...Figure 3. Simplified geologic map of central Chad showing outcrop area of the Ouaddaï (Darfur) and Guéra massifs, with locations of samples described in this paper. ...

... of geochronology and isotope geochemistry, is that the central Sahara region is a large, coherent craton that was ‘highly remobilized’ during the Late Neoproterozoic amalgamation of Gondwana and referred to as the Saharan Metacraton. However, new data from the Guéra, Ouaddaï, and Mayo Kebbi massifs and the Lake...

... , 62 ]. The tectonomagmatic dichotomy is difficult to reconcile. However, compositionally similar rocks to the metagabbro are known to occur in postcollisional settings. The Late Ediacaran (~580 Ma) Kekem (Cameroon) and Guéra Massif (Chad) gabbros have low SiO 2 (45.7 to 51.0 wt%) and high TiO 2...

... the regional Pan-African deformation event, the oldest ages most probably represent inherited cores while the lowermost Cambrian age reflects igneous crystallization. A late Ediacaran igneous activity is known in the CAfOB and especially in the neighboring Guera Massif ( Shellnutt et al. , 2019 ) where...

... lithospheric fracture zones ( Wilson et al., 1998 ). The Chad Basin is touched at its border by four major Precambrian massifs: the Mayo-Kebbi in the southwest, the Guéra in the south-center, the Quaddaï in the east, and the Tibesti in the north (Figure  1a and 1b ). Geochronology has been obtained...

... in the Tibesti Mountains north of N’Djamena, the Ouddai Massif at the eastern border and central areas of Chad, the Guera Massif in the centre and the Yade and Mayo Kebbi massifs in the south ( Fig. 2 a). The Tibesti, Ouddai and Guerra massifs and other pre-Neoproterozoic blocks of North...

... collisional and post-collisional granites from the Guéra Massif, South-Central Chad . Frontiers in Earth Science , 8 , 1 – 17 . Piilonen P.C. , McDonald A.M. , Poirier G. , Rowe R. and Larsen A.O. ( 2013 ) Mafic minerals of the alkaline pegmatites in the Larvik plutonic...

... artisanal dia- Centamin has been exploring for gold Oil accounts for ~90% of exports. Gov- monds, especially from Baibokoum at the Sukari Hill gold project near ernment is seeking to develop mining and Guera. Marsa Alam on the Red Sea coast. and suggested it might buy diamonds Production is expected...