Hi everybody,

I am trying to estimate the influences on the isotope composition of
Ca-rich rhodochrosites from the central Baltic (salinity around 12 PSU).
The O-isotope composition is affected by several factors, among them
dissloved SO4-delta18O and organic matter-delta18O.

I have tried to find some suitable data on the oxygen isotope composition
of the two, sulphate brackish waters (estuaries, fjords, and especially the
Baltic Sea) and organic matter in euxinic sediments, but I have not been
very successful.

Does anybody have a concrete idea where to search or whom to adress to
best? Or are there any recent publications on that matter which I for some
reason did not notice?

Thanks for any help, Uwe

  Uwe Heiser

  Institut fuer Petrographie und Geochemie (IPG)
  Universitaet Karlsruhe
  Kaiserstr. 12
  76128 Karlsruhe

  Tel. +49 721 608 3327 (or -/6375)
  Fax: +49 721 608 7247
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