 | | Journal (article/letter/editorial) | | Fluorine-Bearing Minerals (Fluorite, Topaz, and Cryolite) V. S. Antipin, E. A. Savina, and M. A. Mitichkin...fluorine-bearing minerals (fluorite, topaz, and cryolite) was carried out. It was shown that these rocks...geochemical types. The fluorite-, topaz-, and cryolite-bearing granites of these geochemical types are...fluorine-bearing minerals (fluorite, topaz, and cryolite) and F–Li micas. The fluorine content of these...type. The possibility of fluorite, topaz, and cryolite crystallization from natural magmas may suggest |  | | Report (chapter) | | COMPLEXES IN THE YOUNGER GRANITE PROVINCE OF NORTHERN NIGERIA CONTENTS I. INTSODUCTmN . . . . Page 5 ....19 23 35 42 (d) Rop . . (e) Sha-Kaleri. 9 (f) Jos-Bukuru (g) Banke (h) K u d a r u (i) Ningi . . ....thesis, unpublished). During the resurvey of the Plateau tinfields between 1945 and 1948, R. A. Mackay,...into the PreCambrian Basement Complex in Northern Nigeria. They are high-level, magmatic granites with sharply...There are about forty Younger Granite complexes in Nigeria. Until a complete survey of the province has been |  | | 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 |  | | Journal (article/letter/editorial) | | arfvedsonite granites, Younger Granites province of Nigeria P.O. Ogunleyea,, E.C. Ikeb, I. Garbab a Centre... 1014, Zaria, Nigeria b Department of Geology, Ahmadu Bello University, Zaria, Nigeria Received 7 May...Pyrochlore mineralization; Nigeria; REE patterns 1. Introduction In northern Nigeria, two groups of granites...the Jos plateau area. In 1954–1955, Fig. 1. Map of the Younger Granite ring-complexes of Nigeria (after...and (5) Fagam. Inset: Geological sketch map of Nigeria indicating the location of the Younger Granite |  | | Journal (article/letter/editorial) | | (Allen and Comstock,1880).Later the fluorides cryolite, pachnolite and prosopite were identified and...Tunnel, famous for Mt. Rosa-type pegmatite rich in cryolite and other rare aluminofluoride minerals. Pegmatite...pegmatite exposed in the Eureka tunnel, famous for cryolite and relatedminerals,intrudes Pikes Peak granite...1-15 (Eureka tunnel) and 65-2 (Cryolite mine-caved).They include cryolite and its alteration products,...according to the pegmatites in which they are found: cryolite pachnolite elpasolite ralstonite thomsenolite |  | | Journal (article/letter/editorial) | | (Adun-Chelon) GET: Cassiterite– columbite placers Jos Plateau Pitinga (Orlinogorsk) GET: loparite placers...Ulugtanzek 0.014–0.030 0.14–0.25 9–14 10n–100n Cryolite–zircon-(Y)– pyrochlore Katugin-(m) 0.015–0.030...030 0.12–0.40 15–17 10n–100n Cryolite–zircon–pyrochlore with fergusonite Taikeu-(m) Ust-Mramorny-(m)...important cassiterite–columbite placers at the Jos Plateau in Nigeria and the Pitinga deposit in Brazil (the |  | | Journal (article/letter/editorial) | | 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...cassiterite associated with the Younger Granites of Nigeria. © 2012 Elsevier B.V. All rights reserved. 1....granites. 7. Punctuated anorogenic magmatism in Nigeria We now turn, in our review, to a classic area of |  | Girei, Musa Bala, Li, Huan, Algeo, Thomas J., Bonin, Bernard, Ogunleye, Paul Olusegun, Bute, Saleh Ibrahim, Ahmed, Hafizullah Abba (2019) Petrogenesis of A-type granites associated with Sn–Nb–Zn mineralization in Ririwai complex, north-Central Nigeria: Constraints from whole-rock Sm Nd and zircon Lu Hf isotope systematics. Lithos, 340. 49-70 doi:10.1016/j.lithos.2019.05.003 | Journal (article/letter/editorial) | | mineralization in Ririwai complex, north-Central Nigeria: Constraints from whole-rock Sm-Nd and zircon Lu-Hf...mineralization in Ririwai complex, north-Central Nigeria: Constraints from whole-rock Sm-Nd and zircon Lu-Hf...mineralization in Ririwai Complex, north-central Nigeria: Constraints from whole-rock Sm-Nd and zircon Lu-Hf...Earth Sciences, China CE PT E 4 D Kano State Nigeria University of Geosciences, Wuhan 430074, China...Research and Training, Ahmadu Bello University Zaria, Nigeria 8 Department of Geology, Gombe State University |  | | Journal (article/letter/editorial) | | NORTHERN NIGERIA) EBO GAB IMEOKPARIA Department of Geology, University of Benin, Benin City (Nigeria) (Received...northern Nigeria). Chem. Geol., 47: 261--283. The Kigom igneous complex of northern Nigeria is a small...occupying a rectangular N--S province in central Nigeria (Fig. 1). In general, magmatism began in the north...an area of 36 km2; ~ 26 km southwest of Jos in central Nigeria (Fig. 1). The complex is circular in outline...and distribution map of the Younger Granites of Nigeria. 264 15° 36' 8° 39' L EGEND Albite-rieb¢ckite |  | | Journal (article/letter/editorial) | | measurements from seven ring complexes in central Nigeria provide evidence for a systematic age trend along...peak of anorogenie magmatism occurred in the Jos Plateau region about 1 6 4 • ago. Although a small syenitetrachyte...overall southerly decreasing age trend in the Niger-Nigeria province of West Africa. Isotopic measurements...spectrum has also been noted at the Shere Hills, near Jos, and at Liruei, near Kano, and may be representative... ..... " Fig. 1. Ring complexes in Central Nigeria, younger granite and syenite intrusions investigated |  | | Journal (article/letter/editorial) | | MINERALIZATION OF THE AMO YOUNGER GRANITE (NORTHERN NIGERIA) COMPLEX E.G. IMEOKPARIA Department of Geology...Geology, University of Ibadan, Ibadan (Nigeria) (Received August 10, 1982; revised and accepted January 26...mineralization of the Amo Younger Granite Complex (northern Nigeria). Chem. Geol., 40: 293--312. The Amo Complex forms...one of the prominent ring intrusions in the Jos Plateau and it is lithologically composed of granite...INTRODUCTION The Mesozoic Younger granites of northern Nigeria are high-level anorogenic ring complexes that range |  | | Journal (article/letter/editorial) | | extractedfor centurieswith tin in Malaya and in Nigeria. Pyrochlorewas a by-productof iron mining at S•ve...that appear to be near to the roof-pendants. In Nigeria, transitionalperiodsbetweenphasesare thoseof hybridization...phases. Sub-standard grades remain disseminated. In Nigeria, ore-granitescontainbiotite, in the Congomostly...columbiteand xenotime in the richestHarwell graniteof Nigeria is distinctlystreaky. Helvite, previously consideredas...partsof the Nigeriancomplexes, mainly"off" the plateau. The hardKaffo granitecontains0.25% Nb•O,, accompanied |  | | Journal (article/letter/editorial) | | ALBITE-RIEBECKITEGRANITE, LIRUEI GRANITE RING-COMPLEX, NORTHERN NIGERIA I.P. ORAJAKA Department of Geological Sciences...Anambra State University of Technology, Enugu (Nigeria) (Received November 20, 1985; accepted for publication...ranite, Liruei Granite ring-complex, northern Nigeria. Chem. Geol., 56 : 85--92. The Kaffo Valley al...1. Introduction The Chad Basin of northeastern Nigeria has recently been the focus of intense exploration...geological map of Nigeria showing the location of the Younger Granites. plex, northeastern Nigeria). Data on |  | | Journal (article/letter/editorial) | | Department of Geology, Ahmadu Bello University, Zaria, Nigeria Received: June 23, 1987/Revised version received:...investigations in the Younger Granite Province of Nigeria have revealed that precious and semi-precious minerals...ia ~l'rlar Fig. 1. Geological sketch map of Nigeria indicating the area of study 35 ilar to, but...changes are not recorded in every locality in Nigeria. However three petrologically contrasting assemblages...accessory minerals include zircon, astrophyllite, cryolite, pyrochlore and fluorite. Albitization does not |  | | Journal (article/letter/editorial) | | com/locate/lithos Fluid geochemistry in the Ivigtut cryolite deposit, South Greenland Jasmin Köhler a , Jens...Greenland is world-famous for its hydrothermal cryolite deposit [Na3AlF6] situated within a strongly metasomatised...the fluid present during the formation of the cryolite deposit and thermodynamic modelling allows to...were measured from crushed inclusions in quartz, cryolite, fluorite and siderite. The δ13C values of about...concentration in F (and Na) may indicate that the cryolite body and its associated fluid inclusions could |  | | Journal (article/letter/editorial) | | placers, in the Republic of Zaire (Congo Kinshasa), Nigeria, and — recently — Malaysia. The slags, containing...Central Plateau of France, were examined and described in detail by Aubert (1966). 5. In Nigeria, as we...pyrochlore — invariably associated with zircon and cryolite — and the accessory RE minerals: gagarinite, hastrfasite...concentrations of the pentoxide. Niobium, zirconium, cryolite concentrates, and feldspar concentrates are economic...associated with areas where fluorine minerals grow (cryolite and other fluorides) and consists mainly of tantaliferous |  | | Journal (article/letter/editorial) | | depending on the melt composition: quartz and cryolite associate with the silica richest aluminosilicate...experimental aluminosilicate melts equilibrated with cryolite, topaz, and aluminofluoride melt coincide in major...component proportions with the bulk compositions of cryolite and topazbearing granites and melt inclusions...ring model system, lithium–fluorine granites, cryolitebearing granites, flu oride salt melt, liquid...crystallization conditions of fluorinerich rocks, such as cryolite and topazbearing granites and peg matites. |  | 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) | | 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...within-plate alkaline ring complexes in north-central Nigeria. These complexes consist mainly of A-type granites...Dutsen Wai and Ropp ring complexes, north-central Nigeria. These data, together with previously published...and 200 km wide, extending from Niger to central Nigeria (Figure 1a; Black et al. 1985; Kinnaird and Bowden |  | Bowden, P., Bennett, J. N., Kinnaird, Judith A., Whitley, J. E., Abaa, S. I., Hadzigeorgiou-Stavrakis, Penelope K. (1981) Uranium in the Niger-Nigeria Younger Granite Province. Mineralogical Magazine, 44 (336) 379-389 doi:10.1180/minmag.1981.044.336.03 | Journal (article/letter/editorial) | | 1981, VOL. 44, PP. 379 89 Uranium in the Niger-Nigeria Younger Granite Province P. BOWDEN, J. N. BENNETT...Department of Geology, Ahmadu Bello University, Zaria, Nigeria PENELOPE K. HADZIGEORGIOU-STAVRAKIS Department...sedimentary uranium deposits may also be found in Nigeria if the tectonic and sedimentological controls were...times (Niger) to the end of the Jurassic period (Nigeria). Since the complexes are petrologically similar...Niger uranium deposits may also have operated in Nigeria. In fig. 5, the volcanic feeders (Table III) exposed |  | | Book | | 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 |  | | Report (volume) | | fluorine chemicals; in manufacturing artificial cryolite and aluminum fluoride for the aluminum industry;...tantalum, and columbium occurs in Jurassic granite in Nigeria. Pegmatites in Egypt, South Africa, Uganda, and...--------------------------------- B~~d ~~g!da1c9~~~n Nigeria 1 2 Jos and Bukuru districts- Akwan and Arufu lead-zinc...9°55' N. 7°50' N. 8°48' E. 9°12' E. Fluorite, cryolite, to{laz, pyrochlore, cassiterite, columbite, tantalite...granites of Nigeria contain a variety of fluorine minerals, including accessory fluorite, cryolite, thomsenolite |  | | Journal (article/letter/editorial) | | crystals are well known from the Eureka tunnel cryolite locality. Here, crystals reach almost 4 cm although...pegmatites associated with albitites of the Jos Plateau and from near Korot, and excellent gem zircon...associated with sapphire is mined at Antan, Kaduna, Nigeria. Beautifully limpid, orange-red faceting rough |  | | Report (issue) | | Democratic Republic of the Congo (Congo [Kinshasa]), Nigeria, Rwanda, and Uganda. Brazil has about 40 percent...Donsa Muiane Eagle Morrua Marropino Pilanesberg Jos Plateau 90° Ghurayyah Lovozero Abu Dabbab Nuweibi...Nigerian pegmatite belt Nigeria LCT pegmatite S 8.00 6.00 Jos Plateau Nigeria Alkaline granite and...Ma NA NA NA NA Melcher and others, 2015 Jos Plateau 700 Ma and 400 Ma (?) NA NA NA Placer Pollard...Democratic Republic of the Congo (Congo [Kinshasa]), Nigeria, Rwanda, and Uganda, has been conducted mainly |  | | Journal (article/letter/editorial) | | mineralized (cassiterite and, subordinately, W, REE, Zr, cryolite, Nb, Be, Ta, etc.) and related tin deposits are...to the situation observed, for example, in the Nigeria Younger Granites Province (MacLeod et al., 1971;...noticed. In the Pitinga Mine, important deposits of cryolite associated to the apogranitic phase have been...the granites are Permian (Niger) or Jurassic (Nigeria).(Black and Girod, 1970). The age differences between... have been exploited for tin in the province. Cryolite (Na3A1F6), Zr, REE, and Y are also concentrated |  | | Journal (issue) | | range of emeralds and green beryls from Central Nigeria. Detailed work on inclusions, compositions of hosts...deposits are exploited, e.g. in Australia, Thailand, Nigeria and China (Coenraads, 1992a; Guo et al., 1992)...on sapphire from other basaltic origins (e.g. Nigeria and Australia). She described as significant morphological...Harding, R.R., 1990. Gemstone prospects in Central Nigeria. Journal of Gemmology, 22, 4,195-202 Karr, c.,...117-141 117 Emerald and green beryl from Central Nigeria Dr Dietmar Schwarz1, Dr Jan Kanis2 and Dr Judith |
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