Ingasana Mafic-Ultramafic Complex, Blue Nile, Sudani

Regional Level Types
Ingasana Mafic-Ultramafic Complex	Complex
Blue Nile	State
Sudan	Country

The outcropping rocks are predominantly composed of intrusive ultramafic rocks. They are adorned with verdant vegetation and overhang the neighboring plains. The medium–low metamorphic Neoproterozoic sedimentary rocks and metavolcanic rocks make up the western and central parts of the study area. Meanwhile, the eastern and southern outcrops comprise newer Neoproterozoic metasedimentary rocks. These geological formations can be categorized chronologically from older to younger. Deformed highly Serpentinite chromitiferous ultramafic units at the base are covered by accumulations of mafic–ultramafic rocks, including large gabbros with granites, as well as massive and sheeted dolerite dykes, with minor highly altered basaltic pillow lava being dominated in the area. The chromite deposits belong to the Alpine type and are present in dunite and harzburgite as the country rocks. In the study area, the predominant form of ore deposits is lenticular or vein-shaped, although there are also bedded deposits of low-grade banded ore present. The geological map of the study area displays a variety of rock units with different ages and lithology. The rocks consist primarily of serpentinites resulting from intrusion, with some sections being highly silicified. One enormous intruded massif comprises Bau granite.

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

References