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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Effects of Differential Cementation on the Sonic Velocities of Upper Cretaceous Skeletal Grainstones (Southeastern Netherlands)
Jeroen A. M. Kenter, Bruce W. Fouke, Marc Reinders
ABSTRACT
Comparison between carbonate grainstones and siliciclastic sandstones
reveals that: (1) the grainstones have gradients in velocity-porosity space
similar to those in siliciclastic arenites but have velocities that are
up to 0.3 km/s higher than those in clean arenites and up to 0.8 km/s higher
than in argillaceous arenites; and (2) grainstones develop a rigid framework
that transports elastic waves at significantly higher porosities than arenites,
40-50% compared to 30-40%. Higher sonic velocity presumably results from
the higher matrix velocity of calcite versus quartz, and the higher elastic
moduli created by the effective cement bridges connecting grains.
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