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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)


Journal of Sedimentary Petrology
Vol. 43 (1973)No. 1. (March), Pages 287-290

Changes in Clay Mineral Assemblages by Sampler Type

Frederic R. Siegel, J. W. Pierce


Clay mineral contents of samples of Recent marine sediments from the Golfo San Matias, Argentina, taken as piston cores, gravity cores, and grab samples, show values which differ according to the type of sampler used. Averages for the components of the clay mineral assemblages are similar for the piston core and grab sample groups, whereas those for the Phleger samples are significantly different. Regional (or local) comparisons of semi-quantified clay mineral distributions in Recent marine environments can be made with confidence only if the same type sampling device has been used to extract the bottom sediments. If comparisons must be made between the clay mineralogy of samples obtained with different equipment, it appears that, at least for this area, the data from grab and piston ore samples may be treated together.

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