On the origin of some red soils from Sardinia (Italy): A neutron activation analysis investigation
- 72 Downloads
In Sardinia, the Italian island in the middle of the MediterraneanSea, there are many red soils developed on limestone or dolomite. Soil andunderlying bedrock samples from 5 different sites have been submitted to chemicaland mineralogical characterization, by using standard X-ray diffraction analysis,spectrochemical methods and instrumental neutron activation analysis. Obtainedresults are presented and discussed in terms of precision and accuracy. Traceelement concentration variation with depth is discussed as well as the enrichment/depletionratios between soils and rocks, and the rare-earth element distribution. Dataanalysis suggests for some soils a formation process based on the evolutionof the underlying bedrock, and for the other soils a formation process partlybased on the evolution of the local rock but with meaningful contributionsof external sources, both eolian and/or alluvial.
KeywordsDolomite Diffraction Analysis Formation Process Neutron Activation Analysis Instrumental Neutron Activation Analysis
Unable to display preview. Download preview PDF.
- 1.FAO-UNESCO, Soil map of the world, FAO, Roma, 1974.Google Scholar
- 3.P. Melis,A. Premoli,P. Baldaccini, Studi Sass., 34 (1992) 151.Google Scholar
- 4.P. Melis,M. Oddone,S. Meloni, Studi Sass., 35 (1993) 255.Google Scholar
- 6.Italian Society for Soil Science, Metodi normalizzati di analisi del suolo, Edagricola, Bologna, 1985.Google Scholar
- 7.R. Basso,A. Mazzucotelli, Per. Mineralogia-Roma, 44 (1975) 5.Google Scholar
- 8.National Bureau of Standards, Certificate of Analysis SRM 1633a “Trace Elements in Coal FlyAsh”, Gaithersburg, MD (USA), 1985.Google Scholar
- 10.H. L. Rollinson, Using Geochemical Data: Evaluation, Presentation, Interpretation, Longman, Harlow (UK), 1993.Google Scholar