University Publications

The present study has been carried out on the low-grade rocks of Neoproterozoic age with well developed shear zones and syn- late orogenic granitic, such as scattered exposures of metasediments (chlorite schist, graphite schist, quartzite, marble), metavolcanic (meta-basalt) and associated rocks (iron formation, quartz veins, pigmatite) which distributed in the area around J. Addali in the southwestern part of Sennar State - central Sudan. Tectonically, the study area lies at the junction point between the Arabian-Nubian Shield and Mozambique Belt. The region was studied for mineralogy, textures, alteration assemblages and geochemistry to assess their potential elements mineralization of Au, Ag, Cu, Pb, Co, Mn, Cr, Zn, Ni and Fe. The methodology adopted in this study include geological, geochemical and geostatistical mapping of above elements using grid sampling method supported by digital image processing and interpretation of remotely sensed data. A total of 177 chip samples of rock units were collected from different locations in the study area for petrographical, geochemical and geostatistical studies using polarized microscope, Atomic Absorption Spectrometry (AAS) and Statistical computer program. In addition to 156 samples of quartz veins for gold dissemination. All rock samples have been collectively statistically manipulated due to similar origin, age, and environment, excluding the quartz veins which treated separately. Fifteen metal mineralization zones has been discovered in new mineralize structures as the result of geostatistical interpretation of geochemical dataset of the study area, they are required a sequential exploration programs including detailed mapping, geophysical investigation and drilling. Mineralization of the above elements in the area can be classified as shear zone related, which is formed during the final event accomplished by crustal cooling, and deformation of the low-grade basement rocks