A comparison of grain-size analysis methods for sand-dominated fluvial sediments

Michael D. Cheetham, Annabelle F. Keene, Richard T. Bush, Leigh A. Sullivan, Wayne D. Erskine

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Grain-size distribution is a fundamental tool for interpreting sedimentary units within depositional systems. The techniques assessed in this study are commonly used to determine grain-size distributions for sand-dominated sediments. However, the degree of consistency and differences in interpretation when using a combination of grain-size methods have not yet been assessed systematically for sand-dominated fluvial sediments. Results obtained from laser diffraction, X-ray attenuation and scanning electron microscopy grain-size analysis techniques were compared with those obtained from the traditional sieve/ hydrometer method. Scanning electron microscopy was shown to provide an inaccurate quantitative analysis of grain-size distributions because of difficulties in obtaining representative samples for examination. The X-ray attenuation method is unsuitable for sand-dominated sediments because of its upper size range of only 300 μm. The consistently strong correlation between the laser diffraction results and the sieve/ hydrometer results shows that these methods are comparable for sand-dominated fluvial sediments. Provided that sample preparation is consistent, the latter two methods can be used together within a study of such sediments while maintaining a high degree of accuracy. These results indicate that data for sand-dominated fluvial sediments gained from the long-established sieve/hydrometer method can be compared with confidence to those obtained by modern studies using laser diffraction techniques.

Original languageEnglish
Pages (from-to)1905-1913
Number of pages9
JournalSedimentology
Volume55
Issue number6
DOIs
Publication statusPublished - 2008
Externally publishedYes

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