Petrographic and Geochemical Characterization of Metaluminous to Peraluminous Granitoids from Goueygoudoum-Fianga (Southwestern Chad): Insights into Magma Sources and Tectonic Setting — Oak Academic Publishing
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Petrographic and Geochemical Characterization of Metaluminous to Peraluminous Granitoids from Goueygoudoum-Fianga (Southwestern Chad): Insights into Magma Sources and Tectonic Setting
Department of Geosciences, Adam Barka University, Abeché, Chad
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Department of Mining, New and Renewable Energies, National Higher Institute of the Sahara and Sahel, Iriba, Chad
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Department of Mining and Geological Engineering, Faculty of Life and Earth Sciences, Pala University, Pala, Chad
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Department of Mining and Geological Engineering, Faculty of Life and Earth Sciences, Pala University, Pala, Chad
1 Department of Geosciences, Adam Barka University, Abeché, Chad
2 Department of Mining, New and Renewable Energies, National Higher Institute of the Sahara and Sahel, Iriba, Chad
3 Department of Mining and Geological Engineering, Faculty of Life and Earth Sciences, Pala University, Pala, Chad
4 Department of Mining and Geological Engineering, Faculty of Life and Earth Sciences, Pala University, Pala, Chad
The Goueygoudoum-Fianga localities, situated within the Central African Orogenic Belt to the east of the Mayo Kebbi massif (Chad), are dominated by various granitoid types: granodiorite, biotite granite (either deformed or undeformed), and microgranite. These intrusive rocks were emplaced within a greenstone belt and are geochemically divided into two major peraluminous series. The first series, classified as I-type, exhibits a weakly potassic calc-alkaline affinity with a ferro-magnesian composition. It is characterized by low concentrations of V, Cr, Co, Ni, Mg#, Nb/U, and Ce/Pb, along with high levels of alkalis and light rare earth elements (LREE), and positive Eu anomalies. These features suggest an origin related to partial melting of the continental crust, typical of volcanic arc settings. However, elevated Br and Sr contents, combined with low ratios (Rb/Sr, La/Sm, and (Ta/La) N , high Rb/Th values, and negative anomalies in Nb, Ta and Ti, point to the influence of a metasomatized mantle. The second series, identified as A-type, is distinguished by high concentrations of SiO 2 , K 2 O, FeO, and incompatible elements, as well as negative anomalies in Sr, Eu, and Ti. This series is derived from partial melting of metagreywackes, métapelites and metabasic to tonalitic in an intraplate tectonic setting. Its geochemical signature also reflects mantle influence associated with a subduction-related environment. The evolution of these granitoids is predominantly by the fractional crystallization processes, with possible crustal contamination during emplacement.
Hawkesworth, C.J. and Kemp, A.I.S. (2006) Evolution of the Continental Crust. Nature , 443, 811-817. https://doi.org/10.1038/nature05191
Condie, K.C., Belousova, E., Griffin, W.L. and Sircombe, K.N. (2009) Granitoid Events in Space and Time: Constraints from Igneous and Detrital Zircon Age Spectra. Gondwana Research , 15, 228-242. https://doi.org/10.1016/j.gr.2008.06.001
Terentiev, R.A. and Santosh, M. (2018) High Magnesian Granitoids in the Precambrian Continental Crust: Implication for the Continuum between Ferro-Potassic and Magnesio-Potassic Rock Suites. Lithos , 314, 669-682. https://doi.org/10.1016/j.lithos.2018.07.002
Chappell, B.W. and White, A.J.R. (1974) Two Contrasting Granite Types. Pacific Geology , 8, 173-174.
White, A.J.R. and Chappell, B.W. (1988) Some Supracrustal (S-Type) Granites of the Lachlan Fold Belt. Earth and Environmental Science Transactions of the Royal Society of Edinburgh , 79, 169-181. https://doi.org/10.1017/s026359330001419x
Zen, E. (1988) Phase Relations of Peraluminous Granitic Rocks and Their Petrogenetic Implications. Annual Review of Earth and Planetary Sciences , 16, 21-51. https://doi.org/10.1146/annurev.ea.16.050188.000321
Chappell, B.W. and White, A.J.R. (2001) Two Contrasting Granite Types: 25 Years Later. Australian Journal of Earth Sciences , 48, 489-499. https://doi.org/10.1046/j.1440-0952.2001.00882.x
Clarke, D.B. (2019) The Origins of Strongly Peraluminous Granitoid Rocks. The Canadian Mineralogist , 57, 529-550. https://doi.org/10.3749/canmin.1800075
Barbarin, B. (1999) A Review of the Relationships between Granitoid Types, Their Origins and Their Geodynamic Environments. Lithos , 46, 605-626. https://doi.org/10.1016/s0024-4937(98)00085-1
Zhang, R., Lu, J., Wang, R., Yang, P., Zhu, J., Yao, Y., et al. (2015) Constraints of in Situ Zircon and Cassiterite U-pb, Molybdenite Re-OS and Muscovite 40Ar-39Ar Ages on Multiple Generations of Granitic Magmatism and Related W-Sn Mineralization in the Wangxianling Area, Nanling Range, South China. Ore Geology Reviews , 65, 1021-1042. https://doi.org/10.1016/j.oregeorev.2014.09.021
Pouclet, A., Vidal, M., Doumnang, J.-C., Vicat, J.-P. and Tchameni, R. (2006) Neoproterozoic Crustal Evolution in Southern Chad: Pan-African Ocean Basin Closing, Arc Accretion and Late-to Post-Orogenic Granitic Intrusion. Journal of African Earth Sciences , 44, 543-560. https://doi.org/10.1016/j.jafrearsci.2005.11.019
Isseini, M., André-Mayer, A., Vanderhaeghe, O., Barbey, P. and Deloule, E. (2012) A-type Granites from the Pan-African Orogenic Belt in South-Western Chad Constrained Using Geochemistry, Sr-Nd Isotopes and U-Pb Geochronology. Lithos , 153, 39-52. https://doi.org/10.1016/j.lithos.2012.07.014
Seguem, N., Alexandre, G.A., Klötzli, U., Kepnamou, A.D. and Emmanuel, E.G. (2014) Petrography and Geochemistry of Precambrian Basement Straddling the Cameroon-Chad Border: The Touboro Baïbokoum Area. International Journal of Geosciences , 5, 418-431. https://doi.org/10.4236/ijg.2014.54040
Shellnutt, J.G., Yeh, M., Lee, T., Iizuka, Y., Pham, N.H.T. and Yang, C. (2018) The Origin of Late Ediacaran Post-Collisional Granites near the Chad Lineament, Saharan Metacraton, South-Central Chad. Lithos , 304, 450-467. https://doi.org/10.1016/j.lithos.2018.02.020
Djerossem, F., Berger, J., Vanderhaeghe, O., Isseini, M., Ganne, J. and Zeh, A. (2020) Neoproterozoic Magmatic Evolution of the Southern Ouaddaï Massif (Chad). BSGF - Earth Sciences Bulletin , 191, Article 34. https://doi.org/10.1051/bsgf/2020032
Diontar, M., Doumnang, J.C., Kwékam, M., Al-hadj Hamid, Z., Kagou Dongmo, A., Efon Awoum, J., et al. (2020) Petrogenesis of Magnesian High-K Granitoids from Bitkine (Centrechad Massif): Major and Trace Elements Constraints. European Journal of Environment and Earth Sciences , 1, 1-6. https://doi.org/10.24018/ejgeo.2020.1.5.78
Seguem, N., Diondoh, M., Kepnamou, A.D., Mama, N., Sami, M., Alexandre, G.A., et al. (2022) Petrography and Geochemistry of Baïbokoum-Touboro-Ngaoundaye Granitoids on the Chad-Cameroon-RCA Borders (Adamawa-Yade Domain). Open Journal of Geology , 12, 136-155. https://doi.org/10.4236/ojg.2022.122007
Assadi, A.O., Emmanuel, N.N. and Fadimatou, Y.N. (2022) Petrogenesis and Tectonic Setting of the Gold-Bearing Magmatic Rocks of the North-Western Melfi Massif, Central Chad. European Journal of Environment and Earth Sciences , 3, 23-31. https://doi.org/10.24018/ejgeo.2022.3.4.304
Castaing, C., Feybesse, J.L., Thiéblemont, D., Triboulet, C. and Chèvremont, P. (1994) Palaeogeographical Reconstructions of the Pan-African/Brasiliano Orogen: Closure of an Oceanic Domain or Intracontinental Convergence between Major Blocks? Precambrian Research , 69, 327-344. https://doi.org/10.1016/0301-9268(94)90095-7
Abdelsalam, M.G., Liégeois, J. and Stern, R.J. (2002) The Saharan Metacraton. Journal of African Earth Sciences , 34, 119-136. https://doi.org/10.1016/s0899-5362(02)00013-1
Isseini, M. (2011) Croissance et différenciation crustales au Néoprotérozoïque: Exemple du domaine panafricain du Mayo Kebbi au Sud-Ouest du Tchad. Thèse de Doctorat, Université Henri Poincaré, Nancy I (France), 342 p.
Abdelsalam, M.G., Gao, S.S. and Liégeois, J. (2011) Upper Mantle Structure of the Saharan Metacraton. Journal of African Earth Sciences , 60, 328-336. https://doi.org/10.1016/j.jafrearsci.2011.03.009
Nesbitt, H.W. and Young, G.M. (1984) Prediction of Some Weathering Trends of Plutonic and Volcanic Rocks Based on Thermodynamic and Kinetic Considerations. Geochimica et Cosmochimica Acta , 48, 1523-1534. https://doi.org/10.1016/0016-7037(84)90408-3
Potter, P.E., Maynard, J.B. and Depetris, P. (2005) Mud and Mudstones Introduction and Overview. Springer Science and Business Media, 296.
Fedo, C.M., Wayne Nesbitt, H. and Young, G.M. (1995) Unraveling the Effects of Potassium Metasomatism in Sedimentary Rocks and Paleosols, with Implications for Paleoweathering Conditions and Provenance. Geology , 23, 921-924. https://doi.org/10.1130/0091-7613(1995)023<0921:uteopm>2.3.co;2
Le Maitre, R.W. (1989) A Classification of Igneous Rocks and Glossary of Terms: Recommendations of the IUGS Subcommission on the Systematics of Igneous Rocks. Blackwell, 130-171.
Chappell, B.W. and White, A.J.R. (1992) I-and S-Type Granites in the Lachlan Fold Belt. Earth and Environmental Science Transactions of the Royal Society of Edinburgh , 83, 1-26. https://doi.org/10.1017/s0263593300007720
Frost, B.R., Barnes, C.G., Collins, W.J., Arculus, R.J., Ellis, D.J. and Frost, C.D. (2001) A Geochemical Classification for Granitic Rocks. Journal of Petrology , 42, 2033-2048. https://doi.org/10.1093/petrology/42.11.2033
Peccerillo, A. and Taylor, S.R. (1976) Geochemistry of Eocene Calc-Alkaline Volcanic Rocks from the Kastamonu Area, Northern Turkey. Contributions to Mineralogy and Petrology , 58, 63-81. https://doi.org/10.1007/bf00384745
Maniar, P.D. and Piccoli, P.M. (1989) Tectonic Discrimination of Granitoids. Geological Society of America Bulletin , 101, 635-643. https://doi.org/10.1130/0016-7606(1989)101<0635:tdog>2.3.co;2
Rickwood, P.C. (1989) Boundary Lines within Petrologic Diagrams Which Use Oxides of Major and Minor Elements. Lithos , 22, 247-263. https://doi.org/10.1016/0024-4937(89)90028-5
Sun, S.-S. and McDonough, W.F. (1989) Chemical and Isotopic Systematics of Oceanic Basalts: Implications for Mantle Composition and Processes. Geological Society , London , Special Publications , 42, 313-345. https://doi.org/10.1144/gsl.sp.1989.042.01.19
Ma, C., She, Z., Xu, P. and Wang, L. (2005) Silurian A-Type Granitoids in the Southern Margin of the Tongbai-Dabieshan: Evidence from SHRIMP Zircon Geochronology and Geochemistry. Science in China Series D : Earth Sciences , 48, 1134-1145. https://doi.org/10.1360/03yd0487
Bonin, B. (2007) A-Type Granites and Related Rocks: Evolution of a Concept, Problems and Prospects. Lithos , 97, 1-29. https://doi.org/10.1016/j.lithos.2006.12.007
Shellnutt, J.G., Denyszyn, S.W. and Pang, K. (2021) Editorial: Granite Petrogenesis and Geodynamics. Frontiers in Earth Science , 8, Article 637729. https://doi.org/10.3389/feart.2020.637729
Penaye, J., Kroner, A., Toteu, S.F., Van Schmus, W.R. and Doumnang, J. (2006) Evolution of the Mayo Kebbi Region as Revealed by Zircon Dating: An Early (ca. 740ma) Pan-African Magmatic Arc in Southwestern Chad. Journal of African Earth Sciences , 44, 530-542. https://doi.org/10.1016/j.jafrearsci.2005.11.018
Whalen, J.B., Currie, K.L. and Chappell, B.W. (1987) A-type Granites: Geochemical Characteristics, Discrimination and Petrogenesis. Contributions to Mineralogy and Petrology , 95, 407-419. https://doi.org/10.1007/bf00402202
Workman, R.K. and Hart, S.R. (2005) Major and Trace Element Composition of the Depleted MORB Mantle (DMM). Earth and Planetary Science Letters , 231, 53-72. https://doi.org/10.1016/j.epsl.2004.12.005
Li, H., Palinkaš, L.A., Watanabe, K. and Xi, X. (2018) Petrogenesis of Jurassic A-Type Granites Associated with Cu-Mo and W-Sn Deposits in the Central Nanling Region, South China: Relation to Mantle Upwelling and Intra-Continental Extension. Ore Geology Reviews , 92, 449-462. https://doi.org/10.1016/j.oregeorev.2017.11.029
Hofmann, C., Courtillot, V., Féraud, G., Rochette, P., Yirgu, G., Ketefo, E., et al. (1997) Timing of the Ethiopian Flood Basalt Event and Implications for Plume Birth and Global Change. Nature , 389, 838-841. https://doi.org/10.1038/39853
Condie, K.C. (2005) High Field Strength Element Ratios in Archean Basalts: A Window to Evolving Sources of Mantle Plumes? Lithos , 79, 491-504. https://doi.org/10.1016/j.lithos.2004.09.014
Wilson, W. (1989) Igneous Petrogenesis. Unwin Hyman, 373.
Siégel, C., Bryan, S.E., Allen, C.M. and Gust, D.A. (2018) Use and Abuse of Zircon-Based Thermometers: A Critical Review and a Recommended Approach to Identify Antecrystic Zircons. Earth - Science Reviews , 176, 87-116. https://doi.org/10.1016/j.earscirev.2017.08.011
Tchameni, R., Pouclet, A., Penaye, J., Ganwa, A.A. and 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, 511-529. https://doi.org/10.1016/j.jafrearsci.2005.11.017
Wu, D., Sun, F., Pan, Z. and Tian, N. (2020) Geochronology, Geochemistry, and Hf Isotopic Compositions of Triassic Igneous Rocks in the Easternmost Segment of the East Kunlun Orogenic Belt, NW China: Implications for Magmatism and Tectonic Evolution. International Geology Review , 63, 1011-1029. https://doi.org/10.1080/00206814.2020.1740895
Moyen, F., Laurent, O., Chelle-Michou, C., Couzinié, S., Vanderhaeghe, O., Zeh, A., et al. (2017) Collision Vs. Subduction-Related Magmatism: Two Contrasting Ways of Granite Formation and Implications for Crustal Growth. Lithos , 277, 154-177. https://doi.org/10.1016/j.lithos.2016.09.018
Asaah, A.V., Zoheir, B., Lehmann, B., Frei, D., Burgess, R. and Suh, C.E. (2014) Geochemistry and Geochronology of the ~620 Ma Gold-Associated Batouri Granitoids, Cameroon. International Geology Review , 57, 1485-1509. https://doi.org/10.1080/00206814.2014.951003
Altherr, R., Holl, A., Hegner, E., Langer, C. and Kreuzer, H. (2000) High-Potassium, Calc-Alkaline I-Type Plutonism in the European Variscides: Northern Vosges (France) and Northern Schwarzwald (Germany). Lithos , 50, 51-73. https://doi.org/10.1016/s0024-4937(99)00052-3
Doumnang, J.-C. (2006) La géologie des formations Néoprotérozoïques du Mayo-Kebbi (Sud-Ouest du Tchad). Thèse de Doctorat, Université d’Orléans, 206 p.
Pearce, J.A., Harris, N.B.W. and Tindle, A.G. (1984) Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic Rocks. Journal of Petrology , 25, 956-983. https://doi.org/10.1093/petrology/25.4.956
McDonough, W.F. and Sun, S.-S. (1995) The Composition of the Earth. Chemical Geology , 120, 223-253. https://doi.org/10.1016/0009-2541(94)00140-4