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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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| ALBITE-RIEBECKITEGRANITE, LIRUEI GRANITE RING-COMPLEX, NORTHERN NIGERIA I.P. ORAJAKA Department of Geological...Anambra State University of Technology, Enugu (Nigeria) (Received November 20, 1985; accepted for publication...albite--riebeckite-granite, Liruei Granite ring-complex, northern Nigeria. Chem. Geol., 56 : 85--92. The Kaffo...largely of albite and K-feldspar and subordinate aegirine. The Kaffo Valley albite--riebeckite-granite is...1. Introduction The Chad Basin of northeastern Nigeria has recently been the focus of intense exploration |
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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...arfvedsonite granite, increasing to 168 ppm in the aegirine arfvedsonite granite and reaching 1568 ppm in |
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| 358 Amphiboles from the Younger Granites of Nigeria. Part I. Chemical classification. By Mrs. G. D....7. [Read 7 June 1962.] Summary. The Younger Granites of Nigeria contain varied assemblages of iron-rich...been carried out on the granitic ring-complexes of Northern Nigeria, no systematic study has been made...dealt with more fully in a future paper). The Younger Granites occur throughout an area of 25 000 square...square miles in the Northern Region of Nigeria. About forty of these complexes have been found and a large |
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| Printedin Northern Ireland Zirconium in Younger &mites of Northern Nigeria P. B~WDEN Mineral Resources Division...1906) Am--The zirconium oontent of 48 Nigerian Younger Granites hes been determined by X-ray fluorescence...and rubidium data the evolution of the Nigerian Younger Granites appears to have been controlled by two...considers the distribution of zirconium in 48 Nigerian Younger Granites and offers further proof of the concept...shown that as the content of alkali feldspar, aegirine and alkali amphibole in the mineral sssembiages |
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| K/Rb ratios in the evolution of the Younger Granites of Northern Nigeria J. R’. BUTLER, Pure Geochemistry...Liruei complex the ratio decreases progressively with time of rmplacement but in the A%mo complex the r&i0...irregularly. IKTRODUCTIOX THE Younger Granites of Northern Nigeria, recently mapped and described by...hornblende-granite emplaced to give individual or overlapping ring complexes, In the north the cycle of magmatic activity...in the form of a ring dyke; biotit’e-granite is subsequently intruded inside the ring dyke and may be |
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| WITH MOLYBDENITE MINERALIZATION (KIGOM COMPLEX, NORTHERN NIGERIA) EBO GAB IMEOKPARIA Department of Geology...Geology, University of Benin, Benin City (Nigeria) (Received August 8, 1983; revised and accepted April...mineralization (Kigom Complex, northern Nigeria). Chem. Geol., 47: 261--283. The Kigom igneous complex of northern...northern Nigeria is a small intrusive complex made up of peralkaline arfvedsonite granite, riebeckite-biotite...riebeckite-biotite granite and riebeckite-aegirine granite. The granites show coherent major-element chemistry typical |
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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 |
 | Amuda, Abdulgafar Kayode, Yang, Xiaoyong, Deng, Jianghong, Faisal, Mohamed, Cao, Jinya, Bute, Saleh Ibrahim, Girei, Musa Bala, Elatikpo, Safiyanu Muhammad (2021) Petrogenesis of the peralkaline Dutsen Wai and Ropp complexes in the Nigerian younger granites: implications for crucial metal enrichments. International Geology Review, 63 (16) 2057-2081 doi:10.1080/00206814.2020.1821250 | Journal (article/letter/editorial) |
| Dutsen Wai and Ropp complexes in the Nigerian younger granites: implications for crucial metal enrichments...Dutsen Wai and Ropp complexes in the Nigerian younger granites: implications for crucial metal enrichments...Dutsen Wai and Ropp complexes in the Nigerian younger granites: implications for crucial metal enrichments...Sciences, Bayero University Kano, Kano State, Nigeria; dDepartment of Geology, Faculty of Science, Suez...eDepartment of Geology, Ahmadu Bello University, Zaria, Nigeria ABSTRACT ARTICLE HISTORY The Dutsen Wai and Ropp |
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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...albite--riebeckite and riebeckite--aegirine granites from the Ririwai Complex indicate that these rocks contain...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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| Ahmadu Bello University, Zaria, Kaduna State, Nigeria a r t i c l e i n f o Article history: Received...Syenite Post-collisional magmatism Mineralization Nigeria a b s t r a c t The emplacement of anorogenic...collision. Where the hiatus is much longer, as in Nigeria, we appeal to a propagating zipper-like zone of...and cassiterite associated with the Younger Granites of Nigeria. © 2012 Elsevier B.V. All rights reserved...hiatus. It is not at all uncommon to find, in the younger cycle of magmatism, geochemically more evolved |
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| Scotland The anorogenic granitoids of Nigeria are classic exampl& of ring complexes associated with migrating...hypersthene and fayalite granites to peralkaline aegirine. riebeckite-arfvedsonite granites rich in perthitic...the south. The majority of the Nigerian anorogenic ring-complexes represent the roots of volcanoes with...suitc of Mesozoic volcanic and plutonic rocks from Nigeria. Analyses of the crystalline basement rocks arc...elements Subsolidus mobilities Anorogenic granites Nigeria Fluids Geochemical characteristics 1. Introduction |
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| Gallium in Younger Granites of Northern Nigeria Geological Survey of Tanganyika, P.O. Ros 903, Dodoma...Abstract-The concentration of gallium in 38 Nigerian Younger &‘anitos is shown to increase from 18 ppm in the...previously report,ctI rrtbidium da.ta. Younger Granites of No~hern Nigeria? described by JACOBSON ef al. (195S)...emplaced to Chemically the Younger Granites give individual or overlapping ring complexes. are a closely...to determine the dif%rentiation t,rends of the Younger Granites. THE consist, ANALYTICAL TECHNIQUES |
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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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| syenite-granite complex in southern Malawi is famous for exceptional crystals of aegirine associated with...northern Nigeria, genthelvite has been recorded from the Jos-Bukuru Younger granite complex in Plateau State...genthelvite crystals to 1.6 cm on quartz with minor aegirine and an ocherous material, specimen 5.3 cm wide...with interpenetrating smaller genthelvites and aegirine, Mount Malosa, Malawi. Under daylight (left) and...minerals include albite, microcline, analcime, aegirine, serandite, and rhodochrosite. Helvine also occurs |
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| Printed in NorthernIreland Lithium in Younger Granites of Northern Nigeria P. BOWDEN Mineral R,esources Division...= t0.457). The rare alkali data for the Liruei complex indicates t’hat both lithium and thallium increase...riebeckit~o-granites (BOWDEPJ, 1964). INTRODUCTION NIGERIAX Younger Granites, described by JACOBSOX et al. (1958),...and caesium (BUTLER and THOMPSON, 1963) in the Younger Granites has been investigated, and in order to...level. available. DISTRIBUTION OF LITHIUM IN THE YOUNGER GRANITES Lithium (Lil+, 0.76 A*) tends to concentrate |
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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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| London, Special Publications Niger-Nigerian alkaline ring complexes: a classic example of African Phanerozoic...Library on June 9, 2014 Niger-Nigerian alkaline ring complexes: a classic example of African Phanerozoic...development of chains of volcanoes now exposed as ring complexes with Palaeozoic and Mesozoic ages. The...between alkali metasomatism in alkaline granite ring complexes and fenitization associated with carbonatites...relevance to the anorogenic alkaline ring complex province in Niger and Nigeria. For example, the Pan-African |
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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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| • • • • • • I ARTICLES The Chambe Plateau Ring Complex of Nyasaland. By K. V. Stringer, B.Sc.,...• 63 • • • 64 Swaziland • • • • • Nigeria • • • • • • • • • • 65 Gold Coast ... • 92 The Cretaceous Ammonoidea of Southern Nigeria and the Southern Cameroons. By R. A. Reyment, M...The Chambe Plateau Ring Complex of Nyasaland Photographic Mosaic of Chambe PlateatL Ring St1ucture ....Rampart of Ring ...dyke B . . ,, Interior Face of Ring-dyke B . . . ,, Location Map of Chambe Plateau Area |
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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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| phases of biotite granite in the Badzhal–Dussealin Complex have been described. The most abundant at the surface...main phase. Li–F granite of the Pravourmiysky Complex has also been identified. Under its influence,...euxenite) oxygen atoms. characterized by a similar complex of trace elements: W, REE, Mn, Fe, Pb, U, and Sc...metasomatic rocks and granite of the Pravourmiysky Complex. This conclusion corroborates the notions on tin-ore-bearing... stages. The diverse species compositions and complex anatomy of niobates are related to their multistage |
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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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| Swaziland . • • • • • • • • • 78 Nigeria . • • • • • • • • • 80 Gold Coast ...significance . . . FRANCIS DE Gu1NOAND • THE MORE COMPLEX AND ADVANCED AN INDUSTRIAL SOCIETY BECOMES, THE...£I½ million. Other increases were recorded in Nigeria, where the rise in columbite production together...Stating Results . . . . . • I. Minerals or Rocks younger than 485 m. y. . • • II. Minerals of the 485 m...although it is true that they can only provide a younger limit for the age of the orogeny concerned and |
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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 |
