The ancient Gondwana supercontinent in the southern hemisphere was derived from the Rodinia supercontinent after ~1000 Ma. The tectonic-thermal activities during Gondwana's evolution (~700-500 Ma) describe what is commonly referred to as the Pan-African Orogeny, in which many fragments of the Gondwana supercontinent were sutured along mobile belts. The Saharan region of North-Central Africa is an enigmatic part of the Pan-African Orogeny. The region is composed of the Trans-Saharan belt in the west and the Arabian Nubian Shield in the east, but whether a large craton is located between them is an unresolved question. There are two opposing ideas regarding the crust of North-Central Africa. It is either composed of a single craton that was collectively metamorphosed during the Neoproterozoic (Saharan Metacraton) or it is composed of a number of smaller terranes that accreted during the Neoproterozoic (Central Saharan Shield). Chad, located in the Central Sahara, contains Precambrian massifs that are covered by Phanerozoic rocks in the Erdis basin to the north; Bongor, Doba, Doseo, and Salamat basins to the south; the Lake Chad basin to the west. The Doba basin is considered to be located near the boundary between Congo Craton and the Saharan Metacraton and contains granite covered by Late Mesozoic to Early Cenozoic sedimentary rocks. The granitic rocks in the Doba basin were collected from five drill wells in order to examine their petrography, geochronology, mineral chemistry, and geochemistry.
The granitic rocks from the Doba basin are Late-Neoproterozoic and were emplaced at two distinct intervals: ~595 Ma and ~580 Ma. The older rocks are compositionally similar to I-type granite whereas the younger rocks are similar to A-type granite. Paleoproterozoic inherited zircons (~1700 Ma and ~2100 Ma) were identified in the Bebalem-1 drill well and imply the Doba granites are built upon older continental crust.
Biotite and titanite chemistry in the granite of the Doba basin was used to estimate the magmatic conditions of each pluton. The titanite chemistry indicates that it crystalized from 783oC to 668oC at pressure of ~1.55 kbar to ~4.77 kbar. In comparison, the biotite crystallized at temperatures of 847oC to 630oC at pressures of ~0.83 kbar to ~3.36 kbar under the oxidizing condition with ΔQFM of -0.1 to -0.3.
All types of granite in the Doba basin are metaluminous in composition, but the I-type granites are magnesian whereas the A-type granite straddles the boundary between magnesian and ferroan. They are subdivided into smaller groups as alkalic and alkali-calcic. The I-type granites (~595 Ma) have negative Eu anomalies (Eu/Eu* = 0.58 to 1.01) that could relate to the magma source. The A-type granite (~580 Ma) records positive Eu anomalies (Eu/Eu* = 0.98 to 2.05) and was likely generated at a post-collisional continental intraplate setting.
The granites from the Doba basin are chemically similar to and contemporaneous with rocks from the Guéra and Ouaddai massif to the northwest (within-plate and volcanic-arc granite). The results suggest that there might be a volcanic arc that stretched ~500 km from the NE to SW and that older terranes were sutured together. If this is the case then the results strongly favor the Central Sahara Shield model.
Keywords: Granite, Late Ediacaran, Doba basin, Pan-African Orogeny, Central Saharan Shield.

Abdelsalam, M. G., & Stern, R. J. (1996). Sutures and shear zones in the Arabian-Nubian Shield. Journal of African Earth Sciences, 23(3), 289-310.
Abdelsalam, M., Liegeois, J. P. & Stern, R. J. (2002). The Saharan Metacraton. African. Journal of African Earth Sciences, 34, 119-36.
Affaton, P., Kalsbeek, F., Boudzoumou, F., Trompette, R., Thrane, K., & Frei, R. (2016). The Pan-African West Congo belt in the Republic of Congo (Congo Brazzaville): stratigraphy of the Mayombe and West Congo Supergroups studied by detrital zircon geochronology. Precambrian Research, 272, 185-202.
Alkmim, F. F., Marshak, S., & Fonseca, M. A. (2001). Assembling West Gondwana in the Neoproterozoic: clues from the São Francisco craton region, Brazil. Geology, 29(4), 319-322.
Andersen, L. S., & Unrug, R. (1984). Geodynamic evolution of the Bangweulu Block, northern Zambia. Precambrian Research, 25(1-3), 187-212.
Ayers, J. C., Flanagan, D., Miller, C., Watson, E. B., Ryerson, F. J., Wallrich, B., & Ackerson, M. (2022). The solubility of titanite in silicate melt determined from growth and dissolution experiments. Contributions to Mineralogy and Petrology, 177(3), 1-15.
Barbarin, B. (1990). Granitoids: main petrogenetic classifications in relation to origin and tectonic setting. Geological Journal, 25(3‐4), 227-238.
Barbarin, B. (1999). A review of the relationships between granitoid types, their origins, and their geodynamic environments. Lithos, 46(3), 605-626.
Batchelor, R. A., & Bowden, P. (1985). Petrogenetic interpretation of granitoid rock series using multicationic parameters. Chemical Geology, 48(1-4), 43-55.
Begg, G. C., Griffin, W. L., Natapov, L. M., O'Reilly, S. Y., Grand, S. P., O'Neill, C. J., Hronsky, J. M. A., Djomani, Y. P., Swain, C. J., Deen, T., & Bowden, P. (2009). The lithospheric architecture of Africa: Seismic tomography, mantle petrology, and tectonic evolution. Geosphere, 5(1), 23-50.
Benkhelil, J., Dainelli, P., Ponsard, J. F., Popoff, M., & Saugy, L. (1988). The Benue Trough: wrench-fault-related basin on the border of the equatorial Atlantic. Developments in Geotectonics, 32(22), 787-819.
Black, R., & Girod, M. (1970). Late Paleozoic to Recent igneous activity in West Africa and its relationship to basement structure. African Magmatism and Tectonics, 185-210.
Boehnke, P., Watson, E. B., Trail, D., Harrison, T. M., & Schmitt, A. K. (2013). Zircon saturation re-revisited. Chemical Geology, 351, 324-334.
Bonin, B. (2007). A-type granites and related rocks: evolution of a concept, problems and prospects. Lithos, 97(1-2), 1-29.
Bonin, B., Janoušek, V., & Moyen, J.-F. (2020). Chemical variation, modal composition and classification of granitoids. Geological Society, London, Special Publications, 491(1), 9-51.
Bosellini, A. (1992). The Continental Margins of Somalia: Structural Evolution and Sequence Stratigraphy. Geology and Geophysics of Continental Margins, 53, 185-205.
Boullier, A. M., Liégeois, J. P., Black, R., Fabre, J., Sauvage, M., & Bertrand, J. M. (1986). Late Pan-African tectonics marking the transition from subduction-related calc-alkaline magmatism to within-plate alkaline granitoids (Adrar des Iforas, Mali). Tectonophysics, 132(1-3), 233-246.
Bowen, N. L. (1928). The evolution of the igneous rocks, Princeton University Press, 602.
Brown, M. (2013). Granite: From genesis to emplacement. Geological Society of America Bulletin, 125(7-8), 1079-1113.
Buddington, A. F., & Lindsley, D. H. (1964). Iron-titanium oxide minerals and synthetic equivalents. Journal of Petrology, 5(2), 310-357.
Burke, K. (1976). The Chad Basin: an active intra-continental basin. Developments in Geotectonics, 12, 197-206.
Carmichael, I. S. (1991). The redox states of basic and silicic magmas: a reflection of their source regions? Contributions to Mineralogy and Petrology, 106(2), 129-141.
Caxito, F. D. A., Santos, L. C. M. D. L., Ganade, C. E., Bendaoud, A., Fettous, E. H., & Bouyo, M. H. (2020). Toward an integrated model of geological evolution for NE Brazil-NW Africa: The Borborema Province and its connections to the Trans-Saharan (Benino-Nigerian and Tuareg shields) and Central African orogens. Brazilian Journal of Geology, 50, 1-38.
Chen, L., Ji, H., Dou, L., Du, Y., Xu, Z., Zhang, L., Yang, X., & Fu, S. (2018). The characteristics of source rock and hydrocarbon charging time of Precambrian granite reservoirs in the Bongor Basin, Chad. Marine and Petroleum Geology, 97, 323-338.
Clemens, J. D., Holloway, J. R., & White, A. J. R. (1986). Origin of an A-type granite; experimental constraints. American Mineralogist, 71(3-4), 317-324.
Couzinié, S., Ménot, R. P., Doumnang, J. C., Paquette, J. L., Rochette, P., Quesnel, Y., Deschamps, P., & Ménot, G. (2020). Crystalline inliers near Lake Iro (SE Chad): Post-collisional Ediacaran A2-type granitic magmatism at the southern margin of the Saharan Metacraton. Journal of African Earth Sciences, 172(103960), 1-18.
Coward, M. P., and Daly, M. C. (1984). Crustal lineaments and shear zones in Africa: their relationships to plate movements. Precambrian Research, 24, 27-45.
Daly, M. C., Chorowicz, J., & Fairhead, J. D. (1989). Rift basin evolution in Africa: the influence of reactivated steep basement shear zones. Geological Society of London, Special Publications, 44(1), 309-334.
David, R. W., & Hans, P. E. (1965). Stability of biotite: experiment, theory, and application. American Mineralogist: Journal of Earth and Planetary Materials, 50(9), 1228-1272.
Dawaï, D., Bouchez, J. L., Paquette, J. L., & Tchameni, R. (2013). The Pan-African quartz-syenite of Guider (North-Cameroon): magnetic fabric and U–Pb dating of a late-orogenic emplacement. Precambrian Research, 236, 132-144.
de Wit, M. J., Bowring, S., Buchwaldt, R., Dudas, F. Ö., MacPhee, D., Tagne-Kamga, G., Dunn, N., Salet, A.M., & Nambatingar, D. (2021). Geochemical reconnaissance of the Guéra and Ouaddaï Massifs in Chad: evolution of Proterozoic crust in the Central Sahara Shield. South African Journal of Geology, 124(2), 353-382.
Djerossem, F., Berger, J., Vanderhaeghe, O., Isseini, M., Ganne, J., & Zeh, A. (2020). Neoproterozoic magmatic evolution of the southern Ouaddaï Massif (Chad). BSGF-Earth Sciences Bulletin, 191, 34.
Djerossem, F., Zeh, A., Isseini, M., Vanderhaeghe, O., Berger, J., & Ganne, J. (2021). U-Pb-Hf isotopic systematics of zircons from granites and metasediments of southern Ouaddaï (Chad), implications for crustal evolution and provenance in the Central Africa Orogenic Belt. Precambrian Research, 361, 106233.
Dou, L., Wang, J., Wang, R., Wei, X., & Shrivastava, C. (2018). Precambrian basement reservoirs: Case study from the northern Bongor Basin, the Republic of Chad. AAPG Bulletin, 102(9), 1803-1824.
Duan, M., Niu, Y., Sun, P., Chen, S., Kong, J., Li, J., Zhang, Y., Hu, Y., & Shao, F. (2022). A simple and robust method for calculating temperatures of granitoid magmas. Mineralogy and Petrology, 116(1), 93-103.
Durr, S. B., & Dingeldey, D. P. (1996). The Kaoko belt (Namibia): part of a late Neoproterozoic continental-scale strike-slip system. Geology, 24(6), 503-506.
Erdmann, S., Wang, R., Huang, F., Scaillet, B., Zhao, K., Liu, H., Chen, Y., & Faure, M. (2019). Titanite: A potential solidus barometer for granitic magma systems. Comptes Rendus Geoscience, 351(8), 551-561.
Eugster, H. P., & Wones, D. R. (1962). Stability relations of the ferruginous biotite, annite. Journal of Petrology, 3(1), 82-125.
Fairhead, J. D., & Binks, R. M. (1991). Differential opening of the Central and South Atlantic Oceans and the opening of the West African rift system. Tectonophysics, 187(1-3), 191-203.
Ferré, E., Déléris, J., Bouchez, J. L., Lar, A. U., & Peucat, J. J. (1996). The Pan-African reactivation of Eburnean and Archaean provinces in Nigeria: structural and isotopic data. Journal of the Geological Society, 153(5), 719-728.
Ferré, E., Gleizes, G., & Caby, R. (2002). Obliquely convergent tectonics and granite emplacement in the Trans-Saharan belt of Eastern Nigeria: a synthesis. Precambrian Research, 114(3-4), 199-219.
Fezaa, N., Liégeois, J. P., Abdallah, N., Cherfouh, E. H., De Waele, B., Bruguier, O., & Ouabadi, A. (2010). Late Ediacaran geological evolution (575–555 Ma) of the Djanet Terrane, Eastern Hoggar, Algeria, evidence for a Murzukian intracontinental episode. Precambrian Research, 180(3-4), 299-327.
Foster, M. D. (1960). Interpretation of the composition of trioctahedral micas. Professional Paper, 354, 11-49.
Franssen, L., & André, L. (1988). The Zadinian Group (late Proterozoic, Zaire) and its bearing on the origin of the West-Congo orogenic belt. Precambrian Research, 38(3), 215-234.
Frimmel, H. E. (2018). The Gariep Belt. Geology of Southwest Gondwana, 353-386.
Frost, B. R., Barnes, C. G., Collins, W. J., Arculus, R. J., Ellis, D. J., & Frost, C. D. (2001). A geochemical classification for granitic rocks. Journal of Petrology, 42(11), 2033-2048.
Genik, G. J. (1992). Regional framework, structural and petroleum aspects of rift basins in Niger, Chad, and the Central African Republic (CAR). Tectonophysics, 213, 169-185.
Genik, G. J. (1993). Petroleum geology of Cretaceous-Tertiary rift basins in Niger, Chad, and Central African Republic. AAPG Bulletin, 77, 1405-1434.
Ghiorso, M. S., & Sack, O. (1991). Fe-Ti oxide geothermometry, thermodynamic formulation and the estimation of intensive variables in silicic magmas. Contributions to Mineralogy and Petrology, 108(4), 485-510.
Ghuma, M. A., & Rogers, J. J. (1978). Geology, geochemistry, and tectonic setting of the Ben Ghnema batholith, Tibesti massif, southern Libya. Geological Society of America Bulletin, 89(9), 1351-1358.
Goscombe, B. D., & Gray, D. R. (2008). Structure and strain variation at mid-crustal levels in a transpressional orogen: a review of Kaoko Belt structure and the character of West Gondwana amalgamation and dispersal. Gondwana Research, 13(1), 45-85.
Goscombe, B., Foster, D. A., Gray, D., & Wade, B. (2020). Assembly of central Gondwana along the Zambezi Belt: Metamorphic response and basement reactivation during the Kuunga Orogeny. Gondwana Research, 80, 410-465.
Goscombe, B., Gray, D., Armstrong, R., Foster, D. A., & Vogl, J. (2005). Event geochronology of the Pan-African Kaoko belt, Namibia. Precambrian Research, 140(3-4), 103.e1-103.e41.
Goscombe, B., Hand, M., Gray, D., & Mawby, J. O. (2003). The metamorphic architecture of a transpressional orogen: The Kaoko Belt, Namibia. Journal of Petrology, 44(4), 679-711.
Gourgaud, A., & Vincent, P. M. (2004). Petrology of two continental alkaline intraplate series at Emi Koussi volcano, Tibesti, Chad. Journal of Volcanology and Geothermal Research, 129(4), 261-290.
Groves, D. I., & Santosh, M. (2021). Craton and thick lithosphere margins: The sites of giant mineral deposits and mineral provinces. Gondwana Research, 100, 195-222.
Guiraud, R., & Maurin, J. C. (1992). Early Cretaceous rifts of Western and Central Africa: an overview. Tectonophysics, 213, 153-168.
Hamdja Ngoniri, A., Soh Tamehe, L., Ganno, S., Ngnotue, T., Chen, Z., Li, H., Ayonta Kenne, P., & Nzenti, J. P. (2021). Geochronology and petrogenesis of the Pan-African granitoids from Mbondo-Ngazi Tina in the Adamawa-Yadé Domain, Central Cameroon. International Journal of Earth Sciences, 110(6), 2221-2245.
Hanson, R. E., Hargrove, U. S., Martin, M. W., Bowring, S. A., Krol, M. A., Hodges, K. V., & Blekinsop, T. G. (1998). New geochronological constraints on the tectonic evolution of the Pan-African Zambezi Belt, south central Africa. Journal of African Earth Sciences, 27(1), 104-104.
Hayden, L. A., Watson, E. B., & Wark, D. A. (2008). A thermobarometer for sphene (titanite). Contributions to Mineralogy and Petrology, 155(4), 529-540.
Hefferan, K., Soulaimani, A., Samson, S. D., Admou, H., Inglis, J., Saquaque, A., Latifa, C., & Heywood, N. (2014). A reconsideration of Pan African orogenic cycle in the Anti-Atlas Mountains, Morocco. Journal of African Earth Sciences, 98, 34-46.
Henry, B., Liégeois, J. P., Nouar, O., Derder, M. E. M., Bayou, B., Bruguier, O., Ouabadi, A., Belhai, D., Amenna, M., Hemmi, A., & Ayache, M. (2009). Repeated granitoid intrusions during the Neoproterozoic along the western boundary of the Saharan metacraton, Eastern Hoggar, Tuareg shield, Algeria: an AMS and U–Pb zircon age study. Tectonophysics, 474(3-4), 417-434.
Hesse, K. H., Hissene, A., Kheir, O., Schnäcker, E., Schneider, M., & Thorweihe, U. (1987). Hydrogeological investigations in the Nubian aquifer system, eastern Sahara. Pascal and Francis Bibliographic Databases, 75, 397-464.
Isseini, M., Andre-Mayer, A. S., Vanderhaeghe, O., Barbey, P., & Deloule, E. (2012). A-type granites form the Pan-African orogenic belt in south-western Chad constrained using geochemistry, Sr-Nd isotopes, and U-Pb geochronology. Lithos, 153, 39-52.
Isseini, M., Hamit, A., & Abderamane, M. (2013). The tectonic and geological framework of the Mongo area, a segment of the Pan-African Guéra Massif in Central Chad: evidences from field observations and remote sensing. Revue Scientifique du Tchad, 1(3), 4-12.
Jayasuriya, K. D., O’Neill, H. S. C., Berry, A. J., & Campbell, S. J. (2004). A Mossbauer study of the oxidation state of Fe in silicate melts. American Mineralogist, 89(11-12), 1597-1609.
John, T., Schenk, V., Mezger, K., & Tembo, F. (2004). Timing and PT evolution of whiteschist metamorphism in the Lufilian Arc–Zambezi Belt orogen (Zambia): implications for the assembly of Gondwana. The Journal of Geology, 112(1), 71-90.
Johnson, P. R., & Woldehaimanot, B. (2003). Development of the Arabian-Nubian Shield: perspectives on accretion and deformation in the northern East African Orogen and the assembly of Gondwana. Geological Society of London, Special Publications, 206(1), 289-325.
Kamwa, A. N., Tchakounte, J. N., Nkoumbou, C., Owona, S., Tchouankoue, J. P., & Ondoa, J. M. (2019). Petrology and geochemistry of the Yoro-Yangben Pan-African granitoid intrusion in the archaean Adamawa-Yade crust (Sw-Bafia, Cameroon). Journal of African Earth Sciences, 150, 401-414.
Kennedy, W. Q. (1964). The structural differenciation of Africa in the Pan-African (+/-500 my) tectonic episode. University of Leeds, Research Institute of African Geology, Annual Report on Scientific Results, 8, 48-49.
Kilinc, A., Carmichael, I. S. E., Rivers, M. L., & Sack, R. O. (1983). The ferric-ferrous ratio of natural silicate liquids equilibrated in air. Contributions to Mineralogy and Petrology, 83(1), 136-140.
Kress, V. C., & Carmichael, I. S. (1991). The compressibility of silicate liquids containing Fe2O3 and the effect of composition, temperature, oxygen fugacity and pressure on their redox states. Contributions to Mineralogy and Petrology, 108(1), 82-92.
Kroner, A., & Correia, H. (1980). Continuation of the Pan African Damara belt into Angola: A proposed correlation of the Chela Group in southern Angola with the Nosib Group in northern Namibia/SWA. South African Journal of Geology, 83(1), 5-16.
Kröner, A., (2004). Pan-African Orogeny. Encyclopedia of Geology, 1, 1-12.
Kusnir, I., & Moutaye, H. A. (1997). Ressources minérales du Tchad: Une revue. Journal of African Earth Sciences, 24(4), 549-562.
Küster, D. (2009). Granitoid-hosted Ta mineralization in the Arabian–Nubian Shield: ore deposit types, tectono metallogenetic setting and petrogenetic framework. Ore Geology Reviews, 35(1), 68-86.
Landing, E. (1994). Precambrian-Cambrian boundary global stratotype ratified and a new perspective of Cambrian time. Geology, 22(2), 179-182.
Lawal, K. M., Umego, M. N., & Ojo, S. B. (2005). New insight into the geology of the Chad basin. Nigerian Journal of Physics, 17(2), 165-169.
Liégeois, J. P., Abdelsalam, M. G., Ennih, N., & Ouabadi, A. (2013). Metacraton: nature, genesis, and behavior. Gondwana Research, 23(1), 220-237.
Luhr, J. F., Carmichael, I. S., & Varekamp, J. C. (1984). The 1982 eruptions of El Chichón Volcano, Chiapas, Mexico: mineralogy and petrology of the anhydritebearing pumices. Journal of Volcanology and Geothermal Research, 23(1-2), 69-108.
MacKenzie, W. S., & Guilford, C. (2014). Atlas of the Rock-Forming Minerals in Thin Section. Routledge, 104.
Manga, C. S., Loule, J. P., & Koum, J. J. (2001). Tectonostratigraphic evolution and prospectivity of the Logone Birni Basin, North Cameroon – Central Africa. American Association of Petroleum Geologists Bulletin, 85, 1-6.
Markl, G., & Piazolo, S. (1999). Stability of high - Al titanite from low-pressure calcsilicates in light of fluid and host-rock composition. American Mineralogist, 84(1-2), 37-47.
McWilliams, M. O. (1981). Palaeomagnetism and Precambrian tectonic evolution of Gondwana. Developments in Precambrian Geology, 4, 649-687.
Medlicott, H. B., Blanford, W. T., Ball, V., & Mallet, F. R. (1879). A Manual of the Geology of India: Peninsular area, by HB Medlicott and WT Blanford. Geological Survey Office, 1879-1887.
Meert, J. G. (2003). A synopsis of events related to the assembly of eastern Gondwana. Tectonophysics, 362(1-4), 1-40.
Meert, J. G., & Van Der Voo, R. (1997). The assembly of Gondwana 800-550 Ma. Journal of Geodynamics, 23(3-4), 223-235.
Monnier, L., Lach, P., Salvi, S., Melleton, J., Bailly, L., Beziat, D., de Parseval, P., & Gouy, S. (2018). Quartz trace-element composition by LA-ICPMS as proxy for granite differentiation, hydrothermal episodes, and related mineralization: The Beauvoir Granite (Echassières district), France. Lithos, 320, 355-377.
Moradi, R. (2017). Chemical composition of biotite from the Lar Cu-Mo prospect igneous rocks, Southeastern part of Iran. International Journal of Green Pharmacy, 11(03), 549.
Morakinyo, A. M., Mohamed, A. Y., & Bowden, S. A. (2021). The release of petroleum from Central Africa rift basins over geological time as deduced from petroleum systems modeling. Journal of African Earth Sciences, 183, 104319.
Mosley, P. N. (1993). Geological evolution of the Late Proterozoic “Mozambique Belt” of Kenya. Tectonophysics, 221, 223-250.
Mothersill, J. S. (1971). Limnogeological studies of the eastern part of the Lake Superior Basin. Canadian Journal of Earth Sciences, 8(9), 1043-1055.
Nachit, H., Ibhi, A., & Ohoud, M. B. (2005). Discrimination between primary magmatic biotites, reequilibrated biotites and neoformed biotites. Comptes Rendus Geoscience, 337(16), 1415-1420.
Nédélec, A., & Bouchez, J. L. (2015). Granites: petrology, structure, geological setting, and metallogeny. Oxford University Press, 349.
Ngako, V., Affaton, P., & Njonfang, E. (2008). Pan-African tectonics in northwestern Cameroon: implication for the history of western Gondwana. Gondwana Research, 14(3), 509-522.
Njanko, T., Nédélec, A., & Affaton, P. (2006). Synkinematic high - K calc-alkaline plutons associated with the Pan-African Central Cameroon shear zone (W-Tibati area): petrology and geodynamic significance. Journal of African Earth Sciences, 44(4-5), 494-510.
Nzenti, J. P., Kapajika, B., Wörner, G., & Lubala, T. R. (2006). Synkinematic emplacement of granitoids in a Pan-African shear zone in Central Cameroon. Journal of African Earth Sciences, 45(1), 74-86.
O’Brien, W. D., Dorais, M. J., Christiansen, E. H., & Gibson, D. (2019). Formation of rapakivi feldspar in the Deer Isle Granite Complex, coastal Maine: in situ lead isotope and trace-element analysis. Contributions to Mineralogy and Petrology, 174(6), 56.
Oberti, R., Smith, D. C., Rossi, G., & Caucia, F. (1981). The crystal-chemistry of high-aluminium titanites. European Journal of Mineralogy, 3, 777-792.
Ottonello, G., Moretti, R., Marini, L., & Zuccolini, M. V. (2001). Oxidation state of iron in silicate glasses and melts: a thermochemical model. Chemical Geology, 174(1-3), 157-179.
Passchier, C. W., Trouw, R. A. J., Ribeiro, A., & Paciullo, F. V. P. (2002). Tectonic evolution of the southern Kaoko belt, Namibia. Journal of African Earth Sciences, 35(1), 61-75.
Pearce, J. (1996). Sources and settings of granitic rocks. Episodes, 19(4), 120–125.
Pearce, J. A., Harris, N. B., & Tindle, A. G. (1984). Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology, 25(4), 956-983.
Penaye, J., Kröner, A., Toteu, S. F., Van Schumus V., W. R., & Doumnang, J. C. (2006). Evolution of the Mayo Kebbi region as revealed by zircon dating: an early (ca. 740 Ma) Pan-African magmatic arc in south western Chad. Journal of African Earth Sciences, 44, 530-542.
Permenter, J. L., & Oppenheimer, C. (2007). Volcanoes of the Tibesti massif (Chad, northern Africa). Bulletin of Volcanology, 69(6), 609-626.
Pidgeon, R. T. (1978). Cogenetic and inherited zircan U-Pb systems in granites: Palaeozoic granites of Scotland and England. Geology, Special Issue, 10, 183-220.
Pin, C., & Poidevin, J. L. (1987). U-Pb zircon evidence for a Pan-African granulite facies metamorphism in the Central African Republic. A new interpretation of the high-grade series of the northern border of the Congo Craton. Precambrian Research, 36(3-4), 303-312.
Pinna, P., Calvez, J. Y., Abessolo, A., Angel, J. M., Mekoulou-Mekoulou, T., Mananga, G., & Vernhet, Y. (1994). Neoproterozoic events in the Tcholliré area: Pan-African crustal growth and geodynamics in central-northern Cameroon (Adamawa and North Provinces). Journal of African Earth Sciences, 18(4), 347-353.
Pinna, P., Jourde, J., Calvez, J. Y., Mroz, J. P., & Marques J. M. (1993). The Mozambique Belt in Northern Mozambique: Late Proterozoic (1.1-0.85 Ga) crustal growth and tectogenesis and superimposed Pan-African (0.8-0.55 Ga) tectonics. Precambrian Research, 62, 1-59.
Porada, H. (1989). Pan-African rifting and orogenesis in southern to equatorial Africa and eastern Brazil. Precambrian Research, 44(2), 103-136.
Pouclet, A., Vidal, M., Doumnang, J. C., Vicat, J. P., & Tchameni, R. (2006). Neoproterozoic crustal evolution in Southwestern Chad: Pan-African Ocean basin closing, arc accretion and late to post-orogenic granitic. Journal of African Earth Science, 44, 543-560.
Rabinowitz, P. D., Coffin, M. F., & Falvey, D. (1983). The separation of Madagascar and Africa. Science, 220(4592), 67-69.
Reeves, C. (2014). The position of Madagascar within Gondwana and its movements during Gondwana dispersal. Journal of African Earth Sciences, 94, 45-57.
Rieder, M., Cavazzini, G., D’yakonov, Y. S., Frank-Kamenetskii, V. A., Gottardi, G., Guggenheim, S., & Wones, D. R. (1998). Nomenclature of the micas. Clays and Clay Minerals, 46, 586-595.
Rino, S., Kon, Y., Sato, W., Maruyama, S., Santosh, M., & Zhao, D. (2008). The Grenvillian and Pan-African orogens: world's largest orogenies through geologic time, and their implications on the origin of superplume. Gondwana Research, 14(1-2), 51-72.
Rogers, J. J., Unrug, R., & Sultan, M. (1995). Tectonic assembly of Gondwana. Journal of Geodynamics, 19(1), 1-34.
Rollinson, H. R. (2014). Using geochemical data: evaluation, presentation, interpretation. Routledge, 384.
Saha-Fouotsa, A. N., Vanderhaeghe, O., Barbey, P., Eglinger, A., Tchameni, R., Zeh, A., Tchunte, P. F., & Nomo, E. N. (2019). The geologic record of the exhumed root of the Central African Orogenic Belt in the central Cameroon domain (Mbé–Sassa-Mbersi region). Journal of African Earth Sciences, 151, 286-314.
Schimschal, C. M., & Jokat, W. (2019). The Falkland Plateau in the context of Gondwana breakup. Gondwana Research, 68, 108-115.
Schlüter, T. (2006). Geological Atlas of Africa: With Notes on Stratigraphy, Tectonics, Economic Geology, Geohazards and Geosites of Each Country, Springer-Verlag Berlin Heidelberg, 68-71.
Schlüter, T. (2008). Geological Atlas of Africa. Springer-Verlag Berlin, 307.
Schuster, M., Duringer, P., Ghienne, J. F., Roquin, C., Sepulchre, P., Moussa, A., Lebatard, A. E., Mackaye, H. T., Likius, A., Vignaud, P., & Brunet, M. (2009). Chad Basin: paleoenvironments of the Sahara since the Late Miocene. Comptes Rendus Geoscience, 341(8-9), 603-611.
Semiz, B., Çoban, H., Roden, M. F., Özpınar, Y., Flower, M. F., & McGregor, H. (2012). Mineral composition in cognate inclusions in Late Miocene–Early Pliocene potassic lamprophyres with affinities to lamproites from the Denizli region, Western Anatolia, Turkey: implications for uppermost mantle processes in a back-arc setting. Lithos, 134, 253-272.
Shabani, A. A., Lalonde, A. E., & Whalen, J. B. (2003). Composition of biotite from granitic rocks of the Canadian Appalachian orogen: a potential tectonomagmatic indicator? The Canadian Mineralogist, 41(6), 1381-1396.
Shand S. J. (1943). The eruptive rocks 2nd edition, John Wiley, New York, 444.
Shaw, S. E., & Flood, R. H. (1981). The New England Batholith, eastern Australia: geochemical variations in time and space. Journal of Geophysical Research: Solid Earth, 86(B11), 10530-10544.
Shellnutt, J. G., Lee, T. Y., Chiu, H. Y., Lee, Y. H., & Wong, J. (2015a). Evidence of Middle Jurassic magmatism within the Seychelles microcontinent: Implications for the breakup of Gondwana. Geophysical Research Letters, 42(23), 207-215
Shellnutt, J. G., Lee, T. Y., Torng, P. K., Yang, C. C., & Lee, Y. H. (2016). Late Cretaceous intraplate silicic volcanic rocks from the Lake Chad region: An extension of the Cameroon volcanic line? Geochemistry, Geophysics, Geosystems, 17(7), 2803-2824.
Shellnutt, J. G., Yeh, M. W., Lee, T. Y., Iizuka, Y., Pham, N. H. T., & Yang, C. C. (2018). The origin of Late Ediacaran post-collisional granites near the Chad Lineament, Saharan Metacraton, south-central Chad. Lithos, 304, 450-467.
Shellnutt, J. G., Yeh, M. W., Pham, N. H. T., & Lee, T. Y. (2019). Cryptic regional magmatism in the southern Saharan Metacraton at 580 Ma. Precambrian Research, 332, 105398.
Shellnutt, J. G., Yeh, M. W., Pham, N. H. T., & Lee, T. Y. (2022). Late Ediacaran post-collisional magmatism in the Guéra Massif, south-central Chad. International Geology Review, 64(8), 1097-1118.
Shellnutt, J. G, Pham, T. N. H., Denyszyn, S., Yeh, M. W., & Lee, T. Y. (2017). Timing of collisional and post-collisional Pan African Orogeny silicic magmatism in south-central Chad. Precambrian Research, 301, 113-123.
Shellnutt, J. G., Lee, T. Y., Yang, C. C., Hu, S. T., Wu, J. C., Wang, K. L., & Lo, C. H. (2015b). Late Permian mafic rocks identified within the Doba basin of southern Chad and their relationship to the boundary of the Saharan Metacraton. Geological Magazine, 152, 1073-1084.
Shen, P., Hattori, K., Pan, H., Jackson, S., & Seitmuratova, E. (2015). Oxidation condition and metal fertility of granitic magmas: Zircon trace-element data from porphyry Cu deposits in the Central Asian orogenic belt. Economic Geology, 110(7), 1861-1878.
Stern, R. J., Kröner, A., Bender, R., Reischmann, T., & Dawoud, A. S. (1994). Precambrian basement around Wadi Halfa, Sudan: a new perspective on the evolution of the East Saharan Craton. Geologische Rundschau, 83(3), 564-577.
Streckeisen, A. (1976). To each plutonic rock its proper name. Earth-Science Reviews, 12(1), 1-33.
Suayah, I. B., Miller, J. S., Miller, B. V., Bayer, T. M., & Rogers, J. J. (2006). Tectonic significance of Late Neoproterozoic granites from the Tibesti massif in southern Libya inferred from Sr and Nd isotopes and U–Pb zircon data. Journal of African Earth Sciences, 44(4-5), 561-570.
Sumery, M. N. F., Lo, S. Z., & Salim, A. M. A. (2017). Lacustrine environment reservoir properties on sandstone minerals and hydrocarbon content: a case study on Doba basin, southern Chad. IOP Conference Series: Earth and Environmental Science, 88, 012005.
Sun, S. S., & McDonough, W. F. (1989). Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society of London, Special Publications, 42(1), 313-345.
Tchakounté, J., Eglinger, A., Toteu, S. F., Zeh, A., Nkoumbou, C., Penaye, J., de Wit, M., & Barbey, P. (2017). The Adamawa-Yadé domain, a piece of Archaean crust in the Neoproterozoic central African orogenic belt (Bafia area, Cameroon). Precambrian Research, 299, 210-229.
Tchameni, R., Pouclet, A., Penaye, J., Ganwa, A. A., & Toteu, S. F. (2006). Petrography and geochemistry of the Ngaoundéré Pan-African granitoids in Central North Cameroon: Implications for their sources and geological setting. Journal of African Earth Sciences, 44(4-5), 511-529.
Torsvik, T. H., & Cocks, L. R. M. (2013). Gondwana from top to base in space and time. Gondwana Research, 24(3-4), 999-1030.
Toteu, S. F., de Wit, M., Penaye, J., Drost, K., Tait, J. A., Bouyo, M. H., Van Schmus, W. R., Jelsma, H., Moloto, A., Kenguemba, G. R., da Silva Filho, A. F., Lerouge, C., & Doucouré, M. (2022). Geochronology and correlations in the Central African Fold Belt along the northern edge of the Congo Craton: New insights from U-Pb dating of zircons from Cameroon, Central African Republic, and south-western Chad. Gondwana Research, 107, 296-324.
Toteu, S. F., Penaye, J. & Djomani, Y. P. (2004). Geodynamic evolution of the Pan-African belt in central Africa with special reference to Cameroon. Canadian Journal of Earth Sciences, 41, 73-85.
Toteu, S. F., Penaye, J., Deloule, E., Van Schmis, W. R., & Tchamen, R. (2006). Diachronous evolution of volcano-sedimentary basins north of the Congo craton: insights from U-Pb ion microprobe dating of zircons from the Poli, Lom, and Yaounde groups (Cameroon). Journal of African Earth Sciences, 44, 428-42.
Toteu, S. F., Van Schmus, W. R., Penaye, J., & Nyobe, J. B. (1994). U- Pb and Sm- N evidence for Eburnian and Pan-African high-grade metamorphism in cratonic rocks of southern Cameroon. Precambrian Research, 67(3-4), 321-347.
Toteu, S. F., van Schmus, W. R., Penaye, J., & Michard, A. (2001). New U-Pb and Sm-Nd data from north-central Cameroon and its bearing on the pre-Pan-African history of central Africa. Precambrian Research, 108, 45-73.
Tropper, P., Manning, C. E., & Essene, E. J. (2002). The substitution of Al and F in titanite at high pressure and temperature: experimental constraints on phase relations and solid solution properties. Journal of Petrology, 43(10), 1787-1814.
Tuttle, O. F., & Bowen, N. L. (1958). Origin of granite in the light of experimental studies in the system NaAlSi3O8–KAlSi3O8–SiO2–H2O. Geological Society of America, 74, 1-146.
Uchida, E., Endo, S., & Makino, M. (2007). Relationship between solidification depth of granitic rocks and formation of hydrothermal ore deposits. Resource Geology, 57(1), 47-56.
Unrug, R. (1992). The supercontinent cycle and Gondwanaland assembly: component cratons and the timing of suturing events. Journal of Geodynamics, 16(4), 215-240.
Van Hinsbergen, D. J., Buiter, S. J., Torsvik, T. H., Gaina, C., & Webb, S. J. (2011). The formation and evolution of Africa from the Archaean to Present: introduction. Geological Society of London, Special Publications, 357(1), 1-8.
Van Schmus, W. R., Oliveira, E. P., Da Silva Filho, A. F., Toteu, S. F., Penaye, J., & Guimarães, I. P. (2008). Proterozoic links between the Borborema province, NE Brazil, and the central African fold belt. Geological Society of London, Special Publications, 294(1), 69-99.
Veevers, J. J. (1988). Gondwana facies started when Gondwanaland merged in Pangea. Geology, 16(8), 732-734.
Vellutini, P., Rocci, G., Vicat, J. P. & Gioan, P. (1983). Mise en évidence de complexes ophiolitiques dans la chalne du Mayombe (Gabon-Angola) et nouvelles interprétations géotectoniques. Precambrian Research, 22, 1-21.
Vicat, J. P., Pouclet, A., Bellion, Y., & Doumnang, J. C. (2002). Les rhyolites hyperalcalines (pantellérites) du lac Tchad. Composition et signification tectonomagmatique. Comptes Rendus Geoscience, 334(12), 885-891.
Warren, M. J. (2009). Tectonic inversion and petroleum system implications in the rifts of Central Africa. In Frontiers and Innovation, CSPG CSEG CWLS Conference 4(8), 461-465.
Watson, E. B., & Harrison, T. M. (1983). Zircon saturation revisited: temperature and composition effects in a variety of crustal magma types. Earth and Planetary Science Letters, 64(2), 295-304.
Whalen, J. B., Currie, K. L., & Chappell, B. W. (1987). A-type granites: geochemical characteristics, discrimination and petrogenesis. Contributions to Mineralogy and Petrology, 95(4), 407-419.
Wilson, T. J., Grunow, A. M., & Hanson, R. E. (1997). Gondwana assembly: the view from southern Africa and East Gondwana. Journal of Geodynamics, 23(3-4), 263-286.
Wones, D. R. (1981). Mafic silicates as indicators of intensive variables in granitic magmas. Mining Geology, 31(168), 191-212.
Wones, D., & Eugster, H. (1965). Stability of biotite: experiment, theory, and application. American Mineralogist, 50, 1228-1272.
Yomeun, B. S., Wang, W., Kamani, M. S. K., Tchouankoue, J. P., Jiang, Y. D., Huang, S. F., Ndonfack, K. I. A., Xue, E. K., Lu, G. M., & Basua, E. A. A. (2022). Geochronology, geochemistry and Sr-Nd, Hf-O isotope systematics of the Linte massif, Adamawa-Yade domain, Cameroon: Implications on the evolution of the Central African Fold Belt. Precambrian Research, 375, 106675.
Yong, D. L. X. K. H., & Yebo, S. H. C. D. D. (2011). Petroleum geology and a model of hydrocarbon accumulations in the Bongor Basin, the Republic of Chad. Acta Petrolei Sinica, 32(3), 379.
Zheng, W., Mao, J. W., Pirajno, F., Zhao, H. J., Zhao, C. S., Mao, Z. H., & Wang, Y. J. (2015). Geochronology and geochemistry of the Shilu Cu–Mo deposit in the Yunkai area, Guangdong Province, South China and its implication. Ore Geology Reviews, 67, 382-398.