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The Palaeoarchaean Barberton Greenstone Belt is situated in the eastern part of the Kaapvaal craton, southern Africa (Fig. 7.1).Its ca. 3550–3220 Ma volcano-sedimentary succession, which forms the Barberton Supergroup (formerly Swaziland Supergroup), is preserved in a southwest-northeast-trending belt surrounded by …
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In this paper the term 'greenstone belt' is used specifically to describe deformed and metamorphosed volcano-sedimentary successions, generally enveloped by granitic and gneissic rocks, and confined to the Archaean, which ranges in age from the Eoarchaean (>3600 Ma) to the Neoarchaean ( ca. 2500 Ma).
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R. T. RANGANAI 1049 ments during some form of subduction-accretion [5,18- 20]. The regional and structural interpretation used for the Filabusi belt model [11], and the other models, lacks
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The best-preserved successions, according to Raman geothermometry, are situated in the Bulawayo and Belingwe greenstone belts where they have been subjected to lower greenschist facies ...
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The major greenstone belts of the world Canada's Abitibi greenstone belt is by far the largest and best known of its kind. Formed over 2.6 billion years ago, the belt has to date produced over 200 ...
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: Three major gold deposits, Matandani, Kukuluma and Area 3, host several Moz of gold, 18 along a ~5 km long, WNW trend in the E part of the Geita Greenstone Belt, NW Tanzania. The 19 deposits are hosted in Archaean volcanoclastic sediment and intrusive diorite. The geological 20 evolution of the deposits involved three separate stages: (1) …
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We work with komatiites from the Alexo and Pyke Hill areas of the Abitibi greenstone belt (Arndt, 1986; Lahaye and Arndt, 1996; Puchtel et al., 2004; Fan and Kerrich, 1997; Sproule et al., 2002 ...
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The Belingwe belt in Zimbabwe is probably the best preserved late Archaean greenstone belt known. The basal unit that rests unconformably on upto 3.5 Ga old granitoid gneisses and Mtshingwe...
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Merwe [ 1997] on the Midlands greenstone belt (see Figure 1). Juxtaposition of tectonostratigraphic units is indicated for the Belingwe and Midlands greenstone belts (Figure 1).
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Greenstone Belt and is associated with gold deposits, notably Golden Kopje, Eldorado,Ayrshire and Muriel (Blenkinsop et al. 1996). ... •This mine was pegged by the Scottish Mashonaland Gold Mining Company in 1914, and operated it up to 1916, and was thereafter judged unviable and more or less abandoned (Chamber of Mines, 1960).
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In the Mazowe area some 40 km NW of Harare in Zimbabwe, gold mineralization is hosted in a variety of lithologies of the Archean Harare-Bindura-Shamva greenstone belt, in structures related to the ...
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The geology of the belt is described Antimony and gold mineralization is confined to the siliceous fuchsitic and cherty zones in the carbonate schists It is situated in the Gwanda Greenstone Belt which stretches 80km in an eastwest direction The belt primarily contains basaltic rocks with minor felsic and ultramafic units Gold mineralisation at ...
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Neoarchaean greenstone belts of the Zimbabwe craton host microbialite-bearing limestone successions that range in age from ~2.82 to 2.68 Ga. The best-preserved successions, according to Raman geothermometry, are situated in the Bulawayo and Belingwe greenstone belts where they have been subjected to lower greenschist …
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Equinox Gold completed its acquisition of Orion's 40% interest and consolidated ownership of the Greenstone Mine and the Kenogamisis, Brookbank and Viper Properties into Equinox Gold.. Located in the Geraldton-Beardmore Greenstone Belt in Ontario, Canada, the properties are made up of several claim groups having a cumulative strike …
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The Mutare Greenstone Belt is defined here as stretching from the Odzi River in the west right to the Mozambique border in the east. The Mutare Greenstone Belt is an east-west trending synclinorium of ultramafic, mafic and banded-iron formations corresponding to the Bulawayan Group.
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The Centennial Field Excursion to the Belingwe Greenstone Belt and the Great Dyke, Led by Dr. Tony Martin, 23rd – 25th October 2010 ... This was achieved, and we headed south out of town, past the Shabanie asbestos mine and the Sabi gold mine, to arrive at the famous, much visited Type-Section for the Manjeri Formation at the …
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The Neoarchaean Belingwe greenstone belt of the Zimbabwe craton consists of a well-preserved succession of rocks of low metamorphic grade and low strain. We present new age constraints for the Ngezi Group of the belt and …
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Compared to the Belingwe greenstone belt, which has been well mapped and studied (Bickle and Nisbet, 1993; Hofmann and Kusky, 2004; Ranganai et al.,
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The Giyani greenstone belt, formerly known as the Sutherland greenstone belt, occurs northeast of the Pietersburg greenstone belt (Fig. 17.1). It has a poorly constrained age that appears to fall between 3.5 and 2.8 Ga and contains IFs within its mostly mafic to ultramafic metavolcanic succession (Brandl et al. 2006 ; McCourt and …
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A proven gold ore reserve of 15 million tonnes is present in a greenstone belt in the Busia district under Wagagai, but the ore reserve is expected to exceed 30 million tonnes over a life of 30 years. ... A multimillion dollar large-scale gold mining and refining plant called Wagagai Mining (U) Limited is set to start operating in March 2024 …
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AbstractA.M. Macgregor (1888-1961) is remembered for his enormous contribution to geology. His maps changed the course of geological thinking in southern Africa. Following in his footsteps we examine aspects …
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ABSTRACT. The Belingwe Belt contains an andesitic suite, two suites of komatiites associated with voluminous tholeiites, and assorted intrusive igneous rocks. Some of the latter include remarkably fresh komatiite and basalt, containing little altered olivine and clinopyroxene phenocrysts and optically fresh glass.
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Geological map of the central part of the Belingwe greenstone belt (after Martin et al. 1993). The belt consists of a tight synclinal structure, and stratigraphic younging is towards the core of ...
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•Belingwe greenstone belt: popular & world-class belt, well-preserved greenstone stratigraphy (Beligwean, Bulawayan, Shamvaian Supergroups). •Constitutes type-area from which models on greenstone belt development & evolution (Kusky, 1998; Hunter et al. 1998; Hofmann & Kusky, 2004, Shumizu et al. 2005; Sawada et al. 2015; Orpen & …
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Archaean greenstone belts and associated granitic rocks comprise some of the most diverse rock types on the Earth's surface and were formed during the early stages of the development of the planet ...
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Komatiites are now recognized in many greenstone belts around the world and in some places associated with high-magnesium, high silica basalts called boninites (e.g. Angerer et al., 2013).A geographical map of komatiite occurrences globally can be found in Arndt et al. (2008).The discovery of komatiites is important as it gives a window …
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The wide isotopic ranges for δ 34 S in sulfides from −21.1‰ to +16.7‰ and for δ 13 C red in carbon-rich cherts and black shales from −43.4‰ to −7.2‰ in the Belingwe Greenstone Belt, Zimbabwe, indicate that photosynthetic microbial mat communities were well established at 2.7 Ga. In these well-preserved Late Archean …
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The Archean Superior Province of Canada contains the Abitibi greenstone belt, which contains some of the world's largest gold and copper-zinc deposits with significant amounts of nickel-copper-platinum group element (PGE) mineralization too. Discovered in 1909, the Abitibi has generated over 160 million ounces of gold. Two …
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On October 27, 2021, Equinox Gold announced groundbreaking for full-scale construction of the Greenstone Mine, with first gold pour targeted for the first half of 2024. Construction was advanced in a 60/40 joint venture between Equinox Gold (60%) and Orion Mine Finance (40%), and was effectively complete at the end of 2023. Commissioning began ...
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Section snippets Overview of the geology of Zimbabwe. The Zimbabwe craton is an approximately 500 km × 800 km Archean granite–greenstone terrain, which underlies some 70% of the country.It is bounded by several mobile belts, including the Proterozoic Zambezi in the northeast, and Mozambique in the east, the …
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