Salt Minerals in Saline Soils and Salt Crusts

Mees, Florias; Tursina, T. V.

doi:10.1016/b978-0-444-53156-8.00020-9

Cited by 16 publications

(11 citation statements)

References 65 publications

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“…However, the occurrence or continuation of fine-grained thenardite along the sides and base of various structures, including thin horizontal thenardite-bloedite plates, lateral extensions from surface protrusions, and the sample as a whole, indicates formation along the surface of preexisting deposits, rather than growth and sedimentation within the water column. The most likely process is replacement of bloedite by thenardite, which has only rarely been reported (Ordóñez et al, 1994), in contrast to the reverse reaction (Mees, 1999;Li et al, 2010;Mees & Tursina, 2010). The cause of the common separation between the layer and the crust is not apparent.…”

Section: Thenardite Sedimentationmentioning

confidence: 92%

“…Eugsterite is a fairly common mineral in salt efflorescences (Mees and Tursina, 2010), where it forms as a subaerial precipitate. At Mediana, a similar nonsubaqueous mode of formation is possible for the eugsterite occurrence below the crust, where it commonly contains an admixture of fine calcareous sediment and quartz grains.…”

Section: Formation Of Other Mineralsmentioning

confidence: 99%

“…Last and Ginn, 2005). Textural features of these and other subaqueous bloedite accumulations have hardly been documented, and only scattered textural data are available for bloedite occurrences as part of salt crusts on soils (Mees and Tursina, 2010). In principle, petrographical data can provide important information about various relevant aspects of salt accumulations, such as mineral precipitation mechanisms, depositional sequences, and diagenetic change.…”

Section: Introductionmentioning

confidence: 99%

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Bloedite sedimentation in a seasonally dry saline lake (Salada Mediana, Spain)

Mees¹,

Álamo²,

Herrero³

et al. 2011

Sedimentary Geology

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Salt crusts covering the surface of the Salada Mediana, a seasonally dry saline lake in northern Spain, consist predominantly of bloedite (Na 2 Mg(SO 4 ) 2 .4H 2 O). Microscopic features of the crust were investigated to understand processes of bloedite sedimentation. This study was combined with satellite and airborne observations, revealing asymmetrical concentric and parallel-linear patterns, related to wind action.

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Section: Thenardite Sedimentationmentioning

confidence: 92%

Section: Formation Of Other Mineralsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bloedite sedimentation in a seasonally dry saline lake (Salada Mediana, Spain)

Mees¹,

Álamo²,

Herrero³

et al. 2011

Sedimentary Geology

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“…We think that it would be more correct to call such a thin layer a microlayer. The degree of soil crust development depends on how long the soil surface is bare, undisturbed by agricultural practices, and on the intensity of rainfall events as well as on a number of soil properties (soil texture, salinity, SOM content, percentage of calcium carbonate, percentage of exchangeable sodium) [48,49]. Moreover, the soil crust is comprised of heterogenous soil material (residues of soil aggregates and washed soil material, as well as, in some cases, water-resistant soil aggregates) (Figure 2a).…”

Section: Study Area and Field Data Collectionmentioning

confidence: 99%

Some Peculiarities of Arable Soil Organic Matter Detection Using Optical Remote Sensing Data

Prudnikova

Savin

2021

Remote Sensing

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Optical remote sensing only provides information about the very thin surface layer of soil. Rainfall splash alters soil surface properties and its spectral reflectance. We analyzed the impact of rainfall on the success of soil organic matter (SOM) content (% by mass) detection and mapping based on optical remote sensing data. The subject of the study was the arable soils of a test field located in the Tula region (Russia), their spectral reflectance, and Sentinel-2 data. Our research demonstrated that rainfall negatively affects the accuracy of SOM predictions based on Sentinel-2 data. Depending on the average precipitation per day, the R2cv of models varied from 0.67 to 0.72, RMSEcv from 0.64 to 1.1% and RPIQ from 1.4 to 2.3. The incorporation of information on the soil surface state in the model resulted in an increase in accuracy of SOM content detection based on Sentinel-2 data: the R2cv of the models increased up to 0.78 to 0.84, the RMSEcv decreased to 0.61 to 0.71%, and the RPIQ increased to 2.1 to 2.4. Further studies are necessary to identify how the SOM content and composition of the soil surface change under the influence of rainfall for other soils, and to determine the relationships between rainfall-induced SOM changes and soil surface spectral reflectance.

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“…Soils of arid, semidesert and desert regions are characterised by the formation of surface crust, which is well studied at a macro-and micro-scale (Gerasimov 1954;Atkinson 1979;Pagliai and LaMarca 1979;Figuera 1984;Allen 1985;Bouza and Del Valle 1993;Pagliai 1994;Mees and Singer 2006;Pagliai 2008;Briggs and Morgan 2008;Dixon 2009). The crust can be formed on different substrates, both natural and technogenic (Аndrokhanov et al 2000;Gerasimova et al 2003;Goleusov and Lisetskii 2005;Fox et al 2009;Mees and Tursina 2010;Pagliai and Stoops 2010;Uzarowicz and Skiba 2011). Initial soil-forming processes on technogenic substrates, such as phosphogypsum, are the least studied topic.…”

Section: Introductionmentioning

confidence: 99%

Microdiagnostics of initial pedogenesis on a phosphogypsum dump

et al. 2018

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This paper presents the results of the study of initial pedogenesis on phosphogypsum dump rocks under dry steppe bioclimatic conditions (Balakovo, Saratov Region, Russia). It was shown that a soil crust about 3 cm thick was formed at the dump surface as a result of natural pedogenic processes over a period of 20-30 years. Such soil crusts act to cement the surface and protect the dump material from deflation and water erosion. The crust was shown to consist of two parts that can be distinguished by morphological features: an upper part (about 2 cm thick) of a more firmly bound material more grey in colour and a lower part (about 1 cm thick) with a looser consistency and lighter colour. The structural organisation is primarily determined by the presence of live roots of grasses and mosses, which is characteristic of a biogenic crust. The two parts of the crust were characterized at both macro- and micro-scales, by use of thin sections and tomographic imagery. The presence of humification features and porosity observed within the crust allowed for the diagnostics of initial pedogenesis.</p><p align="center"> </p><p align="center">

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Salt Minerals in Saline Soils and Salt Crusts

Cited by 16 publications

References 65 publications

Bloedite sedimentation in a seasonally dry saline lake (Salada Mediana, Spain)

Bloedite sedimentation in a seasonally dry saline lake (Salada Mediana, Spain)

Some Peculiarities of Arable Soil Organic Matter Detection Using Optical Remote Sensing Data

Microdiagnostics of initial pedogenesis on a phosphogypsum dump

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