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| Titel |
Soil characterization using patterns of magnetic susceptibility versus effective radium concentration |
| VerfasserIn |
F. Girault, C. Poitou, F. Perrier, B. P. Koirala, M. Bhattarai |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 8 ; Nr. 11, no. 8 (2011-08-23), S.2285-2293 |
| Datensatznummer |
250009627
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| Publikation (Nr.) |
 copernicus.org/nhess-11-2285-2011.pdf |
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| Zusammenfassung |
| Low-field magnetic susceptibility χm and effective radium concentration
ECRa, obtained from radon emanation, have been measured in the laboratory
with 129 soil samples from Nepal. Samples along horizontal profiles in slope
debris or terrace scarps showed rather homogeneous values of both χm and
ECRa. One sample set, collected vertically on a lateritic terrace
scarp, had homogeneous values of ECRa while χm increased by a factor of 1 to
10 for residual soils and topsoils. However, for a set of samples collected
on three imbricated river terraces, values of ECRa, homogeneous over a
given terrace, displayed a gradual increase from younger to older terraces.
By contrast, χm showed more homogeneous mean values over the three
terraces, with a larger dispersion, however, for the younger one. Similarly,
Kathmandu sediments exhibited a large increase in ECRa from sand to clay
layers, while χm increased moderately. The combination of χm and ECRa,
thus, provides a novel tool to characterize quantitatively various soil
groups and may be of interest to distinguish modes of alteration or
deposition histories. |
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