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Goias alkaline province

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Journal Article
Journal: Geophysics
Published: 12 September 2018
Geophysics (2018) 83 (6): J75–J85.
... of magnetic anomalies in the north and central part of the Goiás Alkaline Province in central Brazil. The RTP fields from the total magnetization directions derived from our method meet the expectations of anomaly symmetry and centering on the outcrops or the edges of the alkaline intrusive bodies...
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Journal Article
Journal: Geophysics
Published: 09 October 2018
Geophysics (2018) 83 (6): J87–J98.
... that the magnetic data be corrected for the regional fields (e.g., International Geomagnetic Reference Field [IGRF]). Tests on real data from part of the Goiás Alkaline Province, Brazil, confirm the potential of the minimum standard deviation of base-level estimates in determining the SIs of the sources by applying...
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Journal Article
Journal: Geophysics
Published: 06 November 2020
Geophysics (2020) 85 (6): J99–J110.
... that fits the observed data. Tests with synthetic data simulating different geologic scenarios show that the final estimated magnetization direction is close to the true one. We apply our method to field data from the Goiás alkaline province, over the Montes Claros complex, in the center of Brazil...
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Journal Article
Journal: Geophysics
Published: 04 October 2013
Geophysics (2013) 78 (6): J87–J98.
... good results if the bodies produce weak- and mid-interfering anomalies. A test on real data over intrusions in the Goiás Alkaline Province, Brazil, retrieved sphere-like sources suggesting 3D bodies. Here, the practical procedure adopted to determine the best structural index is as follows. We first...
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Image
A) Geologic map of the south <span class="search-highlight">Goiás</span> region showing the location of <span class="search-highlight">Goiás</span> alk...
Published: 01 June 2021
Fig. 1. A) Geologic map of the south Goiás region showing the location of Goiás alkaline province (modified after Lacerda et al., 2000 ). B) Simplified geologic map of the Santa Fé ultramafic massif (modified after Golightly, 2010 ) with the drill hole grid. The drill holes used in this work
Image
Plot of MgO  vs  total Fe 2 O 3  (wt.%) of reliable data (see text) for nep...
Published: 14 March 2022
Fig. 1. Plot of MgO vs total Fe 2 O 3 (wt.%) of reliable data (see text) for nepheline and kalsilite from alkaline ultrabasic volcanic rocks (i.e. feldspar-free assemblages) in the two new databases reported in this work. (a) Groundmass nepheline from Goiás Alkaline Province (GAP) potassic
Image
(a) The total magnetic field in the north and central part of the <span class="search-highlight">Goiás</span> Alk...
Published: 12 September 2018
Figure 6. (a) The total magnetic field in the north and central part of the Goiás Alkaline Province, central Brazil. The grid interval is 125 × 125    m . The inclination and declination of the inducing field are − 19 ° and − 18 ° , respectively. Heavy black lines
Journal Article
Published: 14 March 2022
Mineralogical Magazine (2022) 86 (2): 254–262.
...Fig. 1. Plot of MgO vs total Fe 2 O 3 (wt.%) of reliable data (see text) for nepheline and kalsilite from alkaline ultrabasic volcanic rocks (i.e. feldspar-free assemblages) in the two new databases reported in this work. (a) Groundmass nepheline from Goiás Alkaline Province (GAP) potassic...
FIGURES
Journal Article
Published: 01 December 2006
Mineralogical Magazine (2006) 70 (6): 748–749.
... complexes from the Alto Paraguay Province at the border of Brazil (Mato Grosso do Sul state) and Paraguay’ and ‘Mineral chemistry of accessory minerals in alkaline complexes from the Alto Paraguay Province’. I particularly enjoyed the chapter by Brod et al. on what is now called the Goias Alkaline...
Journal Article
Journal: Economic Geology
Published: 01 June 2021
Economic Geology (2021) 116 (4): 837–861.
...Fig. 1. A) Geologic map of the south Goiás region showing the location of Goiás alkaline province (modified after Lacerda et al., 2000 ). B) Simplified geologic map of the Santa Fé ultramafic massif (modified after Golightly, 2010 ) with the drill hole grid. The drill holes used in this work...
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Image
Location with U-Pb ages of the Catalão I ( I  Guarino et al. 2017 ) and Cat...
Published: 01 December 2018
Figure 1. Location with U-Pb ages of the Catalão I ( I Guarino et al. 2017 ) and Catalão II ( II Guarino et al. 2013 ) alkaline-carbonatite complexes in Brazil. The alkaline provinces of the central-southeastern region of the Brazilian Platform, and their relationships to major structural
Image
Generalized, composite palaeotectonic reconstruction for the Mid-Cretaceous...
Published: 01 September 2003
from Talwani & Abreu (2000) . Distribution of Early (red circles) and Late (blue circles) Cretaceous mafic alkaline igneous provinces in and around the Paraná Basin is modified from Gibson et al . (1997) . The strong spatial association of these igneous provinces with the largest NW–SE
Image
( a ) <span class="search-highlight">Alkaline</span> <span class="search-highlight">provinces</span> of southeastern Brazil and their relationships wit...
Published: 01 April 2017
marginal basins; (5) Alkaline provinces; (6) Age of alkaline rocks (diamonds: Permian-Triassic; squares: Early Cretaceous; triangles: Late Cretaceous; circles: Paleogene); (7) Axes of main arcs (AX, Alto Xingu; SV, São Vicente; BJ, Bom Jardim de Goiás; PG, Ponta Grossa; RG, Rio Grande; PP, Ponta Porã); (8
Image
(a) <span class="search-highlight">Alkaline</span> <span class="search-highlight">provinces</span> of southeastern Brazil and their relationships with ...
Published: 16 May 2019
marginal basins; (5) alkaline provinces; (6) age of alkaline rocks (diamonds, Permian-Triassic; squares, Early Cretaceous; triangles, Late Cretaceous; circles, Paleogene); (7) axes of main arcs (AX, Alto Xingu; SV, São Vicente; BJ, Bom Jardim de Goiás; PG, Ponta Grossa; RG, Rio Grande; PP, Ponta Porã); (8
Journal Article
Published: 01 April 2007
American Mineralogist (2007) 92 (4): 711.
... complex, (NW. Argentina), 8. Granite-syenite complex, (Brazil), 9. Kamafugite dominated province (Goias, central Brazil), 10. Kimberlite/lamproite/kamafugite/carbonatite province (Brazil), 11. Kimberlite/lamproite/kamafugite/carbonatite province (Brazil), 12. Huge felsic intrusive complex (Pocos de Caldas...
Journal Article
Published: 01 December 2018
American Mineralogist (2018) 103 (12): 1999–2010.
...Figure 1. Location with U-Pb ages of the Catalão I ( I Guarino et al. 2017 ) and Catalão II ( II Guarino et al. 2013 ) alkaline-carbonatite complexes in Brazil. The alkaline provinces of the central-southeastern region of the Brazilian Platform, and their relationships to major structural...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2015
GSA Bulletin (2015) 127 (1-2): 76–86.
... values plotted against age (Ma). Grains with more than 10% discordancy have been omitted. The gray envelope represents the first to third quartile of modern-day zircons collected from the Amazon River ( Iizuka et al., 2010 ). White polygons represent ε Hf data from the Goiás Massif after Matteini et al...
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Journal Article
Published: 30 May 2018
The Canadian Mineralogist (2018) 56 (3): 303–329.
... . 2013 ) complexes. These alkaline rocks mostly present potassic affinity, with some occurrences showing a sodic affinity. Ultrapotassic rocks are confined to the Alto Paranaíba ( Araújo et al . 2001 , Melluso et al . 2008 ) and Goiás ( Brod et al . 2005 ) provinces in east-central Brazil. The SM...
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Journal Article
Journal: Economic Geology
Published: 01 December 2019
Economic Geology (2019) 114 (8): 1555–1568.
... recovery from an ongoing mining operation. As a case study for this methodology, possible rare earth element (REE) recovery as a by-product of Nb production at the Chapadão mine in the Catalão I carbonatite complex is used. Catalão I is part of the Alto Paranaíba igneous province in the Goias Province...
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Journal Article
Published: 01 September 1981
Journal of the Geological Society (1981) 138 (5): 541–548.
...C. J. N. Fletcher; M. Litherland Abstract The Velasco Alkaline Province of Mesozoic age is situated near to the Bolivian-Brazilian border, and is enclosed in Precambrian gneisses of the Brazilian Shield. It consists of an early volcanic suite, and a series of 14 interfering circular, ring...