排序方式： 共有17条查询结果，搜索用时 15 毫秒
1.
Aissa Wiem Ben Aissa Lassaâd Ben Amara Abdesslem Ben Haj Tlig Said Alouani Rabah 《International Journal of Earth Sciences》2017,106(8):2653-2665
International Journal of Earth Sciences - Hydrothermal ore deposits at Aïn El Araâr-Oued Belif location are classified as epithermal deposits type. The ore bodies are hosted by upper... 相似文献
2.
Taha Rabeh 《Environmental Earth Sciences》2013,70(4):1539-1550
In this work, we present a reconnaissance study to elucidate and delineate subsurface fault structures for an active tectonics area that lies between Cairo and El Fayoum provinces and consider major sources of seismicity in Egypt. Well logging, aeromagnetic, land magnetic, and magnetotelluric data have been used. The well-logging data were used for several drilled wells along W–E direction. The magnetic data were analyzed using trend analysis, 3D magnetic modeling, and Werner deconvolution techniques. The magnetotelluric data were interpreted using 2D (TM–TE) modeling techniques. The results show that there are eight major fault structures having E–W, N–S, and NW–SE directions. These faults extend downward for about 20 km at the Dahshour and Qatrani areas. The epicenter sources of the earthquakes are clustering around the intersections of these structures. The Kattaniya horst structure has been interpreted as a regional structure that exceeds the limits previously determined by geologists. The depth to this horst reaches about 1.8 km at the NW and more than 4.3 km at the southern parts. The interpreted values of magnetic susceptibility at the horst zone indicate that they are ultrabasic/basic intrusion bodies. 相似文献
3.
Mohamed Arfaoui Mohamed Hdi Inoubli Saïd Tlig Rabeh Alouani 《Geophysical Prospecting》2011,59(3):576-591
Triassic outcrops in the Atlassic zone of northern Tunisia may be modelled in two ways: salt bodies piercing through Cretaceous terrains or Triassic salt flows stratified within an Albian series. Both models find support from gravity data and are debatable. To evaluate the mass distribution changes with depth, the Bouguer anomaly of the El Kef‐Ouargha region was successively decomposed into regional and residual components to construct multiple pseudo‐depth slices and apparent density maps. Analyses of gravity lows clearly show a vertical continuity of less dense materials below the Triassic salt outcrops. These features can be explained by salt diapirism during Mesozoic and Cenozoic. Further, gravity data tend to indicate less dense materials below Aptian outcropping in Jebel Aite (Oued Bou Adila); thus suggesting Triassic materials occurring at depth. In addition, dense entities were recognized under Mio‐Pliocene and Quaternary deposits, which are thought to correspond to Cretaceous paleoshoals currently collapsed by non‐outcropping faults. Our findings lend support to a diapir model intruding overburden rather than the salt glacier model stratified in the Albian series proposed by some authors as the genetic structural model for Triassic material‐bearing series in the north of Tunisia. 相似文献
4.
Fathallah Alouani Bibi James Binney Katherine Blundell Henrik Omma 《Astrophysics and Space Science》2007,311(1-3):317-321
We analyzed the feedback of AGN jets on cooling flow clusters using three-dimensional AMR hydrodynamic simulations. We studied
the interaction of the jet with the intracluster medium and creation of low X-ray emission cavities (Bubbles) in cluster plasma.
The distribution of energy input by the jet into the system was quantified in its different forms, i.e. internal, kinetic
and potential. We find that the energy associated with the bubbles, (pV+γ
pV/(γ−1)), accounts for less than 10 percent of the jet energy. 相似文献
5.
Comparison of ordinary kriging and artificial neural network for spatial mapping of arsenic contamination of groundwater 总被引：3，自引：2，他引：1
Mohammad Chowdhury Ali Alouani Faisal Hossain 《Stochastic Environmental Research and Risk Assessment (SERRA)》2010,24(1):1-7
In this technical note, we investigate the hypothesis that ‘non-linearity matters in the spatial mapping of complex patterns of groundwater arsenic contamination’. The spatial mapping pertained to data-driven techniques of spatial interpolation based on sampling data at finite locations.
Using the well known example of extensive groundwater contamination by arsenic in Bangladesh, we find that the use of a highly
non-linear pattern learning technique in the form of an artificial neural network (ANN) can yield more accurate results under
the same set of constraints when compared to the ordinary kriging method. One ANN and a variogram model were used to represent
the spatial structure of arsenic contamination for the whole country. The probability for successful detection of a well as
safe or unsafe was found to be atleast 15% larger than that by kriging under the country-wide scenario. The probability of
false hopes, which is a serious issue in public health monitoring was found to be significantly lower (by more than 10%) than
that by kriging. 相似文献
6.
Taha Rabeh Jorge Miguel Miranda Joao Carvalho Andrei Bocin 《Geophysical Prospecting》2009,57(3):447-459
The study area is located in the Sinai Peninsula, which is considered one of the most promising regions for oil resources. Three different tectonic forces affect the area in the triple junction structures associated with the opening of the Gulf of Suez and the strike slip movement along the Gulf of Aqaba. The main goal of this work is to model the structure of the basement rocks in the study area using magnetic methods. To achieve this, a high-resolution land magnetic survey was acquired and the results were combined with existing seismic reflection data. The magnetic interpretation was carried out using the analytical signal, horizontal gradient, Euler and Werner deconvolution and 3D magnetic modelling methods. We concluded that most of the deduced structures are trending in N–S, N35°–N45° west and E–W directions. The Aqaba trend (N15°–N25° east) is barely noticeable. The depth to the basement rocks ranges from 1 km to more than 2 km below sea level and these results are in agreement with the available well log data. In addition, interpretation of seismic reflection sections was carried out and compared with overlapping magnetic profiles interpreted using Euler deconvolution. They show that the sedimentary section was affected by the basement tectonics, with faults extending from the basement upwards through the sedimentary cover. These faults constitute good potential structural traps for oil accumulation. 相似文献
7.
Taha Rabeh Joao Carvalho Ahmed Khalil Esmat A. El-Aal Ibrahim El-Hemaly 《Acta Geophysica》2011,59(5):1044-1056
When the solar irradiance propagates between the outer magnetospheric regions and the ionosphere, dynamic processes of the
magnetosphere-ionosphere-thermosphere system are affected at the lower end of their paths by the interaction of radiation
with the neutral troposphere. The main target of this work is to investigate the relationship between the diurnal magnetic
field variations resulting from solar activities and the variation in the troposphere temperature. Meteorological and geomagnetic
data acquired from different observatories located in Egypt, Portugal and Slovakia in a long-term and daily-term scales were
analyzed. 相似文献
8.
9.
10.
Tectonic model of Egypt based on magnetic analysis 总被引：1，自引：0，他引：1
The main target of this work was to study the dynamics of the Earth’s crust for Egypt based on the magnetic survey. High-resolution
land magnetic data were analyzed, combined with the results of GPS and seismic stress analyses.
The constructed tectonic map shows that the N35°-N45°W trend of the structure (related to the Red Sea and Gulf of Suez tectonics)
predominates along the Gulf of Suez, Red Sea, covering wide parts of the study area. The N45°-N65°E tectonic trend (related
to the Syrian Arc tectonics), prevailing in the northern part of Egypt, is of the second rank. The Aqaba (N15°-25°E) and E-W
trends prevail in the northern part and along the transition zone of stable/unstable shelves. The depth to the basement rocks
ranges from the surface along the Red Sea and southern parts of Egypt to more than 4 km below sea level at the northern part
of the study area. 相似文献