👁 Image
| Chemale, Farid, Dussin, Ivo A., Alkmim, Fernando F., Martins, Maximiliano Sousa, Queiroga, Gláucia, Armstrong, Richard, Santos, Marcelo N. (2012) Unravelling a Proterozoic basin history through detrital zircon geochronology: The case of the Espinhaço Supergroup, Minas Gerais, Brazil. Gondwana Research, 22 (1) 200-206 doi:10.1016/j.gr.2011.08.016 | Journal (article/letter/editorial) | | through detrital zircon geochronology: The
case of the Espinhaço Supergroup, Minas Gerais, Brazil
Farid Chemale...IG-UnB, 70904-970, Brasília-DF, Brazil
CPGEO/USP, São Paulo, SP, Brazil
IGC-UFMG, Campus da Pampulha, Belo...Horizonte, MG, Brazil
d
DEGEO/EM/UFOP, Morro do Cruzeiro, 35400–000, Ouro Preto, MG, Brazil
e
RSES, ANU...Canberra, Australia
f
PPGGEO, UFRGS, Porto Alegre-RS, Brazil
b
c
a r t i c l e
i n f o
Article history:
Received...2011
Handling Editor: E. Tohver
Keywords:
U–Pb zircon geochronology
Espinhaço Basin
Stenian
São Francisco | 👁 Image
| Cabral, Alexandre Raphael, Tupinambá, Miguel, Zeh, Armin, Lehmann, Bernd, Wiedenbeck, Michael, Brauns, Michael, Kwitko-Ribeiro, Rogerio (2017) Platiniferous gold–tourmaline aggregates in the gold–palladium belt of Minas Gerais, Brazil: implications for regional boron metasomatism. Mineralogy and Petrology, 111 (6) 807-819 doi:10.1007/s00710-017-0496-0 | Journal (article/letter/editorial) | | aggregates in the gold–palladium
belt of Minas Gerais, Brazil: implications for regional
boron metasomatism...The platiniferous gold–palladium belt of Minas
Gerais, Brazil, forms an approximately 240-km-long, roughly...Xavier
524 s. A4016, Rio Janeiro-RJ 20550-050, Brazil
4
Deutsches GeoForschungsZentrum GFZ, Telegrafenberg...Rodovia BR 381,
km 450, Santa Luzia-MG 33040-900, Brazil
tourmaline aggregates seem to be the ultimate...Metasomatism . PdPt . Gold–palladium
belt . Minas Gerais . Brazil
Introduction
Auriferous lode deposits and | 👁 Image
| Guadagnin, Felipe, Chemale, Farid, Magalhães, Antônio J.C., Santana, Ana, Dussin, Ivo, Takehara, Lucy (2015) Age constraints on crystal-tuff from the Espinhaço Supergroup — Insight into the Paleoproterozoic to Mesoproterozoic intracratonic basin cycles of the Congo–São Francisco Craton. Gondwana Research, 27 (1) 363-376 doi:10.1016/j.gr.2013.10.009 | Journal (article/letter/editorial) | | Bento Gonçalves 9500, 91501-970 Porto Alegre, RS, Brazil
Departamento de Geologia, Universidade Federal...Espírito Santo, PO Box 16, 29500-000 Alegre, ES, Brazil
c
Instituto de Geociências, Universidade de Brasília...70904-970 Brasília, DF, Brazil
d
Petrobras E&P-RJ, Av. Chile 45, Rio de Janeiro, RJ, Brazil
e
Centro de Pesquisas... Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
f
Serviço Geológico do Brasil...Brasil — CPRM, SGAN 603, 70830-030 Brasília, DF, Brazil
b
a r t i c l e
i n f o
Article history:
Received | 👁 Image
| Cabral, Alexandre Raphael, Wiedenbeck, Michael, Koglin, Nikola, Lehmann, Bernd, de Abreu, Francisco R. (2012) Boron-isotopic constraints on the petrogenesis of hematitic phyllite in the southern Serra do Espinhaço, Minas Gerais, Brazil. Lithos, 140. 224-233 doi:10.1016/j.lithos.2012.01.011 | Journal (article/letter/editorial) | | phyllite in the southern
Serra do Espinhaço, Minas Gerais, Brazil
Alexandre Raphael Cabral a,⁎, Michael Wiedenbeck...Praça Ramos de Azevedo 206, 01037-010 São Paulo-SP, Brazil
b
c
a r t i c l e
i n f o
Article history:
Received...SIMS
Hematitic phylite
Southern Serra do Espinhaço
Brazil
a b s t r a c t
Metasiliciclastic rocks predominate...Supergroup,
in the southern Serra do Espinhaço, Minas Gerais, Brazil. The lower units also comprise rocks with...hematítico,
in the southern Serra do Espinhaço of Minas Gerais, Brazil, has been
used as a palaeoclimatic indicator | 👁 Image
| | Journal (article/letter/editorial) | | southeastern Brazil)
Marcelo A. Martins-Neto
Departamento de Geologia, Escola de Minas, Uni6ersidade...Morro do Cruzeiro s/n, 35400 -000 Ouro Preto, MG, Brazil
Received 2 June 1999; accepted 20 March 2000
Abstract...succession (Espinhaço Megasequence, southeastern Brazil) indicates deposition in a rift-sag basin. Four...Elsevier Science B.V. All rights reserved.
Keywords: Brazil; Proterozoic; Tectonostratigraphic units; Basin...parts
of the Serra do Espinhaço, southeastern Brazil
(Fig. 1). Because of inversion during the neoproterozoic | 👁 Image
| | Report (article/chapter) | | Geological Survey of Brazil, Av. Ulysses Guimarães, 2862, 41213-000 Salvador,
Brazil (e-mail: apedreira@sa...Espinhaço Supergroup in the
states of Minas Gerais and Bahia (Brazil). These basins contain volcanic rocks...Sergipano, Rio Preto and
Riacho do Pontal belts in Brazil and the West
Congo, Kaoko, Damara, Lufilian, Oubanguides...Waele & Mapani 2002; De
Waele 2005; Fig. 2).
In Brazil these successions have been studied in
detail and...The Palaeo–Mesoproterozoic sedimentary basins
of Brazil, started as intra-continental rifts that
opened | 👁 Image
| Sano, Yuji, Yokochi, Reika, Terada, Kentaro, Chaves, Mario L., Ozima, Minoru (2002) Ion microprobe Pb–Pb dating of carbonado, polycrystalline diamond. Precambrian Research, 113 (1) 155-168 doi:10.1016/s0301-9268(01)00208-x | Journal (article/letter/editorial) | | Uni6ersidade Federal de Minas Gerais, Cidade Uni6ersitaria,
Belo Horizonte 31270 -901, Brazil
d
Department of...conglomerate in diamond-bearing deposit of Minas
Gerais in Brazil together with U–Pb ages of zircons also...(2|; MSWD= 0.012). Seventy six spots on seventy zircon
grains derived from the same conglomerate show...2692 9 20 Ma
and 2931 922 Ma with two concordant zircon outliers of 1726 9 58 Ma and 3599 9 12 Ma. The...conglomerate estimated by other workers. The
3.6 Ga zircon is the oldest record in the South American platform | 👁 Image
| | Journal (article/letter/editorial) | | THE
DIAMOND-B[SARING
MINAS
REGION
OF
NORTHERN
GERAES, BRAZIL.
LUCIANO J. MORAES AND DJALMA GUIMAR_•ES...Stateof
Minas Geraesstretchesfrom the head-watersof the Jequitinhonha
River, Southof Diamantina,northwardto...tributaries,includingthe Rio Arassuahy.
South of Diamantina, the Parafina River and its tributaries
are...main topographical feature of the region between
Diamantina and Grao Mogol is Serra do Espinhago,a mountain...situatedthe principal
mineral depositsof economicvalue to Brazil, such as iron, man-
ganese,gold, and diamonds | 👁 Image
| Cabral, A. R., Tupinambá, M., Lehmann, B. (2013) Spessartine in compact-hematite rock, southern Serra do Espinhaço, Minas Gerais, Brazil, and genesis of compact hematite. Mineralogical Magazine, 77 (8) 3197-3215 doi:10.1180/minmag.2013.077.8.12 | Journal (article/letter/editorial) | | compact-hematite rock, southern Serra do
Espinhaço, Minas Gerais, Brazil, and genesis of compact
hematite
A. R. CABRAL1...Xavier 524 s. A4016, 20550-050 Rio Janeiro-RJ, Brazil
[Received 29 March 2013; Accepted 5 November 2013;...compact-hematite rock, spessartine, REE, Eu anomaly, Minas Gerais, Brazil.
Introduction
GARNET occurs in metamorphosed...hematite from the
southern Serra do Espinhaço, Minas Gerais,
Brazil. We provide microanalytical data, obtained...siliciclastic metasedimentary rocks of the diamantiferous Sopa-Brumadinho Formation (Paternoster,
1980; Hoppe, | 👁 Image
| Ribeiro, A., Teixeira, W., Dussin, I.A., Ávila, C.A., Nascimento, D. (2013) U–Pb LA-ICP-MS detrital zircon ages of the São João del Rei and Carandaí basins: New evidence of intermittent Proterozoic rifting in the São Francisco paleocontinent. Gondwana Research, 24 (2) 713-726 doi:10.1016/j.gr.2012.12.016 | Journal (article/letter/editorial) | | elsevier.com/locate/gr
U–Pb LA-ICP-MS detrital zircon ages of the São João del Rei and
Carandaí basins:...Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Instituto de Geociências, departamento de Mineralogia...(05508-080), Universidade de São Paulo, São Paulo, SP, Brazil
c
Research Fellow of the São Paulo State Research...Geociências, Universidade de São Paulo, São Paulo, SP, Brazil
d
Museu Nacional, departamento de Geologia e Paleontologia...Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
b
a r t i c l e
i n f o
Article history:
Received | 👁 Image
| | 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...northern São Francisco craton known as the
Chapada Diamantina. The cliffs and mesas expose the Mesoproterozoic | 👁 Image
| | Journal (article/letter/editorial) | | DISTRICT,
LESTER
DEPOSITS
MINAS
No. 7
1928
OF
THE
DIA-
GERAES. BRAZIL.
S. THOMPSON.
CONTENTS.
...Uplift and Erosion ..............................
Diamantina Conglomerate ..................................S. THOMPSON.
ducers.This•pplies
especially
to Brazil. Here,withtheimpetusgivendiamondmining in SouthA'frica...•.•-
•7
• e ale
FIG.
I.
Sketchmap of the Diamantina District showinglocationof principal upland deposits...DEPOSITS
OF MINAS
GERAES, BRAZIL.
707
The oldestand most important diamondfield of Brazil, thus
far | 👁 Image
| Cabral, A. R., Lehmann, B., Tupinamba, M., Schlosser, S., Kwitko-Ribeiro, R., de Abreu, F. R. (2009) THE PLATINIFEROUS Au-Pd BELT OF MINAS GERAIS, BRAZIL, AND GENESIS OF ITS BOTRYOIDAL Pt-Pd AGGREGATES. Economic Geology, 104 (8) 1265-1276 doi:10.2113/gsecongeo.104.8.1265 | Journal (article/letter/editorial) | | COMMUNICATIONS
THE PLATINIFEROUS Au-Pd BELT OF MINAS GERAIS, BRAZIL, AND
GENESIS OF ITS BOTRYOIDAL Pt-Pd AGGREGATES...Xavier 524 s. A4016, 20550-050 Rio Janeiro-RJ, Brazil
4 Curt-Engelhorn-Zentrum Archäometrie, D6, 3, D-68159...Luzia-MG, Brazil
6 Votorantim Metais, Praça Ramos de Azevedo 206, 01037-010 São Paulo-SP, Brazil
Abstract...240-km-long, north-trending Au-Pd-Pt belt in Minas Gerais, Brazil, which
hosts hydrothermal Pd-Pt−bearing...gold mineralization reaching from Ouro Preto to Diamantina. The very high
oxidation state required for efficient | 👁 Image
| | Journal (article/letter/editorial) | | carbonado diamond.
Keywords: carbonado, diamond, Brazil, cathodoluminescence, carbon isotopes, nitrogen...textural
studies on four samples of carbonado from Brazil using
cathodoluminescence. The internal variations...diamond-bearing carbonado mine is located in the
Diamantina region within the Espinhaco range, along
the...craton
within the Aracuiai fold belt in east–central Brazil
(Trompette et al. 1992). Four samples of carbonado...coarse-grained sandy matrix of the “Sopa
conglomerate” from the Sopa–Brumadinho Formation
in the lower | 👁 Image
| Gonçalves, Guilherme O., Lana, Cristiano, Buick, Ian S., Alkmim, Fernando F., Scholz, Ricardo, Queiroga, Glaucia (2019) Twenty million years of post-orogenic fluid production and hydrothermal mineralization across the external Araçuaí orogen and adjacent São Francisco craton, SE Brazil. Lithos, 342. 557-572 doi:10.1016/j.lithos.2019.04.022 | Journal (article/letter/editorial) | | Araçuaí orogen
and adjacent São Francisco craton, SE Brazil
Guilherme O. Gonçalves, Cristiano Lana, Ian S...Araçuaí orogen and adjacent São Francisco craton, SE Brazil, LITHOS, https://doi.org/
10.1016/j.lithos.2019...Araçuaí orogen and adjacent São
Francisco craton, SE Brazil
Guilherme O. Gonçalvesa,* goncalves.go@icloud.com... Universidade Federal de Ouro Preto, Escola de Minas,
Departamento de Geologia, Campus Morro do Cruzeiro...(eastern border of the
São Francisco craton, SE Brazil). We sampled hydrothermal minerals (monazite, rutile | 👁 Image
| | Journal (issue) | | Cave karst in the quartzite rocks of Diamantina, Minas Gerais, Brazil ..………….……….………………… 16
Dumitru FRUNZESCU...CAVE KARST IN THE QUARTZITE ROCKS OF DIAMANTINA,
MINAS GERAIS, BRAZIL
Heinrich Adolf HORN1, Essaid BILAL2...RODET5
1
IGC-UFMG, Universidade Federal de Minas Gerais, Belo Horizonte-MG
UMR CNRS 5600 EVS-ENSMSE-Géosciences...district of Diamantina - MG and formed in quartzite rocks of the Espinhaço Supergroup, Sopa-Brumadinho...Noncarbonatic karst, Salitre Cave, Espinhaço Range, Diamantina-MG
1. Introduction
The study of karsts in non-carbonate | 👁 Image
| Mesquita, Áquila Ferreira, Basilici, Giorgio, Soares, Marcus Vinícius Theodoro, Garcia, Richard Guillermo Vásconez (2021) Morphology, accumulation and preservation of draa systems in a Precambrian erg (Galho do Miguel Formation, SE Brazil). Sedimentary Geology, 412. 105807pp. doi:10.1016/j.sedgeo.2020.105807 | Journal (article/letter/editorial) | | Precambrian erg (Galho do Miguel Formation, SE Brazil)
Áquila Ferreira Mesquita, Giorgio Basilici, Marcus...Precambrian erg (Galho do Miguel
Formation, SE Brazil), Sedimentary Geology (2020), https://doi.org/10...Precambrian erg (Galho do
Miguel Formation, SE Brazil)
Áquila Ferreira Mesquita a*, Giorgio Basilici...Geosciences, State University of
Campinas, Campinas, SP, Brazil.
Centro Regional de Investigaciones Científicas...do Miguel Formation, located in the Minas Gerais State - SE Brazil
Journal Pre-proof
(Fig. 1).
This | 👁 Image
| | Journal (article/letter/editorial) | | (Northern Espinhaço, Brazil): LA-ICP-MS age
determinations on relict and recrystallized zircon and
geodynamic...(Northern Espinhaço, Brazil): LA-ICP-MS age
determinations on relict and recrystallized zircon and geodynamic...range at 643±19 Ma.
-
Metamorphic zircon forms from protolith-zircon in a dissolution-
-
ip
t
precipitation...metamorphic overprinting of a psammitic rock
2. Zircon crystals can be replaced completely or can be preserved...preserved
ip
t
completely
3. Local differences in zircon and/or fluid composition decide
cr
4. Age of | 👁 Image
| Talla, D., Beran, A., Skoda, R., Losos, Z. (2011) On the presence of OH defects in the zircon-type phosphate mineral xenotime, (Y,REE)PO4. American Mineralogist, 96 (11) 1799-1808 doi:10.2138/am.2011.3757 | Journal (article/letter/editorial) | | 1799–1808, 2011
On the presence of OH defects in the zircon-type phosphate mineral xenotime, (Y,REE)PO4
Dominik...370 wt ppm to 1.7 wt% H2O.
Keywords: Xenotime, zircon-type, OH defects, rare earth elements, IR spectroscopy...Mogilevsky 2007).
Xenotime is isostructural with zircon, ZrSiO4. A critical review of the phase fields...solid-solution
ranges, and phase transitions of zircon- and monazite-type compounds is given by Kolitsch...the incorporation
mode of the hydrous phase in zircon by discerning structural OH
defects and “secondary | 👁 Image
| Basilici, Giorgio, Ferreira Mesquita, Áquila, Vinícius Theodoro Soares, Marcus, Janočko, Juraj, Philip Mountney, Nigel, Colombera, Luca (2021) A Mesoproterozoic hybrid dry-wet aeolian system: Galho do Miguel Formation, SE Brazil. Precambrian Research, 359. 106216pp. doi:10.1016/j.precamres.2021.106216 | Journal (article/letter/editorial) | | dry-wet aeolian system: Galho do Miguel
Formation, SE Brazil
Giorgio Basilici a, b, *, Áquila Ferreira Mesquita...University of Campinas, 13083-870 Campinas, SP, Brazil
Centro Regional de Investigaciones Científicas...succession of the Galho do Miguel Formation, SE Brazil. The aim is to identify and
discuss what controlling...University of Campinas, 13083-870 Campinas, SP, Brazil.
E-mail address: giorgio@unicamp.br (G. Basilici)...orientation for 1200 km, crossing the states of
Minas Gerais and Bahia (Fig. 2A) (Dussin and Dussin, 1995; | 👁 Image
| | Journal (article/letter/editorial) | | observations, in great part
proposed
paper
made in Brazil bearing upon
thus
far
been
have
unpublished, that...great importance to them, can in some cases, as of zircon,
monazite, xenotime, etc., be referred with tolerable...water) mine in the Bagagem district of
western Minas Geraes, which has been excellently studied by
Messrs...(Bagagem) or of the
other diamantiferous regions of Brazil. Still more peculiar and
I891. E. HUSSAK: In the...of the Brazilian diamond fields,
that of Diamantina in Minas Geraes, there is an apparent relation, first | 👁 Image
| | Journal (article/letter/editorial) | | next, 10 mile wide rivers pouring down from the
Diamantina and Georgina country bear the Queensland flood...biotite. The accessories are
iron oxide, apatite, and zircon.
106. Granite.—This specimen consists of quartz...1911, chap. iii.
li. R. Walls—Diamond Pipes in Brazil.
447
composition, and some of the specimens here...boron.
The Existence of Diamond-bearing "Pipes" in Brazil.
By ROBERT R. WALLS, M.A.,
B.Sc.
(PLATE VIII...controversy as to whether or not there
exist in Brazil diam'ond-bearing " pipes " such as are found in | 👁 Image
| | Journal (article/letter/editorial) | | metaconglomerate
and modern diamondiferous placers of Brazil and
Central Africa. Carbonado is not reliably established...[10]. Carbonado occurred in Sopa metacon
glomerates (MinasJerais, Brazil) 1700–1750 Ma after
annealing...
The Proterozoic Sopa conglomerate contains several
multiage populations of zircon fragments in addition...sometimes contain round, droplike
(“molten” (!)) zircon inclusions [2], which provide
evidence for the | 👁 Image
| | Journal (article/letter/editorial) | | successfully separated from its usual associate,
zircon, and that when monazite and zenotime occur
together... of iron oxide, a mi�ed sample of monazite and
zircon was very neatly and quickly separated without
reducing...Cavallo Morto (Dead Horse) diamond
mine near Diamantina, the extraordinarily abundant
monazite grains...monazite grains should be equally worn with those of
zircon. On the contrary, however, they have been
completely...mineral, to·
gether with the associated accessories (zircon, magne
tite or ilmenite, or both, and occasionally | 👁 Image
| | Journal (issue) | | geology, and notable localities of diamond mining in Brazil, and
outlines plans for future diamond production... Svisero, James E. Shigley, and Robert Weldon
Brazil, which commanded global production in the 1700s...principally in the
states of Minas Gerais and Mato Grosso, are presented.
W
hile Brazil is widely known for...Arraial do Tijuco (later named Diamantina) in the
state of Minas Gerais (Calógeras, 1904; Leonardos,
1959;...and Bartorelli, 2010).
For the next 150 years, Minas Gerais was the world’s
major supplier of gem diamonds |
|
