Volume 12, Issue 46 (1-2009)
jwss 2009, 12(46): 773-788 |
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Owliaie H, Adhami E, Chakerhosseini M, Rajaee M, Kasraian A. Evaluation of Magnetic Susceptibility Source Using CBD Treatment and Micro CT-Scan Images in Some Soils of Fars Province. jwss 2009; 12 (46) :773-788
URL: http://jstnar.iut.ac.ir/article-1-1158-en.html
URL: http://jstnar.iut.ac.ir/article-1-1158-en.html
, owliaie@mail.yu.ac.ir
Abstract: (19601 Views)
Magnetic susceptibility (χ) measurements are widely used for the evaluation of soil profile development. Fourteen soil profiles were studied in a relatively wide range of climatic conditions in Fars Province. Citrate-bicarbonate-dithionite (CBD) extraction and micro CT-Scan images were used to evaluate the source of magnetic susceptibility. The results showed that soil samples lost 23 to 91 percent of their magnetic susceptibility after CBD extraction (χCBD), reflecting differences in the source (pedogenic or lithogenic) of magnetic susceptibility. Greater values of the decrease were noticed mostly in well developed soil profiles as well as in soil surface. 22 to 89% of the decrease was observed in frequency dependence of magnetic susceptibility (χfd) after CBD extraction. A significant positive correlation (P<0.01) was obtained between χCBD and χfd in the soil studied. Micro CT-Scan images with a spatial resolution of 33 µm showed lithogenic magnetic Fe oxide (magnetite) grains.
Keywords: Soil magnetic susceptibility, Soil development, Fe Oxides, Pedogenic, Micro CT-Scan, Fars Province.
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