Mineralogy and Geochemistry of Hydrothermally altered Talcose rocks from Ila Orangun-Oyan areas, part of Southwestern Nigeria

V B Omotunde  lowast; A S Olatunji; O A Ehinola; O A Afolabi; M O AbdusSalam; O J Olajide Kayode  nbsp

doi:10.17485/IJST/v13i40.1686

Article

Mineralogy and Geochemistry of Hydrothermally altered Talcose rocks from Ila Orangun-Oyan areas, part of Southwestern Nigeria

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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v13i40.1686

Year: 2020, Volume: 13, Issue: 40, Pages: 4244-4261

Original Article

Mineralogy and Geochemistry of Hydrothermally altered Talcose rocks from Ila Orangun-Oyan areas, part of Southwestern Nigeria

V B Omotunde^1∗, A S Olatunji² , O A Ehinola³ , O A Afolabi⁴ , M O AbdusSalam^1,5, O J Olajide-Kayode⁶

¹Researcher, Department of Geosciences, Pan African University Life and Earth Science Institute, University of Ibadan, Ibadan, Nigeria. Tel.: +234-8136137432
² Associate professor, Department of Geology, University of Ibadan, Ibadan, Nigeria
³ Professor, Department of Geology, University of Ibadan, Ibadan, Nigeria
⁴ Lecturer, Department of Earth Sciences, Ladoke Akintola University of Technology, Ogbomosho, Nigeria
⁵ Lecturer, Department of Geology, The Polytechnic Ibadan, Ibadan, Nigeria
⁶ Lecturer, Department of Geology, Osun State University, Osogbo, Nigeria

∗ Corresponding author:
Tel: +234-8136137432
[email protected]

Received Date:16 August 2020, Accepted Date:22 October 2020, Published Date:20 November 2020

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Background/Objectives: Talcose rocks within Precambrian Basement Complex serve as relics of Archean greenstones. alterations associated with polycyclic-orogenies that affected this complex is studied to understand mineralogical and geochemical alterations. Methods: Five fresh samples of talcose rocks were collected during field mapping. These samples were cut into thin sections to reveal modal mineralogy, altered minerals and degree of alteration of such minerals. Mineral phase identification of the talcose rocks was conducted using X-ray Broker D8 ADVANCE diffractometer while whole rock analysis was carried out using Inductively Coupled Plasma Mass Spectrometry. Findings: Lithological relationship revealed from field evidence showed that the talc bodies occurred in close association with micaceous schist. The mineral assemblage of talc, tremolite, actinolite, chlorite and calcite suggest low grade greenschist metamorphic facies from possible hydrothermal alteration. Geochemical results revealed the following range of concentrations; SiO₂ 42.19-59.03%; Al₂O₃ 1.1 - 11.8%; Fe₂O₃ 7.64-9.56%; MgO 24.47-26.639%; Ni 594-1207ppm; Co 43.2-113.9ppm; Sn 6-41ppm; V 32-75ppm and Zr 1.3-58.7ppm, and these are typical of talcose rocks. Petrogenetic studies suggest a komatiitic origin with a peridotitic komatiite precursor for the talc-chlorite-tremolite schist. Enrichment in LREE, depletion in HREE and a negative Eu anomaly suggest alteration of the parent magma for the talcose rock and plagioclase fractionation. The trends observed for the LILE, HFSE and REE suggest possible contamination or mixing of crustal and mantle materials during the formation of the protolith. Ni and Co concentrations are higher than average crustal values with implication for ultrabasic to basic magma composition for the komatiitic progenitor and also suggestive of possible mineralisation. Conclusion: Mineralogical examination has revealed a talc-chlorite-tremolite composition for the talcose rocks with peridotitic komatiite precursory while geochemical composition supported ultrabasic magmatism similar to those with the Ilesha schist belt.
Keywords: Ila Orangun-Oyan; Talcose rocks; Hydrothermal alteration; Peridotitic Komatiite; Ilesha schist belt

References

Obaje NG. Geology and Mineral Resources of Nigeria. Springer. 2009.
Mccurry P. The geology of the Precambrian to Lower Palaeozoic Rocks of Northern Nigeria. A Review. In: Kogbe CA., ed. Geology of Nigeria. (pp. 15-39) Elizabethan Pub. 1976.
Olade MA, Elueze AA. Petrochemistry of the Ilesha amphibolites and Precambrian crustal evolution in the Pan-African domain of SW Nigeria. Precambrian Research. 1979;8(3-4):303–318. Available from: https://dx.doi.org/10.1016/0301-9268(79)90033-0
Ige OA, Asubiojo OI. Trace element geochemistry and petrogenesis of some meta-ultramafites in Apomu and Ife-Ilesa areas of southwestern Nigeria. Chemical Geology. 1991;91(1):19–32. Available from: https://dx.doi.org/10.1016/0009-2541(91)90013-h
Okunlola OA, Ogedengbe O, Ojutalayo A. Compositional features and industrial appraisal of the Baba-Ode talc occurrence, southwestern Nigeria. Global Journal of Geological Sciences. 2002;1(1):63–72.
Okunlola OA, Anikulapo FA. Compositional characteristics and industrial qualities of talcose rock in Erin Omu area, southwestern Nigeria. Journal of Mining and Geology. 2007;42(2):105–112. Available from: https://dx.doi.org/10.4314/jmg.v42i2.18851
Ige OA. Mineralogical and industrial properties of some Wonu Apomu talcs, western Nigeria. Nigerian Journal of Science. 1985;19:121–130.
Adeleye AO, Azeez OT, Yusuff OI. Perception of Housing Quality by Residents and Non Residents of Ibara Housing Estate, Abeokuta, Ogun State, Nigeria. American Journal of Human Ecology. 2014;3:81–93. Available from: https://dx.doi.org/10.11634/216796221403586
Durotoye MA, Ige OA. An inventory of talc deposits in Nigeria and its industrial application potentials. Journal of Mining and Geology. 1991;27(2):27–31.
Bolarinwa AT. Compositional and industrial evaluation of talc bodies of Oke- Ila area. Ilesa Schist Belt, Southwestern Nigeria. Mineral Wealth. 2001;118:48–52.
Elueze AA, Akin-Ojo OA. Functional characteristic of talc bodies in southwestern Nigeria. Mineral Wealth. 1993;85:7–14.
Olajide-Kayode JO, Okunlola OA, Olatunji AS. Compositional Features and Industrial Assessment of Talcose Rocks of Itagunmodi-Igun Area, Southwestern Nigeria. Journal of Geoscience and Environment Protection. 2018;06(01):59–77. Available from: https://dx.doi.org/10.4236/gep.2018.61005
Afolabi OA, Oduneye OC, Olatunji AS, Ajibade AC. Understanding Precambrian Komatiite Petrochemistry from talc bodies within the Ilesha Schist belt, Southwestern Nigeria. Ife Journal of Science. 2020;21(3):107. Available from: https://dx.doi.org/10.4314/ijs.v21i3.10
Elueze AA. Geology of the Precambrian schist belt of Ilesha area, southwestern Nigeria. In: Oluyide PO., ed. Precambrian Geology of Nigeria. (pp. 77-82) Geological Survey of Nigeria. 1988.
GSN, "Geological Map of Nigeria. 1:2, 000,000.," Geological Survey of Nigeria (GSN), Kaduna. 1994.
Ajibade AC, Wright JB. The Togo-Benin-Nigeria Shield: evidence of crustal aggregation in the Pan-African belt. Tectonophysics. 1989;165(1-4):125–129. Available from: https://dx.doi.org/10.1016/0040-1951(89)90041-3
Rahaman MA. Recent advances in the study of the basement complex of Nigeria. In: Precambrian Geology of Nigeria. (pp. 11-43) Geological survey of Nigeria publication. 1988.
Elueze AA. Geochemistry and Petrotectonic setting of metasedimentary rocks of the schist belt of Ilesa area, southwestern Nigeria. Journal of Mining and Geology. 1981;18(1):194–197.
Brindley GW, Brown G. X-Ray Diffraction Procedures for Clay Minerals Identification. In: GWB, GB., eds. Crystal Structures of clay minerals and their X-Ray identification. (pp. 305-356) Mineralogical Society. 1980.
Moore DM, Reynolds RC. X-Ray Diffraction and the Identification and Analysis of Clay Minerals (2). Oxford. Oxford University Press. 1997.
Deer WA, Howie RA, Zussman J. An introduction to the Rock- Forming Minerals (2). Prentice Hall. 1992.
Arndt NT, Narldrett AJ, Pyke DR. Komatiitic and Iron-rich Tholeiitic Lavas of Munro Township, Northeast Ontario. Journal of Petrology. 1977;18(2):319–369. Available from: https://dx.doi.org/10.1093/petrology/18.2.319
Brooks C, Hart SR. On the Significance of Komatiite. Geology. 1974;2(2):107. Available from: https://dx.doi.org/10.1130/0091-7613(1974)2<107:otsok>2.0.co;2
Olorunfemi AO, Olanrewaju VO, Okunlola OA. Petrochemistry and genetic indicators of talcose rocks of Esie Area, Southwestern Nigeria. Materials and Geo-environment. 2010;57(3):363–386.
Sun SS, Nesbitt RW. Petrogenesis of Archaean ultrabasic and basic volcanics: Evidence from rare earth elements. Contributions to Mineralogy and Petrology. 1978;65(3):301–325. Available from: https://dx.doi.org/10.1007/bf00375516
Nesbitt RW, Sun SS, Purvis AC. Komatiites: geochemistry and Genesis. Canadian mineralogist. 1979;17:165–186.
Taylor SR. Abundance of Chemical Elements in the Continental Crust: a new table. Geochimica et Cosmochimica Acta. 1964;28:1273–1285.
Rollinson H. Using Geochemical Data: Evaluation, Presentation and Interpretation. (Vol. 352) Longman Group Ltd.. 1993.
Lightfoot PC. Sudbury Nickel in a Global Context. In Nickel Sulfide Ores and Impact Melts. In: ., ed. Origin of the Sudbury Igneous Complex. (p. 680) Elsevier. 2017.
Jochum KP, Verma SP. Extreme enrichment of Sb, Tl and other trace elements in altered MORB. Chemical Geology. 1996;130(3-4):289–299. Available from: https://dx.doi.org/10.1016/0009-2541(96)00014-9
Ako TA, Vishiti A, Suh CE, Kedia AC, Omang O. Trace and Rare Earth Elements Patterns in Metamorphosed Ultramafic Rocks of the Paleoproterozoic Nyong Series, Southeast. International Journal of Mining Science. 2018;4(4):10–24.
McDonough WF, Sun SS. The composition of the Earth. Chemical Geology. 1995;120(3-4):223–253. Available from: https://dx.doi.org/10.1016/0009-2541(94)00140-4
Bayiga EC, Bitom D, Ndjigui PD, Bilong P. Mineralogical and geochemical characterization of weathering products of amphibolites at SW Eséka (Northern border of the Nyong unit, SW Cameroon) Journal of Geology and Mining Research. 2011;3(10):281–293.
Mondal SK, Zhou MF. Enrichment of PGE through interaction of evolved boninitic magmas with early formed cumulates in a gabbro–breccia zone of the Mesoarchean Nuasahi massif (eastern India) Mineralium Deposita. 2010;45:69–91. Available from: https://dx.doi.org/10.1007/s00126-009-0264-0
Neal CR, Taylor LA. A negative Ce anomaly in a peridotite xenolith: Evidence for crustal recycling into the mantle or mantle metasomatism? Geochimica et Cosmochimica Acta. 1989;53(5):1035–1040. Available from: https://dx.doi.org/10.1016/0016-7037(89)90208-1
VB, Singh SP, Satyanarayanan M, Anjaiah KV. Platinum group elements geochemistry of ultramafic and associated rocks from Pindar in Madawara Igneous Complex, Bundelkhand massif, central India. Journal of Earth System Science. 2013;122(1):79–91. Available from: https://dx.doi.org/10.1007/s12040-012-0260-0
Olobaniyi SB, Annor AE. Petrology and age implication of ultramafic schist in the Isanlu area of the Egbe-Isanlu schist belt, southwestern, Nigeria. Journal of Mining and Geology. 2003;39(1):1–9. Available from: https://dx.doi.org/10.4314/jmg.v39i1.18785
Taylor SR, McLennan SM. The geochemical evolution of the continental crust. Reviews of Geophysics. 1995;33(2):241. Available from: https://dx.doi.org/10.1029/95rg00262
Naldrett AJ, Cabri LJ. Ultramafic and related mafic rocks; their classification and genesis with special reference to the concentration of nickel sulfides and platinum-group elements. Economic Geology. 1976;71(7):1131–1158. Available from: https://dx.doi.org/10.2113/gsecongeo.71.7.1131
Jensen LS. A New Cation Plot for Classifying Subalkaline Volcanic Rocks. Ontario Division of Mines, Miscellaneous paper. 1976.

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© 2020 Omotunde et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee).