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Mineralogical composition of coarse and fine fractions and their indicators in soil at some Wadis in southern Sinai, Egypt
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Abstract: The aim of current study necessitates an increasing precise knowledge of the mineralogical characteristics of the soil material for some Wadis located in Sinai
The quartz generally constitutes more than 86 % from light minerals of the 0.063-0.125 mm fraction in the studied soil profiles. Also, The muscovite content are less than 3.0 % from light minerals. The vertical distribution shows minute variations of muscovite content throughout profile layers in all studied soils. Calcite mineral show relative concentration in the surface layers of some studied profiles and deep layers of others.
Frequency distribution of heavy minerals for studied profiles indicate that opaque, pyroboles and ultrastable are the most abundant minerals. Metamorphic minerals (as a total) are present in relatively moderate amounts. The remaining minerals are found in less pronounced amounts. The values of non-opaque minerals group are ranged between 53.79 and 63.68 from total heavy fraction.
The ratios of resistant minerals have different values in majority profiles representing studied soils in wadis. The differences are relative clear between the layers of the some profiles, which indicate the stratification of these profiles.
The majority-studied profiles are considered young from the pedological point of view, as the pyroboles rather than the ultrastable minerals. Also distribution of resistant minerals and weathering ratios leads to soils located in Wadi Gharandal and some layers of soils located in other studied wadis are relative weathered due to the action of rainfall in winter seasons.
Semi quantitative determination of clay minerals indicate that Kaolinite is higher and predominated in examined samples of El-Murr, Wardan and Gharandal soils. Chlorite is found by different amounts in soils of Wardan and El-Murr wadis by 20.71–35.75 %and 0.31 – 2.05% respectively. Smectite and Vermiculite minerals are present by few amounts in Wardan and Gharandal soils.Illite is found in about 0.74 – 1.22% and 4.14 – 12.66% in El-Murr and Wardan soils, respectively. Palygorskite mineral is present by trace amounts in all examined samples. The other associated and accessory minerals, i.e. quartz, feldspars, gypsum, dolomite and calcite are also detected in all examined samples by different amounts for each sample
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| Publication year |
2003
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| Pages |
1717-1731
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| Availability location |
Soils, Water and Environment Research Institute, ARC, 9 Cairo Univ. St., Giza, Egypt
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| Availability number |
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| Organization Name |
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| City |
Shibin El-Kom
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| serial title |
Minufiya Journal of Agricultural Research
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| ISSN |
1110-0265
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| Author(s) from ARC |
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| External authors (outside ARC) |
عمر عبد العزيز جبران
كلية الزراعة بشبين الكوم – جامعة المنوفية
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| Agris Categories |
Soil classification and genesis
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AGROVOC
TERMS |
Clay minerals.
Egypt.
Kaolinite.
Mineralogy.
Smectites.
Soil sciences.
Vermiculites.
Weathering.
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| Publication Type |
Journal
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