Mineral Chemistry of Pyroxene Gneiss in Obudu, SE Nigeria, and Its Petrological Significance

[1] Rahaman, M.A. (1988): Recent advances in the study of the basement complex of Nigeria. In: Precambrian Geology of Nigeria, Oluyide, P.O. (ed). Geological Survey of Nigeria Publication: Nigeria, pp. 11–43. RahamanM.A. 1988 Recent advances in the study of the basement complex of Nigeria In: Precambrian Geology of Nigeria OluyideP.O. (ed). Geological Survey of Nigeria Publication Nigeria 11 43 Search in Google Scholar

[2] Ekwueme, B.N. (2003): The Precambrian geology and evolution of southeastern Nigerian Basement Complex. University of Calabar Press: Calabar, 135 p. EkwuemeB.N. 2003 The Precambrian geology and evolution of southeastern Nigerian Basement Complex University of Calabar Press Calabar 135 p. Search in Google Scholar

[3] Dada, S.S. (2008): Proterozoic evolution of the Nigeria – Boborema province. In: West Gondwana: Pre-Cenozoic correlations across the South Atlantic region. Geological Society Special Publication: London, pp.121–136, DOI: 10.1144/SP294.7. DadaS.S. 2008 Proterozoic evolution of the Nigeria – Boborema province In: West Gondwana: Pre-Cenozoic correlations across the South Atlantic region Geological Society Special Publication London 121 136 10.1144/SP294.7 Open DOISearch in Google Scholar

[4] Ekwueme, B.N., Kröner, A. (2006): Single zircon ages of migmatitic gneisses and granulites in the Obudu Plateau: Timing of granulite-facies metamorphism in southeastern Nigeria. Journal of African Earth Sciences, 44 pp. 459–469, DOI: 10.1016/j.jafrearsci.2005.11.013. EkwuemeB.N. KrönerA. 2006 Single zircon ages of migmatitic gneisses and granulites in the Obudu Plateau: Timing of granulite-facies metamorphism in southeastern Nigeria Journal of African Earth Sciences 44 459 469 10.1016/j.jafrearsci.2005.11.013 Open DOISearch in Google Scholar

[5] Ugwuonah, E.N., Tsunogae, T., Ekwueme, B.N. (2019): Petrology and phase equilibrium modelling of granulites from Obudu in the Benin-Nigerian Shield, Southeastern Nigeria: Implications for clockwise P-T evolution in a collisional orogen. Mineralogy and Petrology, 113(3), pp. 353–368, DOI: 10.1007/s00710-019-00652-4. UgwuonahE.N. TsunogaeT. EkwuemeB.N. 2019 Petrology and phase equilibrium modelling of granulites from Obudu in the Benin-Nigerian Shield, Southeastern Nigeria: Implications for clockwise P-T evolution in a collisional orogen Mineralogy and Petrology 113 3 353 368 10.1007/s00710-019-00652-4 Open DOISearch in Google Scholar

[6] Ukwang, E.E., Ekwueme, B.N., Horsley, R.J. (2003): Petrology of granulite facies rocks in Ukwortung area of Obudu Plateau, Southeastern Nigeria. Global Journal of Geological Sciences, 1(2), pp. 159–167. UkwangE.E. EkwuemeB.N. HorsleyR.J. 2003 Petrology of granulite facies rocks in Ukwortung area of Obudu Plateau, Southeastern Nigeria Global Journal of Geological Sciences 1 2 159 167 Search in Google Scholar

[7] Dada, S.S. (1998): Crust-forming ages and proterozoic crustal evoluton in Nigeria: a reappraisal of current interpretations. Precambrian Research, 87(1–2), pp. 65–74, DOI: 10.1016/S0301-9268(97)00054-5. DadaS.S. 1998 Crust-forming ages and proterozoic crustal evoluton in Nigeria: a reappraisal of current interpretations Precambrian Research 87 1–2 65 74 10.1016/S0301-9268(97)00054-5 Open DOISearch in Google Scholar

[8] Ukwang, E.E., Ekwueme, B.N., Kröner, A. (2012): Single zircon evaporation ages: Evidence for the Mesoproterozoic crust in the southeastern Nigerian basement complex. Chinese Journal of Geochemistry, 31(1), pp. 48–54, DOI: 10.1007/s11631-012-0548-4. UkwangE.E. EkwuemeB.N. KrönerA. 2012 Single zircon evaporation ages: Evidence for the Mesoproterozoic crust in the southeastern Nigerian basement complex Chinese Journal of Geochemistry 31 1 48 54 10.1007/s11631-012-0548-4 Open DOISearch in Google Scholar

[9] Leake, B., Woolley, A., Arps, C., Birch, W., Gilbert, M., Grice, J., Hawthrone, F., Kato, A., Kisch, H., Krivovichev, V., Linthout, K., Laird, J., Mandarino, J., Maresch, W., Nickel, E., Rock, N., Schumacher, J., Smith, D., Stephenson, N., Ungaretti, L., Whittaker, E., Youzhi, G. (1997): Nomenclature of amphiboles: Report of the subcommittee on amphiboles of the International Mineralogical Association, commission on new minerals and mineral names. The Canadian Mineralogist, 35(1), 219–246. LeakeB. WoolleyA. ArpsC. BirchW. GilbertM. GriceJ. HawthroneF. KatoA. KischH. KrivovichevV. LinthoutK. LairdJ. MandarinoJ. MareschW. NickelE. RockN. SchumacherJ. SmithD. StephensonN. UngarettiL. WhittakerE. YouzhiG. 1997 Nomenclature of amphiboles: Report of the subcommittee on amphiboles of the International Mineralogical Association, commission on new minerals and mineral names The Canadian Mineralogist 35 1 219 246 Search in Google Scholar

[10] Spear, F.S. (1993): Metamorphic Phase Equilibria and Pressure-Temperature-Time Paths. Mineralogical Society of America: Washington, D.C, 799 p. SpearF.S. 1993 Metamorphic Phase Equilibria and Pressure-Temperature-Time Paths Mineralogical Society of America Washington, D.C 799 p. Search in Google Scholar

[11] Bucher, K., Grapes R. (2011): Petrogenesis of Metamorphic Rocks. Springer: Berlin, Heidelberg, 428 p. BucherK. GrapesR. 2011 Petrogenesis of Metamorphic Rocks Springer Berlin, Heidelberg 428 p. Search in Google Scholar

[12] Holland, T., Blundy, J. (1994): Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry. Contributions to Mineralogy and Petrology, 116(4), 433–447, DOI: 10.1007/BF00310910. HollandT. BlundyJ. 1994 Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry Contributions to Mineralogy and Petrology 116 4 433 447 10.1007/BF00310910 Open DOISearch in Google Scholar

[13] Frost, B.R. (1991): Stability of oxide minerals in metamorphic rocks. In: Oxide Minerals: Petrologic and Magnetic Significance, Lindsley, D.H. (ed). DeGruyter: Berlin, pp. 469–488. FrostB.R. 1991 Stability of oxide minerals in metamorphic rocks In: Oxide Minerals: Petrologic and Magnetic Significance LindsleyD.H. (ed). DeGruyter Berlin 469 488 Search in Google Scholar