 | | Report (issue) | | SURVEY NAMIBIA 1990 Open File Report MRS 12 2 Abstract Niobium-tantalum mineralisation in Namibia occurs...basement rocks of the Namaqualand Metamorphic Complex, and with rare metal pegmatites of late Namibian...by-products of Tin-mining operations in central Namibia (Uis, Nainais, De Rust). Prominent niobium-tantalum...pegmatites occur in the Tantalite Valley in southern Namibia and have been mined for a long time on a small...basement rocks of the N'amaqualand Metamorphic Complex 2.1.1 Tantalite Valley pegmatites 2.1.1.1 Witkop |  | | Journal (article/letter/editorial) | | K-Ar ages of the Brandberg and Okenyenyaigneous complexes, north-western Namibia Received: 10 August...intrusive units of the Brandberg and Okenyenya igneous complexes, northwestern Namibia, confirm the Early...contemporaneous, although the range of ages from Brandberg, 135.2 _+ 1.5 to 125.4 + 1.3 Ma, suggests a rather...0.7 Ma. The mean K - A r age of the Okenyenya complex is essentially equivalent to previously determined...dating of this complex (129.1-123.4Ma). K - A r chronology for the Brandberg complex is in conflict with |  | | Journal (article/letter/editorial) | | complexes and associated mineralisation in Namibia (Brandberg and Erongo) related to the opening of the South...Mount Weld and Gifford Creek ferrocarbonatite complex in Western Australia, the controversial Bayan Obo...events. The causes and mechanisms of rifting are complex and are beyond the scope of this contribution,...magmatic systems and carbonatites from Namibia (Brandberg, Erongo), South Africa (Kruidfontein, Goudini)...Goudini), Western Australia (Mount Weld and Gifford complex) and China (Bayan Obo and the carbonatites of the |  | | Journal (article/letter/editorial) | | resources of anorogenic alkaline complexes in Namibia: A review F. Pirajno a a Geological Survey of...resources of anorogenic alkaline complexes in Namibia: A review, Australian Journal of Earth Sciences:...resources of anorogenic alkaline complexes in Namibia: A review F. PIRAJNO Downloaded by [Dalhousie...Plain Street, East Perth, WA 6004, Australia. In Namibia there are numerous anorogenic alkaline complexes...carbonatites, mineralization, Namibia. INTRODUCTION In southwestern Africa (Namibia, southern Angola and northwestern |  | | Journal (article/letter/editorial) | | diversity in Cretaceous anorogenic granites from Namibia and implications for A-type granite genesis R.B...complexes in the Damaraland of west – central Namibia are silicic in composition. Although all have trace...five largest silicic complexes (Paresis, Erongo, Brandberg, Cape Cross, Gross Spitzkoppe) that provide...involved, and their relative proportions. The Paresis complex has an isotopic signature (d18O= + 9x , eNd130...address: Geological Survey of Namibia, 1 Aviation Road, Windhoek, Namibia. 0024-4937/$ - see front matter |  | | Journal (article/letter/editorial) | | Gross Spitzkoppe and Klein Spitzkoppe stocks in Namibia: Topaz-bearing A-type granites related to continental...Geological Survey of Namibia, P.O. Box 2168, 1 Aviation Road, Windhoek, Namibia c Rosh Pinab Zinc Corporation...Corporation (Pty) Ltd, P.O. Box 115, Rosh Pinab, Namibia Received 3 February 2006; accepted 4 December...The anorogenic Damaraland intrusive complexes in Namibia belong to the bimodal Paraná–Etendeka Large Igneous...in the Gross Spitzkoppe, Klein Spitzkoppe, Erongo, Brandberg, Messum, Cape Cross, and Paresis complexes |  | | Journal (article/letter/editorial) | | in Peralkaline Granites from the Amis Complex, Brandberg (Namibia): Evidence for Magmatic Pre-enrichment...Abstract The Amis Complex is a late intrusive phase associated with the Brandberg anorogenic granite...granite intrusion. It consists of peralkaline, arfvedsonite-bearing granitic and pegmatitic dikes and sills...around arfvedsonite pegmatite cores. Quartz-hosted melt inclusions in coarse-grained arfvedsonite granite...postmagmatic fluorine-rich aqueous fluids with the arfvedsonite granites caused local remobilization of REE |  | | Journal (article/letter/editorial) | | and Picrite Dykes of the Southern Etendeka Region, NW Namibia: Windows into the Role of the Tristan Mantle... Abundant dykes in the southern Etendeka region, NW Namibia, mostly contain 8–20% MgO. Almost all can...(ND), that may have fed part of the Huab sill complex. The dyke ages are constrained by their field relationships...forsteritic macrocrysts is cut by the 131 Ma Brandberg plutonic complex. Forward and inverse modelling of the...lithosphere thickness beneath and adjacent to NW Namibia, and there was intense melting ( Tp = >1500–1700°C) |  | | Book | | AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 , .,/, loringa tree . Khomas Highland...station Garub near Aus Nature conservation, Erongo 16 Welwitschia, Goboboseb Mountains 17 ....Northwest Region including Damaraland The Central Namib Desertand Escarpment The Spitzkoppen The Erongo Mountains...The Central Escarpment- The Nauchas-Gamsberg-Hakos Area West and South of Rehoboth The Central and South-CentralDeposits...Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and the Diamonds 44 49 241 254 272 275 |  | | Journal (article/letter/editorial) | | felsic magmatism in the Cretaceous Paresis ring complex, Namibia: evidence for mixing of crust and mantle-derived...the farthest inland of any felsic complex in the Cretaceous ring complex group. The other ring complexes...the Congo craton and related inliers in northern Namibia. The comendites are peralkaline, highly differentiated...All rights reserved. Keywords: Damaraland; Ring complex; Syenites; Comendites; Radiogenic isotopes; Magma...break-up of Gondwana in the early Cretaceous in an area then underlain by the Tristan mantle plume ŽPeate |  | | Journal (article/letter/editorial) | | assemblage includes quartz, microcline, aegirine, arfvedsonite, polylithionite, a zirconosilicate, pyrochlore...neck); (10) country rocks: granite and ophiolite complex; and (11) fault. The massif is part of a group...phenocrysts of aegirine and amphibole of the arfvedsonite composition. Albite, quartz, gittinsite, zircon...analyzed by rastering the electron beam over an area of 12 × 12 or 5 × 5 μm. Daughter minerals in inclusions...focused beam in a single spot or rastering over an area of 5 × 5 or 2 × 2 μm. Major minerals of the rock |  | | 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 |  | | 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 |  | Bernard, Cyrielle, Estrade, Guillaume, Salvi, Stefano, Béziat, Didier, Smith, Martin (2020) Alkali pyroxenes and amphiboles: a window on rare earth elements and other high field strength elements behavior through the magmatic-hydrothermal transition of peralkaline granitic systems. Contributions to Mineralogy and Petrology, 175 (9). doi:10.1007/s00410-020-01723-y | Journal (article/letter/editorial) | | stages. Amphibole consists of mostly unzoned arfvedsonite, leakeite, and katophorite, while pyroxene is...Manongarivo (Donnot 1963) in Madagascar, Amis in Namibia (Schmitt et al. 2002), Evisa in Corsica (Bonin...of in-depth studies, such as the Strange Lake complex which was first studied in the late 1980’s (e.g...poorly known, as is the case for the Manongarivo complex, for which the only available information is a...each complex; more detailed information is provided in Online Resource 1. Amis complex, Namibia The Amis |  | Jeffery, A. J., Gertisser, R., Jackson, R. A., O'Driscoll, B., Kronz, A. (2016) On the compositional variability of dalyite, K2ZrSi6O15: a new occurrence from Terceira, Azores. Mineralogical Magazine, 80 (4) 547-565 doi:10.1180/minmag.2016.080.018 | Journal (article/letter/editorial) | | Makhotko (1982) identified dalyite in the Murun Complex, Siberia, Russia, also providing additional quantitative...cross-cuts the nepheline syenites of the Straumsvola Complex, Antarctica. In 1988, an enstatite-sanidinephlogopite...Salitre–Serra Negra carbonatite-alkaline igneous complex, Brazil (Mariano and Francis, 1989; Mariano and...identified in the Strange Lake peralkaline granite complex, Canada, and noted to have nucleated heterogeneously...peralkaline granite intrusion of the Brandberg Complex, Namibia (Schmitt et al., 2000), the various lithologies |  | | Journal (article/letter/editorial) | | come in various flavors, commonly in the same complex. Consider for example the Ririwai, Tibchi and Kwandonkaya...1984, 1985), units containing members of the arfvedsonite–ferroleakeite solid solution, cryolite and pyrochlore...years ago in a transtensional environment in a region of overall compression, in the Sicily Channel of...press). Other xenoliths are rafted in from the source area. In contrast, one is struck, in a pluton of A-type...products formed from distinct parental magmas. The region is still in a state of active distension. The emplacement |  | | Journal (article/letter/editorial) | | followed by plagioclase, K-rich alkali feldspar and arfvedsonite to the final residues of hyper-enriched HFSE...these steps is prolonged crystallisation of arfvedsonite, which delays saturation of the magma with an... 2001; Yang et al., 2014), the Bokan Mountain complex in ur Southeastern Alaska (Thompson et al., 1982;...Na-rich amphibole and/or clinopyroxene (typically arfvedsonite and/or aegirine). They also have high contents...ferromagnesian mineral to crystallise would be arfvedsonite. Thus, it is probably no coincidence that in |  | Zhang, Hong-Fei, Parrish, Randall, Zhang, Li, Xu, Wang-Chun, Yuan, Hong-Lin, Gao, Shan, Crowley, Quentin G. (2007) A-type granite and adakitic magmatism association in Songpan–Garze fold belt, eastern Tibetan Plateau: Implication for lithospheric delamination. Lithos, 97 (3) 323-335 doi:10.1016/j.lithos.2007.01.002 | Journal (article/letter/editorial) | | Songpan–Garze fold belt covers a huge triangular area (N 200,000 km2), confined by the South China (Yangtze)...Nianbaoyeche granite (∼ 820 km2) is characterized by arfvedsonite in its mineral assemblage. Using both LA-ICPMS...Plateau. The belt, covering a huge triangular area with an area of more than 200,000 km2, is a folded Triassic...Neoproterozoic sediments, are distributed in the Danba area of the southern Songpan–Garze belt. These pre-Triassic...Songpan–Garze fold belt. Inset shows location of study area. NC = North China block; YC = Yangtze block; SC |  | | Journal (article/letter/editorial) | | consisting of variably altered primary K-feldspar, arfvedsonite, quartz, and zirconosilicates, and a core rich...(Salvi and Williams-Jones, 1990) and the Tamazeght complex in Morocco 325 (Salvi et al., 2000) provide direct...in other parts of the world, notably, the Amis (Namibia), Tamazeght (Morocco) and Khan Bogd (Mongolia)...1997) mid-Proterozoic intrusion extending over an area of 35 km2 on the border between Québec and Labrador...heterogeneous distribution of centimeter- to meter-thick arfvedsonite-rich cumulate layers. Domain-II forms the upper |  | | Journal (article/letter/editorial) | | similar to that of the neighbouring Ilõ´maussaq complex. Various mineral assemblages were used to reconstruct...albite + microcline + nepheline + sodalite + arfvedsonite + aegirine + aenigmatite + astrophyllite indicates...sodalite to analcime and the growth of aegirine on arfvedsonite. These late-stage reactions are constrained...as a small equivalent of the larger Ilõ´maussaq complex, in which identical differentiation processes proceeded...additionally characterized by the occurrence of complex Zr- and Ti-silicate minerals, such as eudialyte |  | | Journal (article/letter/editorial) | | (30ÿ35%), and alkali amphibole (ferrorichterite to arfvedsonite; 5ÿ12%), with accessory zircon, apatite and...Abdel-Rahman (1999), and this study. The shaded area de®nes the regional extent of the exposed Pan-African...(Abdel-Rahman and Martin, 1990a), the Abu Khruq ring complex (Landoll et al., 1994), the Kadabora pluton (El-Sayed...(El-Sayed, 1998), the Wadi Dib ring complex (Frisch and Abdel-Rahman, 1999), and the Mount El-Sibai pluton...N20ëW. No radiometric ages of rocks from the study area have been reported in the literature. In detail |  | Marks, Michael, Vennemann, Torsten, Siebel, Wolfgang, Markl, Gregor (2004) Nd-, O-, and H-isotopic evidence for complex, closed-system fluid evolution of the peralkaline Ilı́maussaq intrusion, south Greenland. Geochimica et Cosmochimica Acta, 68 (16) 3379-3395 doi:10.1016/j.gca.2003.12.008 | Journal (article/letter/editorial) | | 2003.12.008 Nd-, O-, and H-isotopic evidence for complex, closed-system fluid evolution of the peralkaline...indicate a closed system evolution of this igneous complex and support a mantle derivation of the magma. In...on the silica-saturated to oversaturated Puklen complex in the western part of the Gardar Province indicated...of a crustal component for the genesis of this complex (Marks et al., 2003). Nd isotope compositions for...oversaturated, and mixed complexes of the Damaraland, Namibia (Harris et al., 1990, 1999; Harris, 1995; Mingram |  | | Journal (issue) | | island. The eontribution of Birkenmajer deseribes a region not very familiar in literature. He gives a review...ductile middle erust. Estimates of shortening based on area balaneing are again of the order of slightly more...transmission of seismic energy through the tectonically complex overlying section (Fig. 3). 239 100 km Basel...ofIvrea (crossed ruling); CRL = Cremosina line complex, bounding the Ivrea-Ceneri body (narrow horizontal...Helvetic nappes and the External Massifs is similarly complex, yet did not produce a comparable effect, and that |  | Melluso, Leone, Guarino, Vincenza, Lustrino, Michele, Morra, Vincenzo, de' Gennaro, Roberto (2017) TheREE-and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich felsic melts. Mineralogical Magazine, 81 (2) 217-250 doi:10.1180/minmag.2016.080.122 | Journal (article/letter/editorial) | | and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich...Harvey] ABSTR ACT The Late Cretaceous Itatiaia complex is made up of nepheline syenite grading to peralkaline...elements, Itatiaia. Introduction THE Itatiaia igneous complex belongs to the Cretaceous-Cenozoic alkaline province...coeval tholeiitic magmatism, excluding the Cabo Frio area, at the end of the Rio de Janeiro coastline (Bennio...IN THE ITATIAIA COMPLEX (Angola, Namibia), and are represented by Brandberg, Erongo, Messum, Okenyenya |  | Tian, Li, Sun, Deyou, Gou, Jun, Jiang, Shan, Feng, Zhao, Zhang, Duo, Hao, Yujie (2022) Petrogenesis of the Newly Discovered Early Cretaceous Peralkaline Granitic Dikes in Baerzhe Area of Jarud Banner, Inner Mongolia: Implications for Deciphering Magma Evolution. Minerals, 12 (12) 1532 doi:10.3390/min12121532 | Journal (article/letter/editorial) | | Cretaceous Peralkaline Granitic Dikes in Baerzhe Area of Jarud Banner, Inner Mongolia: Implications for...Cretaceous Peralkaline Granitic Dikes in Baerzhe Area of Jarud Banner, Inner Mongolia: Implications for...the peralkaline granitic dikes from the Baerzhe area, with the aims to (1) constrain the magma source...amalgamated during the Paleozoic [29–31]. The study area was located in the south of the Xing’an block, adjacent...Jurassic to Cretaceous igneous were developed in this area in an extensional back-arc environment, which is |
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