G'day Ahmed,

I'd recommend the following... and Northern hemisphere out soon!

A. Bollhöfer and K. J. R. Rosman
Isotopic source signatures for atmospheric lead: the Southern Hemisphere
Geochimica et Cosmochimica Acta, Volume 64, Issue 19, 1 October 2000, Pages
3251-3262





At 09:33 26/02/01 +0000, you wrote:
>Hi Out There
>
>I remember, through reading a book, a paper, material on the net or
>through discussion with others, coming across a principle upon which
>you may be able to tell if this Pb had came from a specific region.
>The isotopic ratio of lead can be an indication of where this Pb
>originated from, Australia, the US or other mining ores. However, I
>cannot find a reference on this. If you can expand on this subject or
>know of a reference about it, I would be grateful.
>
>Many thanks
>Ahmed
>Dr Ahmed Ayoub
>Analytical Group
>Macaulay Land Use Research Institute
>Craigiebuckler
>Aberdeen AB15 8QH
>U.K.



<> Graeme Burton
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<> TIMS Laboratory
<> Centre of Excellence in Mass Spectrometry
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