 | de Souza, J. L., Mendes, J. C., da Silveira Bello, R. M., Svisero, D. P., Valarelli, J. V. (1992) Petrographic and microthermometrical studies of emeralds in the ‘Garimpo’ of Capoeirana, Nova Era, Minas Gerais State, Brazil. Mineralium Deposita, 27 (2) 161-168 doi:10.1007/bf00197103 | Journal (article/letter/editorial) | | the 'Garimpo' of Capoeirana, Nova Era, Minas Gerais State, Brazil J.L. de Sonza ~, J. C. Mendes 1, S...Preto, Ouro Preto, Minas Gerais, Brazil 2 IG, Universidade de S~o Paulo, S~o Paulo, Brazil Received: November...the area of the Capoeirana emerald deposit, Minas Gerais State, revealed two main lithostructural units...the paragenesis talc + tremolite + carbonate + biotite-phlogopite + chlorite of the emerald wall rocks...the extent of a emeraldiferrous province in Minas Gerais State, which begins at northern Rio Casca and |  | | Report (issue) | | Geology and Ore Deposits of the Itabira District Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL... Geology and Ore Deposits of the Itabira District Minas Gerais, Brazil By JOHN VAN N. DORR 20 and ALUIZIO...GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-C...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation...rocks_____________________________ Geology of the Itabira district__-___-_________________ Stratigraphy. |  | | Journal (article/letter/editorial) | | granitic rocks of the Quadrilatero Ferrifero, Minas Gerais, Brazil, suggest three ages of intrusion: 2400 m...and also in a region 7 km north of nearest known Minas series metasedimentary rocks (Late Precambrian age);... (2) granitized beds of the Minas series, and (3) granite between Minas beds and the 1350 m.y. granite...the peripheral area of the 1350 m.y. granites and Minas metasedimentarv rocks. have been mapped belong...(Table 1, Group II) have metamorphosed it. The Minas series overlies the Rio das Velhas with profound |  | | Report (issue) | | the Departmento National da Produ^ao Mineral of Brazil under the auspices of the Agency for International...Ferrifero, Minas Gerais, Brazil By NORMAN HERZ REGIONAL GEOLOGY OF THE QUADRILATERO FERRIFERO, MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL Prepared in cooperation with the Departmento Nacional da Produqao...Produqao Mineral of Brazil under the auspices of the Agency for International Development of the United...Ferrifero, Minas Gerais, Brazil. (Regional geology of the Quadrilatero Ferrifero, Minas Gerais, Brazil) (Geological |  | | Report (issue) | | Igneous Rocks of the Quadrilatero Ferrifero, Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-B...the Departmento Nacional da Producao Mineral of Brazil under the auspices oj the Agency for International...Ferrifero, Minas Gerais, Brazil By NORMAN HERZ REGIONAL GEOLOGY OF THE QUADRILATERO FERRlFERO, MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-B Prepared in cooperation with the Departmento...Departmento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International Development |  | | Journal (article/letter/editorial) | | hematite ore at the Quadrilátero Ferrífero, Minas Gerais, Brazil and its possible genetic significance F...are hosted by the Proterozoic itabirites of the Itabira iron formation. These deposits are widely distributed...deposits of high-grade, compact hematite of QF, Minas Gerais, Brazil, averaging 68%Fe and < 1%SiO2, totalling...Janeiro), Ilha do Fundão, Rio de Janeiro RJ 21949-900, Brazil (frpires@geologia.ufrj.br). Based on a contribution...hematite ore at the Quadrilátero Ferrífero, Minas Gerais, Brazil and its possible genetic significance 1 |  | Lynch, E. P., Costanzo, A., Feely, M., Blamey, N. J. F., Pironon, J., Lavin, P. (2014) The Piteiras emerald mine, Minas Gerais, Brazil: fluid-inclusion and gemmological perspectives. Mineralogical Magazine, 78 (7) 1571-1587 doi:10.1180/minmag.2014.078.7.04 | Journal (article/letter/editorial) | | pp. 1571–1587 The Piteiras emerald mine, Minas Gerais, Brazil: fluid-inclusion and gemmological perspectives...faceted emeralds from the Piteiras Mine, Minas Gerais, Brazil. These data complement those of Rondeau...euhedral-to-anhedral crystals disseminated in biotite-phlogopite schist and range from 0.5 to 50 mm long... schist-hosted emeralds. K EY WORDS : Emerald, Brazil, gemmology, fluid inclusions, microthermometry,...~10 20% of world emerald production, which ranks Brazil second after Colombia (Schwarz and Giuliani, 2002; |  | | Journal (article/letter/editorial) | | evolution of the Quadrilfitero Ferrifero, Minas Gerais, Brazil Farid Chemale Jr.a, Carlos A. RosiCreb and...Sa’oLeopoldo, RS, Brazil bCentro de Pesquisas M. T. da Costa/IGC, UniversidadeFederal de Minas Gerais. Pampulha...Pampulha, 31270-000 Belo Horizonte, MC, Brazil ‘Departamento de Geologia, UniversidadeFederal de Ouro Preto...Preto. Morro do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil Received February 3, 1992; revised version accepted...regional synclines in the overlying Rio das Velbas and Minas supergroups strata. Such regional synclines are |  | | Report (issue) | | Campo Dom Bosco, and Ouro Branco Quadrangles Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-B...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation...Quadrangles Minas Gerais, Brazil By ROBERT F. JOHNSON GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-B Prepared in cooperation with the Departamento...Departamento National da Producao Mineral of Brazil under the auspices of the International Cooperation Administration |  | | Report (issue) | | and Ore Deposits of the Alegria District, Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-J...the Departamento National da Producao Mineral of Brazil under the auspices of the Agency for International...District, Minas Gerais, Brazil By CHARLES H. MAXWELL GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-J Prepared in cooperation with the Departamento...Departamento National da Producao Mineral of Brazil under the auspices of the Agency for International Development |  | | Report (issue) | | the Nova Lima and Rio Acima Quadrangles Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-A...the Departamento N acional da Producao Mineral of Brazil under the auspices of the International Cooperation...Quadrangles Minas Gerais, Brazil By JACOB E. GAIR GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation...bodies Age relations__ __ 6 33 '58 6 Raposos mines Minas series6 33 60 Bicalho mine 6 33 Caraga group6 60 |  | | Report (issue) | | Monlevade and Rio Piracicaba Quadrangles, Minas Gerais Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-E...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...Quadrangles, Minas Gerais Brazil By ROBERT G. REEVES GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...____________ Itabirite. - _______________________ Minas Series_-_--_____--_______--___-__-_ Caraga Grou |  | | Report (issue) | | Deposits of the Western Serra do Curral, Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-G...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...Curral, Minas Gerais, Brazil By GEORGE C. SIMMONS GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-G Prepared in cooperation with the Departamento...Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International Development |  | | Journal (article/letter/editorial) | | Relations in Iron Ores from the Iron Quadrangle, Brazil: The Correlation of Oxygen Isotope Variations with...hematite-rich ore bodies in the Iron Quadrangle, Brazil. The area studied can be divided into two different...peak metamorphic conditions of the Proterozoic Minas metamorphism 2,000 m.y. ago. Iron ores which have...quartz iron formations - known as itabirites in Brazil - appears to have been a dominant process in the...such as those found in the Iron Quadrangle, Minas Gerais, Brazil. While these ores comprise only a few per |  | | Journal (issue) | | Pearl Testing 36 Emeralds from South America – Brazil and Colombia 48 Clinohumite – The Mountain Fire...rise of new economies such as China, India, and Brazil. The challenges have been numerous as these new...every ICA member, I would like to thank the IBGM in Brazil along with every company, individual, and government... G E M O LO G Y Emeralds from South America – Brazil and Colombia By Dr. Dietmar Schwarz, research manager...gemology, Federal University of Ouro Preto, Minas Gerais (UFOP); and Dr. Leo Klemm, analyst, Gübelin |  | | Journal (article/letter/editorial) | | ©Springer-Verlag 1990 Origin of emerald deposits of Brazil G. Giuliani 1. 2 , L. J. H. D. Silva 3 and P. Couto...Couto 4 1 2 3 4 ORSTOM, Universidade de Brasilia, Brazil c.R.P.G., 15 Rue N.D. des Pauvres, BP 20, 54501...Metais Ltda, Bahia, Brazil Secretaria das Minas e Energia, C.P.R.M./SGM, Bahia, Brazil Abstract. Precambrian...Precambrian emerald deposits of Brazil are found in a typical geologic setting with Archean basement and supracrustal...Emerald mineralization belongs to the classic biotite-schist deposit, which formed by the reaction of |  | Cabral, A. R., Zeh, A., Galbiatti, H. F., Lehmann, B. (2015) LATE CAMBRIAN Au-Pd MINERALIZATION AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 Ma: CONSTRAINTS FROM U-Pb MONAZITE DATING OF A JACUTINGA LODE. Economic Geology, 110 (1) 263-272 doi:10.2113/econgeo.110.1.263 | Journal (article/letter/editorial) | | MINERALIZATION AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 MA: CONSTRAINTS FROM U-Pb...Ferrosos, Vale, Miguelão, 34000-000 Nova Lima-MG, Brazil Abstract Bonanza-style mineralization of palladiferous...century in the province that became known as Minas Gerais. The timing of this itabirite-hosted vein mineralization...events recorded in the Quadrilátero Ferrífero of Minas Gerais, the ~2.0 Ga Transamazonian event and the ~0...recovered from the Conceição Fe-ore deposit within the Itabira district. The monazite analyses yield a precise |  | Vial, D.S., Duarte, B.P., Fuzikawa, K., Vieira, M.B.H. (2007) An epigenetic origin for the Passagem de Mariana gold deposit, Quadrilátero Ferrífero, Minas Gerais, Brazil. Ore Geology Reviews, 32 (3) 596-613 doi:10.1016/j.oregeorev.2005.03.017 | Journal (article/letter/editorial) | | Mariana gold deposit, Quadrilátero Ferrífero, Minas Gerais, Brazil D.S. Vial a,⁎, B.P. Duarte b , K. Fuzikawa...Vale do Rio Doce, BR381, Km 459, Santa Luzia, MG, Brazil Faculdade de Geologia da Universidade do Estado...Francisco Xavier, 524, Maracanã, Rio de Janeiro, RJ, Brazil c CDTN-Centro de Desenvolvimento da Tecnologia...Horizonte, MG, Brazil d Companhia Vale do Rio Doce, BR262, Km 296, Santa Luzia, MG, Brazil b Received...that juxtaposes the itabirite (Lower Proterozoic Minas Supergroup) over other units. This shear zone/thrust |  | | Report (issue) | | Mineral Resources of the Barao de Cocais Area Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-H...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...Area Minas Gerais, Brazil By GEORGE C. SIMMONS GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-H Prepared in cooperation with the Departamento...Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International Development |  | Olivo, G. R., Gauthier, M., Williams-Jones, A. E., Levesque, M. (2001) The Au-Pd Mineralization at the Conceicao Iron Mine, ItabiraDistrict, Southern Sao Francisco Craton, Brazil: An Example of aJacutinga-Type Deposit. Economic Geology, 96 (1) 61-74 doi:10.2113/gsecongeo.96.1.61 | Journal (article/letter/editorial) | | the Conceição Iron Mine, Itabira District, Southern São Francisco Craton, Brazil: An Example of a Jacutinga-Type...Abstract The Conceição mine, which is located in the Itabira district, southern São Francisco craton, is a rare...1974; Caddey et al., 1991), the Morro Velho mine in Brazil (Ladeira, 1988, 1991), the Vubachikwe mine in Zimbabwe...(Hamilton and Hodgson, 1986), and several mines in Brazil (Ladeira, 1991; Leão de Sá and Borges, 1991; Olivo...mine is one of the most productive mines of the Itabira district, with an annual yield of 25 million tons |  | | Report (issue) | | Development of the Quadrilatero Ferrifero Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-A...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...Development of the Quadrilatero Ferrifero Minas Gerais, Brazil By JOHN VAN N. DORR 2d REGIONAL GEOLOGY...GEOLOGY OF THE QUADRILATERO FERRIFERO, MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-A...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International |  | Dobrzyński, Dariusz, Duliński, Marek, Birski, Łukasz, Barrett, Jordi (2021) Origin of the chemical composition of São Francisco ultra-fresh thermal water (Itabira region, Minas Gerais, Brazil) Applied Geochemistry, 134. 105090pp. doi:10.1016/j.apgeochem.2021.105090 | Journal (article/letter/editorial) | | Francisco ultra-fresh thermal water (Itabira region, Minas Gerais, Brazil) Dariusz Dobrzyński a, *, Marek...Gonçalves Dias 916, Belo Horizonte, 30140-091, Minas Gerais, Brazil b A R T I C L E I N F O A B S T R A C...water in the Fazenda Giráu, near Itabira (Minas Gerais state, Brazil) for the first time. The studied...modelling Geothermometer Therapeutic water Minas Gerais Brazil 1. Introduction The object of investigations...Quente) mountain range in Itabira microregion, Minas Gerais state, Brazil (Fig. 1). The São Francisco |  | | Journal (article/letter/editorial) | | carbonatefaciesis found in a eugeosynclinalsuite in Minas Gerais, Brazil, and is of the Algoma type. The depositsrange...surficial rock known as canga, depositsof Minas Gerais,Brazil, the presenceof which is very resistantto...Althoughsuchrocks are known in the paragneisses of Brazil, no good term has been developedto describethem...factoryterm #neissicitabiritein their fieldwork in Brazil. The nomenclature of iron-formation at the highergradesof...must be considered to beunsatisfactory. Brazil Minas Gerais Perhapsthe mostwidelyknowniron-formations |  | | Report (issue) | | Resources of the Pico de Itabirito District Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL Prepared...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...District Minas Gerais, Brazil By ROBERTS M. WALLACE GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-F Prepared in cooperation with the Departamento...Departamento Nacional da Producao Mineral of Brazil under the au-spices of the Agency for International Development |  | Morgan, Rachael, Orberger, Beate, Rosière, Carlos A., Wirth, Richard, Carvalho, Camila da Mota, Bellver-Baca, M. Teresa (2013) The origin of coexisting carbonates in banded iron formations: A micro-mineralogical study of the 2.4Ga Itabira Group, Brazil. Precambrian Research, 224. 491-511 doi:10.1016/j.precamres.2012.10.013 | Journal (article/letter/editorial) | | micro-mineralogical study of the 2.4 Ga Itabira Group, Brazil Rachael Morgan a,∗ , Beate Orberger a,b...Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil d Helmholtz Centre...ankerite and sideroplesite in the 2.4 Ga Itabira Group, Brazil. The Itabira Group hosts silicic and dolomitic...depositional environment for the Itabira Group at 2.4 Ga. Limestones of the Itabira Group include early diagenetic...dolomite BIF is found in the 2.4 Ga Itabira Group, Minas Gerais, Brazil (Spier et al., 2007). Here we present |
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