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Alto Ligonha district

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Morrua pegmatite, <b>Alto</b> <b>Ligonha</b> <b>district</b>, Mozambique. ( a ) Backscattered el...
Published: 01 August 2010
F ig . 10. Morrua pegmatite, Alto Ligonha district, Mozambique. ( a ) Backscattered electron image illustrating the important mineral association tantalite-(Mn)-microlite in the pegmatite. ( b ) Chondrite-normalized REE distribution patterns of CGM and gangue minerals from the sodic zone.
Journal Article
Journal: Economic Geology
Published: 01 December 1956
Economic Geology (1956) 51 (8): 757–780.
...Richard W. Hutchinson; R. J. Claus Abstract Columbite, beryl, lepidolite, and other economic minerals are associated with zoned pegmatites discordantly emplaced in Precambrian schists of the Alto Ligonha district, Mozambique. Mineral assemblages and textural features indicate that the pegmatites...
Journal Article
Published: 01 March 2017
South African Journal of Geology (2017) 120 (1): 77–100.
... the Kibara Belt (mainly Rwanda and the DR Congo), around the Kenticha mine (Ethiopia) and in the Alto Ligonha Province (Mozambique). Production from pegmatites and related placer deposits is mostly from hundreds of artisanal and small-scale workings with only a handful of semi-industrial Ta mines...
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Journal Article
Journal: Clay Minerals
Published: 01 December 2008
Clay Minerals (2008) 43 (4): 597–613.
...M. A. Sequeira Braga; C. Leal Gomes; J. Duplay; H. Paquet Abstract Namacotche gem-bearing pegmatites of Alto Ligonha pegmatite district are heterogeneous, strongly fractionated, and have large Li and Ta and extremely large Cs contents. Clay samples were collected in fracture infillings and dilation...
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Journal Article
Published: 01 August 2011
Mineralogical Magazine (2011) 75 (4): 2485–2494.
... signatures in both the Nigerian and the Brazilian samples, and no evidence for evaporites is detected. The samples from the Alto Ligonha pegmatite district in Mozambique show a B isotope signature that is significantly heavier than typical granites and pegmatites ( Fig. 4 ). In previous studies, elevated δ...
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Journal Article
Published: 01 August 2010
Mineralogical Magazine (2010) 74 (4): 691–713.
...F ig . 10. Morrua pegmatite, Alto Ligonha district, Mozambique. ( a ) Backscattered electron image illustrating the important mineral association tantalite-(Mn)-microlite in the pegmatite. ( b ) Chondrite-normalized REE distribution patterns of CGM and gangue minerals from the sodic zone. ...
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Image
Lithium versus boron isotope compositions of Paraíba tourmaline (Cu-bearin...
Published: 01 October 2011
F igure 4 Lithium versus boron isotope compositions of Paraíba tourmaline (Cu-bearing elbaite) from the Batalha mine (Paraíba, Brazil) and Paraíba-type tourmaline from the Mavuco mine (Alto Ligonha pegmatite district, Mozambique) and Nigeria (after Ludwig et al. 2011 ). Each data point
Journal Article
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 235–245.
... ); Salado, La Rioja, Argentina ( Henderson 1933 ); Mangualde, Portugal ( de Jesus 1933 ); 7U7 Ranch and Mt Loma, Arizona ( Hurlbut 1936 ); Varuträsk, Sweden ( Mason 1941 ); Mica Lode and School Section, Colorado ( Wolfe & Heinrich 1947 ); Alto do Ligonha, Mozambique ( Correia Neves & Lopes Nunes...
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Journal Article
Published: 01 December 2013
European Journal of Mineralogy (2013) 25 (6): 967–985.
...-feldspar columbite-tantalite minerals gahnite electron microprobe pegmatite evolution Fig. 1 Location of the Namivo granitic pegmatite in the Alto Ligonha pegmatite area of northern Mozambique. Simplified map after Dias & Wilson (2000) . The Namivo granitic pegmatite intruded...
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Journal Article
Published: 01 February 2011
The Canadian Mineralogist (2011) 49 (1): 301–319.
... analyzed in this study. Yellow to pale yellow and other colors of tourmaline pebbles are mined from alluvial deposits in a small area near Muva in the eastern Alto Ligonha pegmatite district ( Laurs et al. 2008 ). During and after the Pan-African event (0.56–0.80 Ga), granitoid and pegmatitic...
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Journal Article
Published: 01 December 2015
European Journal of Mineralogy (2015) 27 (6): 771–782.
... California, Černý et al ., 2004 ; Namivo, Alto Ligonha, Mozambique, Neiva, 2013 ). Table 3 Average electron-microprobe analyses of some zoned columbite-tantalite crystals (and simpsonite inclusion) from lepidolite-subtype pegmatites (type C) in the Gouveia area, central Portugal. Samples...
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Journal Article
Published: 01 July 2010
American Mineralogist (2010) 95 (7): 921–932.
... this fluid and magnetite leading to hematization ( Rotherham 1997 ). The mineral assemblage is suggestive of low S fugacity and the limited sulfur present was consumed in precipitating pyrite and chalcopyrite ( Rotherham 1997 ). The Muiane pegmatite is located in the Alto Ligonha region of Mozambique...
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Journal Article
Published: 01 November 2015
The Canadian Mineralogist (2015) 53 (6): 991–1013.
...Adriana, Heimann; Jason A., Yonts; Miguel A., Galliski Gahnite from LCT granitic pegmatites of the Comechingones (Blanca Dora, Juan Román, Magdalena, La Ona, and Sin Nombre pegmatites) and Conlara (Nancy pegmatite) pegmatite districts, Argentina, was analyzed to investigate the relationship between...
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Journal Article
Published: 01 October 2020
American Mineralogist (2020) 105 (10): 1589–1592.
... ; Kubernátová and Cempírek 2019 ). Additionally, Pb-bearing tourmalines also have been found in Momeik, Myanmar (up to 1640 ppm Pb; Ertl et al. 2007 ), Eastern Alps, Austria (up to 0.5 wt% PbO 2 ; Ertl et al. 2019 ), Madagascar (up to 0.5 wt% PbO; Lussier et al. 2011 ) and Alto Ligonha area, Mozambique (up...
FIGURES
Journal Article
Journal: Elements
Published: 01 October 2011
Elements (2011) 7 (5): 333–338.
...$25,000/carat for exceptionally clean, intensely colored Brazilian stones. In the 1990s additional deposits were found in Paraíba State and in the neighboring Rio Grande do Norte State ( Shigley et al. 2001 ), and more were discovered later in Nigeria ( Milisenda and Henn 2001 ) and in the Alto Ligonha...
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Journal Article
Published: 01 March 2017
The Canadian Mineralogist (2017) 55 (2): 283–315.
..., Brazil ( e.g ., Beurlen et al . 2014 ); Maine, USA ( e.g ., Simmons et al . 1996 , 2013 ); and Alto Ligonha, Mozambique ( e.g ., Cronwright 2014 ). Most rare-element pegmatites of the Sveconorwegian orogenic belt are spatially not related to granites. In fact, granites that are emplaced within...
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Journal Article
Published: 01 October 2011
The Canadian Mineralogist (2011) 49 (5): 1175–1187.
... (PO 4 ) 2 , a new mineral . Am. Mineral . 37 , 931 – 940 . Neiva A.M.R. Neiva J.M.C. ( 2005 ): Beryl from the granitic pegmatite at Namivo, Alto Ligonha, Mozambique . Neues Jahrb. Mineral., Abh . 181 , 173 – 182 . Novák M. Filip J. ( 2010 ): Unusual (Na, Mg...
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Journal Article
Published: 01 April 2014
American Mineralogist (2014) 99 (4): 811–816.
... Minas Gerais, who was the most active geoscientist in the study of Brazilian pegmatites, especially in the region of Conselheiro Pena and Araçuai, as well as in Alto Ligonha in Mozambique, where he discovered hafnon, the Hf analog of zircon. The type specimen of correianevesite (a part...
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Journal Article
Published: 24 November 2020
The Canadian Mineralogist (2020) 58 (6): 767–783.
...Štěpán Chládek; Pavel Uher; Milan Novák ABSTRACT We studied compositional variations in columbite group minerals (CGM) from several granitic pegmatites of the beryl-columbite subtype in the Maršíkov district, Silesian Domain of the Bohemian Massif, Czech Republic. The CGM are characterized...
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Journal Article
Published: 31 March 2018
The Canadian Mineralogist (2018) 56 (2): 203–220.
... pegmatites may contain abundant microlite relative to other (Nb,Ta,Ti)-oxide minerals, e.g ., Kibara Belt, DRC, and Alto Ligonha province, Mozambique ( Melcher et al . 2015 ); Harding, Taos County, New Mexico ( Lumpkin & Ewing 1992 ); Brown Derby, Gunnison County, Colorado ( Heinrich 1967 ); and Tin...
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