Dear Mr. Cevik:

in this paper you find a Sr/Sr isotope curve from 35 Ma to the Recent and its application to chronology and environment analysis of marine strata:

DILL, H.G. and HENJES-KUNST, F. (2007) Strontium (87Sr/ 86Sr) - and calcium (44Ca/ 40Ca -44Ca/ 42Ca) isotope ratios of the Miocene Dam Formation in Qatar:

Tools for stratigraphic correlation and environment analysis.- GeoArabia, 12: 61-76.

Kind regards

H.G.Dill

Mr. Harald G. Dill thanks a lot for your information and attention.

have a nice and healty and happy day.

See McArthur & Howarth (2004). It is the fundamental reference for Strontium isotope stratigraphy.

Thanks a lot Mr. Cesare Andrea Papazzoni .

See also:

McArthur, J.M., Howarth, R.J. & Shields, G.A. (2012): Strontium isotope

stratigraphy. In: Gradstein, F.M., Ogg, J.G., Schmitz, M.D. & Ogg, G.M.

(eds.): The Geologic Time Scale 2012 Vol. 1. - Elsevier, 127-144.

Thanks a lor Mr. Jürg Wegmüller

Thanks a lot Mr. Jürg Wegmüller and Mr. Rabah Kechiched