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Ali Moamen Abdelmaksoud Ahmed Essa M. A. Abdelhady A. Darwish M. 《Natural Resources Research》2020,29(4):2575-2597
Natural Resources Research - Two main reservoirs are producing in Komombo Basin: the first one belongs to the C Member of the Six Hills Formation, and the second belongs to the Albian/Cenomanian... 相似文献
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Ali Moamen Abdelhady A. Abdelmaksoud Ahmed Darwish M. Essa M. A. 《Natural Resources Research》2020,29(2):1259-1281
Natural Resources Research - The Albian/Cenomanian reservoir is one of the two main reservoirs composing the petroleum system in the Komombo Basin. However, these reservoirs have not previously... 相似文献
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Doris Sadek Ghabrial Michael Dawood Samuel Hilmy Essa Moussa 《Arabian Journal of Geosciences》2013,6(10):3635-3649
The south Solaf zone in SW Sinai comprises a metasedimentary sequence of metagraywackes intercalated with minor metavolcanic sheets, metasiltstones, meta-arenites, and calc–silicates. The metavolcanics (basalt–andesite) show high- to medium-K calc–alkaline nature. They exhibit distinctive Nb-Ta negative anomalies relative to enriched LILE, being highly similar to active continental margin lavas, but they also have the characteristics of rift-related magmatism. Magmas of similar composition are interpreted to be formed in an extensional environment and their source regions are zones of enriched subcontinental lithosphere. The metasediments are poor to moderate sorting, intercalated to the north with minor impure calcareous layers. Geochemical investigation shows that they are immature to semi-mature sediments derived from a source of mafic to felsic composition. These metasediments are chemically similar to the active continental margins and are comparable to the Feiran gneisses and metagraywackes that were deposited before 800 Ma in an extensional environment. The investigated rocks suffered LP-HT amphibolite facies metamorphism. The P-T estimates using various thermobarometric calibrations gave temperatures of 554–610 °C and pressures of 2.2–4.0 kbar. 相似文献
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Summary The relation between the air temperature and the global solar radiation, which can be conveniently represented by the three characteristics: mean, amplitude and phase lag of the first harmonic of global radiation and air temperatures. A good correlation between the air temperature and the solar radiation has been found when the phase lag between them is nearly of 30 days.With 6 Figures 相似文献
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A Least-squares Window Curves Method for Interpretation of Magnetic Anomalies Caused by Dipping Dikes 总被引：1，自引：0，他引：1
E. M. Abdelrahman E. R. Abo-Ezz K. S. Soliman T. M. El-Araby K. S. Essa 《Pure and Applied Geophysics》2007,164(5):1027-1044
We have developed a least-squares method to determine simultaneously the depth and the width of a buried thick dipping dike
from residualized magnetic data using filters of successive window lengths. The method involves using a relationship between
the depth and the half-width of the source and a combination of windowed observations. The relationship represents a family
of curves (window curves). For a fixed window length, the depth is determined for each half-width value by solving one nonlinear
equation of the form f (z) = 0 using the least-squares method. The computed depths are plotted against the width values representing a continuous curve.
The solution for the depth and the width of the buried dike is read at the common intersection of the window curves. The method
involves using a dike model convolved with the same moving average filter as applied to the observed data. As a result, this
method can be applied to residuals as well as to measured magnetic data. Procedures are also formulated to estimate the amplitude
coefficient and the index parameter. The method is applied to theoretical data with and without random errors. The validity
of the method is tested on airborne magnetic data from Canada and on a vertical component magnetic anomaly from Turkey. In
all cases examined, the model parameters obtained are in good agreement with the actual ones and with those given in the published
literature. 相似文献
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Summary In the present paper, a model for the diffusion of material from a point source in an urban atmosphere is incorporated. The
plume is assumed to have a well-defined edge at which the concentration falls to zero. The vertical wind shear is estimated
using logarithmic law, by employing most of the available techniques of stability categories. The concentrations estimated
from the model were compared favorably with the field observations of other investigators. 相似文献
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E. M. Abdelrahman H. S. Saber K. S. Essa M. A. Fouda 《Pure and Applied Geophysics》2004,161(2):399-411
We have developed a least-squares minimization approach to depth determination of a buried ore deposit from numerical horizontal gradients obtained from self-potential (SP) data using filters of successive window lengths (graticule spacings). The problem of depth determination from SP gradients has been transformed into the problem of finding a solution to a nonlinear equation of the form f(z)=0. Formulas have been derived for vertical and horizontal cylinders and spheres. Procedures are also formulated to estimate the electrical dipole moment and the polarization angle. The method is applied to synthetic data with and without random noise. Finally, the validity of the method is tested on two field examples. In both cases, the depth obtained is found to be in a very good agreement with that obtained from drilling information. 相似文献
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Summary The total cloud cover is deduced from measurements of monthly mean averages of the percent of possible sunshine duration at three locations in Egypt, Cairo, Bahtim and Sedi-Barrani stations during the period 1987–1995. This sunshine-derived total cloud cover (Cs) is compared to conventional ground-based observations of total cloud covers (Cg) made by meteorological observers. A linear relationship between the two estimates is calculated, and the difference between the two estimates as a function of Cs and Cg is fitted with a least-squares linear equation. It is found that on the average the sunshine-derived values of total cloud cover are about 7% lower than the corresponding ground-based estimated of total cloud cover. Both of these parameters are mainly used in solar radiation models and the error sources are mainly depending upon the way to describe sky cover. 相似文献
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Algal community and pollution indicators for the assessment of water quality of Ismailia canal,Egypt
Elshobary Mostafa E. Essa Dorya I. Attiah Abdullah M. Salem Zenhom E. Qi Xianghui 《Stochastic Environmental Research and Risk Assessment (SERRA)》2020,34(7):1089-1103
Stochastic Environmental Research and Risk Assessment - The phytoplankton community structure is affected by both ecological and spatial factors. Influences of these two factors on phytoplankton... 相似文献