Archaean lode gold deposits in Africa: Crustal setting, metallogenesis and cratonization

Foster, R. P.; Piper, D.P.

doi:10.1016/0169-1368(93)90021-p

Cited by 48 publications

(32 citation statements)

References 50 publications

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“…Several deposits are associated with sulphidised brittle-ductile shear zones, including gold in sheeted and stockwork quartz veins, copper as malachite in buck quartz veins, and tourmaline and topaz in pegmatite and buck quartz veins (Foster and Piper, 1993;Lompo, 2001;Castaing et al, 2003). Foster and Piper (1993), Béziat et al (2008) have restricted gold mineralization in the West African Craton to the Eburnean tectono-thermal event, but this does not include gold hosted by Tarkwa Group meta-sedimentary units in Ghana Feybesse et al, 2006). Bossière et al (1996) concluded that the Tarkwa Group meta-sedimentary units in the study area have no economic value.…”

Section: Geological Settingmentioning

confidence: 97%

The Markoye Shear Zone in NE Burkina Faso

Tshibubudze

Hein

Marquis³

2009

Journal of African Earth Sciences

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Section: Geological Settingmentioning

confidence: 97%

The Markoye Shear Zone in NE Burkina Faso

Tshibubudze

Hein

Marquis³

2009

Journal of African Earth Sciences

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“…Plan géologique et stéréogrammes des éléments structuraux de l'indice "Mariposite" 32 FIGURE 7. Photomicrographies du matériel bréchique associé à la faille "sud" à l'indice "Mariposite" 37 (Roberts 1987;Colvine et al 1988;Card et al 1989;Foster 1989;Groves et al 1989;Groves et Foster 1991;Foster et Piper 1993;Hodgson 1990Hodgson , 1993Robert 1995) ont mis en évidence un ensemble de caractéristiques communes à la plupart de ces gisements à travers le monde. Il ressort que la plupart des gisements hydrothermaux d'or archéens sont spatialement associés avec des failles d'échelle crustale et qu'ils se trouvent à l'intérieur ou en bordure des ceintures de roches vertes métamorphisées au faciès des schistes verts jusqu'au faciès des amphibolites.…”

Section: Resumeunclassified

Caractéristiques, chronologie et typologie des minéralisations aurifères de la région du Lac Shortt (Québec), sous-province archéenne de l'Abitibi /

Brisson¹

1998

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“…Similar structurallycontrolled gold mineralisation is found within the Archaean greenstone belts of Sierra Leone; the gold mineralisation appears to have formed at somewhat higher pressure than that in other greenstone belts worldwide (Barrie and Touret, 1999). The timing of gold mineralisation is not well known, but is generally considered to be late Archaean, potentially associated with the c. 2800 Ma granitoid intrusions that occur throughout the Kénéma-Man domain (Foster and Piper, 1993).…”

Section: Placer Gold Depositsmentioning

confidence: 93%

“…The mineralisation, which may comprise quartz veins, breccia zones, stringers and disseminations, typically extends over widths of 10-20 m and may have a strike extent of more than a kilometre. Structure exerts a strong control on its distribution with north-easttrending zones of intense shearing being particularly important (Foster and Piper, 1993). Other favourable sites include zones of polyphase deformation, fold limbs and closures, and competency contrasts such as sheared lithological contacts.…”

Section: Placer Gold Depositsmentioning

confidence: 99%

A review of the mineral potential of Liberia

Gunn

Dorbor

Mankelow

et al. 2018

Ore Geology Reviews

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The Republic of Liberia in West Africa is underlain mostly by Precambrian rocks of Archaean (Liberian) age in the west and of Proterozoic (Eburnean) age in the east. By analogy with similar terranes elsewhere in the world, and in West Africa in particular, the geology of Liberia is favourable for the occurrence of deposits of a wide range of metals and industrial minerals, including gold, iron ore, diamonds, base metals, bauxite, manganese, fluorspar, kyanite and phosphate.Known gold deposits, mostly orogenic in style, occur widely and are commonly associated with north-easttrending regional shear zones. Gold mining commenced at the New Liberty deposit in western Liberia in 2015, while significant gold resources have also been identified at several other sites in both Archaean and Proterozoic terranes. Liberia has large resources of itabirite-type iron ores, most of which are located in the Liberian terrane, and was the largest producer in Africa prior to the onset of civil war in 1989. Production of iron ore is currently restricted to a single mine, Yekepa, in the Nimba Range. Other important deposits, some of them previously mined, include Bong, the Western Cluster, Putu and Goe Fantro. There is a long history of alluvial diamond production in western and central Liberia, together with more than 160 known occurrences of kimberlite. Most of the known kimberlites occur in three clusters of small pipes and abundant dykes, located at Kumgbor, Mano Godua and Weasua, close to the border with Sierra Leone. Many of these are considered to be part of a single province that includes Jurassic age diamondiferous kimberlites in Sierra Leone and Guinea.Deposits and occurrences of a wide range of other metals and industrial minerals are also known. Several of these have been worked on a small scale in the past, mainly by artisanal miners, but most are poorly known in detail with sub-surface information available at only a few localities. By comparison with most other countries in West Africa, the geology of Liberia is poorly known and there has been very little systematic exploration carried out for most commodities other than gold, iron ore and diamonds since the 1960s and 1970s. Further detailed field and laboratory investigations using modern techniques are required to properly evaluate the potential for the occurrence of economic deposits of many minerals and metals in a variety of geological settings. Digital geological, geochemical, geophysical and mineral occurrence datasets, including new national airborne geophysical survey data, provide a sound basis for the identification of new exploration targets, but in almost every part of the country there is a need for new and more detailed geological surveys to underpin mineral exploration.

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Archaean lode gold deposits in Africa: Crustal setting, metallogenesis and cratonization

Cited by 48 publications

References 50 publications

The Markoye Shear Zone in NE Burkina Faso

The Markoye Shear Zone in NE Burkina Faso

Caractéristiques, chronologie et typologie des minéralisations aurifères de la région du Lac Shortt (Québec), sous-province archéenne de l'Abitibi /

A review of the mineral potential of Liberia

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