👁 Image
| Souza Neto, João Adauto, Legrand, Jean Michel, Volfinger, Marcel, Pascal, Marie-Lola, Sonnet, Philippe (2008) W–Au skarns in the Neo-Proterozoic Seridó Mobile Belt, Borborema Province in northeastern Brazil: an overview with emphasis on the Bonfim deposit. Mineralium Deposita, 43 (2) 185-205 doi:10.1007/s00126-007-0155-1 | Journal (article/letter/editorial) | | Borborema Province in northeastern Brazil: an overview
with emphasis on the Bonfim deposit
João Adauto Souza Neto...located in the
Borborema Province in northeastern Brazil and consists of
a gneiss basement (Archean to Paleo-Proterozoic)...locally gold. Recently, the discovery of gold
in the Bonfim tungsten skarn has resulted in a better
understanding...Recife, Brazil
e-mail: adauto@ufpe.br
J. M. Legrand
Departamento de Geologia,
Universidade Federal do Rio...Rio Grande do Norte,
Campus Universitário,
Lagoa Nova,
CEP 59.072-970 Natal, Brazil
M. Volfinger : M.-L | 👁 Image
| | Journal (article/letter/editorial) | | mineralization at the Bonfim polymetallic skarn deposit, Seridó Mobile Belt,
Borborema Province, Brazil
Nayara Moreira...mineralization at the Bonfim polymetallic skarn deposit, Seridó Mobile
Belt, Borborema Province, Brazil, Ore Geology...mineralization at the Bonfim polymetallic skarn deposit, Seridó Mobile Belt, Borborema
Province, Brazil
Nayara Moreira... da Arquitetura, s/n,
50740-550, Recife (PE), Brazil
Corresponding author:
Nayara Moreira de Mesquista...skarns in the Borborema Province,
northeastern Brazil. The Bonfim W-Mo-Au-Bi-Te skarn occurs within a Neoproterozoic | 👁 Image
| | Journal (article/letter/editorial) | | adjacent
areas, northern São Francisco Craton, Brazil, based on structural geology and
gravimetric modeling...adjacent areas, northern São Francisco Craton, Brazil, based on
structural geology and gravimetric modeling...adjacent
areas, northern São Francisco Craton, Brazil, based on structural geology and
gravimetric modeling...Ulysses Guimarães, 2862, 41213-000 Salvador, BA, Brazil
2. Programa de Pós-Graduação em Geologia, Universidade...Brasília, DF, Brazil
3. Programa de Pós-Graduação em Geologia, Universidade do Vale do Rio dos
Sinos, Avenida | 👁 Image
| | Journal (article/letter/editorial) | | deposits in the Archean Rio das Velhas greenstone belt,
Quadrilátero Ferrífero, Brazil
D.S. Vial a,⁎, G.C...c
a
CVRD—Companhia Vale do Rio Doce, BR 381, km 450, Santa Luzia, MG, Brazil
Instituto de Geociências...Amparo à Pesquisa do Estado de São Paulo,
Rua Major Solbiat, 226, Torrinha, SP, Brazil
c
Fundação Educacional...BR-116, Km 526, Bairro das Graças, Caratinga, MG, Brazil
b
Received 26 June 2003; accepted 2 January 2005...occurrences in the
Archean greenstone belt comprising the Rio das Velhas Supergroup. There are numerous small gold | 👁 Image
| | Report (issue) | | Iron Deposits
of the Western Serra do
Curral, Minas Gerais, Brazil
GEOLOGICAL SURVEY PROFESSIONAL PAPER...the Departamento
Nacional da Producao Mineral of Brazil under
the auspices of the Agency for International...Iron Deposits
of the Western Serra do
Curral, Minas Gerais, Brazil
By GEORGE C. SIMMONS
GEOLOGY AND MINERAL...MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL
GEOLOGICAL
SURVEY PROFESSIONAL PAPER
341-G
Prepared...the Departamento
Nacional da Producao Mineral of Brazil under
the auspices of the Agency for International | 👁 Image
| | Journal (article/letter/editorial) | | protocontinent
in the south São Francisco craton, Brazil
Mariana Brando Soares, Atlas Vasconcelos Corrêa...protocontinent in the south São Francisco craton, Brazil, Gondwana
Research(2019), https://doi.org/10.1016/j...protocontinent in the south São Francisco craton, Brazil
Mariana Brando Soares1, Atlas Vasconcelos Corrêa...de Geociências, Universidade Federal do Rio de Janeiro, Brazil.
2 - Departamento de Geologia, Instituto...Geociências, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
3 - Programa de Pós-Graduação | 👁 Image
| | Journal (issue) | | DRC|Yellow tourmaline from
Mavuco, Mozambique|Tremolite
from Tanzania|Tsavorite from
Ethiopia|Black star...Articles
708 Coloured Stone Mining and Trade in Brazil:
A Brief History and Current Status
By Aurélien...Collection
V. L. Villani photo
p. 758
Cover Photo:
Brazil is the source of a variety of coloured stones,...blood ruby, royal blue and
cornflower sapphire, old mine/
Muzo green emerald, sunrise
and sunset padparadscha...The source of much of this pyrite is the
Huanzala mine in west-central Peru, which has
probably yielded | 👁 Image
| | Journal (article/letter/editorial) | | evolution of the Quadrilfitero Ferrifero, Minas
Gerais, Brazil
Farid Chemale Jr.a, Carlos A. RosiCreb and Issamu...Geologia, Universidadedo Vale do Rio dos Sines, 93023-000 Sa’oLeopoldo, RS, Brazil
bCentro de Pesquisas M....Horizonte, MC,
Brazil
‘Departamento de Geologia, UniversidadeFederal de Ouro Preto. Morro do Cruzeiro, 35400-000...35400-000 Ouro Preto, MG, Brazil
Received February 3, 1992; revised version accepted March 24, 1993
ABSTRACT...nucleation of regional synclines in the overlying Rio das Velbas
and Minas supergroups strata. Such regional | 👁 Image
| | Journal (article/letter/editorial) | | deposit, Quadrilátero
Ferrífero, Minas Gerais, Brazil
Luiz Cláudio Ribeiro-Rodrigues a,⁎, Claudinei Gouveia...35 300-970, Brazil
b
Instituto de Geociências, Universidade de Brasília, Campus Asa Norte, Brasília-DF...Brasília-DF, 31270-901, Brazil
c
Institute of Mineralogy and Economic Geology, Aachen University of Technology...the Quadrilátero Ferrífero, Minas Gerais State, Brazil. The region
constitutes an Archean granite–greenstone...composed of a basement complex (ca. 3.2 Ga), the Rio das Velhas Supergroup
greenstone sequence, and related | 👁 Image
| | Report (issue) | | the
Companhia de Pesquisa de Recursos Minerals of Brazil
UNITED
STATES
GOVERNMENT
PRINTING OFFICE, WASHINGTON...1. Geology—Brazil—Goias (State) 2. Geology, Stratigraphic—Pre-Cambrian. 3. Geology—Brazil—Quadilatero...the
Companhia de Pesquisa de Recursos Minerals of Brazil
Precambrian oceanic rocks, including ophiolitic...carbonate rock of 900-1,300-m.y.
(million year) age (Brazil Dept. Nac. Produgao Min
eral, 1971). The Araxa...character and is considered
to be 620-900 m.y. old (Brazil Dept. Nac. Produ | 👁 Image
| | Journal (article/letter/editorial) | | schorl. Other mineral inclusions are fluorapatite, tremolite, and calcite. All Kamakanga emeralds
contain at...The Kamakanga deposit is hosted by
of the local mine. The majority of the studied samples appeared as...samples were obtained from the owner
of the local mine. The majority of the studied samples appeared as...hematite, black spot or platelet or dendritic oxide, tremolite,
fluorapatite, calcite, schorl
Inclusions described... such as phlogopite, hematite,
fluorapatite, tremolite, calcite, and schorl. All of the mineral inclusions | 👁 Image
| | Journal (article/letter/editorial) | | ARCHAEAN TERRANES
A REVIEW
107
OF CENTRAL EASTERN BRAZIL:
A. BERNASCONI*
BP Minerals International Llmzted...1983. The Archaean terranes of central eastern Brazil: a review Precambrian Res., 23" 107--131.
This...domains appear to be present in
central eastern Brazil, i.e., the S~o Francisco Craton and the Jequi~...Ltda., Rua Martins Ferreira, 75, Botafogo, Rio de
Janeiro, Brazil.
0301-9268/83/$03.00
© 1983 Elsevier...Publishers B.V
108
GREENSTONE
LITHOS~RATIGRAPHIC
l - rio H,pICUNU
Z RliCRO DOs MACHA~ 5
] GOUVEI/I
PlUll
| 👁 Image
| Giuliani, Gaston, Groat, Lee A., Marshall, Dan, Fallick, Anthony E., Branquet, Yannick (2019) Emerald Deposits: A Review and Enhanced Classification. Minerals, 9 (2) 105 doi:10.3390/min9020105 | Journal (article/letter/editorial) | | sub-types hosted in: (IA) Mafic-ultramafic rocks (Brazil, Zambia,
Russia, and others); (IB) Sedimentary...sub-types hosted in: (IIA)
Mafic-ultramafic rocks (Brazil, Austria); (IIB) Sedimentary rocks-black shale...ct. Insufu rough emerald extracted from the Kagem mine
in 2015. Lastly, on the 2th of October, the remarkable...(“the lion elephant”)
was extracted from the same mine [3]. Other giant crystals have been discovered in...emerald crystals was discovered in the Carnaíba mine, Brazil; the specimen
weighed 341 kg with 1.7 million | 👁 Image
| Lord, R. A., Prichard, H. M., S.SA, J. H., Neary, C. R. (2004) Chromite Geochemistry and PGE Fractionation in the Campo Formoso Complex and Ipueira-Medrado Sill, Bahia State, Brazil. Economic Geology, 99 (2) 339-363 doi:10.2113/gsecongeo.99.2.339 | Journal (article/letter/editorial) | | Complex and Ipueira-Medrado Sill, Bahia State, Brazil
R. A. LORD,†
Clean Environment Management Centre...Geociências, Universidade Federal da Bahia, Salvador, Brazil
AND C. R. NEARY
Formerly at Natural Environment...orthopyroxene relicts in an upper unit at the Cascabulhos mine.
Microprobe studies of chromite-rich specimens from...11:35 AM Page 340
340
LORD ET AL.
Introduction
BRAZIL has ranked seventh in terms of world chromite production...contain the
largest known reserves of chromite in Brazil, with potential
reserves totaling 52 and 30 million | 👁 Image
| | Report (issue) | | Rocks
of the Quadrilatero Ferrifero,
Minas Gerais, Brazil
GEOLOGICAL
SURVEY PROFESSIONAL PAPER 641-B
Prepared...the Departmento
Nacional da Producao Mineral of Brazil
under the auspices oj the
Agency for International...Gerais, Brazil
By NORMAN HERZ
REGIONAL GEOLOGY OF THE QUADRILATERO FERRlFERO,
MINAS GERAIS, BRAZIL
GEOLOGICAL...the Departmento
Nacional da Producao Mineral of Brazil
under the auspices of the
Agency for International...map of the Quadrildtero Ferrffero, Minas Gerais, Brazil showing areas of gneissic and igneous
rocks___ | 👁 Image
| | Report (issue) | | the Departmento
National da Produ^ao Mineral of Brazil
under the auspices of the
Agency for International...Gerais, Brazil
By NORMAN HERZ
REGIONAL GEOLOGY OF THE QUADRILATERO FERRIFERO,
MINAS GERAIS, BRAZIL
GEOLOGICAL...the Departmento
Nacional da Produqao Mineral of Brazil
under the auspices of the
Agency for International...Minas Gerais, Brazil.
(Regional geology of the Quadrilatero Ferrifero, Minas Gerais, Brazil) (Geological...Petrology Brazil Quadrilatero do Ferro. 3. Geology, Stratigraphic Pre-Cambrian.
I. Brazil. Departamento | 👁 Image
| | Journal (article/letter/editorial) | | com/loi/tigr20
Geology and Mineral Resources of Brazil: A
Review
a
a
Inacio De Medeiros Delgado , Augusto...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil
b
US. Geological Survey, Denver, CO, 80225
Version...Thorman (1994):
Geology and Mineral Resources of Brazil: A Review, International Geology Review, 36:6,...rights reserved.
Geology and Mineral Resources of Brazil: A Review
INACIO DE MEDEIROS DELGADO, AUGUSTO J...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil
AND CHARLES H. THORMAN
US. Geological Survey, Denver | 👁 Image
| | Journal (article/letter/editorial) | | the octahedral and
tetrahedral substitution, and do not substitute for Be or
Al (Auriscchio et al., 1988)...of emerald occur in
Colombia, Zambia, Pakistan, Brazil, Russia, Afghanistan,
Zimbabwe and Madagascar....1986). Although the earlier Somerset mine and
the later Cobra mine have been the main source of the
emeralds...the
1960s, the Gravelotte Project was the largest mine of its type in
the world, employing over 400 sorters...AFRICA
Figure 3. The Leydsdorp Gravelotte Emerald Mine (GEM) showing the Cobra Pit and surroundings (after | 👁 Image
| | Journal (article/letter/editorial) | | margin of the São Francisco paleocontinent (SE Brazil):
Constraints from metamafic–ultramafic rocks
Marco...Geological Survey of Brazil – CPRM, Av Brazil 1731, Belo Horizonte 30140-002, Brazil
Department of Mineral...The Campos Gerais Domain (CGD) in southeastern Brazil is an approximately 180 km 35 km area of
Archean–Proterozoic...margin
of the São Francisco paleocontinent (SE Brazil): Constraints from metamafic–ultramafic rocks,...Ga.
The Campos Gerais Domain (CGD) in southeast Brazil is a
180 km 35 km area of Archean–Proterozoic | 👁 Image
| Verma, Sanjeet K., Oliveira, Elson P., Silva, Paola M., Moreno, Juan A., Amaral, Wagner S. (2017) Geochemistry of komatiites and basalts from the Rio das Velhas and Pitangui greenstone belts, São Francisco Craton, Brazil: Implications for the origin, evolution, and tectonic setting. Lithos, 284. 560-577 doi:10.1016/j.lithos.2017.04.024 | Journal (article/letter/editorial) | | basalts from the Rio das Velhas and Pitangui
greenstone belts, São Francisco Craton, Brazil: Implications...basalts from the Rio das
Velhas and Pitangui greenstone belts, São Francisco Craton, Brazil: Implications...basalts from the Rio das Velhas and
Pitangui greenstone belts, São Francisco Craton, Brazil: Implications...of Campinas – UNICAMP, 13083-970 Campinas, SP, Brazil
MA
b
NU
a
SC
Sanjeet K. Vermaa,*, Elson P...1
ACCEPTED MANUSCRIPT
ABSTRACT
The Neoarchean Rio das Velhas and Pitangui greenstone belts are situated | 👁 Image
| | Journal (article/letter/editorial) | | STUDIES: THE EXAMPLE OF THE CONCEIÇÃO MINE, QUADRILÁTERO FERRÍFERO, BRAZIL
CARLOS ALBERTO ROSIÈRE†
Instituto...Federal de Minas Gerais, 31270-901 Belo Horizonte MG, Brazil
AND FRANCISCO JAVIER RIOS
Fluid Inclusion and...(CDTN-CNEN),
Cx. Postal 941, 30123-970 Belo Horizonte MG, Brazil
Abstract
Petrographic and textural analysis combined...northeastern part of the
Quadrilátero Ferrífero, Brazil, indicate a complex process of oxidation and mineralization...Ferrífero district, Minas Gerais, southeastern
Brazil, are host to metamorphosed iron formations, referred | 👁 Image
| Hensler, Ana-Sophie, Hagemann, Steffen G., Brown, Philip E., Rosière, Carlos A. (2014) Using oxygen isotope chemistry to track hydrothermal processes and fluid sources in itabirite-hosted iron ore deposits in the Quadrilátero Ferrífero, Minas Gerais, Brazil. Mineralium Deposita, 49 (3) 293-311 doi:10.1007/s00126-013-0486-z | Journal (article/letter/editorial) | | deposits
in the Quadrilátero Ferrífero, Minas Gerais, Brazil
Ana-Sophie Hensler & Steffen G. Hagemann &
Philip...Heidelberg 2013
Abstract The Quadrilátero Ferrífero, Brazil, is presently the
largest accumulation of single...Gerais,
Belo Horizonte, Minas Gerais 31270-901, Brazil
and/or the infiltration of small volumes of isotopically...jaspilite-hosted iron ore of Carajás in the north of Brazil,
the ore bodies of the Transvaal in South Africa...terranes and the greenstone belt sequence of the Rio das
Velhas Supergroup, which are unconformably overlain | 👁 Image
| | Journal (issue) | | Decade of Change
A New Era for the Historic Coscuez Mine
Esmeraldas Santa Rosa: Our Wealth is Green
Rediscovery...More
Exquisite Emeralds
Magnificent Old Mine Emeralds
143
Mine Visit
A Visit to Colombia’s “Green” Emerald...Origins and Appellation
President
Clement Sabbagh, Brazil
Vice Presidents
Damien Cody, Australia
Nirmal Kumar...Kumar Bardiya, India
Treasurer
Marcelo Ribeiro, Brazil
Secretaries
Bruce Bridges, USA
Santpal Sinchawla...acquiring the majority stake in
the iconic Coscuez mine in Colombia.
The 2015 Symposium focused on the government’s | 👁 Image
| | Book | | BARTORELLI
::• . . ..
MINERALS
& PRECIOUS
STONES
OF BRAZIL
Sponsored by:
VALE
MINISTER.IO
DA CULTURA
©...Crystal of multicolored tourmaline
(84 x 26 mm), Lavra do Sapo,
Ferruginha, Conselheiro Pena,
Minas Gerais...Publication Data (CIP)
(Camara Brasileira do Livro, SP, Brazil)
Aquamarine (113 mm high), Medina,
Minas...Cornejo, Carlos
.Minerals & precious stones of Brazil.
Carlos Cornejo, Andrea Bartorelli.
[franslation:...pedras preciosas do Brasil
Amethyst flower (85 x 60 mm),
Ametista do Sul, Rio Grande do
Sul. Collection | 👁 Image
| | Journal (article/letter/editorial) | | archaeologists, historians, and others [1]. Colombia, Brazil, and Zambia remain at the top of the list of major...of high-quality production are the deposits of Brazil, Russia, and Zambia, but smaller deposits with...within emerald have been found in emeralds from Brazil, Colombia, Russia, Madagascar, and Tanzania [45]...(near the pegmatite) or the talc-actinolite (-tremolite) zone (near the ultramafics) [15]. The solid inclusions...separate Indian emeralds from those of Colombia, Brazil, China (Yunnan), and Afghanistan (Panjshir), [5 |
|
