iron ore formation in northern nigeria basement rocks,iron ore formation in northern nigeria basement rocks products. as a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, iron ore formation in northern nigeria basement rocks, quarry, aggregate, and different kinds of minerals..the crystalline metamorphic rocks of southwestern,the crystalline metamorphic rocks of south-western togoland - volume 61 issue 3 geography and geology of northern nigeria, pp. 117 et seq.google scholar. page 119 note 6 page 119 note 6 wilson, r. c., etc., the geology of the western railway, section i geol. surv. of nigeria, bulletin no. 2.google scholar. page 120 note 1 page 120.
twenty-four mineral and whole-rock k-ar ages have been determined from twenty-two samples collected during recent mapping in northern nigeria. with three exceptions, the samples are from narrow synclinorial belts of relatively low-grade metasedimentary rocks within the crystalline basement complex.
dec 01, 2008 abstract different rock types from the area northeast of obudu, southeastern nigeria were investigated in order to place constraints on their metamorphic conditions. detailed petrographic studies indicate four main rock groups in the studied area, namely migmatitic gneiss, migmatitic schist, granite gneiss and a minor amount of amphibolite, metagabbro and dolerite. the chemistry of
mla style citation g.n. sambo, m. adegbe, , e.a. onimisi petrochemistry of granitic rocks in gwada, north central nigeria.international journal of scientific
dec 01, 1997 abstract kar ages have been obtained for mineral separates plagioclases from two dolerites and biotites from one granite and four granodiorites in the obanobudu massif of southeastern nigeria. dolerites in the oban area give kar plagioclase ages of 204.0 9.9 ma and 219.9 4.7 ma. the granite of the obudu area yields a kar biotite age of 507.6 10.1 ma whilst the
mar 16, 2020 kufena hills is located in zaria, kaduna state, northern nigeria. kufena hills is made up of metamorphic rocks which form the base material at the core of the earths major continental masses. the landscapes diverse ecosystem, flora and fauna and various landforms make the hills and its environs outstanding.
aug 04, 2021 metamorphic rocks of the bossangoa-bossembl area in the northern central african republic (car) consist of both meta-sedimentary and meta-igneous units. a petrographic investigation reveals that the meta-sedimentary unit is composed of pelitic granulites while meta-igneous unit comprises mafic granulites. the mineral assemblages are indicative of granulite facies conditions (i.e.,
the metamorphic rocks of northern nigeria consist. mainly of monotonous granitehigh-grade gneisses. and migmatites cut by large pan-african monzogranite. plutons (fig. 1).
according to 16, the northern nigerian basement complex is underlain by three main groups of rocks namely 1. migmatites and (high grade) gneisses derived from birrimain sedimentary rocks through high grade metamorphism and granitization 2. younger metasediments of upper proterozoic age which are low grade metamorphic rocks that were folded
highpressure (hp) granulite facies rocks are associated with eclogites in the panafrican dahomeyide orogen, west africa. the hpgranulite and eclogite facies mineral assemblages occur in mafic gneisses within the suture zone exposed in southeastern ghana and the adjoining part of togo. thermobarometric calculations and phase equilibria considerations indicate that the hp metamorphic
over 50 of northern nigeria is covered by both the rocks of the basement complex rock types and the sedi- mentary rocks (figure 1). the older granites, migmatite and gneissic rocks comprise the extensive mass of metamorphic rocks un- derlying most areas of the north and west of the country. the rocks include different textures of granites
intrusions) of these basement rocks have been discussed extensively by rahaman (1996) and other studies. 2.2. the sedimentary basins . figure 1. geological map of nigeria (obaje, 2009) the sedimentary basin consists of sedimentary rocks which were derived from preexisting rocks (igneous or - metamorphic rocks, or even sedimentary rocks) deposited
southern end of the high plains of northern nigeria, bounded by parallels 9003n and 11 032n, and extends from the upper river mariga on 6005e to 848e on the foot slopes of the scarp of jos plateau 18. the bedrock geology is predominantly metamorphic rocks of the nigerian basement complex consisting of biotite gneisses and older granites
the basement complex of nigeria is made up of crystalline (igneous and metamorphic) rocks which are sometimes referred to as hard rocks. the nigeria basement is part of pan-african mobile belt and it is located between congo and west african cratons. the geology of the precambrian to lower paleozoic rocks of northern nigeria, a review, in
groundwater in nigeria is restricted by the fact that more than half of the country is underlain by crystalline basement rock of pre-cambian era. the main rock types in this geological terrain include igneous and metamorphic rock such as migmatites and
egbe, ajaokuta (in northern nigeria) ibadan, ile-ife, akure, ikerre, (in western nigeria) and obudu and the oban massif areas in eastern nigeria. fig. 1.5 baement complex outcrops 30 km north of bauchi on the bauchi kari road. basement complex rocks are generally low lying and concordant in contrast to the cross-cutting, discordant,
metamorphic terrain that constitutes part of the pan-african trans-saharan belt exposures in southeastern nigeria. it is essentially characterised by the occurrence of regionally metamorphosed rock successions, pervasive migmatization, and granite plutonism (ferre et al. 1996). the plateau, which
1998). similar granitic rocks have also been studied in various parts of the nigerian basement complex- northern nigeria (olarewaju rahaman, 1982), jebba area (okonkwo winchester, 2004), obudu plateau, southeastern nigeria (ukwang ekwueme, 2009),
mar 01, 2013 assessment of groundwater quality from the rocks of the basement complex in the southern parts of kaduna state, nigeria was carried out. forty samples from boreholes, hand-dug wells and springs were collected during the dry and raining seasons for chemical and bacteriological analyses. the essence of the study is to assess the quality and the portability of the groundwater using the
phases of deformation (d1, d2, d3) within th e crystalline rocks of the basement complex in northern nigeria. according to this author m1 represents a period of progressive metamorphism to lower amphibolite facies. m2 is described as retrogressive and reached only green schist grade as did m3. in the southwest boesse and ocan (1988) recognized 3
apr 09, 2019 limestone is a sedimentary rock and non-renewable natural resources that is greatly used by local, as well as international firms in nigeria. locations abia, anambra, akwa ibom, bayelsa, borno, bauchi, benue, enugu, edo, ogun, imo, ondo, and sokoto states. 17. phosphate. phosphate mineral deposits are found in metamorphic and igneous rocks.
oct 01, 2020 the basement rocks of the igarra schist belt represent a high grade metamorphic terrain with polyphase deformation. the deformation has caused folding, refolding, foliation, lineaments and shearing of the metamorphic rocks with mainly n-s to ne-sw trends in conformity with other parts of the reactivated basement complex of nigeria (rahaman
akwanga nw, plateau state, nigeria is underlain by pelitic to semipelitic schists which locally grade up to the sillimanite zone of regional metamorphism. other rock types include migmatitic gneisses, small metaquartzitic bodies, augen-gneiss, granite-gneiss, granites, pegmatites and delerites. the dominant trends of linear and planar structures are largely n-s. these cross-cut earlier
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