 | | 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 |  | 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 |  | 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) | | 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 |  | | Journal (article/letter/editorial) | | grained and intimately intergrown with hematite, goethite and minerals of the crandallite group. The different...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 |  | | 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 |  | 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 |  | Giovannini, Arthur L., Bastos Neto, Artur C., Porto, Claudio G., Pereira, Vitor P., Takehara, Lucy, Barbanson, Luc, Bastos, Pedro H.S. (2017) Mineralogy and geochemistry of laterites from the Morro dos Seis Lagos Nb (Ti, REE) deposit (Amazonas, Brazil) Ore Geology Reviews, 88. 461-480 doi:10.1016/j.oregeorev.2017.05.008 | Journal (article/letter/editorial) | | dos Seis Lagos Nb (Ti, REE) Deposit (Amazonas, Brazil). Arthur L. Giovannini, Artur C. Bastos Neto, Claudio...dos Seis Lagos Nb (Ti, REE) Deposit (Amazonas, Brazil)., Ore Geology Reviews (2017), doi: http://dx.doi...dos Seis Lagos Nb (Ti, REE) Deposit (Amazonas, Brazil). Arthur L. GIOVANNINI1, Artur C. BASTOS NETO2...laterite. All the laterites are composed mainly of goethite (predominant in the lower and upper varieties)...formed from goethite dehydroxylation). The upper laterites were reworked, resulting in goethite formation |  | Melgarejo, Joan C., Costanzo, Alessandra, Bambi, Aurora C.J.M., Gonçalves, Antonio O., Neto, Andrés B. (2012) Subsolidus processes as a key factor on the distribution of Nb species in plutonic carbonatites: The Tchivira case, Angola. Lithos, 152. 187-201 doi:10.1016/j.lithos.2012.06.024 | Journal (article/letter/editorial) | | pyrochlore crystals by goethite, as well as the occurrence of Nb-rich goethite and Fe–Mn oxyhydroxides...187–201 Fig. 1. Geological map of the Tchivira complex. J.C. Melgarejo et al. / Lithos 152 (2012) 187–201...economic point of view: the Seis Lagos deposit in Brazil, the largest Nb deposit in the world, has reserves...superposition of two or more of these processes produces complex mineral successions. The different types of alteration...Ma) riftogenic domain. 4. The Tchivira Complex The Tchivira Complex is a ring structure more than 12 km |  | | Journal (article/letter/editorial) | | ORES OF THE KOMATIITE-HOSTED FORTALEZA DE MINAS DEPOSIT, BRAZIL: EVIDENCE OF HYDROTHERMAL REMOBILIZATION...Rio Claro, São Paulo, 13506-900, Brazil Abstract The Fortaleza de Minas Ni–Cu–PGE sulfide deposit is hosted...southwestern margin of the São Francisco craton, Minas Gerais state, Brazil. The deposit contains 6 million tonnes...komatiite, nickel sulfide deposit, Fortaleza de Minas, Brazil. Sommaire Le gisement de sulfures de Ni–Cu–EGP...Fortaleza de Minas est situé en bordure sud–ouest du craton de São Francisco, dans l’état de Minas Gerais, au |  | Giovannini, Arthur L., Mitchell, Roger H., Bastos Neto, Artur C., Moura, Candido A.V., Pereira, Vitor P., Porto, Claudio G. (2020) Mineralogy and geochemistry of the Morro dos Seis Lagos siderite carbonatite, Amazonas, Brazil. Lithos, 360. 105433 doi:10.1016/j.lithos.2020.105433 | Journal (article/letter/editorial) | | dos Seis Lagos siderite carbonatite, Amazonas, Brazil Arthur L. Giovannini a,⁎, Roger H. Mitchell b,...Bento Gonçalves 9500, Porto Alegre 91501-970, RS, Brazil Department of Geology, Lakehead University, 955...Avenida Victor Barreto 2288, Canoas 92010-000, RS, Brazil d Instituto de Geociências, Universidade Federal...Federal do Pará, Rua Augusto Corrêa 1, Belém, PA, Brazil e Instituto de Geociências, Universidade Federal...Bento Gonçalves 9500, Porto Alegre 91501-970, RS, Brazil f Companhia de Pesquisa de Recursos Minerais CPRM |  | Kim, Rina, Cho, Heechan, Jeong, Jinan, Kim, Jihye, Lee, Sugyeong, Chung, Kyeong Woo, Yoon, Ho-Sung, Kim, Chul-Joo (2020) Effect of Sulfuric Acid Baking and Caustic Digestion on Enhancing the Recovery of Rare Earth Elements from a Refractory Ore. Minerals, 10 (6) 532 doi:10.3390/min10060532 | Journal (article/letter/editorial) | | processes. The studied lateritic ore contained goethite (FeOOH) as a major constituent with REEs scattered...minerals contained within an ore vary depending on the mine; therefore, different processing methods need to...conducted. In Brazil, Neumann and Medeiros [21] tried to separate the REE minerals from Araxá REE ore by...decided to omit physical separation due to the complex mineralogy, fine REE crystals and particles having...intergrowth with the gangue mineral. In a pilot plant, Araxá REE ore was introduced into direct leaching after |  | Matiolo, Elves, Couto, Hudson Jean Bianquini, de Lira Teixeira, Michelle Fernanda, de Almeida, Renata Nigri, de Freitas, Amanda Soares (2019) A Comparative Study of Different Columns Sizes for Ultrafine Apatite Flotation. Minerals, 9 (7) 391 doi:10.3390/min9070391 | Journal (article/letter/editorial) | | Mineral (CETEM/MCTI), Rio de Janeiro 21941-908, Brazil Copebras—China Molybdenum Company Ltd (CMOC International...International Brasil), Ouvidor (GO) 75715-000, Brazil Centro de Tecnologia Mineral (CETEM/MCTIC), Universidade...Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil Correspondence: ematiolo@cetem.gov.br; Tel.: +55-21-38657334...material with particle sizes <44 µm in Brazil was in the Araxá plant concentrator in the beginning of...industrial plant located in Catalão (Goiás state, Brazil), considering a circuit with rougher/cleaner configuration |  | Sharygin, Victor V., Doroshkevich, Anna G., Seryotkin, Yurii V., Karmanov, Nikolai S., Belogub, Elena V., Moroz, Tatyana N., Nigmatulina, Elena N., Yelisseyev, Alexander P., Vedenyapin, Vitalii N., Kupriyanov, Igor N. (2020) Rippite, K2(Nb,Ti)2(Si4O12)O(O,F), a New K-Nb-Cyclosilicate from Chuktukon Carbonatite Massif, Chadobets Upland, Krasnoyarsk Territory, Russia. Minerals, 10 (12) 1102 doi:10.3390/min10121102 | Journal (article/letter/editorial) | | olekminskite, K-feldspar, Fe-Mn–dolomite and quartz. Goethite, francolite (Sr-rich carbonate–fluorapatite) and...for the Chuktukon Massif The Chadobets alkaline complex is located within the Chadobets upland (basin of...The Chadobets alkaline ultramafic carbonatite complex is conventionally subdivided into the Chuktukon...the Chadobets alkaline ultramafic carbonatite complex was described by Kirichenko et al. [36]. The sequence...carbonate-fluorapatite with up to 7 wt % SrO), “goethite” (goethite + “hydrogoethite” ± other Fe-oxides/hydroxides) |  | | Journal (article/letter/editorial) | | 21941-916, Brazil Centre for Mineral Technology (CETEM), Rio de Janeiro 21941-908, Brazil; ogomes@cetem...Federal do Rio de Janeiro, Rio de Janeiro 20940-040, Brazil Correspondence: rhiragavc@gmail.com Abstract:...concentrates and pellets are a major export product of Brazil. Its mineralogy is generally simple, the main iron-bearing...Carajás (state of Pará, northern Brazil) ore, and hematite with goethite in very variable amounts and rare...Quadrilátero Ferrífero (state of Minas Gerais, southeast of Brazil), as well as diverse gangue minerals |  | Fernandes, Alexandre Martins, Conceição, Fabiano Tomazini da, Spatti Junior, Eder Paulo, Sardinha, Diego de Souza, Mortatti, Jeferson (2016) Chemical weathering rates and atmospheric/soil CO2 consumption of igneous and metamorphic rocks under tropical climate in southeastern Brazil. Chemical Geology, 443. 54-66 doi:10.1016/j.chemgeo.2016.09.008 | Journal (article/letter/editorial) | | metamorphic rocks under tropical climate in southeastern Brazil Alexandre Martins Fernandes, Fabiano Tomazini da...metamorphic rocks under tropical climate in southeastern Brazil, Chemical Geology (2016), doi: 10.1016/j.chemgeo...tropical climate in southeastern SC RI P T Brazil NU Alexandre Martins Fernandes1, Fabiano Tomazini...13506-900, RI P Bela Vista, Rio Claro, São Paulo, Brazil. Phone: +55 19 3526-9358. e-mail: AC CE PT ED...metamorphic rocks under tropical climate in southeastern Brazil were evaluated using the chemical composition of |  | | Journal (article/letter/editorial) | | soon progressed to shallow depth, resulting in a mine. The numbers of mines and intensity of ACCEPTED...colonialism, modern economic booms (Belich, 2009). Active mine numbers and sizes skyrocketed during two World Wars...rapidly growing number of mineral discoveries and mine establishment was partly driven by the discovery...of conquests and non-military acquisitions. But mine importance and fame did not necessarily correspond...obsolete (for example, recent reserves of a mature mine only, or IP past production for a period of time) |  | Pereira, Lucas, Birtel, Sandra, Möckel, Robert, Michaux, Bruno, Silva, Andre C., Gutzmer, Jens (2019) Constraining the Economic Potential of By-Product Recovery by Using a Geometallurgical Approach: The Example of Rare Earth Element Recovery at Catalão I, Brazil. Economic Geology, 114 (8) 1555-1568 doi:10.5382/econgeo.4637 | Journal (article/letter/editorial) | | Example of Rare Earth Element Recovery at Catalão I, Brazil Lucas Pereira,1,† Sandra Birtel,1 Robert Möckel...Goiás, Mine Engineering Department, Capes Scholarship POS-DOC-88881.119296/2016–01, Catalão, Brazil 3 Department...Nb production at the Chapadão mine in the Catalão I carbonatite complex is used. Catalão I is part of...in the Goias Province of Brazil. Currently, niobium is produced in the complex as a by-product of the Chapadão...Chapadão phosphates mine. This production is performed in the Tailings plant, the focus of this study |  | Chakhmouradian, Anton R., Reguir, Ekaterina P., Kressall, Ryan D., Crozier, Jeremy, Pisiak, Laura K., Sidhu, Ravinder, Yang, Panseok (2015) Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada): Mineralogy, geochemistry and petrogenesis. Ore Geology Reviews, 64. 642-666 doi:10.1016/j.oregeorev.2014.04.020 | Journal (article/letter/editorial) | | Interaction of the carbonatites with crustal fluids of complex chemistry resulted in extensive dolomitization...the supply market is essentially controlled by Brazil (N90% since 2000: IBRAM, 2012; Moreno, 2011), it...their own sources of this element independent of Brazil (e.g., Dzhumaylo and Skorobogat'ko, 2013; Pistilli...much as 98%) comes from pyrochlore, a family of complex Nb–Ta–Ti oxides capable of accommodating a variety...Ta)2O6] from granites and pegmatites of Africa and Brazil (Bastos Neto et al., 2009; Melcher et al., in this |  | Prokopyev, Ilya R., Doroshkevich, Anna G., Sergeev, Sergey A., Ernst, Richard E., Ponomarev, Jean D., Redina, Anna A., Chebotarev, Dmitry A., Nikolenko, Anna M., Dultsev, Vladislav F., Moroz, Tatyana N., Minakov, Alexey V. (2019) Petrography, mineralogy and SIMS U-Pb geochronology of 1.9–1.8 Ga carbonatites and associated alkaline rocks of the Central-Aldan magnesiocarbonatite province (South Yakutia, Russia) Mineralogy and Petrology, 113 (3) 329-352 doi:10.1007/s00710-019-00661-3 | Journal (article/letter/editorial) | | Alkaline rocks associated with the Muostalaah complex, were also studied. The following U-Pb ages have...wall rocks (Fig. 2 g). Muostalaah carbonatite complex Entin et al. (1991) and Zaitzev et al. (1992) identified...2005). Similar in composition to the Muostalaah complex, scapoliteclinopyroxene rock-samples were found...and hydroxides of Fe and Mn such as haematite, goethite, etc. (Table 1). The weathering crust of the Birikeen...titanomagnetite exsolution (e.g., the Kovdor carbonatite complex, Wall and Zaitsev 2004). The magmatic minerals |  | | Journal (issue) | | – Intruded into volcanites (sills, stocks and complex networks). 3 – Subvolcanic intrusions (sills, dikes...at this domain, the magmatic rocks occur as a complex – multistage intrusions, characterized by a porphyritic...intrusion at the Nicolae horizon of the Săcărâmb mine acc. to Jude (1962, unpubl. data): 1. Hornblende...mineralizations of low-sulphidation type from Baia de Arieş Mine, Southern Apuseni Mts., Romania. Revue Roumaine...paleocalderas can be recognized, which functioned as complex volcanoes, probably true supervolcanoes, whose |  | | Journal (article/letter/editorial) | | characteristics of the REE-enriched carbonatite complex are strongly overprinted by carbo-hydrothermal...of automated mineralogy in the development of complex deposits requires rigorous review of these identification...rare earth elements (REE) are mineralogically complex. With rare exception, e.g., Mountain Pass [33]...Wyoming, USA, within the Bear Lodge alkaline igneous complex (BLAC). It is located approximately 24 km northwest...in northeast Wyoming. The Bear Lodge alkaline complex (BLAC) is shown with areas of significant REE mineralization: |  | | Report (issue) | | for foreign countries, if a given name refers to a mine or deposit, a nearby location or administrative...names may be used to refer to a single deposit or mine. For large deposits or mineralized areas, a 3 single...is meant to identify the area, deposit, district, mine, or occurrence to which the geologic, economic,...Age, Host/Associated Lithology, Host Formation/Complex, Minerals, and Geologic Comments/Deposit Description...Paulista phosphate deposit in Pernambuco State, Brazil, in Notholt, A.J.G., Sheldon, R.P., and Davidson |  | Carrino, T. A., Crosta, A. P., Toledo, C. L. B., Silva, A. M., Silva, J. L. (2015) Geology and Hydrothermal Alteration of the Chapi Chiara Prospect and Nearby Targets, Southern Peru, Using ASTER Data and Reflectance Spectroscopy. Economic Geology, 110 (1) 73-90 doi:10.2113/econgeo.110.1.73 | Journal (article/letter/editorial) | | Pandiá Calógeras, 51, 13083-870 Campinas-São Paulo, Brazil of Geosciences/University of Brasília, Campus...Ribeiro S/n, Asa Norte, 70910-900 Brasília – DF, Brazil Abstract Southern Peru contains several small-...Quiruvilca Arequipa 16°0’0’’S Sipán Arasi FS BRAZIL PERU CC Caylloma Shila Paula Baños del Indio...is operated by Gold Fields Inc. and Compañia de Minas Buenaventura for the exploitation of gold, copper...identify the iron-bearing minerals (e.g., hematite, goethite, and jarosite). These minerals are marked by absorption |  | Nikolenko, Anna M., Redina, Anna A., Doroshkevich, Anna G., Prokopyev, Ilya R., Ragozin, Alexey L., Vladykin, Nikolay V. (2018) The origin of magnetite-apatite rocks of Mushgai-Khudag Complex, South Mongolia: mineral chemistry and studies of melt and fluid inclusions. Lithos, 320. 567-582 doi:10.1016/j.lithos.2018.08.030 | Journal (article/letter/editorial) | | origin of magnetite-apatite rocks of Mushgai-Khudag complex, South Mongolia: Mineral chemistry and studies...origin of magnetiteapatite rocks of Mushgai-Khudag complex, South Mongolia: Mineral chemistry and studies...origin of magnetite-apatite rocks of Mushgai-Khudag Complex, South Mongolia: mineral chemistry and studies...understanding of ore formation. The Mushgai-Khudag complex is a typical example of an intrusion where hydrothermal...characteristics of apatite from the Mushgai-Khudag complex for reconstructing the formation of the magnetite-apatite |
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