 | | Journal (article/letter/editorial) | | ProterozoicOuter ShelfManganeseandIron Depositsat Otjosondu (Namibia)Relatedto the DamaranOceanicOpening BERNHARDBiJHN...1978; Ferran, 1980). Late The Damara Sequenceof Namibia developed Proterozoiciron-formations associated...1986). Angola Ă - o ⢠too kl⢠_ Namibia 21' /' OTJOSONDU iliiii?: ii _ . :::: 22* 0 17' 20...SMZ= Southern Marginzone. Mn & FeDEPOSITS, OTJOSONDU, NAMIBIA 1395 OTdOSONDU SEQUENCE SOUTHERN CENTRAL...ZONE TROUGH (SOUTHERN ZONE) OKAHANDJA â˘MENT I BIOTITE UPPER m QUARTZITES ⢠t ANO / m SCHISTS lB' |  | B HN, B., OKRUSCH, M., WOERMANN, E., LEHNERT, K., HOERNES, S. (1995) Metamorphic Evolution of Neoproterozoic Manganese Formations and their Country Rocks at Otjosondu, Namibia. Journal of Petrology, 36 (2) 463-496 doi:10.1093/petrology/36.2.463 | Journal (article/letter/editorial) | | depending on their paragenesis. They indicate very Namibia were subjected to high-^T-low-P metamorphism dur-...WORD& manganiferous sediments; Damara Orogeny; Namibia; formations. They are correlated with peak pressure...Manganese Formations and their Country Rocks at Otjosondu, Namibia JOURNAL OF PETROLOGY VOLUME :t(i NUMBER...and Miller (1983a) tentatively correlated the Otjosondu ores with the Chuos Formation, which bears glaciomarine...metallogenetic model (Buhn et al., 1992, 1993*). The Otjosondu Mn ore-bearing unit consists of at least two manganese |  | CABRAL, A. R., MOORE, J. M., MAPANI, B. S., KOUBOVA, M., SATTLER, C.- D. (2011) GEOCHEMICAL AND MINERALOGICAL CONSTRAINTS ON THE GENESIS OF THE OTJOSONDU FERROMANGANESE DEPOSIT, NAMIBIA: HYDROTHERMAL EXHALATIVE VERSUS HYDROGENETIC (INCLUDING SNOWBALL-EARTH) ORIGINS. South African Journal of Geology, 114 (1) 57-76 doi:10.2113/gssajg.114.1.57 | Journal (article/letter/editorial) | | CONSTRAINTS ON THE GENESIS OF THE OTJOSONDU FERROMANGANESE DEPOSIT, NAMIBIA: HYDROTHERMAL EXHALATIVE VERSUS...Department of Geology, University of Namibia, Private Bag 13301, Windhoek, Namibia e-mail: b.mapani@unam.na M...Africa ABSTRACT The stratigraphic position of the Otjosondu ferromanganese deposit in the Neoproterozoic Damara...the Swakop Group, as previously proposed. The Otjosondu ore comprises ferromanganese silicate-oxide assemblages...and manganese formations. The formation of the Otjosondu ferromanganese deposit is therefore unrelated |  | | Journal (issue) | | ........................pg. 3 Actinolite from Namibia by Justin Zzyzx .................................we bring you eleven articles about locations in Namibia that do not receive much publicity. It is easy...legendary deposits such as Tsumeb, the Brandberg region and the Erongo Mountains. Alpine clefts, huge soda...Mountains, located in the southwestern part of central Namibia. The Gamsberg Mountain is the most important landmark...Fluorapatite Fluorapatite is quite rare from the region but can be found as complex, colorless crystals |  | Essene, Eric J., Claflin, Christopher L., Giorgetti, Giovanna, Mata, Pilar M., Peacor, Donald R., Ă rkai, PĂŠ ter, Rathmell, Mark A. (2005) Two-, three- and four-feldspar assemblages with hyalophane and celsian: implications for phase equilibria in BaAl2Si2O8-CaAl2Si2O8-NaAlSi3O8-KAlSi3O8. European Journal of Mineralogy, 17 (4) 515-535 doi:10.1127/0935-1221/2005/0017-0515 | Journal (article/letter/editorial) | | OH)-apatite, Brt = barite, BC = barytocalcite, Bi = biotite, C = graphite, Cc = calcite, Cl-Ap = chlorapatite...parameters of 20 samples of hyalophane from Otosondu, Namibia, and found that nearly all were monoclinic. Viswanathan...in samples from manganese-rich rocks from Otjosondu, Namibia. Viswanathan & Kielhorn (1983a) reported...coarse interlocking two-phase assemblage from Otjosondu involving hyalophane (Cn51Ab32Or36) and celsian...exsolved albite in sodian hyalophane from Otjosondu, Namibia. Coats et al. (1984) found coexisting hyalophane |  | | Report (issue) | | exhalatives. Association: Manganoan aegirine, manganoan biotite, paracelsian, jacobsite, hausmannite, rhodochrosite...and LÂş angban, VĂarmland, Sweden. In the Simplon region, Valais, Switzerland. In the USA, from Franklin...Burultas deposit, west of Lake Balkhash. In Namibia, at Otjosondu. From Piggery Creek, Broken Hill, New South |  | | Book | | Mountainland The Central Northern to Northwest Region including Damaraland The Central Namib Desertand...Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and the Diamonds 44 49 241 254 272 275... 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 |  | | Report (issue) | | Geological Survey of Namibia) MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY OF NAMIBIA Director: B.G. Ho...Ho al BULLETIN 1 Type mineralogy of Namibia by Vaughan C. Daltry Editor: Clare Kennedy Galloway Obtainable...the Geological Survey P.O. Box 2168, Windhoek, Namibia Price Local (+GST) Abroad (Post Free) R20.00 R25... ______ ........ Abstract The type mineralogy of Namibia is reviewed. One hundred and thirty-nine (139)...Twenty-three (23) unnamed phases are also listed. Namibia ranks second to Zaire as the most productive African |  | | Journal (article/letter/editorial) | | depositsof Madhya Pradesh-Maharashtrabelt, India, Otjosondu, S.W. Africa and Mount Brandnuten,S. Norway are...plagioclase felspar,blanfordite,apatite,accessory biotite and quartz. Both the aboveworkersconfirmedthe hybrid...MANGANESE FORMATION OF OTJOSONDU, S.W. AFRICA The manganese ore deposits of Otjosondu,S.W. Africa havebeenshown...alwayspresentat the contactof quartziteand itabirite and biotite schists. Accordingto de Villiers (5) the chief...Precambrian--Siberia, Sagan-Zaba(near Lake Baikal), Baikal region, Ukraine. Cambrian-â˘Qussinsk, W. Siberia,Kazakhstan(Cambrianto |  | | Journal (article/letter/editorial) | | southwestern Central Zone of the Damara Belt, Namibia and implications for tectonic setting L. Longridge...southwestern Central Zone of the Damara Belt, Namibia and implications for tectonic setting, LITHOS (2017)...SOUTHWESTERN CENTRAL ZONE OF THE DAMARA BELT, NAMIBIA AND IMPLICATIONS FOR TECTONIC SETTING IP T Longridge...pressures of 4.9 kbar for a garnet-cordierite-biotite-orthopyroxene schist. These temperatures confirm...with the SC R Gariep Belt found in southern Namibia and the Northern Cape Province of South Africa |  | | Journal (article/letter/editorial) | | stability of both minerals is constrained in the region of low f CO2 . The paper reports data on the FeâSiâO...First, Fig. 1 shows two subparallel lines in the region of high oxygen fugacity corresponding to the reactions...reactions (1), (8), and (5) and encompasses the region of log f O2 values at which braunite is stable...diagram, below the reaction lines 7 and 6. This region of relatively low log f O2 values corresponds to...previous diagram (Fig. 1), it corresponds to the region in the vicinity of reaction line 4. Because of |  | | Journal (article/letter/editorial) | | zincian hercynite, zincian staurolite, cordierite, biotite, almandine, 237 Antrim Ballyclare, cowlesite,...cordierite, biotite, talc, almandine, I99 and M23 Tombstone, tlapallite, 183 South-West Africa (Namibia) Onganja...Onganja mine, cuprite, 5o5 Otjosondu, celsian, barian orthoclase, 294 Arkansas Buckeye Mtn., Turquoise |  | | 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 |  | | Journal (article/letter/editorial) | | CaâMnâAlâFe3Ăž quadrilateral. 1: Amphibolite-facies, Namibia (Vermaas, 1952; Dunn, 1979). 2: Amphibolite facies...garnet in gneiss with quartz, microcline, albite, biotite, epidote, hematite, titanite and zircon). 9: U...MnâZn-spinel, quartz. 12. Amphibolite facies, Otjosondu, Namibia (BâŹuhn et al., 1995), with braunite, jacobsite...-bearing calderite-andradite garnets from Otjosondu, SWA=Namibia. Zeit Krist 189: 43â56 Andrut M, Wildner...manganese formations and their country rocks at Otjosondu, Namibia. J Petrol 36: 463â496 Cenki-Tok B, Ragu A |  | | Report (chapter) | | glaciated margin: insights from the Chuos Formation, Namibia MAXWELL A. LECHTE1*, MALCOLM W. WALLACE1 & KARL-HEINZ...Australia 2 Geological Survey of Namibia, 1 Aviation Road, Windhoek, Namibia M.A.L., 0000-0002-3152-9009...unimelb.edu.au Abstract: The Chuos Formation of Namibia is the sedimentary product of the Neoproterozoic...oceans during the Sturtian. The Chuos Formation of Namibia records deposition during the Sturtian glaciation...2013a). The Chuos Formation is found throughout Namibia in three Pan-African orogenic belts, collectively |  | | Journal (article/letter/editorial) | | THE SOUTHERN MARGIN ZONE OF THE DAMARA OROGEN, NAMIBIA JORG H BREITKOPF Department of Geology, Unwers~tyof...Scmnce Pubhshers B V 112 12o 16° ANSOLAT NP NAMIBIA o~ 20° Occurrences of iron formahon Pre-Damara...Miller, 1 9 8 3 c ) Towns Kb-Kanblb, Ou-Outjo, Ot-Otjosondu, Sw-Swakopmund, T-Tsumeb, W-Wmdhoek Occurrence...1983c) are associated with Iron formation near Otjosondu m the eastern part of the Central Zone (Fig 1)...facms and metapehtm assemblages contain quartz, biotite, muscovite, chlorite and garnet A complete stratlgraphlc |  | | Journal (article/letter/editorial) | | ZONE. â˘1⢠â˘qUPRIYA ROF TABLE - 5 CONTINUED OTJOSONDU, S.W. AFRICA (ROPER, 1956) MANGANESE FORMATIONS... THE SHIVRAJPUR (CHLORITE ZONE), KAJLIDONGRI (BIOTITE ZONE ) AND GOLDONGRI HILL (PYROXENE- HORNFELS...PANCH MAHALS DT., GUJARAT, (ROY AND MUKHERJEE, BIOTITE 1964t RASUL, 1965) ZONE KAJLIDONGRI PYROLUSITE...diagenetic' reconstitution,the unmetamorphosed man- Otjosondu,S.W. Africa [braunite-bixbyite-jacobsiteand garnet...Aravalli Group,GangpurGroup,andKhondaliteGroup), Otjosondu,S.W. Africa and Mount Brandnuten,S. Norway,are |  | | Journal (article/letter/editorial) | | quartz, minor silicates (muscovite, chlorite, biotite, plagioclase, tourmaline), carbonate and apatite...mineral assemblage indicative of greenschist facies (biotite grade) metamorphism. Chemical compositions of ironstones...the central Flinders Ranges to the Yunta-Olary region in eastern South Australia (Sumartojo and Gostin...ferruginous Braemar ironstone facies in the Yunta-Olary region and the thinner Holowilena Ironstone (130 m) in...locally lenticular, is widespread in the Yunta-Olary region and a possible equivalent is present southwest |  | | Journal (article/letter/editorial) | | from the Proterozoic to Palaeozoic Damara Orogen (Namibia) are mostly characterized by ÂŽnal near-isobaric...DAMARA OROGEN: AN OVERVIEW The Damara Orogen of Namibia is a deeply eroded section through a Pan-African...map of the Central Zone of the Damara Orogen, Namibia, with the position of the Oetmoed Migmatite Granite...southern and central Damara Orogen. Isograds: (1) biotite-in; (2) garnet-in; (3) staurolite-in; (4) kyanite-in;... cordierite-in; (10) partial melting due to: biotite  K-feldspar  plagioclase  quartz  cordierite |  | Singletary, Steven J, Hanson, Richard E, Martin, Mark W, Crowley, James L, Bowring, Samuel A, Key, Roger M, Ramokate, Lepate V, Direng, Brets B, Krol, Michael A (2003) Geochronology of basement rocks in the Kalahari Desert, Botswana, and implications for regional Proterozoic tectonics. Precambrian Research, 121 (1) 47-71 doi:10.1016/s0301-9268(02)00201-2 | Journal (article/letter/editorial) | | NeoproterozoicâLower Paleozoic Damara belt exposed in Namibia. Limited outcrops of 2.05 Ga augen gneiss within...the Kalahari region of Botswana and adjacent parts of Zimbabwe, Zambia, Angola, Namibia, and South Africa...Africa (Fig. 1). Precambrian basement in this region, which is centered on the Kalahari Desert, is nearly...deposits of the Kalahari Group. East of the Kalahari region, Archean crust is exposed in the Zimbabwe and Kaapvaal...distribution of subsurface basement terrains in this region (e.g. Reeves, 1978; Hutchins and Reeves, 1980; |  | | Journal (article/letter/editorial) | | sheeted leucogranites within the Damara Orogen, Namibia J. A. Kinnaird* and P. A. M. Nex Uranium mineralisation...southern Central Zone of the Damara Orogen in Namibia; at RoĚssing, Valencia, the Ida Dome and Goanikontes...Formation boundary. Keywords: Granite, Mineralisation, Namibia, Uranium Since 2004, the development of new nuclear...exploration and particularly in southern Africa. Namibia constitutes a uraniferous province with known uranium...in sheeted leucogranites within Damara Orogen, Namibia 1 The inland branch of the Damara Orogen showing |  | | Journal (article/letter/editorial) | | Shear zone-related syenites in the Damara belt (Namibia): the role of crustal contamination and source...major shear zone in the Proterozoic Damara orogen (Namibia) constrain their sources and petrogenesis. Major...The Proterozoic to Phanerozoic Damara orogen of Namibia contains pre-orogenic to syn-orogenic syenites...within the Central Zone of the Damara orogen, Namibia. Abbreviations in inset: KZ Kaoko zone, NP northern...southern and central Damara orogen. Isograds: 1 biotite-in, 2 garnet-in, 3 staurolite-in, 4 kyanite-in |  | Dasgupta, Somnath, Bhattacharya, P. K., Banerjee, H., Fukuoka, M., Majumdar, N., Roy, Supriya (1987) Calderite-rich garnets from metamorphosed manganese silicate rocks of the Sausar Group, India, and their derivation. Mineralogical Magazine, 51 (362) 577-583 doi:10.1180/minmag.1987.051.362.12 | Journal (article/letter/editorial) | | occurrence of calderite-bearing garnet from Otjosondu, Namibia, and the same sample was re1 Department of...co-metamorphosed to amphibolite facies (Roy, 1966). Garnet-biotite thermometry in metapelites estimates temperature |  | Longridge, L., Kinnaird, J., Gibson, R., Hawkesworth, C., Armstrong, R. (2018) Crustal recycling in the Damara Belt, Namibia, and interaction of the Congo and Kalahari Cratons â evidence from zircon U-Pb, Hf and O isotopes. South African Journal of Geology, 121 (3) 237-252 doi:10.25131/sajg.121.0018 | Journal (article/letter/editorial) | | R ON G Crustal recycling in the Damara Belt, Namibia, and interaction of the Congo and Kalahari Cratons...southwestern Central Zone of the Damara Belt (Namibia) are used to decipher the process of remobilization...Congo Craton The Congo Craton crust in northern Namibia and Angola is made up of Archaean-Siderian orthogneisses...Craton in Angola (Delhal et al., 1975; 1976). In Namibia, whole-rock Sm-Nd model ages and xenocrystic zircons...ages of Congo Craton basement inliers in northern Namibia and northwestern Botswana; 2022 Âą 15 Ma (Grootfontein |  | | Journal (article/letter/editorial) | | TsongoariâOmupokko Pb-Cu-Ba-Zn-Ag prospects, Kaokoland, Namibia Christoph D.K. Gauert Petrology and Economic Geology...the southern Kaoko Belt of northwestern coastal Namibia, several metamorphosed coticule, iron formation...quartzite host rock contains Mn- and Cu-bearing biotite and muscovite, Zn-bearing amphibole, hyalophane...10m and a length of 4.5 kilometres. Secondary biotite and amphibole are similarly enriched in trace elements...1980âs and 90âs by Rand Mines Limited and Rio Tinto Namibia Limited. Reserves for Tsongoari East and Omupokko |
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