Pyrophanite: a typical mineral in the Pan-African Province of Western and Central Nigeria

Ajayi, 1980, On the geochemistry and origin of the amphibolites in the Ife-Ilesha area, southwestern Nigeria, J. Min. Geol., 17, 179 Bafor, 1981, The occurrence of sulphide mineralization in the Egbe area of southwestern Nigeria, J. Min. Geol., 18, 175 Black, 1980, Precambrian of West Africa, Episodes, 4, 3, 10.18814/epiiugs/1980/v3i4/001 Bungwon, 1983 Elueze, 1981, Petrographic studies of metabasic rocks and metaultramafites in relation to mineralization in Nigeria schist belts, J. Min. Geol., 18, 31 Jacobsen, 1946, The pegmatites of Central Nigeria, Bull. Geol. Surv. Nigeria, 17, 61 Haggerty, 1976, Opaque mineral oxides in terrestrial igneous rocks, Oxide Minerals Min. Soc. Am., 3, 101 Klemm, 1984, The Precambrian metavolcano-sedimentary sequence east of Ife and Ilesha, Southwest Nigeria. A Nigerian ‘greenstone belt’?, J. Afr. Earth Sci., 2, 161 Matheis, 1983, RbSr isotophic study of rare metal bearing and barren pegmatites in the Pan-African reaction zone of Nigeria, J. Afr. Earth Sci., 1, 35 McCurry, 1976, The geology of the Precambrian to Lower Palaeozonic Rocks of Northern Nigeria, 15 Mücke, 1985, Are the iron ore deposits of Itakpe area of the Itabirite type? Mücke, 1984, Geological and ore microscopic evidence on the epigenetic origin of the manganese occurrences in northern Nigeria, J. Afr. Earth Sci., 2, 209 Ndefru, 1983, The geology of the Northern part of the Ugoge (near Giwa) manganese occurrence Olade, 1978, General features of a Precambrian ore deposit and its environment at Itakpe ridge, Okene, Nigeria, Inst. Min. Metall. Trans., 87B, 1 Olade, 1979, Petrochemistry of the Ilesha amphibolites and Precambrian crustal evolution in the Pan-African domain of southwest Nigeria, Precambr. Res., 8, 419, 10.1016/0301-9268(79)90033-0 Rahaman, 1976, Review of the basement geology of southwestern Nigeria Tompkins, 1985, Groundmass oxide minerals in the Koidu kimberlite dikes, Sierra Leone, West Africa, Contr. Miner. Petrol., 245, 10.1007/BF00413351 Turner, 1983, Upper Proterozoic schist belts in the Nigerian sector of the Pan-African province of West Africa, Precambr. Res., 21, 57, 10.1016/0301-9268(83)90005-0 Shibayan, 1985 Wright, 1977, Serpentinite in the basement of northwestern Nigeria, Nig. J. Min. Geol., 14, 34