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Grootfontein Namibia

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Journal Article
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 248-255.
...Oleg I. Siidra; Sergey V. Krivovichev; Rick W. Turner; Mike S. Rumsey; John Spratt Abstract The crystal structure of hereroite, a new complex lead oxychloride mineral from the Kombat Mine, Grootfontein, Namibia, has been solved by direct methods and refined to R 1 = 0.054 for 6931 unique observed...
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Journal Article
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 256-261.
...Oleg I. Siidra; Sergey V. Krivovichev; Rick W. Turner; Mike S. Rumsey; John Spratt Abstract The crystal structure of vladkrivovichevite, a new complex lead oxychloride mineral from the Kombat Mine, Grootfontein, Namibia, has been solved by direct methods and refined to R 1 = 0.048 for 3801 unique...
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Journal Article
Published: 01 December 2003
South African Journal of Geology (2003) 106 (4): 281-286.
...J.S. Marsh; R.S. Swart; D. Phillips Abstract A reliable 40 Ar/ 39 Ar plateau age of 180 ± 1.2 Ma (1σ) has been obtained for fresh basalt lava interbedded with aeolian Etjo Formation sandstones south-southwest of Grootfontein in northeast Namibia. This indicates that the Early Jurassic Karoo flood...
FIGURES
Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 637-646.
... in the Grootfontein district, Otjozondjupa region, northern Namibia. The mineral assemblage that contains milanriederite was formed by hydrothermal and metasomatic replacement and fracture-filling of dolostones of the Upper Proterozoic Hüttenberg Formation by polymineralic aggregates consisting of Mn-rich spinels...
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Journal Article
Published: 31 March 2018
The Canadian Mineralogist (2018) 56 (2): 159-165.
...Nikita V. Chukanov; Diana O. Nekrasova; Oleg I. Siidra; Yury S. Polekhovsky; Igor V. Pekov Abstract The new mineral janchevite was discovered in Mn-oxide ore from the Kombat mine, Grootfontein district, Otjozondjupa region, Namibia. Associated minerals are baryte, hausmannite, calcite, magnesite...
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Journal Article
Published: 01 March 2018
European Journal of Mineralogy (2018) 30 (2): 383-391.
..., Grootfontein district, Otjozondjupa region, northern Namibia (WGS 84 coordinates 19° 46′ 60″ S, 18° 1′ 0″ E). Grootfonteinite (Cyrillic: хрутфонтейнит) is named for the locality in the Grootfontein district. The mineral and its name have been approved by the Commission on New Minerals, Nomenclature...
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Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP389.1
EISBN: 9781862396654
...) and the Grootfontein Inlier (GI), forms the southwestern margin of the Congo craton in NW Namibia, which is largely covered by Neoproterozoic rocks of the Pan-African Kaoko and Damara belts (Fig. 1 ). Rocks from these basement complexes indicate their protolith formation during the Eburnean time interval ( c. 2.1...
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Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 619-628.
...Nikita V. Chukanov; Oleg I. Siidra; Yury S. Polekhovsky; Igor V. Pekov; Dmitry A. Varlamov; Vera N. Ermolaeva; Alla A. Virus The new lead oxychloride vanadate mineral erikjonssonite was discovered at the abandoned Kombat copper mine, Grootfontein district, Namibia, in association with hausmannite...
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Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP326.15
EISBN: 9781862395749
..., of special economic interest. This paper concentrates on the Ghaub Formation diamictite interval in northern Namibia and the major environmental change in the aftermath of the assumed glaciation. The relationship of the post-glacial sediments with the underlying different types of cap carbonate...
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Journal Article
Journal: Economic Geology
Published: 01 May 2007
Economic Geology (2007) 102 (3): 441-469.
...Maria Boni; Rosario Terracciano; Noreen J. Evans; Carsten Laukamp; Jens Schneider; Thilo Bechstädt Abstract Zn-Cu-Pb vanadate ores (descloizite, mottramite, and vanadinite) in the Otavi Mountainland, Namibia, once were considered the greatest vanadium deposits in the world, with resources...
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Journal Article
Published: 01 September 2018
South African Journal of Geology (2018) 121 (3): 237-252.
...L. Longridge; J. Kinnaird; R. Gibson; C. Hawkesworth; R. Armstrong Abstract Zircon U-Pb, Hf- and O-isotopic results from granites and basement rocks from the southwestern Central Zone of the Damara Belt (Namibia) are used to decipher the process of remobilization during collision in this Pan...
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Journal Article
Published: 01 September 2010
South African Journal of Geology (2010) 113 (3): 307-334.
... the palaeo systems are shown in Figure 1 . The Etosha Pan is located in the topographically lowest part of the Owambo Basin of northern Namibia near its southern margin (Figure 2 ). Most of the floor of the pan has an elevation of 1080 m or close to it. Nevertheless, the two present perennial river systems...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 2005
AAPG Bulletin (2005) 89 (10): 1293-1318.
...Erwin W. Adams; John P. Grotzinger; Wesley A. Watters; Stefan Schröder; David S. McCormick; Hisham A. Al-Siyabi Abstract The stratigraphic architecture of a terminal Proterozoic carbonate ramp system (ca. 550 Ma, Nama Group, Namibia) was mapped quantitatively with digital surveying technologies...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2011
GSA Bulletin (2011) 123 (7-8): 1448-1477.
...Eugene W. Domack; Paul F. Hoffman Abstract Our detailed examination of the Ghaub Formation (possibly 635 Ma) on the distal foreslope of the Otavi carbonate platform is part of a regional study of the Congo paleocontinental margin in northwestern Namibia. Detrital carbonates of the Ghaub Formation...
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Image
Map showing the distribution of the Etjo Formation between Omaruru and Groo...
Published: 01 December 2003
Figure. 1. Map showing the distribution of the Etjo Formation between Omaruru and Grootfontein in northern Namibia, and their spatial relationship to the Doros-Huab River valley area where thick aeolianites (not shown) underlie and interfinger with the regional Etendeka lavas. The location
Image
(A) North-south stratigraphic cross section and composite carbon isotope re...
Published: 01 July 2011
Figure 1. (A) North-south stratigraphic cross section and composite carbon isotope record of the Otavi Group on the southern and western flanks of the Kamanjab inlier ( Fig. 1B ), Namibia ( Halverson et al., 2005 ). Shaded rectangle on inset map of southern Africa (lower right) gives area of part
Journal Article
Published: 01 October 2011
Mineralogical Magazine (2011) 75 (5): 2549-2561.
...{document} \(\mathrm{Fe}_{3}^{2+}\) \end{document} Zr 3 (Si 26 O 73 OH)Cl 2 Khibiny alkaline massif, Mount Rasvumchorr, Kola Peninsula, Russia [Pb 32 O 18 ][Pb 4 Mn 2 O]Cl 14 (BO 3 ) 8 ·2H 2 O Kombat mine, Kombat, Grootfontein, Namibia Oleg I. Siidra*, Rick W. Turner, Sergey V. Krivovichev...
Journal Article
Published: 01 November 2006
American Mineralogist (2006) 91 (11-12): 1909-1917.
... polymetallic deposit in Central Kazakhstan by Chukhrov (1952) , are consistent with phosphohedyphane. A recent report by Raade (2005) of clear, colorless, zoned, Ca-rich pyromorphite crystals from Berg Aukas, Grootfontein, Namibia, includes chemical analyses consistent with these crystals being...
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Journal Article
Published: 01 October 2018
Mineralogical Magazine (2018) 82 (5): 1225-1232.
... Möckel and Svetlana A. Vozchikova Kombat mine, Grootfontein district, Otjozondjupa region, Namibia Ca 19 Fe 3+ Al 4 (Mg 4 Al 4 )Si 18 O 67 (OH) 11 Milanriederite IMA No. 2018-041 NO OTHER INFORMATION WILL BE RELEASED BY THE COMMISSION It is still a requirement...
Journal Article
Published: 01 September 2018
European Journal of Mineralogy (2018) 30 (5): 1037-1043.
... to mineralogists working on new species. Each mineral is described in the following format: Milanriederite Ca 19 Fe 3+ Al 4 (Mg 4 Al 4 )Si 18 O 67 (OH) 11 Kombat mine, Grootfontein district, Otjozondjupa region, Namibia Nikita V. Chukanov*, Taras L. Panikorovskii, Alexey G. Goncharov, Igor V. Pekov...