Tagabo Hills

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Occurrence number:

155-00-064

Country:

Sudan

Location:

Longitude: 25.83, Latitude: 14.58

Carbonatite:

The Tagabo Hills comprise numerous small outcrops of igneous rocks extending over an area of 70x20 km (Pudlo and Franz, 1991). They are remnants of flows and plugs and aerial photographs indicate that dykes are the feeder sources for many of the flows (Franz et al., 1994). Jebel Teljo, the largest mountain of the Tagabo Hills, is a large dyke-like structure of phonolite. The rocks are chemically bimodal (Franz et al., 1994) consisting essentially of basanite + tephrite and phonolite + nepheline normative trachyte.

Age:

K-Ar determinations on eight samples of phonolite, hawaiite and basanite ranged from 10.6 to 16.5 Ma (Franz et al., 1994).

References:

FRANZ, G., PUDLO, D., URLACHER, G., HAUSMANN, U., BOVEN, A. and WEMMER, K. 1994. The Darfur Dome, western Sudan: the product of a subcontinental mantle plume. Geologische Rundschau, 83: 614-23.PUDLO, D. and FRANZ, G. 1991. Volcanism of the Tagabo Hills, W Sudan: petrology and geochemistry of a bimodal basanite-phonolite rock suite. Terra Abstracts, 3: 430-31.

Map:

Fig. 3_287 The relative positions of the Marra Mountains, Jebel Kussa, Mellit, the Tagabo Hills and the Meidob Hills (based on 1:2,000,000 scale geological map in Vail, 1978).

Location:

All locations > Africa > Sudan

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