Abstract
Relevance and purpose of the work. The study area is located in Gedarif state in Sudan. The ongoing work is aimed at solving fundamental problems of the geological structure of the Qala En Nahal-Um Saqata Ophiolitic Complex and applied tasks of mineral exploration. Detailed studies are being conducted for the first time in this area. The purpose of the investigation is to study the geological and structural features of the region, as well as to obtain information about the localization of gold mineralization. Methods of research. Within the study area, a geological mapping of the ophiolitic complex was carried out. It’s included an analysis of structural elements for investigation of the structural evolution and the phases of deformation. Chemical analysis of the mineralized quartz veins to determine the gold was carried out by Atomic Absorption Spectrometry (AAS) technique at the ALS Laboratory in Saudi Arabia. Results of the work. The investigation of the structural evolution revealed at least three phases of deformation. The gold mineralization occurs in auriferous quartz veins, which are hosted in metavocano-sedimentary, sheared synorogenic granites and listvenites. The auriferous quartz veins are structurally controlled by dominantly NE main shear directions. Conclusions. The gold mineralization in the area can be classified shear zone related mineralization, which is formed during the final event accomplished by crustal cooling, and formation of auriferous quartz vein along shear zones. Gold concentration were recorded in both quartz veins and associates alteration rocks. The area is promising for the presence of a gold deposit.
Highlights
The study area is located some 70 km to the southeast of the Gedarif city, Gedarif State, in eastern Sudan near the border line between the Sudan and Ethiopia, between latitudes 13°15′ and 13°43′ N and longitudes 34°45′ and 35°15′ E (Fig. 1)
The gold mineralization occurs in auriferous quartz veins, which are hosted in metavolcano-sedimentary, sheared syn-orogenic granites and hydrothermally altered serpentinites
The gold mineralization in the study area can be classified shear zone related mineralization, which is formed during the final event accomplished by crustal cooling, and formation of auriferous quarz veins along shear zones
Summary
The study area is located some 70 km to the southeast of the Gedarif city, Gedarif State, in eastern Sudan near the border line between the Sudan and Ethiopia, between latitudes 13°15′ and 13°43′ N and longitudes 34°45′ and 35°15′ E (Fig. 1). It lies about 65 km to Gadarif town, 450 km SE Khartoum. The area is part of Nubian Shield, a relatively under exploration that is known to host variable minerals including gold, Nickel, chrome and PGM. In the study are a numerous artisanal mining and mining companies at exploration stage are working. The aim of this study are to document the geology and structure of the area and gain insight into the setting and the nature of its hosted gold mineralization
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