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.
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