Application of the resistivity/gravity joint inversion technique for Nubian sandstone aquifer assessment on the area located at the central part of Sinai, Egypt

作者：Sultan S A^*; Monteiro Santos F A; Abd Alla M A; Mekhemer H M

来源：Journal of Geophysics and Engineering, 2010, 7(1): 1-15.

DOI：10.1088/1742-2132/7/1/001

• electrical resistivity
• gravity
• groundwater
• joint inversion
• Egypt

Eleven deep vertical electrical soundings of AB/2 spacing ranging from 5 to 3000 m were carried out to investigate the upper part of the Nubian groundwater aquifer at the central part of Sinai, Egypt. These soundings have been jointly inverted using the SA algorithm with 160 gravity stations measured in the study area, assuming that density and resistivity contrast are represented by coincident interfaces. One hundred and sixty magnetic stations were executed at the same locations as gravity measurements to estimate the depth of basement rocks. The results of the joint interpretation indicated that the depth of the groundwater aquifer ranges from 500 to 800 m with resistivity values ranging from 6 to 562 Omega m, suggesting that the fresh water is of good quality towards the northern part of the area. The top of the basement, which is mainly defined by gravity and magnetic data, lies at a depth ranging from 830 to 2788 m. The results also show that the aquifer configuration is controlled by different regional faults in the NNW-SSE direction.

• 出版日期2010-3-11