Hello
I have to quickly add some corrections before you guts point it out. We
measured  delta 13 C and not 23C
The orgainc carbon is -12 per mil and not -112 per mil.
Sorry for the errors.
Regards
Sundaram Iyer



On Fri, 2 May 1997, Sundaram Iyer wrote:

> 
> Hello
> We obtained highly enriched delta 23 C values for Neoproterozoic
> carbonates ( up to +18 per mil) and associated organic matter ( up to +
> -112 per mil) from the Bambui group, Brazil ( Precambrian Research, 73,
> 271-282.) I wonder it is of any help.
> Regards
> Sundaram S. Iyer
> 
> 
> 
> 
> On Fri, 2 May 1997, glen martin wrote:
> 
> > 
> > GJ
> > 
> > I have seen values in the + 9 to +20 o/oo delta C13 range for some
> > sediment carbonate (fresh water), but not as positive as +25 o/oo.
> > Another laboratory has confirmed some of our data. 
> > 
> > >From a terse literature research, I did not find any values as 
> > positive as these. Discussion from the group would be appreciated, 
> > with literature references citing such positive delta C13 values.
> > 
> > Thank you, in advance.
> > 
> > Glen Martin, Water Sciences Laboratory, 103 NRH, Univ.of Nebraska
> > Lincoln, NE 68583-0844 USA\
> > [log in to unmask]
> > 
> > > Does anyone know of a carbon-containing material with a del13C of plus25 to
> > > 30permil? We have isolated a white evaporation deposit from a rock surface
> > > (within a study of rock painting) with this odd value..
> > > 
> > > Thanks very much, GJ
> > > ---------------------------------------
> > > Dr. Gert Jaap ("GJ") van Klinken,
> > > Radiocarbon Accelerator Unit,
> > > Research Laboratory for Archaeology and the History of Art,
> > > University of Oxford
> > > 6 Keble Road, Oxford OX1 3QJ
> > > Tel (+44) (01865) 273939   Fax (01865) 273932
> > > 
> > > 
> > 
> > 
> 
>