 | Elliott, H.A.L., Wall, F., Chakhmouradian, A.R., Siegfried, P.R., Dahlgren, S., Weatherley, S., Finch, A.A., Marks, M.A.W., Dowman, E., Deady, E. (2018) Fenites associated with carbonatite complexes: A review. Ore Geology Reviews, 93. 38-59 doi:10.1016/j.oregeorev.2017.12.003 | Journal (article/letter/editorial) | | Canada c GeoAfrica, P.O. Box 24218, Windhoek, Namibia d Telemark, Fylkeshuset, Postboks 2163, 3103 Tønsberg...and mineralogi- 133 cal modifiers e.g. veined aegirine-albite fenite; brecciated orthoclase fenite. Here...biotite and hornblende to an 213 albite and aegirine-rich fenite near the contact. The stages involved...One 268 example of this process is the Okorusu fenite, Namibia, which displays undulating or 269 scalloped...Willem, Namibia (Reid and Cooper, 1992); Toror Hills, Uganda (Sutherland, 1965b) 343 and Okorusu, Namibia |  | | Journal (article/letter/editorial) | | width and contain arfvedsonite developed after aegirine-augite. As for top unit, thick veins (width > 10 cm)...include medium-grained K-feldspar, biotite, aegirine–augite, arfvedsonite, fluorite, calcite, barite, quartz...zoned as paragenesis of biotite, K-feldspar, aegirine-augite, arfvedsonite, calcite, quartz, fluorite, barite...recorded by the crystallization of prismatic aegirine-augite and spiculate arfvedsonite at adjacent to the...and accessories of fluorite, barite, quartz, aegirine-augite, arfvedsonite, and insignificant quantities |  | | Journal (article/letter/editorial) | | magmas: implications from natural carbonatites, Namibia B. Bühn Instituto de Geoci^encias, University... Summary Two bimodal carbonatite complexes in Namibia of Cretaceous age are explored as to the presence...geochemical evolution of low-Si carbonatite bodies in Namibia, and addresses the response of carbonatite compositions...Kalkfeld and Ondurakorume carbonatites in northern Namibia, which are part of the Cretaceous Damaraland Igneous...and Ondurakorume bimodal carbonatite complexes, Namibia (after Prins, 1981) lithosphere travelled NE over |  | | Book | | Mountainland The Central Northern to Northwest Region including Damaraland The Central Namib Desertand...s Onganja Mine and Surrounding Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and... Encyclopedia of the Mineralsof Namibia 443 Meteorites in Namibia Bibliography Index Photo credits...__ Republic of Namibia The President State House W°Ntdhoek FOREWORD Namibia is endowed with an...from near and far. Fine mineral specimen from Namibia are displayed in all the famous natural science |  | Lustrino, Michele, Melluso, Leone, Brotzu, Pietro, Gomes, Celso B., Morbidelli, Lucio, Muzio, Rossana, Ruberti, Excelso, Tassinari, Colombo C.G. (2005) Petrogenesis of the early Cretaceous Valle Chico igneous complex (SE Uruguay): Relationships with Paraná–Etendeka magmatism. Lithos, 82 (3) 407-434 doi:10.1016/j.lithos.2004.07.004 | Journal (article/letter/editorial) | | VC and the coeval Paresis granitoids (Etendeka, Namibia) are evidenced in this paper. The genetic similarities...latites (s.l.) of the Awahab Formation (Etendeka region, Namibia). D 2005 Elsevier B.V. All rights reserved...are located in Angola (Marzoli et al., 1999) and Namibia (Etendeka; Ewart et al., 1998a,b, 2004a,b; Thompson...mostly concentrated in the coastal Etendeka region in Namibia (Marsh et al., 2001; Ewart et al., 2004b)...Brazil, Bolivia, Paraguay, Uruguay, Angola and Namibia (Darbyshire and Fletcher, 1979; Almeida, 1983; |  | Trofanenko, J., Williams-Jones, A. E., Simandl, G. J., Migdisov, A. A. (2016) The Nature and Origin of the REE Mineralization in the Wicheeda Carbonatite, British Columbia, Canada. Economic Geology, 111 (1) 199-223 doi:10.2113/econgeo.111.1.199 | Journal (article/letter/editorial) | | Abbreviation Formula Silicates Aegirine Aeg NaFe3+Si2O6 Aegirine-augite Agt (Ca, Na)(Mg, Fe2+, Fe3+)Si2O6...minor biotite (5 vol %), albite (5 vol %), aegirine-augite (2 vol %), pyrite (2 vol %), and pyrochlore...altered to clinozoisite. Emerald-green, euhedral aegirine crystals up to 400 μm in diameter form clusters...calcite (10–15 vol %), together with minor aegirine-augite and riebeckite, and traces of apatite, rutile...feldspar and albite, and is rimmed by dolomite. Aegirine-augite was found as acicular crystals in the distal |  | | Journal (article/letter/editorial) | | intrusives with and without associated carbonatite, Namibia B. Bühn a,b,*, R.B. Trumbull c a Institut fur...from the Cretaceous Damaraland igneous province (Namibia), one with and one without associated carbonatite...Ijolite; Nepheline foidite; Nepheline syenite; Namibia * Corresponding author. Instituto de Geociências...Early Cretaceous Damaraland igneous province in Namibia, one of which is associated with carbonatite, while...Damaraland Igneous Province in northwestern central Namibia, and occur within 15 km of each other (Fig. 1) |  | Doroshkevich, A. G., Viladkar, S. G., Ripp, G. S., Burtseva, M. V. (2009) HYDROTHERMAL REE MINERALIZATION IN THE AMBA DONGAR CARBONATITE COMPLEX, GUJARAT, INDIA. The Canadian Mineralogist, 47 (5) 1105-1116 doi:10.3749/canmin.47.5.1105 | Journal (article/letter/editorial) | | sövite samples are calcite, apatite-(CaF), aegirine-augite, aegirine, magnetite, pyrochlore, phlogopite, zircon...rutile are minor minerals. The pyroxene is aegirine-augite, as in the sodic fenites, and forms idiomorphic...sövites. The Kalkfeld carbonatite complex, in Namibia, can be considered a good example of the important...associated with carbonatite at Amba Dongar, India, and Okorusu, South West Africa. Inst. Mining Metall. Trans |  | | Journal (article/letter/editorial) | | Tanzania, and one occurrence in Zambia); (b) Namibia and Angola; (c) Eastern Russia (East Tuva, Enisei...by the development of Na- and Kamphiboles, aegirine-augite, K-feldspar, albite, perthite, mesoperthite...2 6.2 2.7 Sokli 62.9 21.6 34.4 13.5 21.5 27.8 Okorusu 8.2 0.2 2.7 2.7 32.7 4.9 Lueshe 4.4 2.8 64.6 0...Fe 3+ ±Ca ±Al Na K Na and K amphibole Aegirine-augite K-feldspar Mesoperthite Antiperthite Albite...recognised, such as the Swartbooisdrift complex, Namibia (Drüppel et al. 2005) and the Gifford Creek ferrocarbonatite |  | | Book | | REPUBLIC OF NAMIBIA - MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY THE MINERAL RESOURCES OF NAMIBIA FIRST...ENERGY Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer of copper, lead, zinc, cadmium...unpublished. It is evident that mineral exploration in Namibia, as elsewhere. has changed from serendipitous discoveries |  | Pirajno, Franco, González-Álvarez, Ignacio, Chen, Wei, Kyser, Kurt T., Simonetti, Antonio, Leduc, Evelyne, leGras, Monica (2014) The Gifford Creek Ferrocarbonatite Complex, Gascoyne Province, Western Australia: Associated fenitic alteration and a putative link with the ~1075Ma Warakurna LIP. Lithos, 202. 100-119 doi:10.1016/j.lithos.2014.05.012 | Journal (article/letter/editorial) | | Shawa and Gunga (Zimbabwe), Okorusu, Kalkfeld and Ondurakorume (Namibia), the giant Bayan Obo (China)...association of K-feldspar, sodic pyroxene (aegirine-augite), quartz, alkali amphibole (?), and accessory...feldspar SC series and sodic pyroxenes (aegirine-augite). Abundant heavy mineral inclusions in feldspars...fenitic haloes, whose mineralogy is dominated by aegirine, apatite, phlogopite, magnetite and pyrochlore...and Taylor, 1996). Sodic pyroxene is generally aegirine with a high NaFe3+Si2O6 component and with TiO2 |  | | Book (edition) | | localities as inclusions in the limestone”’ (italics mine). Actually, the first published description of...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted...country rock around alkalic complexes; up to 25% aegirine-augite, minimum of 52% StOz: Mafic-metasomatites of...rock around alkalic complexes; more than 25% aegirine-augite. Ringite Table 1-2. Nomenclature for Hybrid...Silicates > calcite Kasenite Hollaite Ringite Aegirine sOvite Silicocarbonatite Rocks Silicates 90-100% |  | | Journal (article/letter/editorial) | | country rocks of the Kalkfeld carbonatite complex, Namibia. The fluid inclusion population provides a unique...crust-derived complexes (open) in north central Namibia. their host rock composition (Rankin and Le Bas...Dongar, India; Simonetti and Bell, 1995; Okorusu F deposit, Namibia; Van Zijl, 1962), or for alteration of...encountered at the Kalkfeld carbonatite complex (Namibia), where a volatile- and alkali-rich carbonatitic...crust-derived melts on the African continent in northern Namibia (Fig. 1). K⫺Ar age determinations on biotites of |  | | Journal (article/letter/editorial) | | complex in western India near the Chhota Udepur region is intrusive into basalts of the Deccan Volcanic...complex in western India near the Chhota Udepur region is intrusive into basalts of the Deccan Volcanic...small exposures seen allthe around thePetrographic region. PetAmbadungar village,village, whereaswhereas...whereaswhereas small exposures are seen are all around region. rographic and geochemical characteristics of alkaline...Manka-Nakhal-Saidivasan region, consisting of particularly in and around the around Manka-Nakhal-Saidivasan region, consisting |  | | Report (chapter) | | inland and kimberlite diatremes furthest inland. Namibia is similar (Prins 1981). The scale of these distributions...(non-carbonatitic) volcanic centres corresponding to the Kenyan region of the outer zone shown in Fig. 2. Between these...rift valley, particularly those in the Kishalduga region, are almost identical (cf. Figs 6(a) and 6(b),...indicate that they were no longer stable in the magma. Augite was also being precipitated in abundance. It seems...Ruri ($33) (wet analysis by H. Lloyd); 7, Aegirine-augite phenocryst in feldspar-phyric phonolite lava |  | | Book | | magmatism of the eastern margin of the Atlantic (Namibia, Angola) or the western African kimberlites do...Mafic-Ultramafic Magmatism in the Southwest Uganda Region of the African Rift: Implications from Experimental.... . . ... 3 The Crust Under the Canary Islands Region ............. 4 Network of Fractures and Identity...Identity of Vertical Movements in the Canary Islands Region ........................... 4.1 Transoceanic and...African craton (200-180 Ma); Lebombo (195-190 Ma), Namibia (165-120 Ma), Chilwa (139 Ma), Luderitz (130 Ma) |  | Kozlov, Evgeniy, Fomina, Ekaterina, Sidorov, Mikhail, Shilovskikh, Vladimir, Bocharov, Vladimir, Chernyavsky, Alexey, Huber, Miłosz (2020) The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry. Minerals, 10 (1) 73 doi:10.3390/min10010073 | Journal (article/letter/editorial) | | (e.g., [74–76]). Importantly, Mongolia [52,53], Namibia New Zealand Norway [58], Russia [59–64], South...Vuoriyarvi alkaline-ultrabasic carbonatite massif (Kola region, Russia) is one of more than 2. Geological Setting...Vuoriyarvi alkaline-ultrabasic carbonatite massif (Kola region, Russia) is one of more than massif is complex...KAlSi3 O8 Phlogopite, KMg3 (AlSi3 O10 )(F,OH)2 Aegirine, NaFe3+ Si2 O6 Albite, NaAlSi3 O8 Zircon, ZrSiO4...calcite, Ti-rich phlogopite, apatite, Ti-rich aegirine, and albite are present in and barium-free microcline |  | | Journal (article/letter/editorial) | | barite, pyrochlore, fluorite, phlogopite, and aegirine. The grain size is highly variable and porphyritic...assemblage of anhedral to subhedral albite, aegirine –augite, and variable proportions of microperthite...associated with carbonatite at Amba Dongar, India, and Okorusu, South West Africa: metasomatic feldspar rocks |  | | Report (issue) | | for foreign countries, if a given name refers to a mine or deposit, a nearby location or administrative...names may be used to refer to a single deposit or mine. For large deposits or mineralized areas, a 3 single...third order administrative area, basin/formation/region(area)/deposit, and deposit/site name. Guano and...third order administrative area, basin/formation/region(area)/ deposit, deposit/site name, deposit type...information in the next two fields, .Basin/Fmt/Region (area)/Deposit and Deposit/Site_Name, is meant |  | | Book | | basic understanding of the geology of an area or region will never happen without initial observation of...Malawi Mali Mauritania Mauritius Morocco Mozambique Namibia Niger Nigeria Reunion (France) Rwanda São Thomé...Democratic Republic of Congo were also felt by Angola, Namibia, Rwanda, Uganda and Zimbabwe. The long-term implication...(1872) on East Africa, in which the Great Lakes region of central eastern Africa is very poorly figured...Group of Morocco and the Damar metasediments of Namibia). In some cases these rocks are at very low metamorphic |  | | Book (edition) | | Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...abbreviated, e.g. canton (Switzerland), vilayet (Turkey), region (Chile), kray and oblast (Russia). The country...by Mobutu, and is now the Katanga administrative region again. The former Kivu province is now divided...United States or of the Upper Silesian historical region in Poland, where the importance of ore-bearing...2-2.5. D = 7.22. In ref!. light gray 1.589. With aegirine. manganneptunite. and serandite. with greenish |  | | Book | | papers and 19 geological maps in Western Australia, Namibia and Greenland. Throughout his career, which has...4.3.9 The Brandberg West Greisen Vein Systems, Namibia . . 4.3.10 The Kalguta Mo-W-Be-Bi Greisen System.... . . . . . . . . . . . . . . 6.5.1 Navachab, Namibia. . . . . . . . . . . . . . . . . . . . . . . ....Cu Deposits of the Matchless Amphibolite Belt, Namibia . . . . . . . . . . . . . . . . . . . . . . . 7...Pb-Zn-Cu-Ag-V Deposits of the Otavi Mountain Land, Namibia . . . . . . . . . . . . . . . . . . . . . . . |  | | Report (volume) | | magmas. Initial (or residual) melts from such a region, as distinct from those from greater depths, would...solidus approximately coinciding with the inflexion region in some kimberlite geotherms (about 180km). Phlogopitebearing...(Olafsson & Eggler 1983). For convenience the stability region of spinel peridotite, with or without amphibole...high levels in the mantle (in the felsic stability region), volatiles could migrate along the geotherm only...P-Trelations of detached melt bodies rising from a region of accumulation on a geotherm (G) along an adiabatic |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...Springfield show ( 1995: 582). Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's...property of, the old Madawaska uranium mine (called the Faraday mine before 1964). The mineral assemblage...measuring 3 x 3 cm perched on prismatic black aegirine crystals, is in the Gilles Haineault collection...Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized minerals in the |  | | Report (issue) | | Kearns 12. Post-Paleozoic magmatism in Angola and Namibia: A review . . . . . . . . . . . . . . . . . . ...propagation into the southern Tyrrhenian backarc region. . . . . . . . . . . . . . . . . . . . . . . ....Saharan zone, Cameroon volcanic line, Angola and Namibia, and the East African Rift system. This Special...studies of xenoliths from the lower crust in the region are from the Arabian plate, where juvenile Neoproterozoic...al., 2002). The upper felsic crust of the Bayuda region consists of abundant cratonic material reworked |
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