 | | Journal (article/letter/editorial) | | Central Nigeria E.G. IMEOKPARIA Department of Geology,Universityof Ibadan, Ibadan, Nigeria Abstract...rocks productive in tin YoungerGranite Complex,Nigeria. It is alsothe first may contain higher than normal...mineral presentis biotite, it Fig. 2)--and minor quartz porphyryemplacedwithin 0961-0128/82/95/1710-2452...50 1710 Sn CONTENT OF BIOTITES, AFU COMPLEX, NIGERIA 1711 FIG. 1. Locationof the Afu YoungerGraniteComplex...generalizedgeologicmap of the ring complexes in Nigeria. Precambrian-Paleozoic basementgneissesand older |  | | Journal (article/letter/editorial) | | e r n Nigeria h a v e been studied t o g e t h e r with some alkali acid rocks outside Nigeria a n d...ratio for a number of Na-rhyolites from Northern Nigeria. Cd values vary between 0.21 and 0.48 ppm. These...Northern Nigeria Aegirine-riebee~:ite-rhyolite ½m SE of D. Gaiya, Liruei, Northern Nigeria Brown rhyolite...Liruei, N. Nigeria Porphyritic rhyolite, near No. 9051 Basal rhyolite, Banke, Northern Nigeria Ptwple-brown...n 215 a n d 410 p p m whereas in those outside Nigeria Zn is between 200 a n d 570 p p m . Cd, on the |  | | Journal (article/letter/editorial) | | evolution of the Younger Granites of Northern Nigeria J. R’. BUTLER, Pure Geochemistry P. BOWDES,...IKTRODUCTIOX THE Younger Granites of Northern Nigeria, recently mapped and described by consist principally...Northern followed by later riebeckite-granite. Nigeria activity and emplacement forms a more complicated...Sara-Fier Hotum, Kaleri Hotum, Kaleri Mbul, Kaleri Odegi, Afu Hilla lil) l&o Sherc to,,) (p.pm.) ~_...evolution of the Younger Granites of Sorthern Nigeria 91 Table 1 (Co&). i__ K20 Rb K/Rb (%) (p |  | | Journal (article/letter/editorial) | | and its alteration products from the Afu Hills, Nigeria M. T. STYLES AND B. R. YOUNG Institute of Geological...ABSTRACT. Eluvial pebbles from the Afu Hills, Nigeria, are largely composed of fluocerite, Ce0.5oLao...property of United Tin Areas of Nigeria, near Odegi, Afu Hills, Nigeria'. Attempts were made to determine...Tin Mines Ltd. (previously United Tin Areas of Nigeria), Mackay and Schnellm a n n Ltd. (the consultants...limonite vein is composed largely of goethite and quartz, an alumino-silicate, probably kaolinite and rare |  | | Journal (article/letter/editorial) | | (CENTRAL NIGERIA) EBO GAB. IMEOKPARIA Department of Geology, University of lbadan, Ibadan (Nigeria) (Received...from the Afu Younger Granite Complex (central Nigeria). Chem. Geol., 32: 247--254. Analysis of fluorine...It consists mainly of biotite granites and minor quartz--feldspar porphyries; ore deposits of tin, columbite...Location of the Afu Younger Granite Complex, central Nigeria. Sn deposits. This paper compares the F content...while the highest value is 7.21% for the albitized Odegi biotite granite -- a product of subsolidus recrystallization |  | Dalby, Kim N., Anderson, Alan J., Mariano, Anthony N., Gordon, Robert A., Mayanovic, Robert A., Wirth, Richard (2010) An investigation of cathodoluminescence in albite from the A-type Georgeville granite, Nova Scotia. Lithos, 114 (1) 86-94 doi:10.1016/j.lithos.2009.08.001 | Journal (article/letter/editorial) | | major mineral assemblage of the granite consists of quartz, albite, microcline perthite, and some biotite...et al., 2008). The associated pegmatites contain quartz, albite, microcline (amazonite), topaz, muscovite...to be observed. Only fluid inclusions hosted in quartz grains, that showed no evidence of necking or alteration...alteration, were considered for further analysis. Quartz grains with suitable FIA's were extracted from...mainly of quartz, microcline perthite and albite (Fig. 1). The 1 to 2 mm sized granular quartz grains are |  | | Journal (article/letter/editorial) | | by centres of ovcrsaturated magmatism such as Nigeria and Sudan. Thcre are also provinces with undersaturated...Geochemistry Mineralization Phanerozoic Cameron Niger Nigeria Sudan Saudi Arabia Namibia 1. Introduction Most...accompanied the uplift which followed it. I n Niger-Nigeria and also Sudan a more or less continuous sequence...Similarly the Mesozoic oversaturated magmatism of Nigeria has an almost identical age range to the mixed...similar age range to the oversaturated complexes of Nigeria. The Namibian Province (19CL120 ma) comprises of |  | | Book | | (Richardson et al. 1968) and at albite = jadeite + quartz (16.3 kb, 600°C) (Johannes et al. 1971). Thmperatures...nepheline-free (transitional basalts, olivine - and quartz - tholeiites) and nepheline-bearing in the classic...Ahaggar, Hoggar (AH); A, Mesozoic ring complexes, Nigeria (MRC) *, 140 West African Magmatism 1000 ...central Atlantic; MRC: Mesozoic ring complexes, Nigeria; MLBT: Mesozoic lavas from Benue trough; CCL: Cainozoic...Micropegmatite, comprising a micrographic intergrowth of quartz and alkali feldspar, is invariably interstitial |  | | Book | | Distribution in Tin-bearing Pegmatites of Southwestern Nigeria. . . . . . . G. Matheis, W.O. Emofurieta and S...Department of Geology, University of Ife, Ile-Ife, Nigeria B.J. FRYER Department of Geology, Memorial University...Nigerian Steel Development Authority, Kaduna, Nigeria OHIWEREJ List of Contributors IX B. VAN DE...fractures which have served to guide the processes of quartz-tourmaline and greisen alteration in the consolidated...trending elvan dyke which also cuts the tourmaline-quartz-greisen fracture sets (Fig. 4). Dangerfield et |  | | Journal (volume) | | Accessory Mineralogy of the Ririwai Biotite Granite, Nigeria, and its Albitized and Greisenized Facies: R. A...Magmatism, and Metamorphism in the Lower Benue Trough, Nigeria: J. Benkhelil ................... 467 A Model for...De Wit 1985; Lamb and Paris under review) I F5 quartz - orenite, si Its tone F4 conglomerate with o...matrix of both chert and single crystal quartz groins, chert - quartz orenite, conformable to unconformable...planar cross bedding ....oLA.. single crystal quartz groins predominant over chert groins tectonic break |  | | Report (issue) | | age of fergusonite from the Jos area, Northern Nigeria. Mineral. Mag., 33, 48-51 . DIMES, F. G. 1 962...Structures in the Bima Sandstone. Ree. Geol. Surv. Nigeria for 1 959, 5-14. JoNES, G. P. 1 962. Deformed ...Cross-stratification in Cretaceous Bima Sandstone, Nigeria, J. Sediment. Petrol., 32, 231-9. KNOX, J. 1 962...African localities. CRAWFORD, H . , EsQ.-Kyanite-quartz rock, tour1naline in chlorite-talc-schist and pyrrhotine... M. P., EsQ.-Magnetic zircon from Odegi, Be11ue Province, Nigeria. KAUFFMANN, H. A. EsQ.-Three specimens |  | | Book (edition) | | very old origin, often without lrnown source. e.g. quartz or cinnabar. Current practice most often names...polished mineral surface, expressed in clase. 7 - quartz. 8 - topaz, 9 - corundum, 10 - dia- percentage...purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite, sursassite, ardennite, Triclinic... translucent, luster growing on orthoclase and quartz on the Malosa resinous.streak white. H = 5. D =...where inclusions of aerinite cause blue color of quartz crystals, all Spain. With scolecite and prehnite |  | | Book | | Ontario ................. . 4.5.4 Post-Metamorphic Quartz-Rich Vein Ores: The Sigma Mine, Quebec ..........alkali granites such as those of the Jos Plateau, Nigeria (Jacobson Introduction: Plate Tectonics and Geology...porphyry copper deposits occupy a spectrum from quartz diorites to adamellites. In island arc settings...hornblende and hornblende-biotite diorites and quartz diorites predominate (Griffin 1983; Sillitoe and...ore-associated intrusions tend to be granodiorites and quartz monozonites (Burnham 1981). In the Galore Creek |  | | Book | | cassiterite to certain placer deposits, for example, in Nigeria. In this group the cassiterite is syngenetic with...the ‘younger’ (Jurassic) granites of Nigeria, for example, at Odegi. There, cassiterite, in part intergrown...porphyry characterised by the presence of bipyramidal quartz crystals and thorite. As these minerals do not...its lithium and tin content. It consists of quartz, microcline, albite and muscovite with minor...at Phuket (Thailand) and in Northern Nigeria. In Northern Nigeria, where the pegmatites are associated |  | | Report (issue) | | isotopic dating of fluid inclusions within ore-deposit quartz crystals, new ideas on the application of stable-isotope...3 km and is 1 0 - 20 m thick; it contains thin quartz units rich in sphalerite and galena. Further recent...plutonic complex, is a series of sharply discordant quartz veins and stringers, commonly richly mineralised...mineralisation apart from large masses of quartz and quartz-orthoclase pegmatite , unlikely to be of practical...licence applications . Overseas Division 4 1 Nigeria and Sudan Brunei Work was undertaken by the Hydrogeology |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Especially when the mineral species is common, such as quartz (75.1.3.1), many varieties (jasper, onyx) are known...chemistry and structure are identical to those of quartz. 5D. Polytypes Materials whose basic structural...only with fibrous minerals Columbite, wolframite Quartz Opal, some yellow varieties of sphalerite Nepheline...are distinctive. Chonchoidal fracture, typical of quartz, gives a fracture similar to the interior of a...Calcite 4 5 6 Fluorite Apatite Orthoclase a Quartz Soft, greasy feel like tale and graphite, and |  | | Journal (issue) | | Republic of the Congo Ghana Kenya Morocco M-zembique Nigeria N-rthern Rhodesia Southern Rhode-ia S-uth West...more effective. A similar situation exists with quartz except that the isoelectric point is at a pH of...from quartz sodium dedecylsulfate was to occur at a pH of 1.0 to 3.5. optimum flotation of quartz goethite...tively found appeared flotation completely of quartz, flotation large to a quantity 5.0 have ...required to pin the coarsest nonconductors such as quartz and zircon) was sufficient to pin much of the leucoxene |  | | Book | | Dana, defines it : " An opake impure variety of quartz, of red, yellow, and also of some- dull colours... they run purling over pebbles of .milke-white quartz, or grass green prase, or yellow jasper, ,or sky-blue...granite, wherever I have observed it, is composed of quartz, mica, and felspar, the latter usually white ;...principally greenitone, with -veins of granite and quartz. It has never been analyzed, but its mineral contents...silex. It probably consists of hornblende, and quartz. Mr. Crawford enumerates all the other - rocks |
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