Abstract: IUGG19-3754 The Mineral Exploration of the Gold-Copper ore Deposits in the South Eastern Desert, Egypt (original) (raw)

A20a - Geophysical Survey Technology for Mining Exploration Abstract: IUGG19-3754 The Mineral Exploration of the Gold-Copper ore Deposits in the South Eastern Desert, Egypt M. Mekkawi1 1National Research Institute of Astronomy and Geophysics NRIAG, Geomagnetism and Geoelectricity, Cairo, Egypt The gold and copper mines are located in the south Eastern Desert, Egypt, about 180 km far from Aswan city and are known as volcano-tectonic area. It is one of the biggest arc sedimentary rock units in the Precambrian sequence. It was strongly influenced by multiple stage of deformation resulting in folding and faulting. A number of important ancient gold and copper mines in the area have, however, received relatively little geological attention. Several mines occurrences (El-Haimur, Abu Swayel, Um El-Garayat, Nile Velley concessions and Kolt Um El-Garayat) are confined to E-W fold and thrust belts stacked ophiolitic slices, NW-vergent folding and thrusting, with concomitant magmatic activity. The magnetic measurements are carried out along the mines where the gold and copper ore bodies are concentered. Several geoelectrical profiles were measurements by using dipole-dipole configuration of electrode spacing 5, 10 and 15 m of lengths ranging from 160-240 m. In additional to 145 time domain electromagnetic soundings are applied around old mines. The results indicate that the ore deposits are accomplished with sulfide zones which refer to low resistive zones, high chargeability with moderate to high magnetic anomalies. Key words: South Eastern Desert, Alter mineralized zone, Land magnetic, Electrical and Electromagnetic methods.