Dear Urumu,

Check: Spangenberg and Macko, 1998. Organic geochemistry of the San Vicente
zinc-lead district, eastern Pucara basin, Peru. Chemical Geology, 146,
1-23.
and references therein.
Hope this help.

Cheers, Jorge

>Dear all,
>
>We are looking for d15N data of coal. Any related information on the matter
>will be appreciated.
>
>Cheers,
>Urumu
>
>
>
>--------------------------------------------
>Urumu Tsunogai, Ph. D
>Lecturer
>Dept. Environ. Science & Technology, IGSSE
>Tokyo Institute of Technology
>4259 Nagatsuta-cho, Midori-ku,
>Yokohama 226-8502, Japan
>Tel. +81-45-924-5585
>Fax. +81-45-924-5518
>E-mail [log in to unmask]
>---------------------------------------------

---------------------------------------------------------------
Dr. Jorge E. Spangenberg
Stable Isotopes Laboratory
Institute of Mineralogy and Petrography
BFSH 2
University of Lausanne
CH 1015 Lausanne
Switzerland

Tel +41 21 692 4365 (office)  692 4300 (secr.)  803 6242 (home)
Fax +41 21 692 4305
E mail [log in to unmask]