1-20 OF 36 RESULTS FOR

Morro Redondo Brazil

Results shown limited to content with bounding coordinates.
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article

NACARENIOBSITE-(Ce) AND BRITHOLITE-(Ce) IN PERALKALINE GRANITES FROM THE MORRO REDONDO COMPLEX, GRACIOSA PROVINCE, SOUTHERN BRAZIL: OCCURRENCE AND COMPOSITIONAL DATA

Frederico C. J. Vilalva, Silvio R.F. Vlach, Antonio Simonetti
Published: 01 April 2013
The Canadian Mineralogist (2013) 51 (2): 313–332.
DOI: https://doi.org/10.3749/canmin.51.2.313
... 25 03 2013 © The Mineralogical Association of Canada 2013 nacareniobsite-(Ce) britholite-(Ce) EPMA and LA-ICP-MS analysis peralkaline granites Morro Redondo Complex Graciosa Province Brazil Nacareniobsite-(Ce), a sorosilicate with ideal formula Na 3 Ca 3 (REE)Nb(Si 2 O...
FIGURES | View All (11)
PDF
Purchase
Add to Citation Manager
Journal Article

Pseudomorphs of Low Microcline After Adularia Fourlings from the Alto Da Cabeça (Boqueirão) and Morro Redondo Pegmatites, Brazil

Vladimir Bermanec, Marija Horvat, Željka Žigovečki GOBAC, Vladimir Zebec, Ricardo Scholz, Radek Škoda, Reinhard Wegner, Sandra de Brito Barreto, István Dódony
Published: 01 August 2012
The Canadian Mineralogist (2012) 50 (4): 975–987.
DOI: https://doi.org/10.3749/canmin.50.4.975
...Vladimir Bermanec; Marija Horvat; Željka Žigovečki GOBAC; Vladimir Zebec; Ricardo Scholz; Radek Škoda; Reinhard Wegner; Sandra de Brito Barreto; István Dódony Abstract Potassium feldspar crystals from the Alto da Cabeça (Boqueirão), Rio Grande do Norte (sample BQ) and the Morro Redondo. Minas...
FIGURES | View All (9)
PDF
Purchase
Add to Citation Manager
Journal Article

THE CRYSTAL STRUCTURE OF A MICROLITE-GROUP MINERAL WITH A FORMULA NEAR NaCaTa 2 O 6 F FROM THE MORRO REDONDO MINE, CORONEL MURTA, MINAS GERAIS, BRAZIL

Marcelo B. Andrade, Daniel Atencio, Luiz A.D. Menezes Filho, Javier Ellena
Published: 01 April 2011
The Canadian Mineralogist (2011) 49 (2): 615–621.
DOI: https://doi.org/10.3749/canmin.49.2.615
...Marcelo B. Andrade; Daniel Atencio; Luiz A.D. Menezes Filho; Javier Ellena Abstract We present electron-microprobe and single-crystal X-ray-diffraction data for a microlite-group mineral with a formula near NaCaTa 2 O 6 F from the Morro Redondo mine, Coronel Murta, Minas Gerais, Brazil...
FIGURES
PDF
Purchase
Add to Citation Manager
Journal Article

Major- and trace-element composition of REE -rich turkestanite from peralkaline granites of the Morro Redondo Complex, Graciosa Province, south Brazil

F. C. J. Vilalva, S. R. F. Vlach
Published: 01 August 2010
Mineralogical Magazine (2010) 74 (4): 645–658.
DOI: https://doi.org/10.1180/minmag.2010.074.4.645
...F. C. J. Vilalva; S. R. F. Vlach Abstract Turkestanite, a rare Th- and REE -bearing cyclosilicate in the ekanite–steacyite group was found in evolved peralkaline granites from the Morro Redondo Complex, south Brazil. It occurs with quartz, alkali feldspar and an unnamed Y-bearing silicate. Electron...
FIGURES | View All (9)
PDF
Purchase
Add to Citation Manager
Image

Simplified geological map of the Papanduva Pluton, Morro Redondo Complex, S...

Published: 12 September 2023
Figure 1. Simplified geological map of the Papanduva Pluton, Morro Redondo Complex, South Brazil. (1) Silicic and basic-intermediate volcanics associated with the intrusive rocks; granitic petrographic facies: (2) foliated; (3) cataclastic; (4) massive and (5) microgranites. (6) Metaluminous
Image

Geological sketch map showing the Neoproterozoic, A-type Graciosa Province ...

Published: 01 August 2010
F ig . 1. Geological sketch map showing the Neoproterozoic, A-type Graciosa Province in southern Brazil (dark grey plutons) and the Morro Redondo Complex (1) with the Papanduva Pluton highlighted (light grey). The black star is the approximate location of the turkestanite-bearing samples studied
Journal Article

Narsarsukite in peralkaline granites from the Papanduva Pluton, Graciosa Province, south Brazil: Insights from textural and compositional features

Silvio R.F. Vlach, Frederico C.J. Vilalva
Published: 12 September 2023
Mineralogical Magazine (2023) 87 (6): 896–907.
DOI: https://doi.org/10.1180/mgm.2023.70
...Figure 1. Simplified geological map of the Papanduva Pluton, Morro Redondo Complex, South Brazil. (1) Silicic and basic-intermediate volcanics associated with the intrusive rocks; granitic petrographic facies: (2) foliated; (3) cataclastic; (4) massive and (5) microgranites. (6) Metaluminous...
FIGURES | View All (9)
PDF
Purchase
Add to Citation Manager
Journal Article

The Transition from Miaskitic to Agpaitic Rocks, as Highlighted by the Accessory Phase Assemblages in the Passa Quatro Alkaline Complex (SouthEastern Brazil)

Vincenza Guarino, Roberto de' Gennaro, Leone Melluso, Excelso Ruberti, Rogério G. Azzone
Published: 16 May 2019
The Canadian Mineralogist (2019) 57 (3): 339–361.
DOI: https://doi.org/10.3749/canmin.1800073
... SHRIMP zircon ages reported by Rosa & Ruberti (2018) for the nearby Itatiaia massif, which fall in the range of 67.5–71 Ma, with decreasing ages towards the NW. This age interval is also similar to the K-Ar age spread of the nearby Morro Redondo alkaline massif: 67 ± 4 Ma ( Ribeiro Filho...
FIGURES | View All (9)
PDF
Purchase
Add to Citation Manager
Image

Simplified geologic map of the Morro Redondo Complex and surrounding areas ...

Published: 01 April 2013
Fig. 1 Simplified geologic map of the Morro Redondo Complex and surrounding areas in Southern Brazil showing the location of nacareniobsite-(Ce)- and britholite-(Ce)-bearing samples (white stars: samples MR-02, MR-02A and MR-140 and MR-03 and MR-50, respectively) from peralkaline granites
Image

Chondrite normalized REE (left) and trace-element (right) distribution pa...

Published: 01 April 2018
) and turkestanite patterns are compared with data from the Morro Redondo complex (Brazil) taken from Vilalva and Vlach ( 2010 ) and Vilalva et al. ( 2013 ).
Journal Article

ERRATUM

Published: 01 October 2011
The Canadian Mineralogist (2011) 49 (5): 1338.
... the original work is properly cited. In the article entitled “ The crystal structure of a microlite-group mineral with a formula near NaCaTa 2 O 6 F from the Morro Redondo mine, Coronel Murta, Minas Gerais, Brazil ”, by Marcelo B. Andrade, Daniel Atencio, Luiz A.D. Menezes Filho and Javier Ellena [ Can...
PDF
Add to Citation Manager
Image

Geology and setting of the granitic massif. (a) Geological setting and main...

Published: 19 August 2021
; (5) Alto Turvo; (6) Capivari; (7) Órgãos; (8) Farinha Seca; (9) Anhangava; (10) Marumbi; (11) Serra da Igreja; (12) Morro Redondo Complex; (13) Palermo; (14) Agudos do Sul; (15) Rio Negro; (16) Dona Francisca; (17) Piraí; (18) Serra Alta; and (19) Corupá. (b) Geological map of the Mandira Granite
Image

(a) Alkaline provinces of southeastern Brazil and their relationships with ...

Published: 16 May 2019
( De La Roche et al . 1980 ). (d) Differentiation Index (D.I.) versus Peralkaline Index (P.I.) diagram for the Passa Quatro rocks. The data for syenites and phonolites from Morro Redondo, Itatiaia, Poços de Caldas, Morro de Sao João, and the Montiquiera Range are from Brotzu et al . (1989 , 1992
Journal Article

SILICA-UNDERSATURATED PORTION OF THE SYSTEM NEPHELINE – KALSILITE – SiO 2 AT 2 GPa [P(H 2 O) = P(Total)]

Alok K. Gupta, Mrigank Mauli Dwivedi, Hirak Bhattachariya, Soumitra Dasgupta
Published: 01 October 2010
The Canadian Mineralogist (2010) 48 (5): 1297–1313.
DOI: https://doi.org/10.3749/canmin.48.5.1297
... as a subsolidus assemblage. The bulk composition of nepheline syenites from the Morro Redondo alkaline complex, Brazil, has been plotted in the nepheline – kalsilite – silica system (arrow b.–u in Fig. 8 ). Different rock-types from the same petrographic province plot along a curved path, as shown...
FIGURES | View All (8)
PDF
Purchase
Add to Citation Manager
Journal Article

Structural segmentation, inversion, and salt tectonics on a passive margin: Evolution of the Inner Kwanza Basin, Angola

Michael R. Hudec, Martin P.A. Jackson
Journal: GSA Bulletin
Published: 01 October 2002
GSA Bulletin (2002) 114 (10): 1222–1244.
DOI: https://doi.org/10.1130/0016-7606(2002)114<1222:SSIAST>2.0.CO;2
... ), eastern Canada ( Sinclair, 1995 ; Withjack et al., 1995 ), the southeastern United States ( Behrendt et al., 1983 ; Talwani, 1990 ; Weems and Lewis, 2002 ), Brazil ( Cobbold et al., 2001) , west-central Africa ( Teisserenc and Villemin, 1989 ; Dailly, 2000 ), Morocco ( Laville and Piqué, 1992...
FIGURES | View All (17)
PDF
Purchase
Add to Citation Manager
Journal Article

Two Rinkite-Group (Seidozerite-Supergroup) Minerals: Nacareniobsite-(Y), a New Mineral from the Darai-Pioz Alkaline Massif, Tajikistan, and Crystal-Structure Refinement of Nacareniobsite-(Ce)

Atali A. Agakhanov, Maxwell C. Day, Elena Sokolova, Vladimir Yu. Karpenko, Frank C. Hawthorne, Leonid A. Pautov, Igor V. Pekov, Anatoly V. Kasatkin, Vitalia A. Agakhanova
Published: 28 December 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (6): 1123–1136.
DOI: https://doi.org/10.3749/2300029
... by Sokolova & Cámara (2017) . Vilalva et al . (2013) described nacareniobsite-(Ce) from the Morro Redondo complex, southern Brazil, and referred to three other occurrences of this rare mineral in alkaline undersaturated rocks. Rønsbo et al . (2014) reported on the rinkite-(Ce)-nacareniobsite-(Ce...
FIGURES
PDF
Purchase
Add to Citation Manager
Journal Article

The REE - and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich felsic melts

Leone Melluso, Vincenza Guarino, Michele Lustrino, Vincenzo Morra, Roberto de’ Gennaro
Published: 01 April 2017
Mineralogical Magazine (2017) 81 (2): 217–250.
DOI: https://doi.org/10.1180/minmag.2016.080.122
.... , Morbidelli , L. , Ruberti , E. , Sigolo , J.B. , Traversa , G. and Valença , J.G. ( 1989 ) Petrological and geochemical studies of alkaline rocks from continental Brazil. 8. The syenitic intrusion of Morro Redondo, R.J . Geochimica Brasiliensis , 3 , 63 – 80 . Brotzu , P...
FIGURES | View All (11)
PDF
Purchase
Add to Citation Manager
Journal Article

Fluorcalciomicrolite, (Ca,Na,□) 2 Ta 2 O 6 F, a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil

M. B. Andrade, D. Atencio, A. I. C. Persiano, J. Ellena
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 2989–2996.
DOI: https://doi.org/10.1180/minmag.2013.077.7.08
... for the FTIR data. References Andrade M.B. Atencio D. Menezes Filho L.A.D. Ellena J. ( 2011 ) The crystal structure of a microlite-group mineral with a formula near NaCaTa 2 O 6 F from the Morro Redondo mine, Coronel Murta, Minas Gerais, Brazil . The Canadian Mineralogist , 49...
FIGURES | View All (4)
PDF
Purchase
Add to Citation Manager
Journal Article

Oil and Gas Developments in South America, Central America, Caribbean Area, and Mexico in 1987

W. David Wiman
Journal: AAPG Bulletin
Published: 01 October 1988
AAPG Bulletin (1988) 72 (10B): 343–366.
DOI: https://doi.org/10.1306/703C9AC3-1707-11D7-8645000102C1865D
...W. David Wiman ABSTRACT Exploration activity in South America, Central America, the Caribbean area, and Mexico in 1987 showed significant increases in seismic acquisition in Belize, Bolivia, Brazil, Costa Rica, Guatemala, Mexico, Paraguay, and Peru, and a decrease in Chile and Venezuela...
FIGURES | View All (5)
PDF
Purchase
Add to Citation Manager
Journal Article

Crystallization and destabilization of eudialyte-group minerals in peralkaline granite and pegmatite: a case study from the Ambohimirahavavy complex, Madagascar

Guillaume Estrade, Stefano Salvi, Didier Béziat
Published: 01 April 2018
Mineralogical Magazine (2018) 82 (2): 375–399.
DOI: https://doi.org/10.1180/minmag.2017.081.053
...) and turkestanite patterns are compared with data from the Morro Redondo complex (Brazil) taken from Vilalva and Vlach ( 2010 ) and Vilalva et al. ( 2013 ). ...
FIGURES | View All (10)
PDF
Purchase
Add to Citation Manager