Stable Isotope Geochemistry


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Penny Higgins <[log in to unmask]>
Reply To:
Stable Isotope Geochemistry <[log in to unmask]>
Mon, 2 Feb 2004 09:40:08 -0500
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I am working on a similar problem right now. I can tell you that it is
tricky to get oxygen isotope ratios with LA-ICP-MS. I think it may
eventually be done, but the proper ICP equipment does not yet exist (so far
as I know).

One technique that has been tried in the past is LA-GC-IRMS. Read papers by
Zachary Sharp (University of New Mexico) and Thure Cerling (University of
Utah) on this technique. Geochimica et Cosmochimica Acta (1996) v.60 n.15
p. 2909-2916 and Palaeogeography, Palaeoclimatology, Palaeoecology (1996)
v.26 p. 173-186

Another technique is IRM-GC-MS published by Alison Jones, Paola Iacumin and
Edward Young. Chemical Geology (1999) v. 153 p. 241-248.

I hope this helps you.


At 01:32 PM 2/2/2004 +0000, you wrote:
>Perhaps get in touch with Dr. Hywel Evans (University of Plymouth, UK;
>- I seem to remember that Plymouth have done laser ablation ICP-MS on fish
>scales in the past .. or he may know a man who can.
>At 12:42 02/02/2004 +0000, you wrote:
>>Dear all,
>>I am a student in fourht year Zoology and am currently engaged in a
>>project studying albacore tuna migrations. I am hoping to use laser
>>ablation to study oxygen isotopes of their dorsal spines. They lay down
>>incremental layers in these spines every year in the same fashion as a
>>tree. I am hoping to determine water temperatures for different years and
>>thus showing that they are moveing around a great deal.
>>Howevr i have not got the first clue when it comes to laser ablation, how it
>>really works, how i would analyse my results, what my results would look
>>like plus a thousand pther unknowns about it.
>>I am appealing to anyone who might know of any good material out there i
>>could read that would give me a good start on the subject. The material i
>>have read to date has been a little too much too soon for me to digest.
>>Anyone out there involved in any studies comparable to mine, i would
>>appreciate any help or criticism you might have to offer.
>>Kind regards,
>                    Dr. Pennilyn Higgins
>  Florida Laboratory for Isotopic and Environmental Research
>                           "FLIER"
>Florida Museum of Natural History       Department of Geology
>University of Florida                   University of Florida
>Dickinson Hall                                Williamson Hall
>PO Box 117800                                   PO Box 112120
>Gainesville FL 32611-7800           Gainesville FL 32611-2120
>(352) 392-1721 x251 (office)
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