1-20 OF 272 RESULTS FOR

Belo Horizonte Brazil

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 April 2015
Mineralogical Magazine (2015) 79 (2): 269–283.
...; Luiz C. A. de Oliveira; José D. Ardisson Abstract Almeidaite (IMA 2013-020), ideally Pb(Mn,Y)Zn 2 (Ti,Fe 3+ ) 18 O 36 (O,OH) 2 , from Novo Horizonte, Bahia, Brazil, occurs in association with quartz, rutile, anatase, hematite, kaolinite, muscovite, xenotime-(Y) and bastnaesite-(La). Almeidaite forms...
FIGURES | View All (9)
Journal Article
Published: 01 July 2020
American Mineralogist (2020) 105 (7): 1051–1059.
... to parallelepipeds of about 3 × 3 × 3 mm 3 . Gamma irradiations were performed using a panoramic 60 Co source (CDTN, Belo Horizonte, Brazil) with a flux of 15 kGy/h and total doses ranging from 10 to 1000 kGy. Electron irradiations under water cooling were performed with a linear Van de Graaff accelerator...
FIGURES | View All (6)
Journal Article
Journal: Economic Geology
Published: 01 May 2022
Economic Geology (2022) 117 (3): 719–729.
...., 2019 ; Lehmann et al., 2020 ; Moscati and Neymark, 2020 ; Denholm et al., 2021 ). About 85% of the present-day global Sn production comes from only two regions ( Lehmann, 2020 ): Southeast Asia (Indonesia, South China, and Myanmar) and South America (Peru, Bolivia, and Brazil). In Brazil, 95...
FIGURES | View All (9)
Series: Reviews in Economic Geology
Published: 01 January 2008
DOI: 10.5382/Rev.15.10
EISBN: 9781629490229
...Abstract Abstract The Carajás iron ore deposits located in the southern part of the state of Pará in Brazil were discovered in 1967 and have produced about 70 million metric tons (Mt) of iron ore annually. The deposits are hosted by the Neoarchean metavolcano-sedimentary sequence of the Grão...
FIGURES | View All (14)
Journal Article
Published: 01 February 2018
Mineralogical Magazine (2018) 82 (1): 133–144.
...: 3.42, Pr: 3.79, O: 38.88 An additional sample was measured at the Instituto de Geociências, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil. Chemical analyses (7) were carried out using a Jeol JXA8900R electron microprobe (WDS mode, 15 kV, 20 and beam diameter 5 µm...
FIGURES | View All (7)
Journal Article
Published: 01 April 2014
American Mineralogist (2014) 99 (4): 811–816.
... 2+ Mn 2 2+ (PO 4 ) 2 ·3H 2 O, is a new reddingite-group mineral approved by the CNMNC (IMA 2013-007). It occurs in a phosphate-rich granite pegmatite that outcrops near the Cigana mine, Conselheiro Pena, Rio Doce valley, Minas Gerais, Brazil. Associated minerals are: triphylite, lithiophilite...
FIGURES | View All (7)
Journal Article
Journal: Clay Minerals
Published: 01 March 2012
Clay Minerals (2012) 47 (1): 69–79.
...A. C. Silva; M. C. Pereira; L. C. A. Oliveira; L. C. D. Cavalcante; J. D. Fabris; E. Murad Abstract Magnetite-rich waste from a niobium mine near Araxá, State of Minas Gerais, Brazil, was heated to 500°C and 1000°C under an O 2 atmosphere. The original waste and its oxidized products were...
FIGURES | View All (8)
Series: Reviews in Economic Geology
Published: 01 January 2008
DOI: 10.5382/Rev.15.09
EISBN: 9781629490229
... Quadrangle (Quadrilátero Ferrífero) was coined by Dorr ( 1969 ) and his coworkers to name the quadrangle map south of the city of Belo Horizonte, in the state of Minas Gerais, southeastern Brazil, roughly between 19°–20° S latitude and 43°–44° W longitude encompassing about 15,000 km 2 , mapped from 1952...
FIGURES | View All (21)
Journal Article
Published: 01 October 2000
American Mineralogist (2000) 85 (10): 1503–1507.
... LiFeAl 3692 OH1 AlFeFe 3564 OH1 AlFeFe 3594 OH3 AlAlLi 3496 OH3 LiFeAl 3558 OH3 AlAlR 3492 OH3 AlAlAl Schorl 3633 OH1 FeFeFe 3553 OH3 AlAlR Different populations of granitic pegmatites have been defined in the northeastern part of Minas Gerais State, Brazil...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP466.8
EISBN: 9781786203786
... geographical areas: the Iron Quadrangle area, the Espinhaço mountain range and the Lagoa Santa area in south-central Brazil ( Fig. 2 ). The sample contains two different rock types. A total of 322 caves are in Proterozoic limestone of the Sete Lagoas Formation, Bambuí Group in the karst area of Lagoa Santa...
FIGURES | View All (6)
Journal Article
Published: 19 April 2021
Mineralogical Magazine (2021) 85 (3): 332–347.
... , 8 , 257 – 261 . Pedrosa-Soares A.C. , Chaves M.L.S.C. and Scholz R. ( 2009 ) Field Trip Guide . Pp 1 – 28 in: International Symposium on Granitic Pegmatites . PEG2009, Belo Horizonte , Brazil , August 2009. Pedrosa-Soares A.C. et al. ( 2011 ) Late...
FIGURES | View All (20)
Series: Reviews in Economic Geology
Published: 01 January 2008
DOI: 10.5382/Rev.15.04
EISBN: 9781629490229
...Abstract Abstract Hydrothermal alteration in structurally controlled, high-grade banded iron formation (BIF)-related iron deposits at Carajás (Brazil), Hamersley (Australia), and Thabazimbi and the Zeekoebaart prospect (South Africa) exhibit significant similarities and differences in geologic...
FIGURES | View All (11)
Series: Geological Society, London, Special Publications
Published: 01 January 2011
DOI: 10.1144/SP350.3
EISBN: 9781862395985
...Abstract Abstract The Araçuaí orogen extends from the eastern edge of the São Francisco craton to the Atlantic margin, in southeastern Brazil. Orogenic igneous rocks, formed from c. 630 to c. 480 Ma, cover one third of this huge area, building up the Eastern Brazilian Pegmatite Province...
FIGURES | View All (13)
Journal Article
Journal: Economic Geology
Published: 01 June 2021
Economic Geology (2021) 116 (4): 937–962.
... the São Francisco craton is made up of 3.6 Ga gneisses ( Oliveira et al., 2020 ), and cratonization took place in the course of several TTG magmatic events mainly between 3.2 to 2.7 Ga ( Lana et al., 2013 ). The Belo Horizonte Complex was formed initially via magmatic addition of juvenile felsic rocks...
FIGURES | View All (17)
Journal Article
Published: 01 February 2015
American Mineralogist (2015) 100 (2-3): 442–446.
...Luiz A.D. Menezes Filho; Daniel Atencio; Marcelo B. Andrade; Robert T. Downs; Mário L.S.C. Chaves; Antônio W. Romano; Ricardo Scholz; Aba I.C. Persiano Abstract Pauloabibite (IMA 2012-090), trigonal NaNbO 3 , occurs in the Jacupiranga carbonatite, in Cajati County, São Paulo State, Brazil...
FIGURES
Journal Article
Published: 01 April 2014
American Mineralogist (2014) 99 (4): 607–611.
... using a JEOL JXA8900R electron microprobe housed in the Physics Department of the Federal University of Minas Gerais, Belo Horizonte (WDS mode, 15 kV, 20 nA, ca. 5 μm beam diameter). CO 2 was not analyzed because bands for CO 3 2− anions are absent in the IR spectrum. Contents of Mg, Al, and Mn...
FIGURES | View All (4)
Journal Article