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| Northern Nigeria Mosv. s A. O•.^r)v. Abstract The JurassicYounger Granites of northern Nigeria are closelyassociatedwith...the fact that the hilly and rockytopographyof the Jos plateauhas resultedin a poor development of residualsoils...T^BLE 1. Average Chemical Composition of the Main Younger Granite Rock Types (after MacLeod et al., 1971)...of tin-bearing and barren granitesin northern Nigeria, and is in part basedon detailedprior knowledgeand...Jurassic Younger Granites of northern Nigeria form a consanguinous seriesof high level, anorogenic ring complexes |
 | Williams, F. A., Meehan, J. A., Paulo, K. L., John, T. U., Rushtan, H. G. (1956) Economic geology of the decomposed columbite-bearing granites, Jos plateau, Nigeria. Economic Geology, 51 (4) 303-332 doi:10.2113/gsecongeo.51.4.303 | Journal (article/letter/editorial) |
| WILLIAMS, DECOMPOSED JOS PLATEAU, J. A. MEEHAN, AND H. No. 4 COLUMBITE- NIGERIA K. L. PAULO, T. U........................................... Jos-Bukuru Complex,general geology ....................................... Jos-BukuruComplex--mineralogy ....................................... Jos Granite ................................................ 321 Bukuru Granite ....................................................................... The Ropp-Tenti Complex ........................................... Kwop |
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| POTENTIAL OF GRANITIC ROCKS FROM THE JOS-BUKURU COMPLEX, NORTHERN NIGERIA EBO GAB. IMEOKPARIA Department...Department of Geology, University of Ibadan, Ibadan (Nigeria) (Received May 7, 1979; accepted for publication August...potential of granitic rocks from the Jos--Bukuru Complex, northern Nigeria. Chem. Geol., 28: 69--77. Geochemical...analyses of fresh bedrock samples indicate that the Jos--Bukuru biotite granites are characterized by enhanced...ratios. These results, as applied to the Jos--Bukuru Complex, indicate that Sabon Gida and Rayfield have |
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| GeologicalSurvey oJ lt[igeria, Kaduna Sowth, I{ orthern Nigeria. INrnonucrroN In 1954,xenotime was identified by...the GeologicalSurvey by Amalgamated Tin Mines of Nigeria Ltd. The concentratewas obtained from the mineral...establishedat Rayfield (9"50'N; 8"55'E) near Jos, Northern Nigeria to work the intensely decomposedbiotitcgranite...primary columbite. The geologyof the Jos-Bukuru Younger Granite Complex, which includesthe Rayfield-Gonabiotite-granite...identification of the xenotime, Amalgamated Tin Mines of Nigeria produced high grade concentrates of the mineral |
 | Banerjee, D.C., Maithani, P.B., Ranganath, N., Jayaram, K.M.V. (1983) Rare-metal mineralisation in granitic rocks of the Kanigiri area in the Prakasam District, Andhra Pradesh, India. Chemical Geology, 39 (3) 319-334 doi:10.1016/0009-2541(83)90022-0 | Journal (article/letter/editorial) |
| r o n ; S o r e n s e n , 1 9 7 4 ) in Jos Plateau o f Nigeria. F l u o r i t e , t o p a z , zircon and...close resemblance with those of the Jos--Bukuru Complex, Nigeria. Taking this as a type area for the...chemical similarity o f these granites with t he Jos--Bukuru oc- 324 Na20 + K20 • Vinukondo • Venkatac...Zircon, ilmenite, monazite, rutile, sphene and thorite occur as accessories. Cassiterite is also present... Average major,elemental composition of the Jos--Bukuru granite (Imeokparia, 1980), is also given for |
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| northern Nigeria T.A. BADEJOKO Department of Geology, University of lbadan, Ibadan (Nigeria) LITHOS...granites, northern Nigeria. Lithos, 17: 259-271. The biotite granites in the Nigerian Younger Granites are...February 14, 1984) Introduction The Younger Granites o f Nigeria are characterized by e n r i c h m e...volcanic-subvolcanic granite c o m p l e x e s o f Nigeria c o m m o n l y have late granitic intrusive phases...al., 1971). Geological setting The Younger Granites of Nigeria form the southern extension of a series |
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| on April 26, 2015 RING COMPLEXES IN THE YOUNGER GRANITE PROVINCE OF NORTHERN NIGERIA CONTENTS I. INTSODUCTmN...II. GENERALFEATURES OlVTHE YOUNGER GRANITES (a) Distribution of the Younger Granites (b) Structural features...features (i) Volcanic structures (ii) Cone-sheets and ring-dykes (iii) The granite intrusions . (c) The (i)...Summary of the chemical characteristics of the Younger Granite province . 11 11 13 16 19 23 35 42 ... (d) Rop . . (e) Sha-Kaleri. 9 (f) Jos-Bukuru (g) Banke (h) K u d a r u (i) Ningi . . . . (j) Tongolo |
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| columbite-bearing membersof the Younger Granite suite in Northern Nigeria, and the occurrenceis of particular...beryllium mineral associated with the Nigerian Younger Granites, although beryl is not rare in the BasementComplex...granitic suite that make up the Jos-Bukuru complexin Northern Nigeria. Studies of this and other complexeshave...Publication authorized by the Directors of A. O. Nigeria, Ltd. f Research Institute of African Geology,...University of Leeds. f Formerly of A O. Nigeria Ltd., P.O. Jos, N. Nigeria. $ E. M. Eskova has recently described |
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| of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria E. G. Imeokparia...of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria. Geological Magazine...of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria E. G. IMEOKPARIA...City, Nigeria (Received 14 December 1983; accepted 22 June 1984) Abstract - The Jarawa Younger Granite...Granite complex is composed of high silica alkali granites that were emplaced 161 Ma ago. The granites are |
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| VOL. 18, JANUARY_FEBRUARY, 1963 XENOTIME AND THORITE FROM NIGERIA1 E. Wn. HrrNntcn, The [Jnivers'ityof...paper by Jefford (1962) describing xenotime from Nigeria brought to mind that in 1958 among numerous rare-earth...in this laboratory were Nigerian xenotime and thorite for which partial analyseswere made by means ol...Xenotime concentrate, Nigeria. By r ny fluorescence. 2. Xenotime, Rayfield, N. Nigeria, Jetrord (1962)' By...The results of the two analyses of xenotime from Nigeria are comparedin Table 1. The higher ZrOzcontent |
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| auhvolanic t o plutonic nature often in the form of ring complexes. These can be subdivided into two separate...by centres of ovcrsaturated magmatism such as Nigeria and Sudan. Thcre are also provinces with undersaturated...the abundance of zircon, uranium. thorium and complex Ti-Zr silicates, the importance o f columbite,...Geochemistry Mineralization Phanerozoic Cameron Niger Nigeria Sudan Saudi Arabia Namibia 1. Introduction Most...subvolcanic to plutonic nature often in the form of ring complexes. These can be subdivided into two separate |
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| niobium-rich arfvedsonite granites, Younger Granites province of Nigeria P.O. Ogunleyea,, E.C. Ikeb, I.... 1014, Zaria, Nigeria b Department of Geology, Ahmadu Bello University, Zaria, Nigeria Received 7 May...the northern sector of the Nigerian anorogenic ring-complex province wherein they form the main granitic...components of Kila-Warji, Ririwai and Dutsen-Wai ring-complexes. The albitized variety of these rocks...Anorogenic ring-complexes; Arfvedsonite granites; Albitization; Pyrochlore mineralization; Nigeria; REE patterns |
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| granitic rocks of the Tongolo Anorogenic Complex- Northern Nigeria E. G. Imeokparia Department of Geology... P.M.B. 1154, Benin City, Nigeria Abstract. The Tongolo Anorogenic Complex consists of peraluminous biotite...Introduction The 270 km 2 Tongolo Anorogenic Complex in northern Nigeria consists mainly of granitoids and minor... The metalliferous occurrences in the Tongolo Complex include Sn, W, Nb and Zn deposits associated with...with the biotite granite units. The Tongolo Complex is perhaps one of the few complexes in the Nigerian |
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| George Obaje Geology and Mineral Resources of Nigeria 123 Prof. Nuhu George Obaje Nasarawa State University...University Dept. Geology & Mining Keffi Nigeria nobaje@yahoo.com ISSN 0930-0317 ISBN 978-3-540-92684-9...Resources of Nigeria are very few and mostly not accessible in Libraries and Bookshops in Nigeria. This book...activities in the Geology and Mineral Resources of Nigeria. The author has brought together several published...students of geology in tertiary institutions in Nigeria and abroad. Additional insights were also provided |
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| FLUORINE IN BIOTITES FROM THE AFU YOUNGER GRANITE COMPLEX (CENTRAL NIGERIA) EBO GAB. IMEOKPARIA Department...Department of Geology, University of lbadan, Ibadan (Nigeria) (Received January 6, 1981; accepted for publication...Fluorine in biotites from the Afu Younger Granite Complex (central Nigeria). Chem. Geol., 32: 247--254. Analysis...Sn-bearing and Sn-barren rocks of the Afu Younger Granite Complex by microprobe indicates that the F abundance...INTRODUCTION The Afu Younger Granite Complex is the southernmost of the Nigerian ring structures exposed |
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| GRANITES OF THE LIRUEI (RIRIWAI) COMPLEX, YOUNGER GRANITE PROVINCE, NIGERIA S.J. EKWERE and M.A. OLADE*...Department of Geology, University of Calabar, Calabar (Nigeria) (Received May 19, 1983; revised and accepted...granites of the Liruei (Ririwai) Complex, Younger Granite Province, Nigeria. Chem. Geol., 45: 225--243. Geochemical...riebeckite--aegirine granites from the Ririwai Complex indicate that these rocks contain enhanced concentrations...Granite g e o c h e m i c a l p r o v i n c e o f Nigeria. M o s t o f t h e r o c k s c o n t a i n e n |
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| (Laramide or Tertiary?) transect the metamorphic complex. Depos'its Most of the smaller deposits generally...in several other veins. Minute morphologically complex hematite crystals also were found in insoluble...other speciescan readily be determinedas older or younger than it. The sequencewithin the sulfide stage is:...qtartz veinlets cut clear calcite veinlets, but in complex veinlets calcite usually occupiesinterior parts...Thus for this stage the sequenceappearsto be: 1) complex veinlets, 2) calcite veinlets,3) quartz veinlets |
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| geochemistry of the Copperhead Albitite ‘Carbonatite’ Complex, east Kimberley, Western Australia a C. S. Rugless...geochemistry of the Copperhead Albitite ‘Carbonatite’ Complex, east Kimberley, Western Australia, Australian...geochemistry of the Copperhead Albitite 'Carbonatite' Complex, east Kimberley, Western Australia C. S. RUGLESS1...Copperhead Albitite 'Carbonatite' Complex is a zoned alkaline intrusive. The complex and adjacent quartzofeldspathic...sodic metasomatism (albitisation). The Copperhead Complex comprises a quartz albite core or inner zone, enveloped |
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| GEOLOGICAL ABSTRACTS Part 8. Part 9. Swaziland Nigeria . • • • • • • • • • 343 , ' • • •...APPLICATION PROBLEMS . OF Gold Coast . Sierra Leone . Nigeria . . Uganda . . Kenya . . Tanganyika . Northern...making of cement, and in a number of them, as in Nigeria, Gold Coast, Kenya, Tanganyika, and Nyasaland,...investigation of ground-water supplies, and even, as in Nigeria, N yasaland, and Uganda, with their development...and grouted. Nigeria For about 16 years prior to 1947 the Geological Survey of Nigeria carried out an |
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| Geochemistry of the Tioueine Pan-African Granite Complex (Hoggar, Algeria) : A. Azzouni-Sekkal and J . Boissonnas...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...that the second event may be correlated with a younger orogeny possibly linking it to the Eburnean. ©...The oldest surrounding granitoids are coeval or younger than the supracrustals and both intrusive and |
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| potential of the element the more stable is the complex formed. Niobium and tantalum have ionic potentials...minerals of titanium or titanium and iron. These complex-forming elements can be considered as individual...Mamsk-Chuesk, Bodaibensk, U.S.S.R Mamsk-Oronskii complex, U.S.S.R __ _ Konkudero-Mamakanskii, U.S.S.R __...___ ___ Alkalic granite, Liruei, Nigeria _________ ___ Amo, Nigeria ___ ______ ___ _____ Mount Tremont...Alaskite, Ognitskii complex, U.S.S.R. (3)_ _ ___ _ _____ Riebeckite granite, Ognitskii complex, U.S.S.R. (3) |
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| colour index. This is, without doubt, the most complex lithologie association to be handled from the point...ores are almost always "epigenetic", that is, younger than the adjacent rock and generally emplaced when...abundant, provide reservoirs to fluids generated by younger (often the youngest) phases that are usually volumetrically...or in the mine workings at all. The Climax Mo complex is the best known example. Here three generations...emplaced by large-scale magmatic stoping and as ring dikes or cone sheets. Additional characteristics |
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| Gastropoda) from Nigeria. By R. A. Reyment, B.Sc., GeologicalSurveyDepartment,Nigeria Geology of an Elliptic...M. P. Jones, B.Sc., GeologicalSurveyDepartment,Nigeria . . . . . LABORATORY INVESTIGATIONS OF THE MINERAL...UpperCretaceousMollusca (Lamellibranchiaand Gastropoda)from Nigeria Sketch Map showing localities mentioned in the...GASTROPODA) 1 .FROM NIGERIA By R. A. REYMENT, B.Sc. GeologicalSurveyDepartment,Nigeria (With a Sketch Map...MAESTRICHTIAN MOLLUSCS FROM VARIOUS LOCALlTIES IN Nigeria are described. Five new lamellibranch species and |
 | | Book |
| colour index. This is, without doubt, the most complex lithologic association to be handled from the point...ores are almost always "epigenetic", that is, younger than the adjacent rock and generally emplaced when...abundant, provide reservoirs to fluids generated by younger (often the youngest) phases that are usually volumetrically...or in the mine workings at all. The Climax Mo complex is the best known example. Here three generations...emplaced by large-scale magmatic stoping and as ring dikes or cone sheets. Additional characteristics |
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| AIr ring complexes and the chapter devoted to the Cameroon line. A detailed review of African ring complexes...discrimination between tholeiitic, transitional and alkaline ring complexes. Based on the available data (including...so-called alkaline intrusions which occur in African ring complexes are associated with tholeiitic or transitional...geochemical criteria discriminating the anorogenic ring complexes (including A - granites s.s.) from the...review our present knowledge of the main African ring complexes and emphasize the need for a new classification |
