 | | Journal (article/letter/editorial) | | PYROCHLORE-GROUP MINERALS FROM THE LUESHE AND ARAXÁ (BARREIRO) CARBONATITES BY 57Fe MÖSSBAUER SPECTROSCOPY...Lueshe in the Democratic Republic of Congo, and Araxá in Brazil. In contrast to the common assumption that...O2– and 1 OH–, whereas in bariopyrochlore from Araxá, the unusually large value of the quadrupole splitting...Republic of Congo, and the Barreiro carbonatitic complex at Araxá, in Brazil, using 57Fe Mössbauer spectroscopy...bariopyrochlore with BaO up to 19% (Mariano et al. 1997) from Araxá was used for the present investigation. All samples |  | Falci, André, Caxito, Fabrício de Andrade, Seer, Hildor José, Valeriano, Cláudio de Morisson, Dias, Paulo Henrique Amorim, Pedrosa-Soares, Antônio Carlos (2018) Provenance shift from a continental margin to a syn-orogenic basin in the Neoproterozoic Araxá nappe system, southern Brasília belt, Brazil. Precambrian Research, 306. 209-219 doi:10.1016/j.precamres.2018.01.004 | Journal (article/letter/editorial) | | basin in the Neoproterozoic Araxá nappe system, southern Brasília belt, Brazil André Falci, Fabrício de...basin in the Neoproterozoic Araxá nappe system, southern Brasília belt, Brazil, Precambrian Research (2018)...basin in the Neoproterozoic Araxá nappe system, southern Brasília belt, Brazil André Falci1, Fabrício de...Instituto de Geociências, Universidade Federal de Minas Gerais (CPMTC-IGC-UFMG), Campus Pampulha, Av. Antônio...MG, Brazil 2 - Centro Federal de Educação Tecnológica de Minas Gerais - CEFET-MG, Unidade Araxá, Av. |  | | Journal (article/letter/editorial) | | assemblage from Neoproterozoic mélange, Central Brazil Matthew T. Brown, Reinhardt A. Fuck, Elton L. Dantas...assemblage from Neoproterozoic mélange, Central Brazil, Precambrian Research (2019), doi: https://doi...assemblage from Neoproterozoic mélange, Central Brazil Matthew T. Browna*, Reinhardt A. Fucka, Elton L...Brasília, Brasília, Federal District, 70910-900, Brazil *Corresponding author. E-mail address: brownmt7@gmail...Abstract The Neoproterozoic Brasília belt, central Brazil, formed during the amalgamation of West Gondwana |  | Gomes, Celso de Barros, Comin-Chiaramonti, Piero, Azzone, Rogério Guitarrari, Ruberti, Excelso, Rojas, Gaston Eduardo Enrich (2018) Cretaceous carbonatites of the southeastern Brazilian Platform: a review. Brazilian Journal of Geology, 48 (2) 317-345 doi:10.1590/2317-4889201820170123 | Journal (article/letter/editorial) | | Universidade de São Paulo – USP, São Paulo (SP), Brazil. E-mails: cgomes@usp.br, rgazzone@usp.br, exrubert@usp...carbonatite occurrences of different regions of Brazil, Paraguay and Bolivia. Locality Occurrence Petrography...Petrography Mineralogy Age References BRAZIL Ribeira Valley 1 Barra do Itapirapuã Dike, vein, breccia..., Flo, Op (Hm, Il), Ch n.d. 75, 76 15 Araxá (Barreiro) Stock, dike Mg-ca, Ca-ca, Fe-ca Gl, Py,...Toniolo et al. (2013); 76, Monteiro et al. (2016); Araxá: 77, Issa Filho et al. (1984); 78, Traversa et al |  | | Journal (article/letter/editorial) | | % from tin slag refining and 10 % from secondary mine concentrates. Due to rapid industrialisation and...Weathered crusts overlying carbonatite complexes in Brazil and one hard rock carbonatite deposit in Canada...Canada account for about 92 and 7 % of Nb world mine production, respectively. Since the bulk of the production...the start-up time for new operations. The Kenticha mine (Ethiopia) is a past producer that may re-enter...studies on new developments) are required in any mine as price levels vary for each deposit and are dependent |  | | Report (issue) | | ............................................M24 Mine Waste Characteristics ........................................................................M27 Mine Closure ..........................................subsurface geology of the Saint-Honoré carbonatite complex in southern Quebec, Canada, and a schematic north-south...chart showing niobium resources and reserves in Brazil, Canada, and the United States................................M21 M13. Bar charts showing global mine production of niobium and tantalum, from 2000 to |  | Nascimento, Marisa, Lemos, Flávio, Guimarães, Rogério, Sousa, Clóvis, Soares, Paulo (2019) Modeling of REE and Fe Extraction from a Concentrate from Araxá (Brazil) Minerals, 9 (7) 451 doi:10.3390/min9070451 | Journal (article/letter/editorial) | | REE and Fe Extraction from a Concentrate from Araxá (Brazil) Marisa Nascimento 1, *, Flávio Lemos 1 , Rogério...21941-908, Brazil Companhia Brasileira de Metalurgia e Mineração—CBMM, Araxá 38183-903, Brazil Correspondence:...(REE) concentrate obtained from the ore from Araxá (MG-Brazil). The most important process variables have...development of an efficient hydrometallurgical route. Brazil has the second largest reserve of rare earths in...in the world, with 22 million tons [1], and the Araxá-MG deposit is one of REE’s main assets worldwide |  | | Journal (article/letter/editorial) | | Southern Part of the Proterozoic Vazante Group, Brazil: Implications for Exploration of Sedimentary-Hosted...Southern Part of the Proterozoic Vazante Group, Brazil: Implications for Exploration of Sedimentary-Hosted...SOUTHERN PART OF THE PROTEROZOIC VAZANTE GROUP, BRAZIL: IMPLICATIONS FOR EXPLORATION OF SEDIMENTARY-HOSTED...throughout the evolution of the sedimentary basins. In Brazil, the main zinc deposits are hosted in the Proterozoic...sulfide deposits are the only active Pb-Zn mines in Brazil, operated by Votorantim Metais S.A. http://www |  | | Journal (article/letter/editorial) | | granitic magmatism in the Brasilia Belt, Central Brazil: regional implications of new SHRIMP U–Pb and Sm–Nd...Universidade de Brası́lia, Brası́lia DF 70910-900, Brazil Research School of Earth Sciences, The Australian...accepted 7 March 2003 Abstract New SHRIMP U–Pb zircon ages combined with Sm–Nd isotopic characteristics...associated granitic rocks of the Anápolis–Itauçu Complex in the central-southern part of the Brası́lia Belt...in zircon grains of orthogranulite and granites vary between 760 and 650 Ma. Growth of new zircon at |  | Uhlein, Gabriel J., Uhlein, Alexandre, Stevenson, Ross, Halverson, Galen P., Caxito, Fabrício A., Cox, Grant M. (2017) Early to late Ediacaran conglomeratic wedges from a complete foreland basin cycle in the southwest São Francisco Craton, Bambuí Group, Brazil. Precambrian Research, 299. 101-116 doi:10.1016/j.precamres.2017.07.020 | Journal (article/letter/editorial) | | The Southwest São Francisco Craton, Bambuí Group, Brazil Gabriel J. Uhlein, Alexandre Uhlein, Ross Stevenson...The Southwest São Francisco Craton, Bambuí Group, Brazil, Precambrian Research (2017), doi: http://dx.doi...THE SOUTHWEST SÃO FRANCISCO CRATON, BAMBUÍ GROUP, BRAZIL Gabriel J. Uhlein1,2; Alexandre Uhlein1; Ross...de Minas Gerais, Campus Pampulha, Av. Antônio Carlos 6627, 31270-901, Belo Horizonte, MG, Brazil - *corresponding...that the Ediacaran Bambuí Group in east-central Brazil was deposited in a foreland basin. The Samburá |  | Wang, Zhen-Yu, Fan, Hong-Rui, Zhou, Lingli, Yang, Kui-Feng, She, Hai-Dong (2020) Carbonatite-Related REE Deposits: An Overview. Minerals, 10 (11) 965 doi:10.3390/min10110965 | Journal (article/letter/editorial) | | to China, along with a minor contribution from Brazil, Australia, the United States, Canada, India [7...(REE) HREE-enriched deposits in southern China Araxá Catalão (REE) Mrro do Ferro (Th-REE) Mount Weld...(REE) Igneous carbonatite Carbonatite China Brazil Brazil Australia United States Russia Russia India...REE deposit, which is hosted in the Ilímaussaq complex of southern Greenland, is a typical example [14...the whole rock The types of REE deposits are complex and diverse, and the ones related to carbonatite–alkaline |  | Oliver, Nicholas H.S., Thomson, Brian, Freitas-Silva, Flavio H., Holcombe, Rodney J., Rusk, Brian, Almeida, Bruna S., Faure, Kevin, Davidson, Garry R., Esper, Eldrick L., Guimarães, Paulo J., Dardenne, Marcel A. (2015) Local and Regional Mass Transfer During Thrusting, Veining, and Boudinage in the Genesis of the Giant Shale-Hosted Paracatu Gold Deposit, Minas Gerais, Brazil. Economic Geology, 110 (7) 1803-1834 doi:10.2113/econgeo.110.7.1803 | Journal (article/letter/editorial) | | Giant Shale-Hosted Paracatu Gold Deposit, Minas Gerais, Brazil* Nicholas H.S. Oliver,1,2,† Brian Thomson...Andar, Cruzeiro, Belo Horizonte – MG 30130-009, Brazil 4 Instituto 5 School de Geociências, Universidade...Universidade de Brasília, Brasília DF, 70910-900, Brazil of Earth Sciences, University of Queensland, St Lucia...understand the genesis of the Paracatu deposit in Brazil, a shallow-dipping, bulk-tonnage, vein-style low-grade...of large veins locally preserve preboudinage, complex internal vein textures, including sulfide-rich |  | | Book | | Alkmim Editors São Francisco Craton, Eastern Brazil Tectonic Genealogy of a Miniature Continent Regional...Alkmim • Editors São Francisco Craton, Eastern Brazil Tectonic Genealogy of a Miniature Continent 123...Janeiro Maracanã, Rio de Janeiro Brazil Fernando F. Alkmim Escola de Minas Universidade Federal de Ouro...Preto Ouro Preto Brazil Umberto G. Cordani Universidade de São Paulo São Paulo Brazil ISSN 2364-6438...significant contributor to the mining industry in Brazil. This book provides a state of knowledge overview |  | | Journal (article/letter/editorial) | | Neoproterozoic Brasília Belt and Tocantins Province, central Brazil Luiz J.H. D’el-Rey Silva ⁎, Marcos A.R. de Vasconcelos...Ribeiro, Asa Norte, CEP 70910-900, Brasília-DF, Brazil Received 5 May 2007; received in revised form 11...Neoproterozoic Brasília Belt (Tocantins Province, central Brazil) in contact with a lower-grade footwall (External...Underthrusting; Brasília Belt; Tocantins Province; Brazil 1. Introduction Regional-scale faults and shear...evolution of the Tocantins Province in central Brazil. 1342-937X/$ - see front matter © 2007 International |  | | Report (issue) | | gov/images/periodictable.pdf. Cover. The Mountain Pass Mine, San Bernardino County, California, was the only...............................................O21 Mine Waste Characteristics.........................................................................O22 Mine Closure...........................................Figures O1. O2. O3. O4. O5. Graph showing world mine production of rare-earth oxides, by country and................O6 Photograph of the Mountain Pass Mine in San Bernardino County, California, which was |  | | Journal (article/letter/editorial) | | youngest parts of a carbonatite-alkaline rock complex that formed during fractional crystallization of...Country Mine production 2014 (Mt) 2015 (Mt) Reserves (Mt) Igneous phosphorites Brazil Russia South...phosphate rock is the Devonian Khibina Alkaline Complex in Russia’s Kola Peninsula (Fig. 2), with seven...rock production. Igneous phosphate deposits in Brazil, most associated with Cretaceous alkaline carbonatite...2016). Although the Paleoproterozoic Phalabora Complex in South Africa only produced 2.20 Mt (10%) in |  | | Journal (article/letter/editorial) | | there are only three operating Nbmines [Araxá and Catalão-II (Brazil) and St. Honoré (Canada)]. All produce...the primary sources. The Brazilian deposits at Araxá, Catalão-I and II, and Seis Lagos are examples of...only operating Nb mine in under-saturated peralkaline syenites is the Karnasurt mine (Kremenetsky et al...Pekov, 2000) in the lujavrites of the Lovozero complex from which a concentrate with about 8 wt.% Nb2O5...Nb, due to the penchant for the element to form complex anions (NbO34 −; NbO76 −; Nb2O26 −) which cannot |  | Coelho, Mariana Barroso, Trouw, Rudolph Allard Johannes, Ganade, Carlos E., Vinagre, Rodrigo, Mendes, Júlio Cezar, Sato, Kei (2017) Constraining timing and P-T conditions of continental collision and late overprinting in the Southern Brasília Orogen (SE-Brazil): U-Pb zircon ages and geothermobarometry of the Andrelândia Nappe System. Precambrian Research, 292. 194-215 doi:10.1016/j.precamres.2017.02.001 | Journal (article/letter/editorial) | | overprinting in the Southern Brasília Orogen (SE-Brazil): U-Pb zircon ages and geothermobarometry of the Andrelândia...overprinting in the Southern Brasília Orogen (SE-Brazil): U-Pb zircon ages and geothermobarometry of the Andrelândia...overprinting in the Southern Brasília Orogen (SE-Brazil): U-Pb zircon ages and geothermobarometry of the Andrelândia...Rio de Janeiro, Brazil 2. Serviço Geológico do Brasil – SBG/CPRM, Rio de Janeiro, Brazil 3. Universidade...Universidade de São Paulo – USP, São Paulo, Brazil ABSTRACT The Andrelândia Nappe System (ANS) is an important |  | | Journal (article/letter/editorial) | | the Campos Gerais Domain — A reworked margin of the São Francisco paleocontinent (SE Brazil): Constraints...Geological Survey of Brazil – CPRM, Av Brazil 1731, Belo Horizonte 30140-002, Brazil Department of Mineral...orogeny a b s t r a c t The Campos Gerais Domain (CGD) in southeastern Brazil is an approximately 180 km ...metavolcano-sedimentary rocks of the Fortaleza de Minas and Alpinópolis segments represent a Mesoarchean...diorite (TTG) gneisses and migmatites. U-Pb SHRIMP zircon data from a subalkaline metagabbro yielded a concordia |  | Marimon, Rodrigo S., Trouw, Rudolph A.J., Dantas, Elton L., Ribeiro, André, Santos, Priscila, Kuster, Klaus, Vinagre, Rodrigo (2021) Provenance of passive-margin and syn-collisional units: Implications for the geodynamic evolution of the Southern Brasília Orogen, West Gondwana. Sedimentary Geology, 413. 105823pp. doi:10.1016/j.sedgeo.2020.105823 | Journal (article/letter/editorial) | | RJ, Brazil of c Universidade de Brasília, Instituto de Geociências, Brasília, DF, Brazil Mineral...the active margin (Paranapanema paleocontinent). Zircon (UPb and Lu-Hf) and whole-rock (Sm-Nd and geochemistry)...samples were collected. Despite the conspicuous zircon age differences, the maximum depositional age is...orogens are, arguably, the most conspicuous and complex geological ur features of Earth. They record...In this contribution we present novel detrital zircon data for passive-margin-related (São Francisco |  | Morbidelli, L., Gomes, C. B., Beccaluva, L., Brotzu, P., Garbarino, C., Riffel, B. F., Ruberti, E., Traversa, G. (1997) Parental Magma Characterization of Salitre Cumulate Rocks (Alto Paranaíba Alkaline Province, Brazil) as Inferred from Mineralogical, Petrographic, and Geochemical Data. International Geology Review, 39 (8) 723-743 doi:10.1080/00206819709465298 | Journal (article/letter/editorial) | | Cumulate Rocks (Alto Paranaíba Alkaline Province, Brazil) as Inferred from Mineralogical, Petrographic,...562, Cidade Universitária, São Paulo, 05508-900, Brazil c Istituto di Mineralogia , Università di Ferrara...Metalurgia e Mineração , Caixa Postal 8, Araxá, 38180, Brazil g Instituto de Geociências , Universidade...562, Cidade Universitária, São Paulo, 05508-900, Brazil h Dipartimento di Scienze della Terra , Università...Cumulate Rocks (Alto Paranaíba Alkaline Province, Brazil) as Inferred from Mineralogical, Petrographic, |  | | Journal (article/letter/editorial) | | layered complex: Meso- (1.25 Ga) and Neoproterozoic (0.79 Ga) extensional events in central Brazil Márcio...Universidade de Brası́lia, Brası́lia-DF 70910-900, Brazil Research School of Earth Sciences, Australian National...Abstract The Niquelândia mafic–ultramafic layered complex, in the central part of the Brası́lia Belt, is...results indicate that the eastern part of the complex (Lower Series) is a Neoproterozoic (797 ± 10 Ma)...sialic material (εNd (T) of −5.8, and inherited zircon grains with ages between ca. 1.0 and 1.9 Ga). The |  | Bertoni, Maria E., Rooney, Alan D., Selby, David, Alkmim, Fernando F., Le Heron, Daniel P. (2014) Neoproterozoic Re–Os systematics of organic-rich rocks in the São Francisco Basin, Brazil and implications for hydrocarbon exploration. Precambrian Research, 255. 355-366 doi:10.1016/j.precamres.2014.10.010 | Journal (article/letter/editorial) | | organic-rich rocks in the São Francisco Basin, Brazil and implications for hydrocarbon exploration Maria...02138, USA d Departamento de Geologia, Escola de Minas, Universidade Federal de Ouro Preto, Morro do Cruzeiro...Cruzeiro, 35.400.000 Ouro Preto, MG, Brazil b a r t i c l e i n f o Article history: Received 22 November...Paracatu Slate Formation of the Canastra Group, Brazil, yields a depositional age of 1002 ± 45 Ma. This...agreement with a previously published U–Pb detrital zircon age (Rodrigues et al., 2010). Together with TOC |  | | Journal (article/letter/editorial) | | ALKALINE MAFIC-ULTRAMAFIC MASSIF, SOUTHEASTERN BRAZIL: INDICATION OF AN ENRICHED MANTLE SOURCE Rogério...Paulo, Rua do Lago, 562 - 05508-080 São Paulo, Brazil Abstract Zirconium- and Ba-rich minerals are found...alkaline mafic-ultramafic massif in southeastern Brazil. The unusual mineralogical assemblage includes...biotite, mantle enrichment, Ponte Nova alkaline complex, Brazil. Sommaire Nous documentons les attributs des...mafic-ultramafic massif (22°47’ S, 45°45’ W), in southeastern Brazil, displays zirconolite, baddeleyite and Ba-rich |  | | Journal (article/letter/editorial) | | geological work at the Alnö Island alkaline-carbonatite complex in 1889. The history of carbonatite research up...(fenitisationtype metasomatism), and alkaline-carbonatite complex morphology to the exploration geologist, (iii)...studies. We use the term alkaline-carbonatite complex to denote occurrences where magmatic and or carbohydrothermal...hosted by a carbonatite or alkaline-carbonatite complex, be situated at the contact between the intrusion...reported at the St.-Honoré alkaline-carbonatite complex (Canada) by Kamenetsky et al. (2015), further supporting |
|
