 | | Journal (article/letter/editorial) | | the GorobMassiveSulfideProspect, DamaraOrogen,Namibia HORSTH)•USSINGER,* MARTIN OKRUSCH, Mineralogisches...lensesand several smaller sulfide occurrencesat Gorob, Namibia, are hostedby metaturbidites of the Kuise...regionallymetamorphosed at staurolite-kyanite-sillimanite grade.In the stratigraphic footwallof the sulfidelenses...mineralexploration. TheGorobprospect in theNamibdesertof Namibia consists of five smallmetamorphosed, sedimenthostedmassive...ofpremetamorphic alteration. GOROB MASSIVE SULFIDE PROSPECT, NAMIBIA 73 Variousauthors(e.g.,Miller |  | | 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...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 |  | | 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unpublished.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) | | circles). Inset shows location of South West Africa/Namibia. This paper is primarily concerned with those parts...refolded relics. Observations by the writers in the Gorob, Schlesien, Neudamm and Omitara areas {Fig. 4) show...having a generally westward dip is developed in the Gorob area, but becomes progressively more intense from...1979), small-scale examples of which occur south of Gorob {Sawyer, 1978, fig. 5). The sense of thrusting in...over south. The Southern Margin Zone is a wide region characterised by pre-Damaran basement, deformed |  | | Journal (article/letter/editorial) | | (chlorite, biotite, almandine, staurolite, kyanite, sillimanite) occur together, in prograde form, within volumes...chemical sedimentary) features through high (sillimanite) grade regional metamorphism (Stanton and Williams...exclusively to rocks that have undergone the highest (sillimanite) grade of metamorphism, as it is in these that...enclosing quartz–feldspar–muscovite–biotite–garnet–sillimanite gneiss, from the Broken Hill district, New South...quartz–feldspar–muscovite–biotite–staurolite– kyanite–sillimanite rock from the Canadian Abitibi Belt near Hemlo |  | | Journal (article/letter/editorial) | | environments that have undergone high-grade (sillimanite) regional metamorphism. In all cases, chemical...à un degré de métamorphisme régional élevé (sillimanite). Dans tous les cas, l’équilibre chimique n’a...highgrade (sillimanite) regionally metamorphosed terranes of Broken Hill, New South Wales, the Gorob mine in...in Namibia, the Aggeneys district of Namaqualand, and the Hemlo area of Ontario, the evidence indicating...from the possible high-temperature formation of sillimanite from kyanite (Barrow 1893, p. 340), the derivation |  | | Journal (article/letter/editorial) | | boron-bearing phases (e.g., feldspar, muscovite, sillimanite), total sample purity is not required. The 611B...particular, two analyses of a sample from the Ore Knob mine, North Carolina (no. 11119/29), yield 6liB values...Elizabeth mine, Vermont Devonian(?) Amphibolite 1, 2 Cu, Zn, Ag Cu, Zn Elizabeth mine, Vermont Pike...Pike Hill mine, Vermont Devonian(?) Devonian(?) Amphibolite Amphibolite 1, 2 2, 3 Cu, Zn Cu, Zn ... Ely mine, Vermont Ore Knob mine, North Carolina Devonian(?) Late Proterozoic Amphibolite Amphibolite |  | | Journal (article/letter/editorial) | | pressure fields; the remaining two members, sillimanite and andalusite, are also familiar to many collectors...Cr, Fe, Mg, Ca, and K. It is a member of the sillimanite group and is trimorphous (having the same chemical...but a different structure) with andalusite and sillimanite. Kyanite is widely distributed in gneisses and...psuedomorphs of kyanite after andalusite and sillimanite are known from scattered locations. There are...Salinas, Coronel Murta, Minas Gerais, Southeast Region, Brazil. Arkenstone photo. mentions that beautiful |  | | Book | | Republic, 6 cm). Figure 1.2 Halite crystals (Namibia, 5.8 cm). 6 section devoted to the display of...(field of view 8 cm). Figure 1.3 An opencast iron ore mine (Postmasburg, South Africa). 7 microscopes, or...in groups 8–12, show marked deviation. In this region of the Periodic Table, electronegativity increases...bonded substances, the electrons are confined to the region between the nuclei of the bonded atoms and they...Fluorite showing stepped, cubic crystal faces (Erongo, Namibia, 5.8 cm). hence occurs less commonly. Figure | | | Book | | Republic, 6 cm). 6 by Figure 1.2 Halite crystals (Namibia, 5.8 cm). section devoted to the display of such...about identifying a Figure 1.3 An opencast iron ore mine (Postmasburg, South Africa). microscopes, or chemically...in groups 8-12, show marked deviation. In this region of the Periodic Table, electronegativity increases...substances, the electrons are confined to the region between the nuclei of the bonded atoms and they...Fluorite showing stepped, cubic crystal faces (Erongo, Namibia, 5.8 cm). hence occurs less commonly. Figure |  | | Journal (article/letter/editorial) | | minerals include staurolite, kyanite, andalusite, sillimanite, chlorite, muscovite, biotite, and the plagioclase...Colorado. John Betts specimen and photo. mine or Garnet Hill mine), near Southbury, New Haven County, and...crystals to 2 cm have been collected at the Island mine, Alstead, Cheshire County, and similar pegmatitic...place), Oven, and Humphrey mountains, and the Crehore mine on Casey Mountain (Sinkankas 1959). Good almandine...collected from the vicinity of the old Behr garnet mine near Chelsea, Bethel Township, and exceptional trapezohedra |  | | Journal (article/letter/editorial) | | biotite I, Garnet I, staurolite, Andalusite I and sillimanite. Peak metamorphism took place at 600–6208C and...belonging to the M1b metamorphic stage. (g) Sillimanite (Sill), belonging to the M1b metamorphic stage... andalusite (And I; Figure 3c), staurolite, sillimanite, kyanite, biotite (Bt I; Figure 3b), in addition...main deformation D2. Finally, garnet (Grt I) þ sillimanite þ biotite (Bt I) þ muscovite grew close to the...garnet, staurolite, 15 andalusite, kyanite, sillimanite and plagioclase. The relative periods over which |  | | Journal (article/letter/editorial) | | Granite–Migmatite Complex ŽOGMC., Central Damara Orogen, Namibia, consists of grt- and crd-bearing S-type granites...Migmatites; Partial melting; Proterozoic mobile belt; Namibia 1. Introduction Some models for the origin and...area within Central Zone of the Damara orogen, Namibia. Abbreviations in inset: KZ: Kaoko Zone, NP: Northern...kyanite-in, Ž5. cordierite-in, Ž6. andalusite sillimanite, Ž7. sillimanite-in according to staurolite-breakdown...muscoviteq plagioclaseq quartz q H 2 O melt q sillimanite, Ž9. K-feldsparq cordierite-in, Ž10. partial |  | | Journal (article/letter/editorial) | | Early Cambrian orogenesis in the Takab Complex region of northwest Iran marks one of the fundamental...Central Iran (Saghand region), the geodynamic and metamorphic evolution of the Takab region (northwest Iran)...mica-schist, garnet schist, garnet–andalusite (sillimanite or kyanite) schist, garnet–staurolite schist...biotite, garnet, staurolite, andalusite and sillimanite (Saki et al., 2008a; Saki and Moazzen, 2008)... garnet (I), staurolite, andalusite (I) and sillimanite. The decrease of temperature and pressure during |  | JUNG, S., MEZGER, K., MASBERG, P., HOFFER, E., HOERNES, S. (2004) Petrology of an intrusion-related high-grade migmatite: implications for partial melting of metasedimentary rocks and leucosome-forming processes. Journal of Metamorphic Geology, 16 (3) 425-445 doi:10.1111/j.1525-1314.1998.00146.x | Journal (article/letter/editorial) | | high-grade part of the southern Damara orogen, Namibia which is dominated by Al-rich metasedimentary rocks...Migmatites consist of melanosomes with biotite+sillimanite+garnet+cordierite+hercynite and leucosomes are...metasedimentary rocks. Key words: anatexis; migmatite; Namibia; Nd and Sr isotopes; oxygen isotopes; trace elements...occurrence from the Davetsaub area (Damara orogen), Namibia. Field, petrographic and geochemical evidence,...L O G IC A L S E T T IN G The Damara orogen of Namibia is part of the PanAfrican system and is subdivided |  | | Journal (article/letter/editorial) | | a classic collisional orogen: The Damara Belt, Namibia Ben Goscombe, David A. Foster, David Gray, Ben...a classic collisional orogen: The Damara Belt, Namibia, (2017), doi: 10.1016/j.gr.2017.07.006 This is...a classic collisional orogen: The Damara Belt, Namibia PT Ben Goscombe1*, David A. Foster2, David Gray3...1). Consequently, the tectonic evolution of this region is crucial to understanding the RI assembly of...in the South Ugab Zone, collected from Dead Sea mine pit at longitude 014.20247º, latitude -21.78435º |  | Jung, S., Hoernes, S., Masberg, P., Hoffer, E. (1999) The Petrogenesis of Some Migmatites and Granites (Central Damara Orogen, Namibia): Evidence for Disequilibrium Melting, Wall-Rock Contamination and Crystal Fractionation. Journal of Petrology, 40 (8) 1241-1269 doi:10.1093/petroj/40.8.1241 | Journal (article/letter/editorial) | | Migmatites and Granites (Central Damara Orogen, Namibia): Evidence for Disequilibrium Melting, Wall-Rock...Granite–Migmatite Complex (OGMC), central Damara orogen, Namibia, consists of restite-rich, grt- and crdbearing...sjung@mpch-mainz.mpg.de KEY WORDS: granites; migmatites; Namibia; partial melting; Proterozoic mobile belt INTRODUCTION...central zone of the Proterozoic Damara orogen (Namibia) offers a unique opportunity to study these problems...these xenoliths represent restite from the source region or if they simply reflect metasedimentary residues |  | | Journal (article/letter/editorial) | | and Zfeifl, based on the geology of the Solleftea region in Northern Sweden, it may be assumed that the...East Waite and Old Waite Amulet in the Noranda ore region of the Abitibi volcanic belt in Canada, and the...invarying degree in carbonate material ( t h e sillimanite neisses at Broken Hill, the skarn leptites at...aulacogen. The southern part of the aulacogen, in the region of the Mt. Isa fold zone, is probably connected...southern Africa (Roche Pina, Matchless, etc., in Namibia, and Prieska and others in South Africa) ; the |  | ZHENG, Y. C., GU, Lianxing, TANG, Xiaoqian, WU, Changzhi, LI, Chunhai, LIU, Sihai (2011) Geology and Geochemistry of Highly Metamorphosed Footwall Alteration Zones in the Hongtoushan Volcanogenic Massive Sulfide Deposit, Liaoning Province, China. Resource Geology, 61 (2) 113-139 doi:10.1111/j.1751-3928.2011.00154.x | Journal (article/letter/editorial) | | been mined Mine shut down Mine shut down Mine shut down Mine shut down Mine shut down Mine shut down ...characterized by anthophyllite, cordierite, garnet, sillimanite (100 to 380 m thick); and (iv) the rhythmical...Cu grades (2.51 to 3.50 wt%) are distributed at mine levels above 0 m, whereas those with higher Zn grades...(CDT). No granite intrusions have been found in the mine area. There are, however, numerous diabase dikes...that it is continuously distributed in the whole region (Zhang et al., 1984; Fang, 1992; Deng, 1994; Fang |  | | 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 . . . . . . . . . . . . . . . . . . . . . . . |  | | Book | | biotite, almandine, staurolite, kyanite and sillimanite. If we look at rocks other than shales we find...learn. Copper is mined from this large open-pit mine at Bisbee, Arizona, USA. Bisbee is one of the world’s...you are at the right place — the working face of a mine is a noisy dusty scene and tiny specimens only...allowed into a working mine. The collector will usually do best by prospecting the mine dumps or keeping...Herodsfoot mine, chalcocite from mines in the Redruth area and cuprite from the Phoenix mine. Calcite |  | | Book | | systematically present the geology of each country, region and continent on Earth. Each book aims to provide...(Gariep Belt) cropping out in the western borders of Namibia and South Africa. They were split up in the Mesozoic...concerning the tectonic and geodynamic evolution of this region during the Precambrian. Major tectonometamorphic...tectonostratigraphic domains and structures of the region are presented, together with implications for the... They emphasize the enormous potential of this region in terms of base (Cu, Pb, Zn, Co, Ni), precious |  | | Book | | museum quality but many minerals can be found on mine dumps or can be purchased or traded. After introducing...over its beer: to go underground in a non-working mine is sheer folly unless you are accompanied by someone...(preferably several people) who really knows the mine. Before venturing into the field serious collectors...really is a matter of life or death when you are in a mine - only a plan will show where water on the floor...even on you. If you are recovering specimens from a mine (few collectors can or should do this) watch the |  | | Journal (article/letter/editorial) | | zircon population that reflects ages in the source region to the migmatite protolith. Detrital zircon from...insights into the composition and evolution of this region, enabling better correlations with surrounding...totally replaced by yellow pinnite. Fibrolitic sillimanite occurs as lens-shaped aggregates arranged parallel...crystals of green spinel occur associated with sillimanite aggregates (Fig. 3b). The paleosome/melanosome...(Hoskin and Schaltegger, 2003), reflecting the source region for metasediments. Twentyseven grains were analyzed |  | | Book | | ‘Copper Belt’ in Zaire and Zambia; and in Bura-Bura Mine, Australia. Sedimentary copper is found in schists...also found there on 26 January 1905 in the Premier Mine. For several decades these South African diamond...is found in pegmatites (in California, USA, and Namibia), and in some volcanic rocks where it forms part...(Copperbelt Zone), Transvaal, and near Tsumeb, Namibia. Prospective ores may include mineralized sandstones... Riechelsdorf, Bieber and Dillenburg, FRG; Cap Mine, Pennsylvania, USA; and Brompton Lake, Canada. Large |
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