Mineralogical studies on clay and sand fractions as well as homogeneity of soils in south Tushka area, Egypt [electronic resource]
Language: English Summary language: Arabic Description: p. 107-129Other title:- دراسة معدنية لا قسام الطين والرمل وتجانس التربة في منطقة جنوب توشكي-مصر [Added title page title]
- Menuofia journal of soil science, 2020 v. 5, (June) [electronic resource].
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Main | ART MJSS V5 June 1 (Browse shelf(Opens below)) | Available |
Includes references.
The present work was carried out to study the mineralogical composition of the clay and sand fractions of some soils
located at Tushka area between Latitudes 22o 00\ and 23o 28\N, and longitudes 30o 00\ and 32o 00 E. To fulfill this objective
Landsat 8 image and digital elevation model (DEM) of the studied area were used to define the geomorphic units of the studied area.
The geomorphic units of the area under consideration could be grouped and described as Young Alluvial Plain, Old alluvial Plains,
Pedi Plain, Playa and Aeolian Plain. The different geomorphic units were represented by 26 soil profiles. The obtained results
indicate that, the studied soils are dominated by Kaolinite clay mineral followed by montmorillonite, interstratified minerals
and illites. Also, chlorite minerals are presented in variable frequency depending on the parent material of these soils.
The minerals assemblage are interpreted in terms of lithology and depositional environments. The mode of formation of the
pre-wet climatic condition is in contrast to the present aridity status. Mineralogical composition of the sand fraction showed that,
light minerals are the major component and mainly dominated by quartz which constitutes more them 89%. Feldspars are depicted with
a few amounts not exceed 11% and represented by plagioclase, orthoclase and microcline. On the other hand, heavy minerals are
dominated by opaques which constitute from 33% to 60.3%. Non-opaque minerals are dominated by pyroboles (pyroxene + Amphiboles,)
followed by very stable minerals (Zircon, rutile and tourmaline). Slightly stable minerals (garnet and epidote) and stable minerals
(staurolite, kyanite, silimanite and andalusite) are found in less pronounced amounts. The frequency distribution of very stable
minerals (Zircon, rutile and tourmaline) and weathering ratios lead to conclusion that, the studied soils are heterogeneous either
due to their multi-origin and\ or multi-depositional regimes.
Summary in Arabic.
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