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 10:56:49 -0500
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My understanding is that Mg/Ca and Sr/Ca concentration ratios have been
used for a water temperature proxy. These are easily measured with
LA-ICP-MS. I don't know any references of this being measured directly from
water samples right now, but I'm sure there's something out there. Maybe
someone else on the list knows of specific references. I could use them too.

Good Luck,


At 02:58 PM 2/2/2004 +0000, you wrote:
>Thank you very much for you rhelp. Do you know if there are any chemicals
>in the water of seas that could be used with LA-ICPMS
>  to determine water temperatures. Sr maybe? Any help is greatly
>Regards, Tighearnach
> >===== Original Message From Stable Isotope Geochemistry
><[log in to unmask]> =====
> >Hi,
> >
> >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
> >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
> >Utah) on this technique. Geochimica et Cosmochimica Acta (1996) v.60
> >p. 2909-2916 and Palaeogeography, Palaeoclimatology, Palaeoecology
> >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.
> >
> >~Penny
> >

                    Dr. Pennilyn Higgins
  Florida Laboratory for Isotopic and Environmental Research

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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