Magnetic susceptibility of soil separates of Gleysolic and Chernozemic soils

2005 ◽  
Vol 85 (2) ◽  
pp. 233-244 ◽  
Author(s):  
E. de Jong ◽  
R. J. Heck ◽  
E. V. Ponomarenko
Keyword(s):  
Magnetic Susceptibility ◽  
Key Words ◽  
Sand Fraction ◽  
Extractable Iron

The major horizons of Gleysolic and Chernozemic soils and the underlying deep till of five cores were separated into sand-, silt- and clay-sized fractions. Pedogenesis increased the ranges of magnetic susceptibility (χ) and oxalate (Feo) and dithionite-citrate extractable (Fed) iron in bulk samples and size separates of the A, B and IC horizons compared to the deep till. In the A, B and IC horizons the relationships between χ of the bulk (< 2 mm diameter) soil and χ of the sand and silt fractions was much stronger than in the deep till. Generally, χ of the clay was much lower than that of the coarser fractions, whose χ was similar or slightly larger than that of the bulk samples, except for two buried, burned horizons. Treatment of the sand fraction of 15 soils with dithionite -citrate to remove pedogenic ferrimagnetics showed that the latter decreased in the order: burned, buried horizons > gleysolic and chernozemic A horizons > gleysolic B horizons > IC horizons. The low χ of the gleysolic horizons cannot be attributed to a decrease in pedogenetically formed ferrimagnetics; they must have lost part of their inherited ferrimagnetics, possibly sand-sized magnetite. Key words: Magnetic susceptibility, soil separates, extractable iron, gleysols, chernozems

Magnetic susceptibility of Gleysolic and Chernozemic soils in Saskatchewan

2002 ◽  
Vol 82 (2) ◽  
pp. 191-199 ◽  
Author(s):  
E. de Jong
Keyword(s):  
Magnetic Susceptibility ◽  
Key Words ◽  
Soil Samples ◽  
Sand Content ◽  
Poorly Drained Soils ◽  
Extractable Iron

In Saskatchewan, Gleysolic and Chernozemic soils often are found close to each other in hummocky terrain. Magnetic susceptibility (χ) is known to be reduced in poorly drained soils compared to well-drained soils, and this study investigated the use of χ as an accessory criterion for identifying Gleysols. Archived soil samples from an area near Saskatoon were analyzed for χ and sand content, and where necessary for organic and inorganic C and oxalate (Feo) and dithionite (Fed) extractable iron. The lowest χ values were found in Humic Luvic Gleysols and the highest in Dark Brown Chernozems; Rego and Orthic Gleysols and Rego Humic Gleysols had χ values that overlapped those of the Dark Brown Chernozems. Within the upper 50 cm of the profile, all Gleysols except the Rego Humic Gleysol had at least one horizon with %chi; less than 150 × 10-9m3kg-1. The χ of the A and B horizons was negatively correlated to their Feo/Fed ratios, and not correlated to their sand content. The χ of the deep tills was positively correlated to sand content, and not correlated to Feo/Fed ratio. It appears that χ may be as useful as the Feo/Fed ratio for assisting in classifying Gleysols. Key words: Magnetic susceptibility, Gleysols, Chernozems, Feo, Fed, CaCo3

Magnetic susceptibility of a saprolite and a soil profile developed on pyroxenite at Mont-Saint-Bruno, Quebec, Canada

2001 ◽  
Vol 81 (2) ◽  
pp. 185-192
Author(s):  
C R De Kimpe ◽  
J. Dejou ◽  
Y. Chevalier
Keyword(s):  
Particle Size ◽  
Magnetic Susceptibility ◽  
Chemical Composition ◽  
Key Words ◽  
Soil Profile ◽  
Additional Information ◽  
Fe Oxides ◽  
Ti Oxides ◽  
Opaque Minerals ◽  
High Magnetic Susceptibility

Magnetic susceptibility (χ) measurements were performed with a recording magnetic susceptivimeter on a pyroxenite and its alteration products, i.e., a saprolite and the horizons of a soil profile. Pyroxenite contains a relatively high percentage of opaque minerals that, under alteration, transformed partly into Fe oxides with a high magnetic susceptibility. In the saprolite and the soil, χ values varied according to depth in the profile, particle size, mineralogical and chemical composition. Significant correlations between χ values and Fe and Ti oxides indicated the importance of opaque minerals, magnetite, maghemite and ilmenite to the magnetic susceptibility of the alteration products of the pyroxenite. This method provided additional information on the intensity of the alteration of the rock, especially on the formation of secondary Fe oxides at the expense of the ferromagnesian minerals. Key words: Magnetic susceptibility, pyroxenite, saprolite, maghetite, maghemite, opaque minerals

scholarly journals Polymetallic Complexes Part LXXXXV Bis-bidentate Donor Azodye Dimeric Complexes

1970 ◽  
Vol 44 (4) ◽  
pp. 445-452 ◽  
Author(s):  
Bipin Bihari Mahapatra ◽  
Nilanchala Patel
Keyword(s):  
Magnetic Susceptibility ◽  
Key Words ◽  
Electronic Spectra ◽  
Structure Elucidation ◽  
X Ray Diffraction ◽  
Antifungal Activities ◽  
X Ray ◽  
Dimeric Complexes ◽  
Distorted Octahedral ◽  
Polymetallic Complexes

Twelve dimeric complexes of Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) with two new bis-bidentate donor azodye ligands, 4,4'-bis (2'-hydroxy-3',5'-dinitrophenylazo) diphenylsulphone and 4,4'-bis (2'-hydroxy-5'-nitrophenylazo) diphenylsulphone has been synthesized. The structure elucidation of the complexes was made basing upon analytical, conductance, magnetic susceptibility, IR, electronic spectra, ESR, NMR, and X-ray diffraction (powder pattern) data. Antifungal activities of the ligands and a few complexes were also studied. The cobalt (II) and nickel (II) complexes are found to be octahedral, copper (II) complexes are distorted octahedral and a tetrahedral stereochemistry has been suggested to Zn (II), Cd (II) and Hg (II) complexes. Key words: Polymetallic complexes; Azodye complexes; Multidentate ligands. DOI: 10.3329/bjsir.v44i4.4596 Bangladesh J. Sci. Ind. Res. 44(4), 445-452, 2009

Effects of parent material and climate on the magnetic susceptibility of Saskatchewan soils

2000 ◽  
Vol 80 (1) ◽  
pp. 135-142 ◽  
Author(s):  
E. de Jong ◽  
L. M. Kozak ◽  
H. P. W. Rostad
Keyword(s):  
Magnetic Susceptibility ◽  
Key Words ◽  
Soil Texture ◽  
Low Frequency ◽  
Parent Material ◽  
Agricultural Area ◽  
Parent Materials ◽  
Soil Zone ◽  
Magnetic Enhancement ◽  
Fe And Mn

Magnetic susceptibility (χ) of soils is easily measured; however, the link between magnetic horizonation and pedogenic factors needs to be clarified. This study compares the χ of the A and C horizons of 89 generally well-drained profiles from the agricultural area of Saskatchewan to quantify the effects of parent material and climate. Total Fe and Mn were only weakly related to χ, but χ increased as the soil texture became coarser. This trend was more noticeable in parent material than topsoil samples, and stronger for till than for fluvial, lacustrine and aeolian parent materials. The A horizon samples showed enhanced low frequency and frequency dependant χ. This increase in topsoil χ was greatest in the more humid areas. Key words: Magnetic susceptibility, parent material, climate, texture, magnetic enhancement, soil zone

MAGNETIC SUSCEPTIBILITY AND ANISOTROPY OF THE ORGANIC SUPERCONDUCTOR (TMTSF)2ClO4

1983 ◽  
Vol 44 (C3) ◽  
pp. C3-893-C3-901 ◽  
Author(s):  
M. Miljak ◽  
J. R. Cooper ◽  
K. Bechgaard
Keyword(s):  
Magnetic Susceptibility ◽  
Organic Superconductor

Magnetic susceptibility of dilute alloys of rare earths in magnesium

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-17-C5-18
Author(s):  
M. de Jong ◽  
P. Touborg ◽  
J. Bijvoet
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earths ◽  
Dilute Alloys
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