Sutures, dyke swarms and carbonatites in people’s democratic republic of Yemen

الملخص EN

The basement rocks in the Lowder-Mudiah area of the Abyan Governorate, P.D.R.Y.

(South Yemen) consist of three major lithological units.

These are, viz..

granitic gneisses, metavolcanicsand dyke swarms, with their granite diorite and gabbro host rocks, un- conformably and partly covered by Jurassic limestones and Quaternary basalts.

These three lithological units are separated by two main, northeast striking, ductile shear zones, along which sutures are believed to have taken place.

Carbonatite dykes intruded through gray granitic gneiss host rock.