Consolidation-related fabric changes of periplatform sediments |
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| Authors: | Richard Rezak Dawn L Lavoie |
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| Institution: | (1) Department of Oceanography, Texas A&M University, 77843 College Station, TX, USA;(2) Naval Ocean Research and Development Activity, Stennis Space Center, 39529, MS, USA |
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| Abstract: | Geotechnical properties of carbonate sediments result from several factors such as the particular constituents comprising
the sediment, the mineralogy, fabric, and effective stress. Investigating the effects of increasing effective stress by mechanical
consolidation using permeability, porosity, and porometry determinations reveals fabric changes that could not be determined
in scanning electron micrographs. Porometry changes, determined using an image analyzer, are a function of matrix composition
and grain support. Samples that were predominantly matrix-supported exhibited an increase in pore numbers per unit area and
a pore size decrease resulting from consolidation. Samples composed predominantly of aragonite needle matrices displayed opposite
behavior. |
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