>  >Dear Everyone,
>  >        Ed Young and myself will be convening a symposium on new
>  >developments in stable isotope geochemistry at the upcoming 11th annual
>  >Goldschmidt conference ("Topical Symposium 35: Recent Advances in Stable
>  >Isotope Analysis and Interpretation").  We are attempting to bring together
>  >scientists working on innovative new analytical and theoretical approaches
>  >to the study of stable isotopes in natural materials.  Our scheduled
>  >keynote speakers span a wide spectrum of interests, from hydrogen isotopes
>  >in environmental samples to the theory of Fe isotope fractionation to O
>  >isotopes in meteorites - the common theme being that all are pushing the
>  >frontiers of how we define and apply stable isotope geochemistry.  I would
>  >like to encourage those of you with something appropriate to offer to
>  >submit an abstract to these sessions, and everyone else attending the
>  >meeting to come see the talks.
>
>John:   I will be at the meeting, giving a paper in Symposium 17
>(extraterrestrial water). I wonder whether you are interested in having a
>paper in your symposium on RIMS techniques and results on pre-solar grains.
>Strictly speaking, this is a new technique, measuring stable isotopes, but
>it is obviously not what you had in mind in creating the symposium. It also
>has no known terrestrial application, since we sometimes have 100 permil
>error bars (which is tolerable in measuring 900 permil nucleosynthetic
>effects). Please tell me frankly how you feel about this.
>                                                 Bob Clayton

.



John W. Valley, Professor              phone: 608-263-5659
Dept. of Geology and Geophysics        fax:   608-262-0693
University of Wisconsin         email: [log in to unmask]
1215 W. Dayton St.
Madison, WI 53706, USA    http://www.geology.wisc.edu/people/valley.html

Zircons Are Forever- http://www.geology.wisc.edu/zircon/zircon_home.html