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Guera Massif

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Simplified geologic map of central Chad showing outcrop area of the Ouaddaï...
Published: 01 June 2021
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.
Image
Representative rock types from the study area. ( a ) and ( b ) Undeformed m...
Published: 01 June 2021
Figure 5. Representative rock types from the study area. ( a ) and ( b ) Undeformed megacrystic granite with large plagioclase phenocrysts from the base of the prominent inselberg Pic du Guéra (1613 m), Guéra Massif. ( c ) and ( d ) Undeformed granites with variably sized plagioclase phenocrysts
Journal Article
Published: 01 June 2021
South African Journal of Geology (2021) 124 (2): 353–382.
...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. ...
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Journal Article
Published: 01 June 2021
South African Journal of Geology (2021) 124 (2): 383–390.
... 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...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 30 June 2020
Lithosphere (2020) 2020 (1): 8825465.
... ]. The uniqueness of the Blair River inlier relative to the peri-Gondwanan terranes (i.e., Avalon, Gander, and Meguma) in the northern Appalachians suggests that it may represent a fragment of Laurentian basement and that the Red River anorthosite is interpreted to be correlative with Proterozoic massif-type...
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Journal Article
Published: 24 November 2020
Bulletin de la Société Géologique de France (2020) 191 (1): 34.
... 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 inherited ∼ 1 Ga cores have also been found ( Shellnutt et al. , 2017...
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Journal Article
Journal: Geophysics
Published: 29 September 2021
Geophysics (2021) 86 (6): B369–B388.
..., 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 for samples from the Guéra massif and basement rocks of the Doba Basin of southern Chad ( Shellnutt et al., 2017 ). The same publication attempted to give a timing...
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Journal Article
Published: 06 May 2015
Geological Magazine (2015) 152 (6): 1073–1084.
... rocks. The Precambrian rocks are found 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...
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Journal Article
Published: 19 August 2021
Mineralogical Magazine (2021) 85 (5): 784–807.
...-feldspar granites of the Mandira Granite Massif, in the post-collisional A-type Graciosa Province, S-SE Brazil. Magmatic calcic (ferro-ferri-hornblende and hastingsite) amphiboles occur in the metaluminous syenogranites, whereas calcic (ferro-edenite), sodic–calcic (ferro-ferri-winchite) and sodic...
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Journal Article
Journal: SEG Discovery
Published: 01 July 2009
SEG Discovery (2009) (78): 1–64.