Isotopic composition of sulfur from sulfates in loess sediments of the North Caucasus and adjacent regions as an indicator of the genesis of salts

Isotopic composition of sulfur from sulfates in loess sediments of the North Caucasus region was studied. It proved to be very homogenous within the vertical soil-loess sequences and in the lateral direction: the d super(34)S values in the studied samples varied from 7.8 to 8.3ppt. The origin of sul...

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Bibliographic Details
Published in:Eurasian soil science 2007-04, Vol.40 (4), p.380-389
Main Authors: Ryskov, YaG, Oleinik, SA, Ryskova, E A, Morgun, E G
Format: Article
Language:English
Subjects:
Geochemistry
Isotopes
Loess
Salt
Sediments
Soil surfaces
Soils
Sulfates
Sulfur
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Summary:Isotopic composition of sulfur from sulfates in loess sediments of the North Caucasus region was studied. It proved to be very homogenous within the vertical soil-loess sequences and in the lateral direction: the d super(34)S values in the studied samples varied from 7.8 to 8.3ppt. The origin of sulfates in the soil-loess sequences is related to their deposition from different sources in solonchaks of the Black Sea-Caspian region with further mixing of sulfur and its eolian transport toward the areas of loess deposition. The gypsiferous horizons of studied soils were formed under the impact of the eluvial-illuvial redistribution of salts deposited from the atmosphere onto the soil surface.
ISSN:1064-2293
1556-195X
DOI:10.1134/S1064229307040035