Resumo

ASFAHANI, Jamal. Geoelectrical combined sounding-profiling configuration for characterizing the sedimentary phosphatic environment in Al-sharquieh deposits mine in Syria. Geofís. Intl [online]. 2018, vol.57, n.3, pp.189-203. ISSN 2954-436X.

Geoelectrical combined sounding-profiling configuration is adapted and proposed in this research for characterizing the sedimentary phosphatic environment in Al-Sharquieh deposit mine in Syria. The electrode C in the proposed three-electrode array is not fixed at the infinity, but is slightly modified and movable, where OA=OB=OC=AB/2. The gradient transformation is also modified to take into account the slight geometry modification of the three-electrode array. The paper shows different useful ways for representing the acquired resistivity data resulting from using such an adapted configuration. The conventional apparent traditional resistivity measurements ρAB have a poor resolution as compared with the gradient transformation, which shows in all the analyzed examples high resolution in all directions. Gradient transformation is moreover very sensible to the vertical boundaries of lithological variations, to the fractured and faulted zones, and can be therefore used as a qualitative helpful tool for interpreting traditional Vertical Electrical Sounding (VES) data. A maximum of geoelectical information can be gained when ρAB, gradient transformation, and ρAC/ ρBC are integrally interpreted as presented in this paper. The lithological variations of the sedimentary phosphatic environment in Al-Sharquieh deposit mine are characterized by using the proposed three-electrode array. Its efficient use can be advised in different applications in mineral and structural explorations.

Palavras-chave : Combined Sounding-Profiling Configuration; VES; Phosphate; Al-Sharquieh Mine; Syria.

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