Dear Members,
Although I am working on heavy elements isotopes, recently, I have
been reading a little about lighter elements, and I wonder if
somebody out there can help with the following.

I came across an article where water samples are analysed for (delta)
18O to shed shed light on the origins of the water?!!

I don't know what is meant by the origins of the water, and how could
that be done from the isotopic analysis. If you could help with some
more information, I'll be grateful.

Regards
Ahmed
Dr Ahmed Ayoub
Analytical Group
Macaulay Land Use Research Institute
Craigiebuckler
Aberdeen AB15 8QH
U.K.