Hey Tim, I don't know if you have already been suggested but there is also this work by Pagani et al., Science, 22 July 2005, 309, 600-603, where a drop in paleoatmospheric concentration of CO2 during Paleogene was estimated by using d13C of C37:2 alkenone (together with d18O of coeval carbonates and [PO43-] throughout the top 100 m of ocean water).

Cheers,

Paolo Angelo Abballe
PhD candidate
School of Earth and Environmental Sciences
University of Wollongong
Wollongong NSW 2522 Australia 
Room 41.154: 02 4221 3426
Cell: 0408228147


---- Original message ----
>Date: Thu, 23 Aug 2007 11:51:59 +0100
>From: "Heaton, Timothy HE" <[log in to unmask]>  
>Subject: [ISOGEOCHEM] Isotope changes in marine organic carbon  
>To: [log in to unmask]
>
>   Does anyone know of any recent reviews on carbon
>   isotope changes of marine ORGANIC carbon through
>   geological time? Especially studies that relate
>   marine orgainc d13C to atmospheric CO2 changes.
>
>   Tim H.E. Heaton
>
>   NERC Isotope Geosciences Laboratory
>   British Geological Survey
>   Keyworth, Nottingham NG12 5GG, England
>   (www.bgs.ac.uk/nigl/index.htm)
>
>   Tel. +44(0)115 936 3401
>   Email: [log in to unmask]
>
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