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Birimian
The Birimian rocks are major sources of gold and diamonds that extend through Ghana, Côte d'Ivoire, Guinea, Mali and Burkina Faso. They are named after the Birim River, one of the main tributaries of the Pra River in Ghana and the country's most important diamond-producing area. Ghana and Mali are the second and third largest producers of gold in Africa, respectively. The Birimian terranes in the southern part of the West African craton are a mix of metamorphosed volcanic, sedimentary, and plutonic rocks and low-grade metavolcanics and metasediments. Almost half of the terranes consist of alkaline granites. The rocks formed over a period of about 50 million years between 2.200 Ga and 2.100 Ga years ago. Location The Birimian rocks stretch across the countries to the north of the Gulf of Guinea, forming parallel belts that generally trend northeasterly and are wide and about apart. They consist of interlayered sedimentary and volcanic flow rocks metamorphosed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birim River
The Birim River is one of the main tributaries of the Pra River in Ghana and the country's most important diamond-producing area, flowing through most of the width of the Eastern region. The river rises in the east of the Atewa Range, flows north through the gap between this range and the Kwahu Plateau, then runs roughly south-west until it joins the Pra. It gives its name to the Birimian rock formation, which yields most of the gold in the region. Ghana is the second largest producer of gold in Africa. Geology The Birim River basin lies in the Man Shield area of the West African craton, which has been overlaid by Early Proterozoic metasedimentary Birimian rocks. These rocks appear to have originated in mid-oceanic arcs of volcanoes, which formed a crust that collided with and rode over the Man shield portion of the West African Craton and was compressed to form a series of folds generally trending northeasterly. The Birimian rocks include Akwatian formations, named after the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Man Shield
The Man Shield (Leo-Man Shield or Leo-Man Craton) is a geological shield or craton in the southeast portion of the West African Craton. The shield is in part overlaid by gold-bearing Birimian formations. Geography and Geology The shield covers the countries Ivory Coast, Mali, Burkina Faso, Ghana, Sierra Leone, Liberia, and Guinea.Jessell M.W., Liégeois J-P. (2015). "100 years of research on the West African Craton". ''Journal of African Earth Sciences''. 112(B): 377– 381. this shield, a large portion of the WAC consists of Paleoproterozoic Birimian continent margins.Ennih N. & Liégeois J-P. (2008). ''The Boundaries of the West African Craton''. Geological Society, London, Special Publications. 297: 1–17. The Birimian units were initially produced in an immature volcanic arc setting, which was later metamorphosed during the Eburnean orogeny. The poor exposure of the greenstone belt in the area limits interpretations of a broad structural c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West African Craton
The West African Craton (WAC) is one of the five cratons of the Precambrian basement rock of Africa that make up the African Plate, the others being the Kalahari craton, Congo craton, Saharan Metacraton and Tanzania Craton.Jessell M.W., Liégeois J-P. (2015). "100 years of research on the West African Craton". ''Journal of African Earth Sciences''. 112(B): 377– 381. Cratons themselves are tectonically inactive, but can occur near active margins,Ennih N. & Liégeois J-P. (2008). ''The Boundaries of the West African Craton''. Geological Society, London, Special Publications. 297: 1–17. with the WAC extending across 14 countries in Western Africa, coming together in the late Precambrian and early Palaeozoic eras to form the African continent. It consists of two Archean centers juxtaposed against multiple Paleoproterozoic domains made of greenstone belts, sedimentary basins, regional granitoid- tonalite-trondhjemite-granodiorite (TTG) plutons, and large shear zones. The craton ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarkwa, Ghana
Tarkwa is a town and is the capital of Tarkwa-Nsuaem Municipal district, a district in the Western Region southwest of South Ghana. Tarkwa has a 2013 settlement population of 34,941 people. Economy Mining Tarkwa is noted as a centre of gold mining and manganese mining. Tarkwa Mine, which is a large open-cast gold mine, is situated to the northwest of the town, and Nsuta manganese mine is situated to the east of the town. Tarkwa Mine mines several low-grade conglomeratic "reefs" of Tarkwaian type. These reefs are of mid-Proterozoic age. A number of mining companies cluster between the villages of Aboso and Tamso in the late 19th century. Tarkwa Mine has the distinction of being one of the largest gold mines in South Ghana. Approximately 24 tons of gold is produced annually, and 100 million tons of earth is moved to achieve this production rate. The Iduapriem Gold Mine is also located near Tarkwa, 10 km south of the town. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf Of Guinea
The Gulf of Guinea is the northeasternmost part of the tropical Atlantic Ocean from Cape Lopez in Gabon, north and west to Cape Palmas in Liberia. The intersection of the Equator and Prime Meridian (zero degrees latitude and longitude) is in the gulf. Among the many rivers that drain into the Gulf of Guinea are the Niger and the Volta. The coastline on the gulf includes the Bight of Benin and the Bight of Bonny. Name The origin of the name Guinea is thought to be an area in the region, although the specifics are disputed. Bovill (1995) gives a thorough description: The name " Guinea" was also applied to south coast of West Africa, north of the Gulf of Guinea, which became known as "Upper Guinea", and the west coast of Southern Africa, to the east, which became known as "Lower Guinea". The name "Guinea" is still attached to the names of three countries in Africa: Guinea, Guinea-Bissau, and Equatorial Guinea, as well as New Guinea in Melanesia. Geography The main river ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craton
A craton (, , or ; from grc-gre, κράτος "strength") is an old and stable part of the continental lithosphere, which consists of Earth's two topmost layers, the crust and the uppermost mantle. Having often survived cycles of merging and rifting of continents, cratons are generally found in the interiors of tectonic plates; the exceptions occur where geologically recent rifting events have separated cratons and created passive margins along their edges. Cratons are characteristically composed of ancient crystalline basement rock, which may be covered by younger sedimentary rock. They have a thick crust and deep lithospheric roots that extend as much as several hundred kilometres into Earth's mantle. Terminology The term ''craton'' is used to distinguish the stable portion of the continental crust from regions that are more geologically active and unstable. Cratons are composed of two layers: A continental '' shield'', in which the basement rock crops out at the surfa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archean
The Archean Eon ( , also spelled Archaean or Archæan) is the second of four geologic eons of Earth's history, representing the time from . The Archean was preceded by the Hadean Eon and followed by the Proterozoic. The Earth during the Archean was mostly a water world: there was continental crust, but much of it was under an ocean deeper than today's ocean. Except for some trace minerals, today's oldest continental crust dates back to the Archean. Much of the geological detail of the Archean has been destroyed by subsequent activity. The earliest known life started in the Archean. Life was simple throughout the Archean, mostly represented by shallow-water microbial mats called stromatolites, and the atmosphere lacked free oxygen. Etymology and changes in classification The word ''Archean'' comes from the Greek word (), meaning 'beginning, origin'. It was first used in 1872, when it meant 'of the earliest geological age'. Before the Hadean Eon was recognized, the Arc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaya, Burkina Faso
Kaya is the fifth largest city in Burkina Faso, lying northeast of Ouagadougou, to which it is connected by railway. It is a centre for weaving and tanning. Kaya is the capital of Sanmatenga Province. It is located from Ouagadougou, the capital of Burkina Faso. Demographics Kaya has a population of 121,970 (2019 census). Population growth: Infrastructure Kaya Airport is a public airport in Kaya. As of 2014 it did not have any scheduled commercial flights. In 1988 Kaya was connected by railway to OuagadougouHistorical Dictionary of Burkina Faso, by Lawrence Rupley, Lamissa Bangali, Boureima Diamitani, 2013, third edition, Scarecrow Press, Inc. but, as of 2014, there were no passenger services available. Kaya is a road junction for the N3 and N15 national highways that link the city with Dori, Ouagadougou and Pouytenga, Boulsa, Kongoussi and Ouahigouya, respectively. Education *technical college for girls *secondary school Climate Köppen-Geiger climate clas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ouahigouya
Ouahigouya is a town in northern Burkina Faso. It is the capital of the Yatenga Province and one of its subdivisions the Ouahigouya Department. It is also the biggest town in the Nord Region. It is the fourth largest city in the country with a population of 124,587 (2019) and is situated north-west of Ouagadougou. The city itself has a stadium, a private non-profit Paediatric Hospital with 36 beds for giving birth and 24 beds for children suffering of severe malnutrition, a post office with internet access and at least one Ecobank bank branch. History The city was founded in 1757 as the capital of Yatenga one of a number of Mossi Kingdoms. The city still bears testimony to its role as capital of the Yatenga Kingdom in its name, the meaning of which is ''come and prostrate yourselves''. In the Christmas War of 1985, the city's marketplace was bombed by Malian forces, almost 100 people being killed. Economy Mainly of an agriculturally based economy, Ouahigouya also has s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boromo
Boromo is a town in the Boromo Department of Balé Province in Burkina Faso. It is the capital of both the department and the province, and it has a population of 20,193 (2019). Boromo is located directly between the two major cities of Burkina Faso, Ouagadougou and Bobo-Dioulasso. It is a city with many natural resources, including gold and fish. The major activity in this zone is agriculture. Boromo is a " melting pot" where you will find many ethnic groups, including Mossi, Dioula, Dafing, Bobo and Winiens (or Kos). See also * 2008 Burkina Faso bus crash * Railway stations in Burkina Faso A train station, railway station, railroad station or depot is a railway facility where trains stop to load or unload passengers, freight or both. It generally consists of at least one platform, one track and a station building providing such ... References External links Satellite map at Maplandia.comBBC article about the 2008 road crash Populated places in the Bouc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poura
Poura is a town in the Poura Department of Balé Province in southern Burkina Faso Burkina Faso (, ; , ff, 𞤄𞤵𞤪𞤳𞤭𞤲𞤢 𞤊𞤢𞤧𞤮, italic=no) is a landlocked country in West Africa with an area of , bordered by Mali to the northwest, Niger to the northeast, Benin to the southeast, Togo and Ghana t .... The town has a population of 6,266 and is the capital of Poura Department. References External links Satellite map at Maplandia.com [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Houndé
Houndé is a city located in the province of Tuy (of which it is the capital) in the Hauts-Bassins Region of Burkina Faso. It is situated about 100 km east by northeast of Bobo-Dioulasso along the trunk road Route nationale N1 to Ouagadougou Ouagadougou ( , , ) is the capital and largest city of Burkina Faso and the administrative, communications, cultural, and economic centre of the nation. It is also the country's largest city, with a population of 2,415,266 in 2019. The city's .... References Populated places in the Hauts-Bassins Region {{Tuy-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
