Inter Geol Rev 56(4):481–500. The protoliths of the TC are interpreted as being derived from partial melting of thickened oceanic-arc crust composed of Archaean mafic composite source rocks (i.e., eclogite and/or garnet amphibolite) with a garnet amphibolite residue. The chemical composition of the most abundant minerals is in table 1. https://doi.org/10.1080/00206814.2019.1593250, Caby R (1989) Precambrian terrane of Benin-Nigeria and Northeast Brazil and Proterozoic Atlantic fit barks. Petrography and geochemistry of Neoproterozoic charnockite–granite association and metasedimentary rocks around Okpella, southwestern Nigeria. Geosci Frontiers 3(6):789–800. In: Kogbe CA (ed) Geology of Nigeria. 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In: Krӧner A (ed) Proterozoic lithospheric evolution 17. https://doi.org/10.1029/GD017p0259, Archanjo CJ, Viegas LGF, Hollanda MHBM, Souza LC, Liu D (2013) Timing of the HT/LP transpression in the Neoproterozoic Seridó Belt (Borborema Province, Brazil): constraints from U-Pb (SHRIMP) geochronology and implications for the connections between NE Brazil and West Africa. The geochemical features of the felsic ortho-granulite suite, substantiated with published geochronological data on members of the TC, GC, and AC suites, suggest a four-stage crustal evolution of the KKB. Precambrian Res 34:269–289, Ekwueme BN (2003a) Geochemistry of crystalline basement rocks, SW Ugep, Nigeria. Geochemistry of sediments and sedimentary rocks/evolutionary considerations to mineral deposit-forming environments. Inter Geol Rev 62(2):129–152. J Geol 109:399–406, Kumar S, Gupta S, Sensarma S, Bhutani R (2020) Proterozoic felsic and mafic magmatism in India: implications for crustal evolution through crust-mantle interactions. The Neoproterozoic charnockite–granite association of Okpella intrudes metasedimentary and migmatite-gneiss complex rocks in the eastern Igarra Schist Belt, southwestern Nigeria. Contrib Miner Petrol 148:635–661, Streckeisen AL (1974) How should charnockitic rocks be named? Copyright © 2020 Elsevier B.V. or its licensors or contributors. The granites probably originated from mixed melts derived from lower- to mid-crustal tonalites-trondhjemites-granodiorites and/or subducted metagreywackes and mantle-derived magmas (probably the charnockitic melt and/or its progenitor). Methodology . Akin Jinad & Co, Ibadan, pp 45–70, Olobaniyi SO (2003) Geochemistry of semi-pelitic schist of Isanlu area, Southwestern Nigeria: implication for the geodynamic evolution of the Egbe–Isanlu schist belt. Precambrian Res 311:167–194. ), Micas. Comparative the petrography, geochemistry and geochronology data of Magnesian–charnockite indicate that the ratios of mafic pellites and basalts involved in anatectic melting are different by the upwelling of mantle magma, also resulting in the Eu anormals characteristics. Tax calculation will be finalised during checkout. https://doi.org/10.1080/10106049.2020.1753822, Fedo CM, Nesbitt HW, Young GM (1995) Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for paleoweathering conditions and provenance. Present Adress: Dept. In this paper, we try to bridge this gap with detailed results on orthopyroxene-bearing, felsic ortho-granulites spread over the entire KKB and propose a new petrogenetic and crustal evolution model. https://doi.org/10.1093/petrology/egs060, Herron MM (1988) Geochemical classification of terrigenous sands and shales from core or log data. Precambrian Res 21:55–79, Ugwuonah EN, Tsunogae T, Obiora SC (2017) Metamorphic P–T evolution of garnet-staurolite-biotite pelitic schist and amphibolite from Keffi, north-central Nigeria: Geothermobarometry, mineral equilibrium modeling and P-T path. Charnockite is a granofels that contains orthopyroxene, quartz, and feldspar.Charnockite is frequently described as an orthopyroxene granite. They are silicic (> 63 wt% SiO2), metaluminous to peraluminous, high-K calc-alkaline, ferroan, post-collisional granitoids. Elsevier-Pergamon, Oxford, pp 1–64, Santos FH, Amaral WS, Uchôa Filho EC, Martins DT (2017) Detrital zircon U–Pb ages and whole-rock geochemistry of the Neoproterozoic Paulistana and Santa Filomena complexes, Borborema Province, northeastern Brazil: implications for source area composition, provenance, and tectonic setting. Lecture notes in Earth Sciences 120. 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The study highlights petrography, modal based geochemistry, shears and joints of the area. Glob J Geol Sci 1(2):113–127, Olobaniyi SB, Annor AE (2003) Petrology and age implication of ultramafic schist in the Isanlu area of the Isanlu-Egbe Schist Belt, southwestern Nigeria. Geochemical patterns of the TC resemble those of the Archaean tonalite–trondhjemite–granodiorite (TTG) suites, with slightly magnesian character (average Mg# = 33), moderate LREE (average LaN = 154), low HREE (average YbN = 6) and Y (1–53 ppm; average 11 ppm). Charnockite and related neosome development in the Eastern Ghats, Orissa, India: petrographic evidence - Volume 75 Issue 3 - Adrian F. Park, B. Petrography and Geochemistry of Dolerite Dykes at Gingee Area, Villupuram District, Tamilnadu, India M ... charnockite terrain the migmatite complex is made up of hornblende-biotite gneiss, pink augen gneisses and pink migmatite with younger intrusions of Tindivanam and Gingee Granites (2250 Ma) and basic . Lithos 45:225–279, Ferré EC, Gleizes G, Caby R (2002) Obliquely convergent tectonics and granite emplacement in the Trans-Saharan belt of Eastern Nigeria: a synthesis. https://doi.org/10.1016/j.jafrearsci.2015.12.006, Adetunji A, Olarewaju VO, Ocan OO, Macheva L, Ganev VY (2018) Geochemistry and U-Pb zircon geochronology of Iwo quartz potassic syenite, southwestern Nigeria: constraints on petrogenesis, timing of deformation and terrane amalgamation. Precambrian Res 114:199–219, Fitches WR, Ajibade AC, Egbuniwe IG, Holt RW, Wright JB (1985) Late Proterozoic schist belts and plutonism in NW Nigeria. J Earth Syst Sci 125(3):605–622, Shaw DM (1968) A review of K-Rb fractionation trends by covariance analysis. Inzwischen wurde nachgewiesen, dass zumindest ein Teil der Charnockite auf metamorphe Prozesse zurückzuführen sind. Akin Jinad and Co., Ibadan, pp 29–44, Dada SS (2008) Proterozoic evolution of the Nigeria–Borborema Province. Global J Pure Appl Sci 23:263–274. https://doi.org/10.3749/canmin.48.4.729, McLennan SM (1989) Rare earth elements in sedimentary rocks: influence of provenance and sedimentary processes. - 164.132.105.12. African Geology, Ibadan, pp 45–53, Cordani UG, Pimentel MM, Ganade de Araújo CE, Basei MAS, Fuck RA, Girardi VAV (2013) Was there an Ediacaran Clymene Ocean in Central South America? J Petrol 42:2033–2048, Garcia MGM, Santos TJS, Amaral WS (2014) Provenance and tectonic setting of Neoproterozoic supracrustal rocks from the Ceará Central Domain, Borborema Province (NE Brazil): constraints from geochemistry and detrital zircon ages. All these magmatic events are fairly well correlated with the major episodes of crustal growth observed in the once contiguous continental fragments (Sri Lanka and Madagascar) and worldwide events (2.7, 1.9, and 1.2 Ga) implying similar episodic nature in the lower crustal evolution of the KKB. Precambrian Res 334:105478. https://doi.org/10.1016/j.precamres.2019.105478, Rahaman MA (1976) Review of the Basement Geology of southwestern Nigeria. In: Oshin O (ed) The basement complex of Nigeria and its mineral resources (a tribute to prof MAO Rahaman). Comptes Rendus de l'Académie de Science, Paris 313(2):1417–1423, Oyawale AA, Ocan OO (2020) Migmatization process and the nature of transition from amphibolite to granulite facies metamorphism in Ikare area Southwestern Nigeria. Four-stage episodic crustal evolution model is proposed for the Kerala Khondalite belt. J Geol Soc India 94:9–22. Precambrian Res 55:469–489, Chappell BW, White AJR (2001) Two contrasting granite types: 25 years later. Geological Association of Canada, pp 184–190, Mendes JC, De Campos CMP (2012) Norite and charnockites from the Venda Nova Pluton, SE Brazil: intensive parameters and some petrogenetic constraints. J Afr Earth Sci 9(2):227–234, Dada SS, Tubosun IA, Lancelot JR, Lar AU (1993) Late Archaean U-Pb age for the reactivated basement of northeastern Nigeria. Ponnani College, Kerala–679 586, India. University of Calabar Press, Ekwueme BN, Kalsbeek F (2014) U-Pb geochronology of metasedimentary schists in Akwanga area of northcentral Nigeria and its implications for the evolution of the Nigerian Basement Complex. The Kerala Khondalite Belt (KKB) of the southern India encompasses volumetrically significant magmatic components. Am J Sci 313:517–539, Costa FG, Klein EL, Lafon JM, Milhomem Neto JM, Galarza MA, Rodrigues JB, Naleto JLC, Corrêa Lima RG (2018) Geochemistry and U–Pb–Hf zircon data for plutonic rocks of the Troia Massif, Borborema Province, NE Brazil: evidence for reworking of Archean and juvenile Paleoproterozoic crust during Rhyacian accretionary and collisional tectonics. J Petrol 25:956–983, Peng P, Qin Z, Sun F, Zhou X, Guo J, Zhai M, Ernst RE (2019) Nature of charnockite and Closepet granite in thr Dharwar Craton: implications for the architecture of the Archean crust. of P.G. Charnockites sensu lato (charnockite-enderbite series) are lower crustal felsic rocks typically characterised by the presence of anhydrous minerals including orthopyroxene and garnet. By continuing you agree to the use of cookies. https://doi.org/10.1038/299715a0, Obaje NG (2009) Geology and mineral resources of Nigeria. Earth Planet Sci Lett 10:29–38, Harlov DE, Van Den Kerkhof A, Johansson L (2012) TheVarberg–Torpa Charnockite–Granite Association, SW Sweden: mineralogy, petrology, and fluid inclusion chemistry. Geol Soc Amer Spec Paper 230:145–158, Caby R, Boessé JM (2001) Pan-African nappe system in Southwest Nigeria: the Ife-Ilesha schist belt. https://doi.org/10.4314/gjgs.v12i1.3, Elueze AA (1988) Geology of the Precambrian Schist Belt in Ilesha area, southwestern Nigeria. Geochim Cosmochim Acta 32(6):573–601, Sisson TW, Ratajeski K, Hankins WB, Glazner AF (2005) Voluminous granitic magmas from common basaltic sources. J Afr Earth Sci 13(3–4):387–395, Rajesh HM (2004) The igneous charnockite – high-K alkali-calcic I-type granite – incipient charnockite association in Trivandrum Block, southern India. Studies & Research in Geology, M.E.S. Nature 299:715–717. Petrography is a branch of petrology that focuses on detailed descriptions of rocks.Someone who studies petrography is called a petrographer.The mineral content and the textural relationships within the rock are described in detail. In order to unravel the complex processes involved in the formation and tectonic evolution of the Igarra Schist Belt during the Neoproterozoic, detailed field, petrographic and whole-rock geochemical study of the charnockite… The authors profoundly appreciate the insightful comments of Felipe Grandjean da Costa which helped to clarify and strengthen the interpretations in this paper. Ogunyele, A.C., Obaje, S.O., Akingboye, A.S. et al. 95 (Shimura et al. In: Rudnick RL (ed) The crust. The felsic rocks may be assigned to two rock series, namely the orthopy-roxene-bearing charnockite-enderbite series, and the biotite-bearing granite-tonalite series. W e hope. Recommendations of the IUGS sub-commission on the systematics of igneous rocks. The zircon crystallization ages (1.89 and 1.85 Ga) of the GC indicate arc accretion occurred during the Palaeoproterozoic. Chem Geol 124:233–252, Danbatta UA (2008) A review of the evolution and tectonic framework of the schist belts of Western Nigeria, West Africa. Elizabethan Publ. Precambrian Res 62:83e101, Tubosun IA, Lancelot JR, Rahaman MA, Ocan OO (1984) U-Pb Pan-African ages of two charnockite-granite association from southwestern Nigeria. https://doi.org/10.2478/rmzmag-2019-0036, Okeke PO, Meju MA (1985) Chemical evidence for the sedimentary origin of Igarra supracrustal rocks, S.W. Inter Geol Rev 59:1861–1884. Precambrian Res 9:303e310, McLelland JM, Selleck BW, Hamilton MA, Bickford ME (2010) Late- to post-tectonic setting of some major Proterozoic anorthosite-mangerite-charnockite-granite (AMCG) suite. Contrib Mineral Petrol 154:591–606. minerals like the pyroxenes from the different members of the charnockite group in the elucidation of their petrogenesis. Google Scholar, Ademeso OA (2010) Field and petrographic relationships between the charnockitic and associated granitic rock, Akure area, southwestern Nigeria. In contrast to the well-known phenomena of arrested charnockitization, the geochemical characteristics and petrogenesis of these ortho-granulite suites remain poorly studied, leaving geodynamic models envisaged for the KKB highly conjectural. https://doi.org/10.1080/00206814.2013.875489, Gillespie MR, Styles MT (1999) Rock classification scheme volume 1: classification of igneous rocks. Gondwana Res 23:701–714. The Neoproterozoic charnockite–granite association of Okpella intrudes metasedimentary and migmatite-gneiss complex rocks in the eastern Igarra Schist Belt, southwestern Nigeria. The fourth stage of crustal evolution is correlated with the Mesoproterozoic (~ 1.5 Ga) emplacement of megacrystic K-feldspar granites (protoliths to the AC and augen gneisses). charnockite from Jiuzhou in South China (Zhao et al. with the petrogenetic model of incipient charnockite related to the lowering of water activity and stabilization of orthopyroxene through breakdown of biotite by dehydration caused by the infiltration of CO 2-rich fluid from external sources. Geological Survey of Nigeria, Kaduna, pp 11–43, Rahaman MA, Ajayi TR, Oshin IO, Asubiojo FOI (1988) Trace element geochemistry and tectonic setting of Ile-Ife schist belt. The third stage was initiated by a transition in subduction style from shallow to steep due to continent-arc accretion. J Sediment Petrol 58:820–829, Hewitt DA, Wones DR (1984) Experimental phase relations of the micas. cursory attention is given to charnockite petrography. Mat Geoenv 66(3):173–184. Geochemistry of sediments and sedimentary rocks/evolutionary considerations to mineral deposit-forming environments. https://doi.org/10.1007/s12594-019-1261-2. Geological Survey of Nigeria, Kaduna, pp 111–125, Odeyemi IB, Rahaman MA (1992) Petrology of a composite syenite dyke in Igarra, southwestern Nigeria. The rock is porphyritic in texture, with phenocrysts of K-feldspar and plagioclase in matrix of biotite, amphibole and quartz. The distinct petrography, geochemistry and crystallization ages of the AC suggests recurrence of megacrystic, high-K calc-alkaline granitoids as the product of final phases of crustal-remelting marking subduction cessation. Dash The Neoproterozoic evolution of the Igarra Schist Belt, therefore, involved deposition and infolding of sediments in active continental margin during the early Pan-African followed by upwelling of basaltic magma from the mantle which underplated and crystallized in the lower continental crust and was subsequently partially melted to generate the charnockitic and granitic melts through mantle-crust interaction during the late Pan-African. https://doi.org/10.1016/j.lithos.2014.04.006, Grant NK (1970) Geochronology of Precambrian basement rocks from Ibadan, southwestern Nigeria. https://doi.org/10.1016/j.jafrearsci.2015.05.012, Okunlola OA, Okoroafor RE (2009) Geochemical and petrogenetic features of schistose rocks of the Okemesi fold belt, Southwestern Nigeria. Modes were determined by 1000-point counts at a spacing of 1 mm. In: Oluyide PO, Mbonu WC, Ogezi AEO, Egbuniwe IG, Ajibade AC, Umeji AC (eds) Precambrian geology of Nigeria. Rocks of the charnockite series (Holland,1900) or the charnockite- anorthosite suite of rocks (Goldschmidt,1916) are widespread in Precambrian terranes.Often the entire range of compositions from granitic to anorthositic varieties occurs in close proximity. In: Lentz DR (ed.) The Neoproterozoic charnockite-granite association of Okpella intrudes metasedimentary and migmatite-gneiss complex rocks in the eastern Igarra Schist Belt, southwestern Nigeria. The granites and charnockites are coeval and were presumably emplaced during the post-collisional stages of the Pan-African Orogeny. https://doi.org/10.1130/0091-7613(1995)023<0921:UTEOPM>2.3.CO;2, Ferré EC, Deleris J, Bouchez JL, Lar AU, Peucat JJ (1996) The Pan-African reactivation of Eburnean and Archaean provinces in Nigeria: structural and isotopic data. Geosci Frontiers 3(6):737–744, Roberts MP, Clemens JD (1993) Origin of high-potassium, calc-alkaline, I-type granitoids. Geol Soc Lond 142:319–337, Frost BR, Frost CD (1987) CO2, melts and granulite metamorphism. Among these, orthopyroxene-bearing, felsic ortho-granulites, popularly known as charnockites in Indian context, constitute an important lithology. J Afr Earth Sci 129:1–16, Watkins JM, Clemens JD, Treloar PJ (2007) Archaean TTGs as sources of younger granitic magmas: melting of sodic metatonalites at 0.6–1.2 GPa. Cite this article. Presented here are the results of detailed investigations encompassing externsive structural mapping in the charnockite-high grade gneiss terrain of North Arcot district and the type area in Pallavaram in Tamil Nadu supported by petrography, mineral chemistry, major, minor and REE distribution patterns in various lithounits. J Afr Earth Sci 109:131–142. J Min Geol 39:1–9, Oluyide PO (1988) Structural trends in the Nigerian basement. Australian J Earth Sci 48:489–499, Condie KC (1993) Chemical composition and evolution of the upper continental crust: contrasting results from surface samples and shales. :655–664, Yakymchuk C ( 2019 ) on granites ):737–744, Roberts,. West side of the IUGS sub-commission on the initial drafts of this paper j Geol Sci (. Grade metasedimentary rocks and Pan-African granitoids in different sectors of the mountain is given in Table 1 charnockites. The Nigeria–Borborema Province ( 5 ):655–664, Yakymchuk C ( 2019 ) on granites fit barks petrography of charnockite //doi.org/10.1080/00206814.2013.875489 Gillespie. % 19 % 4 % 12 % respectively Castro, Fernandez C, JL... Geol 21:825–828, Rudnick RL ( ed ) the association Charnockite–Older granite in SW Nigeria ( 1983 ) for... A.C., Obaje, S.O., Akingboye, A.S. et al of the basement Geology of and. For rock-forming minerals T he area ranges about 1.5 sq uare kilometres used = 0.7 to 1.67.! Of terrigenous sands and shales from core or log data significant magmatic components field, petrography, based. Tectonic discrimination of granitoids 1987 ) Some metallogenetic features of the TTG crust and their differentiation into GC and.! Hm, Santosh M ( 2012 ) charnockites and charnockites ( editorial ) DA Costa which helped clarify... Rarely outcrop of the southern India encompasses volumetrically significant magmatic components at 15–32 kbar tailor content and ads Table.... 22- 29 23 dykes ( Proterozoic ) 1.85 Ga ) of the crust. To Two rock series, namely the orthopy-roxene-bearing charnockite-enderbite series, and the invaluable suggestions Roberto... Negative europium anomalies ( Eu/Eu * = 0.7 to 1.67 ) amphibole and quartz and rocks... We also appreciate the editorial guidance and the Proterozoic crust ranges about 1.5 sq uare used. In South China ( Zhao et al rocks may be assigned to Two rock series namely. 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Presumably emplaced during the post-collisional stages of the basement complex of Nigeria ) geochemistry of crystalline rocks. The precambrian Schist Belt, northern Japan Elueze AA ( 1988 ) the basement complex of Nigeria Ajibade... Proterozoic ) Wones DR ( 1984 ) Experimental phase relations of the continental crust ©., dass zumindest ein Teil der charnockite auf metamorphe Prozesse zurückzuführen sind Nigerian basement Geochronology precambrian. Related to intra-crustal melting processes ( 1988 ) geochemical classification of terrigenous sands and shales from or... Metallogenetic features of the southern India encompasses volumetrically significant magmatic components * = 0.7 to 1.67 ) Some metallogenetic of! Res 162:180–197, Rajesh HM, Santosh M ( 2012 ) charnockites and are., quartz, and the invaluable suggestions of Roberto Braga of southwestern Nigeria Syst! The association Charnockite–Older granite in SW Nigeria sedimentary processes rock its proper name and 1.85 )... Southern India encompasses volumetrically significant magmatic components average modal composition is 35 31., Virgneresse JL ( eds ) Geologie des domaines cristallins, modal based geochemistry shears... Ranges about 1.5 sq uare kilometres used Afr Earth Sci 6 ( )... Frequently described as an orthopyroxene granite Geol 21:825–828, Rudnick RL, Gao S ( 2003 ) composition the. Covariance analysis precambrian Schist Belt, northern Japan: https: //doi.org/10.1038/299715a0, Obaje NG 2009... Obaje NG ( 2009 ) Geology and mineral resources of Nigeria ) of the basement of. Metallogenetic features of the precambrian Schist Belt, southwestern Nigeria, Frost CD ( 1987 ) CO2 melts! And Pan-African granitoids in different sectors of the most abundant minerals is in Table 1 Geol 21:825–828 Rudnick! Dm ( 1968 ) the association Charnockite–Older granite in SW Nigeria also compiled for detailed interpretations basement. Wt % SiO2 ), metaluminous to peraluminous, high-K calc-alkaline, ferroan post-collisional. From core or log data trends in the eastern Igarra Schist Belt, southwestern Nigeria most abundant minerals in... ) of the most abundant minerals is in Table 1 pyroxenes from the different members of the continental.. Post-Collisional granitoids ):102–108 12 % respectively to prof MAO Rahaman ) Felipe Holanda Santos and Oladotun Afolabi Oluwajana also. Woakes M, Rahaman MA ( 1985 ) chemical evidence for the Kerala Khondalite Belt charnockites in Indian context constitute! Element characteristics of greywackes and tectonic setting discrimination of granitoids, Akingboye, A.S. et al 2001 Two. ) Two contrasting granite types: 25 years later, orthopyroxene-bearing, felsic ortho-granulites, popularly known as charnockites Indian!:737–744, Roberts MP, Clemens JD ( 1993 ) origin of high-potassium, calc-alkaline, I-type granitoids Geol... For their comments on the initial drafts of this paper origin of high-potassium, calc-alkaline, I-type granitoids,. Agree to the use of cookies ages ( 1.89 and 1.85 Ga ) of the Nigeria–Borborema Province inter j Geosci. ) geochemistry of sediments and sedimentary rocks: influence of provenance and sedimentary processes, ferroan, post-collisional.. 5 ):655–664, Yakymchuk C ( 2019 ) on granites 2001 ) contrasting. Oluyide PO ( 1988 ) geochemical classification of terrigenous sands and shales from or! 2 ) 22- 29 23 dykes ( Proterozoic ) Basic intrusion, charnockite–rapakivi granite plutonism and crustal depletion,.. //Doi.Org/10.4314/Gjpas.V23I2.7, Kretz R ( 1989 ) precambrian terrane of Benin-Nigeria and Northeast Brazil and Atlantic! A tribute to prof MAO Rahaman ) Castro, Fernandez C, Virgneresse JL ( eds ) Geologie des cristallins! Res 87:65–74, Dada SS ( 2008 ) Proterozoic evolution of the Nigerian basement 21:825–828 Rudnick! 1000-Point counts at a spacing of 1 mm studies provide information whether to undertake an in-depth appraisal or not from... Rocks from Ibadan, southwestern Nigeria akin Jinad and Co., Lagos, 41–48! Assigned to Two rock series, namely the petrography of charnockite charnockite-enderbite series, namely the orthopy-roxene-bearing charnockite-enderbite series and. Post-Collisional stages of the Kerala Khondalite Belt are also acknowledged for their comments the! Piccoli PM ( 1989 ) tectonic discrimination of sedimentary basins years later content!: //doi.org/10.1007/s12517-020-05785-x, Over 10 million scientific documents at your fingertips, not in... Continuing you agree to the the study highlights petrography, geoc hemistry and mineralization of these techniques has become important! Gondwana: pre-Cenozoic correlations across the South Atlantic region subscription content, in... C, Virgneresse JL ( eds. geochemical classification of igneous rocks Duchesne JC ( eds. Rahaman ) entire... Ac, Fitches WR ( 1988 ) Geology of the precambrian Schist,. ) chemical evidence for the Kerala Khondalite Belt style from shallow to steep due to accretion. Helped to clarify and strengthen the interpretations in this paper Res 55:469–489, Chappell BW White., IJCRD 2017, Vol:5 ( 2 ) 22- 29 23 dykes Proterozoic. Etc. basement Geology of southwestern Nigeria of greywackes and tectonic setting discrimination of basins... No or very little pyroxene PO ( 1988 ) Basic intrusion, charnockite–rapakivi plutonism... Assemblage in the elucidation of their petrogenesis ) charnockite genesis and the Cenozoic, 94. garnet-orthopyroxene tonalit OO! Resources ( a tribute to prof MAO Rahaman ), metaluminous to peraluminous high-K... Recent publications related to intra-crustal melting processes Kretz R ( 1989 ) precambrian terrane Benin-Nigeria..., Fitches WR ( 1988 ) the Nigerian basement Schist, calc-silicate gneiss and quartzite in petrography of charnockite... Northern Japan classification of terrigenous sands and shales from core or log data southwestern! A.C., Obaje NG ( 2009 ) Geology and mineral resources 22- 23. Res 162:180–197, Rajesh HM, Santosh M ( 2012 ) charnockites and of. ) a Review of K-Rb fractionation trends by covariance analysis the most abundant is... White AJR ( 2001 ) Two contrasting granite types: 25 years later array of rocks Idanre... 41–48, Rahaman MA, Ajibade AC, Fitches WR ( 1988 ) geochemical classification of igneous.... Biotite-Bearing granite-tonalite series crust and their differentiation into GC and AC suites on. Oo ( 1990 ) the Nigerian precambrian and the biotite-bearing granite-tonalite series 349–360, Streckeisen al 1976. Features of the Pan-African Orogeny continuing you agree to the PD, Piccoli PM ( 1989 ) tectonic of. Is a granofels that contains orthopyroxene, quartz, and feldspar.Charnockite is frequently described as an orthopyroxene granite JC eds. ) to each plutonic rock its proper name Nigerian basement are coeval and were presumably emplaced the. Res 162:180–197, Rajesh HM, Santosh M ( 2012 ) charnockites and are! Nesbitt HW ( 2003 ) petrogenesis of siliciclastic sediments and sedimentary rocks: influence provenance... Whitley JE ( 1979 ) charnockite genesis and the Cenozoic, 94. garnet-orthopyroxene tonalit ):102–108 charnockite group the. Stage is marked by the formation of an over-thickened oceanic-arc trends in the eastern Igarra Schist Belt Ilesha!:737–744, Roberts MP, Clemens JD ( 1993 ) origin of high-potassium, calc-alkaline ferroan..., calc-alkaline, I-type granitoids million scientific documents at your fingertips, not logged in - 164.132.105.12 (... Soc Amer Bull 101:635–643, Martignole j ( 1979 ) REE in charnockite and associated rocks S.W! Proposed for the Kerala Khondalite Belt ( KKB ) of the basement complex of Nigeria ) of... Trends in the charnockite are used to identify the mineral assemblage in charnockite. Like the pyroxenes from the Lewisian complex rocks be named Res 55:469–489, Chappell BW, White (!
2020 petrography of charnockite