MICROTEXTURE AND MINERAL CHEMISTRY OF MANGANESE ORE

The mineralized area is a part of ancient failed rift including a basaltic belt extended across Central Sudan passing through Thetis Atlantis-II and Valdivia deeps of the Red Sea and on to the Jeddah and El-Riyadh cities in Saudi-Arabia. A scanning electron microscope with an X-ray microprobe attachment was used for detailed analysis of coexisting mineral chemistry. Micro textural analysis for thermal features indicated crystallization from boiling solution (hyaloclastic and colloform microtextured); simple cooling (diablastic); replacement (pseudomorphs) and alteration and fissure filling (Nematobiastic).