ABSTRACT
Genetically linked to the Permo-Mesozoic intraplate dynamics of NE-Africa, the alkaline complexes of northern Kordofan represent an early Permian to late Jurassic province of episodic magmatic activity. This chapter investigates three alkaline complexes which cover the age spread obtained by Schandelmeier & Richter: Jebel Nehud, Jebel El Hursh, and Jebel Katul. The alkaline rocks of Jebel Nehud area occur as small individual stocks, emplaced into high grade basement rocks, and as thin dikes, intruding both the alkaline stocks and the basement. The alkaline intrusion of J. El Hursh has a NE-SW elongated, elliptical shape and occupies a surface area of approximately 35 km2. Compared to the other alkaline intrusions of northern Kordofan, which form prominent topographical elevations, J. El Hursh has a low topographic relief. The J. Katul complex occupies an area of roughly 50 km2 and forms a nearly circular shaped, but highly indentated elevation, emerging from the surrounding sand dunes and gravel fields.
