Gold metallogeny in the Birimian craton of Burkina Faso (West Africa)

Béziat, Didier; Dubois, Michel; Debat, Pierre; Nikiéma, Serge; Salvi, Stefano; Tollon, Francis

doi:10.1016/j.jafrearsci.2007.09.017

Cited by 89 publications

(47 citation statements)

References 53 publications

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“…Gold mineralization in southern Mali is located within Birimian rocks of the Baoulé-Mossi domain, which also hosts the well-known Ghanaian gold provinces (e.g., Oberthür et al 1994;Allibone et al 2002a, b;Berge 2011), as well as gold mineralization throughout Burkina Faso (Klemd and Ott 1997;Béziat et al 2008) and eastern and central Côte d'Ivoire (Coulibaly et al 2008;Kadio et al 2010). The Birimian geology of southern Mali comprises three volcanicsedimentary belts with adjacent sedimentary basins (Fig.…”

Section: Mali South Goldfieldsmentioning

confidence: 99%

“…Conversely, Yalea-type deposits (Yalea and satellite ore bodies along the Yalea Trend) have a more typical Birimian orogenic gold ore mineralogy, wall-rock alteration, and ore fluid characteristics (cf. Milési et al 1992;Allibone et al 2002a, b;Béziat et al 2008). These latter ore bodies: (1) are As-rich; (2) lack a REE-base metal enrichment; (3) have alteration assemblages dominated by quartz-carbonatealbite and sericite-chlorite (tourmaline-absent); and (4) lack brines in fluid inclusions.…”

Section: Loulo-gounkoto Ore Geneticmentioning

confidence: 99%

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A Review of Gold Mineralization in Mali

Lawrence

Lambert-Smith²,

Treloar³

2016

Mineral Deposits of North Africa

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Economic gold mineralization in Mali is confined to two terranes of Birimian-aged (Paleoproterozoic) rocks in the south and south-west of the country. The West Mali gold belt, along the border with Senegal, hosts two world-class orogenic gold districts (>5 Moz of Au mined or in reserve): the Loulo-Gounkoto and Sadiola-Yatela complexes. This gold province is hosted within greenschist metamorphosed siliciclastic and carbonate sedimentary rocks along the eastern side of the Kédougou-Ké-niéba inlier, with mineralization linked to higher-order shears and folds related to the Senegal-Mali Shear Zone. Gold deposits within the West Mali gold belt show many features typical of orogenic gold mineralization, such as geological setting (accretionary orogen), late-orogenic timing (strike-slip deformation; post peak metamorphism), structural paragenesis, and deposit geometry (steep, tabular ore bodies). However, alteration assemblages (tourmalinization, silica-carbonate, sericite-chlorite-biotite, calc-silicate) and ore fluid compositions (carbonic-rich and high-salinity aqueous-rich fluids) are highly variable along the belt. Fluid inclusion and stable isotope studies have shown that this variability is caused by multi-fluid sources, with magmatic, evaporitic and regional metamorphic fluids all likely contributing to gold mineralization within the region. Supergene enrichment of the orogenic gold lodes is economically important in the northern parts of the West Mali gold belt, involving karstification of mineralized limestones. In addition to orogenic gold deposits, other styles of gold mineralization have been reported within the Birimian crust of West Africa. The Morila gold deposit, in southern Mali,

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Section: Mali South Goldfieldsmentioning

confidence: 99%

Section: Loulo-gounkoto Ore Geneticmentioning

confidence: 99%

A Review of Gold Mineralization in Mali

Lawrence

Lambert-Smith²,

Treloar³

2016

Mineral Deposits of North Africa

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“…On Djarkadougou bore gold mineralization is hosted in greenstone sheared and hydrothermally. Beziat et al 2008 about metallogeny of gold in Burkina Faso, attributed this type of mineralization to ductile shear D1 phases.…”

Section: Relations Between Deformation and Mineralizationmentioning

confidence: 99%

“…Milesi et al, 1989 in his study of mineralization in West Africa stressed that the brittle-ductile character and greenschist facies metamorphism are factors favorable to the development of the orogenic gold mineralization. Several authors working on gold mineralization in Burkina-Faso (Beziat & al.,2008) related them to D2 transcurrent shear zones oriented in following the NE-SW trending. After these authors, the abundance of gold-bearing quartz veinlets in Djarkadougou prospect would be the product of D2 Events.…”

Section: Relations Between Deformation and Mineralizationmentioning

confidence: 99%

Lithostructural and Petrochemical Survey of Djarkadougou Gold Prospect (South West Burkina Faso / West Africa)

Koffi¹,

Djro²,

Wenmenga³

2017

ESR

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The Djarkadougou gold prospect is located on the Birimian greenstone belt of the Houndé exploration permit held by the company Orezone Inc. The permit is at 275 km far from the capital Ouagadougou south-western Burkina Faso, West Africa. This area is based on sheared and metamorphosed greenschist facies rocks. Metamorphism locally reaches to the amphibolite facies around intrusions. There are two major lithological units whose interface is marked by a NW-SE trending shear corridor: an unit of andesite-basaltic rocks of andesitic breccias in the East and volcaniclastic and sedimentary unit composed flows, tuffs and felsic to mafic breccia, interbedded volcano-sedimentary rocks. All this together is intruded by plutonic rocks, and various felsic to mafic dykes. These rocks have undergone ductile to brittle heterogeneous deformations and hydrothermal alteration sericite ±carbonate ±quartz±sulphide within deformation corridors. The rocks of the East and West domains affected by three phases of brittle-ductile deformation (D1, D2, and D3) and the meteoric alteration is systematic in superficial facies of Djarakadougou core drilling.Geochemical analysis shows a tholeiitic to calc-alkaline volcanic serie characteristic a bimodal volcanism. The spectra of normalized REE chondrites are generally flat and constant reminding those of N-MORB basalt. The chemical compositions of andesite and basalt are deferred on several discrimination diagrams especially Th / Yb -Nb / Yb and 2 Nb -Zr / 4 -Y show that andesites and basalts of the prospect are issued in geotectonic setting of volcanism preponderant arc.

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“…To know the origin of magnetic anomalies, its extension and its amplitude being a major structural element requires in-depth study of the electrical properties of the crust of the surrounding basin [22], and the fractional anomaly separation procedure are the important methods and techniques [23]. However, all primary gold deposit, prospects and showings that we studied in West Africa can be classified as orogenic type gold deposits [24].…”

Section: Maps International Journal Of Geosciencesmentioning

confidence: 99%

Integrated Interpretation of Geophysical and Soil Geochemical Anomalies in Gold Exploration: Case of Kouremale, Southern Mali-West Africa

Tounkara¹,

Chen²,

Keita³

2017

IJG

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Detecting the anomalies' sources location in the vast territory such as Kouremale area is a grand challenge for geophysicists because there is a need to assess gold deposit. Therefore, this paper aims to recommend a methodological approach on applied magnetic survey and soil geochemistry to identify the location of anomalies' sources. To that aim the study is divided into phases. In the first phase, the maps for integrated interpretation have been produced by Geosoft Oasis and ArcGIS 10.2.1. The corrected and processed magnetic data with eliminated diurnal variation have been used. Phase two consist of integrate geochemical soil map. The results of phase one identified four magnetic anomalies zones (MAZ) with their coordinates. Thus, the obtained radiometric map, showed that there is a high intensity of K and Th compared to U, which indicates a significant weathering process and there are many saprolithes in study area. The findings of phase two revealed that there is a high concentration of gold content (1500 ppm) with an average concentration of 92 ppm. The integrated interpretation map coming from the combined different maps, referring to the geological information verified on the field, led to conclude that, the target B is the best gold anomaly. The delimitation of the space of the target B from the geophysical and geochemical information confirmed the existence of limited, restricted and potential anomaly.

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Gold metallogeny in the Birimian craton of Burkina Faso (West Africa)

Cited by 89 publications

References 53 publications

A Review of Gold Mineralization in Mali

A Review of Gold Mineralization in Mali

Lithostructural and Petrochemical Survey of Djarkadougou Gold Prospect (South West Burkina Faso / West Africa)

Integrated Interpretation of Geophysical and Soil Geochemical Anomalies in Gold Exploration: Case of Kouremale, Southern Mali-West Africa

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