👁 Image
| | Journal (issue) | | crystal, 75 mm long,
from the Cruzeiro mine, Minas Gérais, Brazil.
See 'The location, geology and mineralogy...mineralogy of gem
tourmalines in Brazil' on pp. 263-98
ISSN: 1355-4565
262
J. G e m m , 1996, 25, 4
...location, geology and mineralogy of gem
tourmalines in Brazil
Jacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...tourmaline is the 'Eastern pegmatitic province'
of Minas Gerais. One general and three
detailed maps of specific...Non-pegmatitic deposits of tourmaline include the Brumado mine
(Bahia) which produces fine red uvite
crystals and | 👁 Image
| | Journal (issue) | | a n d Peter C. Keller
Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines
of the Governador Valadares...Summer 1985
85
GEM P E G m T I T E S OF MINAS G E M S ,
BRAZIL: THE T O U R W L I N E S OF THE
G O V E...around the city of
Araquai, i n northeastern Minas Gerais, and
discussed 20 important mines in that area...tourmaline mines i n s o ~ ~ ~ h e a s t eMinas
rn
Gerais, in the broad area surrounding the
gemstone capital...and tor her constant
support, The many miners and mine owners who
were so instrumentalin providing information | 👁 Image
| | Book | | until he managed to reach
the land of his dreams, Brazil. A
specialist in the field of geology
and mineralogy...crystals and the remarkable mineral treasures of Brazil, as
well as the incredible adventures and difficulties...UNIQUE MINERALS IN WORLD MUSEUMS
GEM TREASURES OF BRAZIL
Cyan Magenta Yellow Black 1 Delev
Ilia Deleff...UNIQUE MINERALS IN WORLD MUSEUMS
GEM TREASURES OF BRAZIL
SOFIA–MOSCOW
2004
3
Cyan Magenta Yellow Black...NATIONAL
MUSEUM IN SOFIA 66
OTHER COLLECTIONS OF MINE IN BULGARIA
71
COLLECTIONS IN OTHER CITIES AROUND | 👁 Image
| | Report (issue) | | Deposits in
Minas Gerais
Brazil
GEOLOGICAL
SURVEY
BULLETIN
964-C
Mica Deposits in
Minas Gerais
Brazil...M. BARBOSA and RESK FRAYHA, DIVISSO DE
FOMENTO, BRAZIL
GEOLOGIC INVESTIGATIONS IN THE AMERICAN REPUBLICS...da Produgao
Mineral, Ministerio da Agricultura,
Brazil, under the auspices of the
Interdepartmental Committee...__________-___---_____---_-________
Exports of sheet mica from Brazil, 1900-1945-___-__-_______----______
General statement...___________________
Mica-mining industry in Minas Gerais.______________________________
General stat | 👁 Image
| Gomes, Celso de Barros, Azzone, Rogério Guitarrari, Rojas, Gaston Eduardo Enrich, Guarino, Vincenza, Ruberti, Excelso (2021) Agpaitic Alkaline Rocks in Southern Brazilian Platform: A Review. Minerals, 11 (9) 934 doi:10.3390/min11090934 | Journal (article/letter/editorial) | | University of São Paulo, São Paulo 05508-080, Brazil; rgazzone@usp.br (R.G.A.);
gastonenrich@usp.br...occurrences located in southern Brazil
and at the border between Brazil and Paraguay. All the Brazilian...and rinkite, rather than simple minerals such as zircon and ilmenite [1,2]. This term was first proposed...the miaskitic types characteristically
contain zircon, baddeleyite and titanite, whereas the agpaitic...References
1
Poços de Caldas
79–87 (Ar-Ar, K-Ar)
2
Itatiaia
67.5–71.3 Ma (U-Pb)
ring-like nepheline syenite | 👁 Image
| | Journal (issue) | | 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,...
What’s New
corundum, alexandrite, tanzanite, zircon, Imperial
topaz and emerald (and its most common...blood ruby, royal blue and
cornflower sapphire, old mine/
Muzo green emerald, sunrise
and sunset padparadscha...4b), spessartine
(Figure 4c), almandine, quartz, zircon, apatite,
topaz, sillimanite, fluorite, chrysoberyl | 👁 Image
| | Journal (issue) | | Collector—Part II
Fify-nine treasure hunts in Minas Gerais, 1969–2005 . . . . . . . . . . . . . 207
by...crystal cluster on matrix,
6 cm tall, from the
Tsumeb mine, Tsumeb,
Namibia. Sandor Fuss
collection (2004)...Vug,” discovered on the 12th
level of the Cresson mine, Cripple Creek district, Colorado in 1914 (see “The...Mineralogical Record, volume 37, May–June, 2006
Cresson mine manager Dick Roelofs showing the Cresson Vug to...school; he did his Master’s work at the Rueppele iron
mine in Stanton, Missouri. He spent the years 1931–1932 | 👁 Image
| | 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 | 👁 Image
| Amaral, G., Bushee, J., Cordani, U.G., Kawashita, K., Reynolds, J.H. (1967) Potassium-argon ages of alkaline rocks from southern Brazil. Geochimica et Cosmochimica Acta, 31 (2) 117-142 doi:10.1016/s0016-7037(67)80041-3 | Journal (article/letter/editorial) | | Potassium-argon ages of alkaline rocks f~om southern Brazil*
G. AIV~R~L,~ J. BVS~EE,~ U. G. CORDA~,~
K . KAWASHITAt...Department of Geology, University of SRo Paulo, Brazil
(Received 2 May 1966)
A b s t r a c t - - W e...frequency) from 21 alkaline rock localities in southern
Brazil. A general geological description is given for...Mesozoic basaltic rocks that occur widely in southern Brazil and neighboring
c o u n t r i e s , a n d t h e...geologists in alkaline rocks.
Like Africa and Russia, Brazil has one of the greater concentrations of this type | 👁 Image
| | 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 | 👁 Image
| | Book | | BARTORELLI
::• . . ..
MINERALS
& PRECIOUS
STONES
OF BRAZIL
Sponsored by:
VALE
MINISTER.IO
DA CULTURA
©...feldspar, Lin6polis,
Divino das Laranjeiras, Minas Gerais.
Collection of and photograph
by Julio Landmann...26 mm), Lavra do Sapo,
Ferruginha, Conselheiro Pena,
Minas Gerais. Collection of
Alvaro Lucio. Photograph...Brasileira do Livro, SP, Brazil)
Aquamarine (113 mm high), Medina,
Minas Gerais. Collection of S. & C....Cornejo, Carlos
.Minerals & precious stones of Brazil.
Carlos Cornejo, Andrea Bartorelli.
[franslation: | 👁 Image
| Mendes, Julio Cezar, Ávila, Ciro Alexandre, Pereira, Ronaldo Mello, Heilbron, Mônica P.L., Moura, Candido A.V. (2006) 207Pb/206Pb-ages of zircons from syn-collisional I-type porphyritic granites of the central Ribeira belt, SE Brazil. Gondwana Research, 9 (3) 326-336 doi:10.1016/j.gr.2005.11.004 | Journal (article/letter/editorial) | | porphyritic
granites of the central Ribeira belt, SE Brazil
Julio Cezar Mendes a,*,1, Ciro Alexandre Ávila...central segment of the Ribeira belt, southeast Brazil, several foliated porphyritic granitic bodies intrude...more than 1000 km along the southeastern coast of Brazil (Fig.
1). It developed as the result of the amalgamation...the towns of Itatiaia, Visconde de Mauá and Santa
Rita de Jacutinga, in the Minas Gerais/Rio de Janeiro/São...(2006) 326 – 336
327
Fig. 1. Tectonic map of Brazil modified after Schobbenhaus et al. (1984). Legend: | 👁 Image
| Brotzu, P., Gomes, C.B., Melluso, L., Morbidelli, L., Morra, V., Ruberti, E. (1997) Petrogenesis of coexisting SiO2-undersaturated to SiO2-oversaturated felsic igneous rocks: The alkaline complex of Itatiaia, southeastern Brazil. Lithos, 40 (2) 133-156 doi:10.1016/s0024-4937(97)00007-8 | Journal (article/letter/editorial) | | igneous rocks: The alkaline complex of
Itatiaia, southeastern Brazil
P. Brotzu a, C.B. Gomes b, L. Melluso...Geocihbas, Universidade de Skio Paula, Siio Paula, Brazil
’ Dipam’mento di Scienze della Terra, Universith...Received 10 December 1996; accepted 1 April 1997
The Itatiaia aWine complex is a Late Cretaceous intrusion (72...significant lithotype, the potassic affinity of the Itatiaia complex, and the relatively high Sr-isotopic ratios...complex of Itatiaia belongs
to the Cretaceous-Tertiary
alkaline province of
southeastern Brazil, that is | 👁 Image
| | Book | | the finest pieces ever recovered from the Tsumeb mine in Namibia; the worldwide tourmaline collection...specimens of azurite from a major find at the Tsumeb mine in Namibia, Sams and Desautels bought the entire...skeletal crystal growths such as the magLAS CHISPAS MINE, ARIZPE, MUNICIPIO DE ARIZPE, SONORA, MEXICO...2 ADAMITE SAN JUDAS CHIM.'EY, LEVEL 6, OJUELA MINE, MAPIMI, DURANGO, MEXICO Adarnite comes in many...£nest specimens have always come from the Ojuela mine, and by far the most sought-after color is the royal | 👁 Image
| Melluso, Leone, Guarino, Vincenza, Lustrino, Michele, Morra, Vincenzo, de' Gennaro, Roberto (2017) TheREE-and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich felsic melts. Mineralogical Magazine, 81 (2) 217-250 doi:10.1180/minmag.2016.080.122 | Journal (article/letter/editorial) | | REE- and HFSE-bearing phases in the Itatiaia alkaline
complex (Brazil) and geochemical evolution of feldspar-rich...Editor: Jason Harvey]
ABSTR ACT
The Late Cretaceous Itatiaia complex is made up of nepheline syenite grading...in the metamorphic rocks of the Serra do Mar, SE Brazil. The nepheline
syenites are characterized by assemblages...are found with allanite, fluorapatite, fluorite, zircon, thorite,
yttrialite, zirconolite, pyrochlore and...The major- and trace-element composition of the
Itatiaia rocks have variations linked to the amount of | 👁 Image
| | Report (article/chapter) | | do Rio de Janeiro (DGRG/UERJ), Rio de Janeiro, Brazil
2
Programa de Posgraduação, Faculdade de Geologia...Universidade do Estado do Rio de
Janeiro, Rio de Janeiro, Brazil
*Corresponding author (e-mail: mauro.geraldes@gmail...to the Cabo Granite (104 Ma) are observed in
NE Brazil. In West Africa, sparse Aptian–Albian ages are...break-up is presented
below.
In the SE region of Brazil, there were two major
magmatic events in the continental...examples of the abovementioned magmatism in eastern Brazil, West
Africa and adjacent oceanic areas. The Saint | 👁 Image
| | Journal (issue) | | manager
Famous mineral localities: the Broken Hill mine,
Zam bia..............................................351
Famous mineral localities: the Cruzeiro mine,
past and present ................................Warren
A new find of crystallized rose quartz in
Minas G e ra is ........................................B-2120 Schoten
COVER: ELBAITE on
quartz from Minas
Gerais, Brazil. The
crystal is 8.5 mm in
width. Photo by...Kitwe, Zambia
HISTORY
The Broken Hill lead-zinc mine is located near the town of
Kabwe, 140 km north | 👁 Image
| | Book | | On a spectacular find of crocoite in the Adelaide
mine, Dundas, Tasmania (by A. H. Chapman)
3:111-113
ADOLFSSON...AJO
Famous mineral localities: the New Cornelia mine,
Ajo, Arizona (by W. J. Thomas & R. B. Gibbs)
14:283-298...ALLEN, GEORGE B.
--and W. Hunt: The Tonopah-Belmont mine,
Maricopa County, Arizona 19:139-144
ALLGOOD, GENNE...Allgood, C.
Williams: Ramsdellite from the Mistake mine
[Arizona] 14:333-335
ALLGOOD, ROBERT W.
-with G...the Mistake mine
[Arizona] 14:333-335
ALMA
Famous mineral localities: the Home Sweet Home
mine, [near Alma | 👁 Image
| | Book | | Formed in Pegmatites:
57
Gem Pegmatites of Minas Gerais, Brazil
5. Gemstones Formed Directly from Molten...Colombia as an example; the pegmatites of
Minas Gerais, Brazil; and those gemstones formed in a magma at..., was responsible for photographs
of the Argyle mine and the spectacular pink diamond. The Smithsonian...including The Gem Collection
of the Smithsonianj Brazil, Paradise ofGemstonesj Emerald and Other Berylsj...__
ru)8AGI.
BRAZIL
OlamorM'
DI~mond
Drarnolld
PARANAICAo
BRAZIl.
CORQPYlAN OEL.
BRAZIL.
AmOlh)"S' | 👁 Image
| | Book | | Formed in Pegmatites:
57
Gem Pegmatites of Minas Gerais, Brazil
5. Gemstones Formed Directly from Molten...Colombia as an example; the pegmatites of
Minas Gerais, Brazil; and those gemstones formed in a magma at..., was responsible for photographs
of the Argyle mine and the spectacular pink diamond. The Smithsonian...including The Gem Collection
of the Smithsonianj Brazil, Paradise ofGemstonesj Emerald and Other Berylsj...__
ru)8AGI.
BRAZIL
OlamorM'
DI~mond
Drarnolld
PARANAICAo
BRAZIl.
CORQPYlAN OEL.
BRAZIL.
AmOlh)"S' | 👁 Image
| | Journal (issue) | | row, from left:
Euclase, 2.3 cm, from the Gachalá mine, Guavió-Guatéque mining district, Boyacá Department...Budd photo.
Tanzanite, 7.6 cm, from the Merelani mine near Arusha, Tanzania. Barry & Beth Kitt collection;...Fluorite on quartz, 13 cm, from the Yaogangxian mine, Chenzhou Prefecture, Hunan Province, China.
The...kunzite), 9 cm, from the Urucum mine, Galiléia, Minas Gerais, Brazil.
Gus & Jane Eifler collection; Holly...the Musonoi
mine, Zaire (#950). Jerry Cone photo.
Adamite, 5-mm view, from the
Mohawk mine, San Bernardino | 👁 Image
| Thompson, R. N., Gibson, S. A., Mitchell, J. G., Dickin, A. P., Leonardos, O. H., Brod, J. A., Greenwood, J. C. (1998) Migrating Cretaceous-Eocene Magmatismin the Serra do Mar Alkaline Province,SE Brazil: Melts from the Deflected Trindade Mantle Plume?. Journal of Petrology, 39 (8) 1493-1526 doi:10.1093/petroj/39.8.1493 | Journal (article/letter/editorial) | | Magmatism
in the Serra do Mar Alkaline Province,
SE Brazil: Melts from the Deflected
Trindade Mantle Plume...UNIVERSIDADE DE BRASÍLIA,
70910 BRASÍLIA DF, BRAZIL
RECEIVED JULY 30, 1997; REVISED TYPESCRIPT ACCEPTED...volcanic remnants, and dyke swarms along
coastal SE Brazil. The igneous rocks are emplaced into
metamorphics...mantle plume impacted at ~85 Ma beneath interior SE Brazil
where the lithosphere was too thick (>150 km),...strongly alkaline magmatism
at Lages, southern Brazil, a site of localized rifting. After ~80
Ma, as | 👁 Image
| | Report (issue) | | REPORT
Brazil Investigations
(IR)BR-76
NIOBIUM (COLUMBIUM) AND TANTALUM
RESOURCES OF BRAZIL
U. S. Geological... NIOBIUM (COLUMBIUM) AND TANTALUM
RESOURCES OF BRAZIL
By
Max G. White
U.S. Geological Survey
CONTENTS...Distribution of alkalic intrusives in Southern Brazil .. 16
Alkalic intrusions in the western side of...geologic setting of deposits .............. 24
Minas Gerais ...................................... 24
Bahia................................. 25
Northeastern Brazil ............................... 25
Territory of | 👁 Image
| | Journal (issue) | | York
circulation manager
Articles
The Boltsbum mine, Weardale, County Duiham,
England ................ Bariand
Arsenate minerals of the Sterling Hill mine:
an overview .....................................tall, from
the Virgem da Lapa
district, Minas Gerais,
Brazil. Sorbonne collec
tion, photo by Nelly
and...The Mineralogical Record Jan uary-February, 1982
mine
Weardale, CpuntyJ)urham,
England
t h
e
B
o
l...1800’s, fine specimens have issuedfrom
the Boltsburn mine and are still occasionally available today.
W
| 👁 Image
| | Journal (issue) | | volume 48, September–October, 2017
Figure 2. Mine workings at Paprok. Peter Lyckberg photo.
In the...far more profitable to mine a simple granite to crush for road
ballast than to mine a pegmatite in the hope...topaz occurring in the much older pegmatites of Brazil, the Urals and
the Ukraine. Radiation-induced colors...Paprok village.
Peter Lyckberg photo.
Figure 5. Mine workings in
the Mawi pegmatite. Ikram
Mohammad photo...629
Figure 41. Miners taking a break in the Mawi mine. Ikram Mohammad photo.
Mawi has also produced an |
|
