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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Diagenesis of Pre-Quaternary Carbonates as Indicated by Tracer Studies
Jan Veizer
ABSTRACT
Tracer (Sr and 
18O) studies on 170 carbonate rocks indicate that diagenetic transformation of the metastable into a stable carbonate assemblage involves a partially closed wet chemical system. If the assumptions about present-day counterparts of Mesozoic facies are correct, the following tracer redistribution is indicated: (1) calcite is relatively stable and the decrease in Sr is 
5 
and the 18O negative shift is 
0-2.5
; (2) aragonite and Mg-calcites ar
reprecipitated with varying efficiency as autochthonous calcite, which results in 10 Sr decrease and 18O negative shift of 1-5. Strontium content of dolomites decreases with geologic age, because of reduction in available lattice positions due to the Fe substitution.
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