(جامعة النيلين, 2017) Siddig M. Elzien; Eman K.D. Sayed; Omar A.O. Al-Imam; Hamed B.O. Hamed; Mohammed A.H. Altigani; Khalid M. Kheiralla
Abstract
Ingassana Hills Complex composed of greatly weathered rocks forming clays and laterite. Chemical analyses show a depletion
of high soluble elements such as Si4+, K+, Na+, Ca2+, Mg2+, Fe2+ etc., and enrichment of Al3+, Fe3+, Ti4+, H2O+ etc., in their
weathering products . Silica, potassium and others, beside the formation of economic mineral deposits like gold, pyrite, and
chalcopyrite were present within the shear zone in the area. Soil profiles have shown gain of ferric iron, titanium and alumina
and other most resistant elements on progressive weathering. The meager light minerals are quartz and feldspar and the
magnetic and nonmagnetic are distributed in different percentages such as chromite (20%-75%), galena (9%-70%), pyrite
(10%-20%), hematite (10%-40%), copper (5%-20%) associated with zircon, gold, chalcopyrite, tourmaline, cinnabar and talc.
