The Gulf of Suez region represents the most promising area in Egypt for geothermal exploration which is characterized by superficial thermal manifestations represented by a cluster of hot springs with varying temperatures from 35 to 72°C. The main purpose of the present study was to shed the light on the integration between gravity work and geothermal data in detecting the main subsurface structures in addition to expecting the geothermal sources in the area under consideration. Correction was applied on the bottom hole temperature data to obtain the true formation equilibrium temperatures that can provide useful information about the subsurface thermal regime. Based on these logging data, temperature gradient and heat flow values were computed at each well, and it is found that the mean geothermal gradient of the study area is 32°C/km; nevertheless, some local geothermal potential fields were located with more than 40°C/km. Also, heat flow values are ranging from 45 to 115 mW/m 2. The Bouguer anomaly map of the study area was used for delineating the subsurface structures and tectonic trends that have resulted in a potential heat source. The gravity inversion revealed a good correlation between areas of high temperature gradients, high heat flow and positive gravity anomalies. The high temperature gradient and heat flow values suggested being associated with a noticeable hydrothermal source of heat anomaly located at relatively shallow depths which is expected to be due to the uplift of the basement in the area.
The serious need and high demand of iron oxides in cement industry urges to carry out critical investigation in vicinity of cement factories in South Egypt Governorates. The considered area Wadi Abu Subeira lies to the north east of Aswan. The possible occurrences of hematite in the subsurface enforced to carry out some geophysical measurements in the in the form of very low frequency-electromagnetic and geoelectrical resistivity. A total number of 684 very low frequency-electromagnetic and 54 vertical electrical soundings stations were executed along 9 surveying profiles arranged on three long traverses, running from west to east direction. The data sets were comprehensively and steadily inverted/transformed in terms of subsurface electric resistivity/EMequivalent current-density. Both the vertical and lateral resistivity/current-density variations were able to image the typical shallow stratigraphic sequence of the area. The present study emphasized the robustness and costefficiency of applying the very low frequency-electromagnetic and geoelectrical resistivity techniques in a field like iron ore exploration.
Tushka area represents the South East Western Desert, Egypt. its contain many drilled wells which have many problems during use, so the present study aims at identify the aquifer conditions and its relation with surface water and subsurface structure in addition to determine the aquifer thickness by using the basement relief from previous work, then assess the current situation of the drilled water wells. Geoelectrical data were measured, processed and interpreted in one, two and three dimensions using special Equipments and software.The interpretation results demonstrated that two types of groundwater aquifers (confined and unconfined) are present in the study area. The confined aquifer is located at the south of Khor Tushka and the unconfined aquifer is found in the north of Khor Tushka, where the last one is charged from Lake Nasser and Khor Tushka. The groundwater aquifers thicknesses are up to 440 m and the area is affected by normal faults of NW-SE and NE-SW trends. The study showed that there is no connection between the confined aquifer and the shallow overlaying aquifer. The confined aquifer is charged partially from the lake Nasser and Khor Tushka through specific areas under the capping layers of Nubian sandstone filled with hydrothermal solution and shale.
Clay is considered one of the most important raw materials in cement industry. It is the most common rich source of silica and alumina. During the quarrying process a few months later, a new feature of water accumulation appeared on the quarry floor and many water pools were formed during excavation process. In order to detect the source and extension of the groundwater seepage, geoelectrical resistivity technique in the form of vertical electrical soundings was applied. Fifteen vertical electrical soundings with AB/2 from 1 to 150 m have been executed. Geoelectrical resistivity measurements are applied in Helwan clay quarry to understand the source of the groundwater accumulated recently on the floor of quarry. The results indicate the passage of groundwater from the adjacent areas through channel ways formed as a result of the excavation process. All over the measured area, there are some sand lenses intercalated with clays & during the excavation process, some channels formed and the groundwater started to percolate through these channels forming many water pools along the quarry floor. 2. Geological setting Geologically, the Helwan clay quarry, the exposed rocks consist of Pliocene conglomeratic sands, sandstone and gravels (Fig. 2). These Pliocene sediments belong to the Nile Valley sediments consist of a
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