Jebel Nehud (Jebel Nahd, Er Rihani And Es Rihani, Ubal En Nahud)

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Occurrence number:

155-00-058

Country:

Sudan

Location:

Longitude: 29.92, Latitude: 14.85

Carbonatite:

This poorly known complex consists of Jebel Nehud North, Jebel Nehud South, which are some 6 km apart, and Jebel Nehus Southwest, also known as Nus, several kilometres to the southwest of Jebel Nehud South. They consist of quartz syenites, and possibly granites, containing sodic pyroxenes or amphiboles; gabbros occur in Nehud South and Nus. However, few petrographic details are available.

Age:

Whole rock Rb-Sr determinations (18 samples) gave isochron ages in the range 270-280 Ma for the Northern, Southern and Southwest occurrences (Hohndorf et al., 1994). K-Ar determinations on mineral separates ranged between276 and 282 Ma (Muller-Sohnius and Horn, 1994).

References:

HOHNDORF, A., MEINHOLD, K-D. and VAIL, J.R. 1994. Geochronology of anorogenic igneous complexes in the Sudan: isotopic investigations in North Kordofan, the Nubian Desert and the Red Sea Hills. Journal of African Earth Sciences, 19: 3-15.MULLER-SOHNIUS, D and HORN, P. 1994. K-Ar dating of ring complexes and fault systems in Northern Kordofan, Sudan: evidence for independent magmatic and tectonic activity. Geologische Rundschau, 83: 604-13.

Location:

All locations > Africa > Sudan

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