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1-12 OF 12 RESULTS FOR
Guera Massif
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Image
Simplified geologic map of central Chad showing outcrop area of the Ouaddaï... Available to Purchase
in Geochemical reconnaissance of the Guéra and Ouaddaï Massifs in Chad: evolution of Proterozoic crust in the Central Sahara Shield
> South African Journal of Geology
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... Available to Purchase
in Geochemical reconnaissance of the Guéra and Ouaddaï Massifs in Chad: evolution of Proterozoic crust in the Central Sahara Shield
> South African Journal of Geology
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
Geochemical reconnaissance of the Guéra and Ouaddaï Massifs in Chad: evolution of Proterozoic crust in the Central Sahara Shield Available to Purchase
M.J. de Wit, S. Bowring, R. Buchwaldt, F.Ö. Dudas, D. MacPhee, G. Tagne-Kamga, N. Dunn, A.M. Salet, D. Nambatingar
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
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. ...
Journal Article
The enigmatic continental crust of North-Central Africa: Saharan Metacraton or Central Sahara Shield? Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
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...
Journal Article
Formation of Anorthositic Rocks within the Blair River Inlier of Northern Cape Breton Island, Nova Scotia (Canada) Open Access
Journal: Lithosphere
Publisher: GSW
Published: 30 June 2020
Lithosphere (2020) 2020 (1): 8825465.
... , 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...
Includes: Supplemental Content
Journal Article
Neoproterozoic magmatic evolution of the southern Ouaddaï Massif (Chad) Open Access
Publisher: Société Géologique de France
Published: 24 November 2020
Bulletin de la Société Géologique de France (2020) 191 (1): 34.
... 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...
Journal Article
Gravimetry and petrophysics for defining the intracratonic and rift basins of the Western-Central Africa zone Available to Purchase
Journal: Geophysics
Publisher: Society of Exploration Geophysicists
Published: 29 September 2021
Geophysics (2021) 86 (6): B369–B388.
... 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...
Journal Article
Late Permian mafic rocks identified within the Doba basin of southern Chad and their relationship to the boundary of the Saharan Metacraton Available to Purchase
J. GREGORY SHELLNUTT, TUNG-YI LEE, CHIH-CHENG YANG, SHIN-TAI HU, JONG-CHANG WU, KUO-LUNG WANG, CHING-HUA LO
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 06 May 2015
Geological Magazine (2015) 152 (6): 1073–1084.
... 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...
Journal Article
Amphiboles and phyllosilicates in the A-type Mandira Granite Massif, Graciosa Province, SE Brazil: Textures, composition and crystallisation conditions Available to Purchase
Journal: Mineralogical Magazine
Published: 19 August 2021
Mineralogical Magazine (2021) 85 (5): 784–807.
... 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...
Image
References Andersen T. , Elburg M. and Erambert M. ( 2... Available to Purchase
in Amphiboles and phyllosilicates in the A-type Mandira Granite Massif, Graciosa Province, SE Brazil: Textures, composition and crystallisation conditions
> Mineralogical Magazine
Published: 19 August 2021
. and Iizuka Y. ( 2020 ) An assessment of the magmatic conditions of late Neoproterozoic 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
Image
References Andersen T. , Elburg M. and Erambert M. ( 2... Available to Purchase
in Amphiboles and phyllosilicates in the A-type Mandira Granite Massif, Graciosa Province, SE Brazil: Textures, composition and crystallisation conditions
> Mineralogical Magazine
Published: 19 August 2021
. and Iizuka Y. ( 2020 ) An assessment of the magmatic conditions of late Neoproterozoic 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
Journal Article
SEG Newsletter 78 (July) Available to Purchase
Journal: SEG Discovery
Publisher: Society of Economic Geologists
Published: 01 July 2009
SEG Discovery (2009) (78): 1–64.
... 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...