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![Photographs of drill core intervals, showing structural relationships in the Nassara deposit (modified from Ouiya et al. 2016). A. typical S2(Na) fabric in andesite (and.) and black shale (b.s.) crosscut by late D3(Na)-related barren quartz veins (black arrows). B. S3(Na) crenulation cleavage (black arrows) crosscutting sheared (S2(Na)) pyroclastics. C. Photograph of a drill core sample of black shale, showing sigmoidal and parallel veins transposed into the foliation during D2(Na). Mineralized pyrite (Py) disseminated along the foliation plane. Locally, the S2(Na) foliation is crosscut by S3(Na) microshear fractures (modified from Ouiya et al., 2016). D. Second generation pyrite (Py) is disseminated in altered andesites near quartz veins.]()
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![Simplified geologic map of the West African craton, showing locations of the main gold deposits (modified after the BRGM SIG Afrique map, Milesi et al., 2004). Gold deposits of the Baoulé-Mossi domain are indicated with stars. Nassara, Kiaka, Obuasi, Damang, and Wassa deposits are highlighted with blue stars.]()
![A. Simplified lithostructural map of southwest Burkina Faso (modified after Baratoux et al., 2015), showing the Gaoua district, and indicating the locations of both gold-only (Nassara, Gomblora) and copper-gold deposits (Mont Biri, Diénémera, and Gongondy). B. Simplified stratigraphic sequence for the study area (from Baratoux et al., 2015)]()
![A. Simplified lithostructural map of southwest Burkina Faso (modified after Baratoux et al., 2015), showing the Gaoua district, and indicating the locations of both gold-only (Nassara, Gomblora) and copper-gold deposits (Mont Biri, Diénémera, and Gongondy). B. Simplified stratigraphic sequence for the study area (from Baratoux et al., 2015)]()
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Nassara Deposit
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Image
Photographs of drill core intervals, showing structural relationships in th... Available to Purchase
in Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton
> Economic Geology
Published: 01 January 2017
Fig. 3 Photographs of drill core intervals, showing structural relationships in the Nassara deposit (modified from Ouiya et al. 2016 ). A. typical S 2(Na) fabric in andesite (and.) and black shale (b.s.) crosscut by late D 3(Na) -related barren quartz veins (black arrows). B. S 3(Na
Journal Article
Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton Available to Purchase
Journal: Economic Geology
Publisher: Society of Economic Geologists
Published: 01 January 2017
Economic Geology (2017) 112 (1): 145–168.
...Fig. 3 Photographs of drill core intervals, showing structural relationships in the Nassara deposit (modified from Ouiya et al. 2016 ). A. typical S 2(Na) fabric in andesite (and.) and black shale (b.s.) crosscut by late D 3(Na) -related barren quartz veins (black arrows). B. S 3(Na...
FIGURES
Image
Simplified geologic map of the West African craton, showing locations of th... Available to Purchase
in Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton
> Economic Geology
Published: 01 January 2017
Fig. 1 Simplified geologic map of the West African craton, showing locations of the main gold deposits (modified after the BRGM SIG Afrique map, Milesi et al., 2004 ). Gold deposits of the Baoulé-Mossi domain are indicated with stars. Nassara, Kiaka, Obuasi, Damang, and Wassa deposits
Image
A. Simplified lithostructural map of southwest Burkina Faso (modified after... Available to Purchase
in Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton
> Economic Geology
Published: 01 January 2017
Fig. 2 A. Simplified lithostructural map of southwest Burkina Faso (modified after Baratoux et al., 2015 ), showing the Gaoua district, and indicating the locations of both gold-only (Nassara, Gomblora) and copper-gold deposits (Mont Biri, Diénémera, and Gongondy). B. Simplified stratigraphic
Image
A. Simplified lithostructural map of southwest Burkina Faso (modified after... Available to Purchase
in Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton
> Economic Geology
Published: 01 January 2017
Fig. 2 A. Simplified lithostructural map of southwest Burkina Faso (modified after Baratoux et al., 2015 ), showing the Gaoua district, and indicating the locations of both gold-only (Nassara, Gomblora) and copper-gold deposits (Mont Biri, Diénémera, and Gongondy). B. Simplified stratigraphic
Journal Article
On the stratigraphical and palaeobiogeographical significance of Borelis melo melo (Fichtel & Moll, 1798) and B. melo curdica (Reichel, 1937) (Foraminifera, Miliolida, Alveolinidae) Available to Purchase
Journal: Journal of Micropalaeontology
Publisher: Geological Society of London
Published: 01 November 2006
Journal of Micropalaeontology (2006) 25 (2): 175–185.
... Iraq (Karim, 1978). Govanda Formation Hillwa Nassara village, north of Amadiya, N. Iraq (Al-Hashimi & Amer, 1985). [Euphrates and Govanda formations in Western Desert Early Miocene, probably Burdigalian, on basis of occurrence of Miogypsina globulina (Ctyroky et al ., 1975; Karim, 1978; Al...
FIGURES
Journal Article
The Paleoproterozoic Copper-Gold Deposits of the Gaoua District, Burkina Faso: Superposition of Orogenic Gold on a Porphyry Copper Occurrence? Available to Purchase
Journal: Economic Geology
Publisher: Society of Economic Geologists
Published: 01 January 2017
Economic Geology (2017) 112 (1): 99–122.
...-only deposits (Nassara, Gomblora, and Iridiaka; Baratoux et al., 2015 ; Ouiya et al., 2016 ) and copper-gold occurrences (Mont Biri, Diénémera, Bousséra, and Gongondy). The latter are located along a N-S structural corridor, along a distance of about 10 km ( Fig. 2 ). Little data are available...
FIGURES
