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| EPXMA survey of shelf sediments (Southern Bight, North Sea): A glance beyond the XRD-invisible De Maeyer-Worobiec, A.; Dekov, V.M.; Laane, R.W.P.M.; Van Grieken, R. (2009). EPXMA survey of shelf sediments (Southern Bight, North Sea): A glance beyond the XRD-invisible. Microchemical journal 91(1): 21-31. dx.doi.org/10.1016/j.microc.2008.07.001
In: Microchemical journal. ISSN 0026-265X; e-ISSN 1095-9149, meer
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ANE, Noordzee, Zuidelijke Bocht [Marine Regions] Marien/Kust |
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| Abstract |
However, the EPXMA has several flaws, which need to be solved in the future sediment investigations: (1) calibration with natural standards is needed in order to provide a higher accuracy of the mineral determinations; (2) any EPXMA study of sediments needs to be secured with XRF examinations of selected samples since EPXMA gives only semi-quantitative information about the abundance of the elements; (3) ultra-thin window EPXMA of low-Z elements has to be used since some of them (O, C) are always present in the main sediment components: silicates, aluminosilicates, carbonates and metal oxyhydroxides; (4) the interpretations of the clay fraction have to be supported with detailed XRD investigations of selected samples, while the mineralogy of the silt and sand fractions needs to be backed up with optical microscopy studies. The information from different analytical techniques (EPXMA with XRF–XRD-optical microscopy of selected samples) combined with the knowledge about the most possible minerals in a given environment, would give the most reliable results in studying mineralogical composition of shelf sediments. |
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