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Petrology of Birimian granitoids in southern Ghana ...

The Paleoproterozoic Birimian terrane consists of volcanic and sedimentary rocks occurring in greenstone belts and metasedimentary basins that have been intruded by two generations of granitoids. The Birimian terrane comprises a large part of the West African craton. It formed during a period of extensive juvenile magmatism that led to the

Geodynamic setting of the Birimian volcanism in central ...

The greenstone belt rocks have a magmatic signature of ocean floor tholeiites. They were generated from moderate partial melting of a fairly depleted spinel lherzolite source. The rhyodacites show the same compositions as the TTG granitoids of the belt. ... A review of lithostratigraphic and chronological data of the Birimian terrains leads us ...

Geochemistry of an ultramafic-rodingite rock association …

2020-1-7 · the Birimian greenstone belts typically contain significant andesitic–dacitic pyroclastic rocks, as do the metasedimen-tary belts which contain significant thicknesses of volcano-genic sediments including fine-grained fragmental volcanic rocks. Chemical sediments composed of manganesestones and chert are interstratified with the Birimian ...

The geology of the Taparko gold deposit, Birimian ...

The Taparko gold deposit, located in the eastern branch of the Proterozoic Birimian Bouroum-Yalogo greenstone belt (Burkina Faso) consists of a network of quartz veins developed in a N 170° trending shear zone (250 m wide, 4 km long) superimposed on the regional Birimian structural pattern. The quartz vein network is composed of: (a) a dominant array of quartz …

Lithostratigraphy and Composition of 2.1 Ga Greenstone ...

2020-8-30 · We have determined the lithostratigraphy of three, Early Proterozoic (~2.1 Ga), Birimian greenstone belts in the West African craton and measured the concentrations of major and trace elements in samples of volcanic rocks from those belts.

(PDF) The Guibare and Fete Kole gold-bearing tourmaline ...

The Guibare and Fete Kole deposits in Burkina Faso consist of Birimian gold-bearing quartz and tourmaline veins in metamorphosed volcano-sedimentary formations of an Early Proterozoic greenstone belt.

Greenstone Belts: World-class Gold Deposits | INN

2019-10-22 · Greenstone belts host economic deposits of many minerals, including silver, copper and zinc, but they are best known for holding gold. Archaean-age greenstone belts in particular tend to host rich ...

Zircon Trace Element Constraints on the Evolution of the ...

2017-6-12 · According to Davis et al. (1994), the Birimian rocks were formed during the Eburnean orogeny, which is a Paleoproterozoic juvenile crust-forming event. The Paleoproterozoic Birimian terrane in Ghana comprises six volcanic greenstone belts with four sedimentary basins occurring between each pair of belts.

A Paleoproterozoic ultramafic-mafic assemblage and ...

2010-3-29 · The Loraboue´ Birimian ultramafic-mafic assemblage, located in the Boromo greenstone belt (Burkina Faso), is interpreted as the remains of a magma chamber that crystallized at the base of an island arc. The ultramafic rocks exhibit an heteradcumulate texture, being generally made up of wehrlites and more rarely dunites. The crystallization

The Birimian Greenstone Belts of West Africa

The Birimian Greenstone Belts of West Africa. July 2013 The country we were to visit was Burkina Faso, a small country about the same size of my home state of Nevada with about 10 times more people. The second day I was in Africa, we went out to the goldfields for the first time.

2020-5-8 · (Birimian greenstone belt)1,030。,(Mbengue)(Eburnea)。

Mineralogical and petrochemical characterization of ...

2017-7-8 · birimian greenstone belts. They generally correspond to pyroxenolites, websterites, lherzolites (Ouédraogo 1985, Zonou 1982), pargasite clino-pyroxenolites and cortlandites or brown hornblende peridotites (Wenmenga 1986), ortho-amphibolites (Koala 1980), wherlites, dunites (Béziat et al. 2000) and serpentinites (Sawadogo 1983).

Lower Proterozic Birimian ''Greenstone belt'' of 2. Sources ...

Lower Proterozic Birimian ''Greenstone belt'' of West Africa and sources of Manganese mineralization in Ghana George M. Tetteh (University of Mines and Technology, P. O. Box 237, Tarkwa. Ghana), Frank K. Nyame (Dept. of Geology, University of Ghana) 1. Introduction At the eastern flank of the West African craton are Palaeoproterozoic rocks,

Structural Control of Auriferous Mineralization in the ...

2017-2-21 · birimian belts and the associated gold mineralizations. The major contributions includes: 1) the precision of the nature of birimian greenstone belts in an area of deep superficial coverage; 2) the highlighting of structural factors controlling mineralizations of Agbahou.

Genesis of chemical sediments in Birimian greenstone …

1995-6-1 · In the Birimian (Early Proterozoic) greenstone belts of Ghana, manganese mineralization is widespread (Kesse, 1976), but to date no detailed mineralogical or petrological work has been done on them. One exception is the world-class manganese deposit of Nsuta with reserves of 5 million tonnes of oxide ore containing 48.9 % Mn and 28 million ...

Gold in Birrimian greenstone belts of Burkina Faso, West ...

The belts consist of steeply dipping volcanic and volcano-sedimentary units intruded by Eburnean granitoids (ca. 2,000 m.y.), all of which have undergone incipient to low greenschist facies metamorphism.Many former gold prospects and mines are known from both greenstone belts, including the Poura vein gold deposit, the Dossi shear zone ...

Birimian lithological succession and structural evolution ...

The greenstone belts of northeast Burkina Faso in the West African Craton (WAC) comprise Birimian meta-sedimentary and mafic-ultramafic complexes that …

Exploring West Africa''s Birimian Greenstone Belt

The Birimian Greenstone Belts of West Africa - June 2013 ...

Reconstructed Oceanic Sedimentary Sequence in the Cape ...

The Birimian greenstone belt likely formed through collision between the West African and Congo Cratons ~2.2 Ga. Accreted greenstone belts that formed through collision especially during the Palaeoproterozoic are usually not only good targets for preservation of oceanic sedimentary sequences but also greatly help understand the nature of the Paleoproterozoic deeper oceanic …

Birimian lithological succession and structural evolution ...

2004-5-1 · The Boromo–Goren Greenstone Belt (BGGB) of Burkina Faso forms part of the Palaeoproterozoic Birimian Domain of the West African Craton. The Goren segment of this greenstone belt trends SE across the Yatenga, Bam, and Sanmatenga districts of Burkina Faso for a distance of approximately 140 km, and constitutes an arcuate extension to the …

Origin of an unusual fluid composition in Early ...

2021-2-20 · Birimian volcanic belts are similar to those of Archaean greenstone belts (e.g. Abouchami et al., 1990; Sylvester & Attoh, 1992). Many authors, therefore, consider them to be . 406 § 10 ° N GTI 2 ~ 3 -CJ 4 5 D GOLD MINE 0 200km Figure 1 Geological map of West Africa illustrating the distribution ...

Lithostratigraphy and Composition of 2.1 Ga Greenstone ...

Three Birimian greenstone belts located in Ghana and shown in figure 1, Nangodi (belt 1), Winneba (belt 2), and Dixcove (belt 3), were sam-pled for chemical analyses in this study. For each belt, our field studies and published reports provide some control on their stratigraphy, unlike other Birimian belts, for which there is little strati-

Petrology And Geochemistry Of The K-Rich Granitoids In …

ABSTRACT. The Paleoproterozoic Birimian province of Ghana is made up basically of parallel and equally spaced NE-SW trending greenstone belts (with the exception of one which trends N-S), one of which is the Bole-Nangodi belt which outcrops in the northern parts of Ghana.

Tarkwaian Deposits of the Birimian Belt of Houndé ...

2016-5-23 · The Birimian basement is composed of volcanic and volcano-sedimentary rocks belts that are intruded by small ultrabasic to basic plutons and by wide masses of Eburnean granitoids. These greenstone belts form elongated strips towards the N-S or N-NNE-SSW direction extending into neighboring territories.

Genesis of chemical sediments in Birimian greenstone …

Genesis of chemical sediments in Birimian greenstone belts: evidence from gondites and related manganese-bearing rocks from northern Ghana* FRANK MELCHER Institute of Geological Sciences, Mining University, A-8700 Leoben, Austria Abstract

Genesis of chemical sediments in Birimian greenstone …

Genesis of chemical sediments in Birimian greenstone belts: evidence from gondites and related manganese-bearing rocks from Northern Ghana - Volume 59 Issue 395

Lithological architecture and petrography of the Mako ...

2017-7-1 · The Birimian greenstone belts are mainly constituted of bimodal volcanic rocks with tholeiitic ultramafic-mafic complex overlapped by calc-alkaline intermediate-felsic complex, both intruded by tonalite-trondhjemite-granodiorite (TTG) plutons (Dia et al., 1997, Pouclet et al., 2006, Attoh et al., 2006, Dampare et al., 2008, Delor et al., 2010 ...

Ultramafic rocks of the Paleoproterozoic greenstone belt ...

2019-3-15 · Akwatia in the Birimian greenstone belt of Ghana. This might point to a regionally extensive diamond belt in the Guiana Shield and its pre-drift counterpart in the West-African Craton. • The ultramafic rocks of Suriname are one of the least investigated, but economically most promising rocks in the Paleoproterozoic greenstone belt.

Exploring West Africa''s Birimian Greenstone Belt

The Birimian Greenstone Belts of West Africa. June 2013 by Chris. A few years ago I had a tremendous opportunity to visit Australia and hunt for gold there. The geology of the gold deposits there was somewhat different from what I was used to here in the US. I learned a lot about greenstone belt gold deposits while prospecting them in person ...

Geochemical constraints on provenance and source area ...

2020-8-28 · The Birimian Supergroup in Ghana consists of nar-row sedimentary basins that trend northeasterly as well as linear greenstone belts consisting mainly of volcanic, volcaniclastic to clastic series. Both the sedi-mentary basins and the greenstone belts (one of which is the Lawra belt – the study area) are intruded

Origins of Birimian (ca 2.2 Ga) mafic magmatism and the ...

2013-10-21 · Abstract The Birimian of the West African Craton is an important repository of Paleoproterozoic mafic magmatism, ... Origins of B irimian (ca 2.2 G a) mafic magmatism and the P aleoproterozoic ''greenstone belt'' metallogeny: a review Frank K. Nyame. E-mail address: [email protected] .gh.