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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Diagenesis of Calcite Cement in Frio Formation Sandstones and its Relationship to Formation Water Chemistry
F. Leo Lynch, Lynton S. Land
ABSTRACT
The d18O of burial-diagenetic calcite becomes depleted with depth. Chemical and textural evidence favors partial dissolution and reprecipitation (recrystallization) with consequent isotopic resetting as being responsible for the change in calcite d18O with progressive burial. The change in calcite 87Sr/86Sr with depth also supports progressive recrystallization of calcite.
There is a strong relationship between the 87Sr86Sr
and trace element composition of calcite and formation water from individual
growth-fault blocks. Significant differences in strontium isotopic and
trace element composition exist between adjacent fault blocks, implying
that each fault block has behaved as a chemically separate system since
the time of calcite precipitation.
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