Ground Electromagnetic and Electric Studies for Um Salim Gold Mine, Central Eastern Desert, Egypt

Mohamed A. El-Sadek,Ibrahim M. M. Al-Alfy,Mostafa A. M. Zaeimah,Hussein F. Abd El Salam

doi:10.4236/gep.2021.98008

Mohamed A. El-Sadek, Ibrahim M. M. Al-Alfy + Show 2 more

Open Access

https://doi.org/10.4236/gep.2021.98008

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Abstract

Horizontal Loop Electromagnetic (HLEM) and Induced Polarization (IP) methods have been carried out within Um Salim gold mine area. The study area reveals special importance, as it comprises rock units, which show some indication of the presence of various mineralization. The result of HLEM has shown significant and well-defined conductive zones are recorded along with the four used frequencies (110 Hz, 440 Hz, 1760 Hz, and 7040 Hz) at the station 2,782,900 and station 2,782,880 of two (HLEM) profiles (596,050 N & 596,240 N) respectively, that may reflect the sources of the conductive bodies are situated at shallow depths continued to considerable depths. The result of IP exhibits a strong anomalous zone centered at stations 140 and 240, with chargeability values ranging (37 to more than 120 mV/V) on chargeability model section, and corresponding to high resistivity on resistivity model section which may reflect considerable surface and subsurface disseminated mineralization. Through the integration between HLEM and IP a core drilling is recommended at station 140 on IP profile which coincides with station 2,782,850 on HLEM profile (596,240 N) to a depth of concerning 100m take a look at the thickness, depth, and grade of mineralization.

Highlights

Through the integration between Horizontal Loop Electromagnetic (HLEM) and Induced Polarization (IP) a core drilling is recommended at station 140 on IP profile which coincides with station 2,782,850 on HLEM profile (596,240 N) to a depth of concerning 100m take a look at the thickness, depth, and grade of mineralization
Um Salim area is situated in the central eastern desert of Egypt (Figure 1)
Vestigation reveals a special importance, as it comprises rock units, which show some indication of the presence of various mineralization as detected by the previous geological, geochemical, and geophysical studies (Klemm et al, 2001)

Summary

Introduction

Um Salim area is situated in the central eastern desert of Egypt (Figure 1). It is situated between longitudes ̊53'E and ̊00'E and latitudes 25 ̊08'N and 25 ̊11'N, and approximates eighty-four km in surface area. (El-Sadek, 2009) studied Um Salim gold mine using airborne spectrometric and magnetic data. He conducted that, Um Salim gold mine is related to terribly with very low aero-radio spectrometric levels and the location of the gold deposit is related to cross fault dominance (NE and NW). Horizontal Loop Electromagnetic (HLEM) and Induced Polarization (IP) methods were selected to study southwest anomaly in order to: 1) Follow the exposed surface mineralization at deeper depths and obtain information about the probable lateral and vertical extensions; 2) Integrated interpretation of the various geophysical results in collaboration with the available pre-existing information guided the exploratory drilling operations in the studied area

Geologic Setting

Methodology

Data Reduction and Presentation

Quantitative Interpretation of HLEM Data