Geology of the great dyke of zimbabwe

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Webdike, also called dyke or geological dike, in geology, tabular or sheetlike igneous body that is often oriented vertically or steeply inclined to the bedding of preexisting intruded rocks; similar bodies oriented parallel to … WebMar 1, 2000 · The Great Dyke and its two main satellites, the Umvimeela and East Dykes, trend in a north—northeast direction across Archaean basement rocks of the Zimbabwe Craton. SHRIMP analysis of baddeleyite from all three intrusions yields statistically identical results and confirms their essentially synchronous emplacement at 2574 ±2 Ma.

Ion microprobe U—Pb zircon and baddeleyite ages for the Great Dyke …

WebThe Great Dyke is a geological formation that spans across Zimbabwe and contains rich deposits of platinum, palladium, and other PGMs. Other Countries: Palladium deposits … fuchsia chrome

8IPS - The Great Dyke Zimbabwe - 1998 - LIBRO PDF Geology

WebJan 1, 2011 · The Great Dyke of Zimbabwe hosts the world's second largest reserve of platinum-group elements (PGE). Economic PGE mineralization is restricted to sulfide disseminations mainly in pyroxenites of the P 1 layer, the Main sulfide zone, which is currently under extensive exploration. The producing Ngezi and Mimosa mines are the … Geologically the Great Dyke is not a dyke, but is lopolithic and Y-shaped in cross-section. It is a group of layered ultramafic intrusions that extend across Zimbabwe with a strike of about N20°E. The width of the intrusions vary from 3 to 12 km (7.5 mi). The Great Dyke is unusual in that most ultramafic layered intrusions display near horizontal sill or sheet forms. WebSouth African Journal of Geology, 104(4), 319-342. ... Platinum-Group Element Mineralisation in the Great Dyke, Zimbabwe, and its Relationship to Magma Evolution and Magma Chamber Structure. South African Journal of Geology, 104:319-342; Nashwa, Velaphi Moses. "The flotation of high talc-containing ore from the Great Dyke of … fuchsia chenille bedspread queen

Platinum-Group Element Mineralization of the Main Sulfide Zone, …

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WebDec 15, 1998 · The Great Dyke is a major intrusion of mafic and ultramafic rocks that cuts across the dominantly Archean rocks of the Zimbabwe Craton and is regarded as a … WebThe geology of Zimbabwe in southern Africa is centered on the Zimbabwe Craton, a core of Archean basement composed in the main of granitoids, schist and gneisses. It also … gillians newtownardsWebJul 30, 2000 · General geology of the Great Dyke. The Great Dyke of Zimbabwe (general reviews given in Wilson [5]) is a linear intrusion of mafic and ultramafic rocks, 550 km in length that cuts across the Zimbabwe craton in a north-northeastern direction (Fig. 1). gillian snowdon

"WebJun 1, 2016 · Set in ca. 74 km 2 of rugged terrain close to the Zambezi Escarpment, the Snake’s Head Platinum Project covers the northeastern half of the Musengezi Subchamber in the northern part of the Great Dyke. Here, the linear Great Dyke straddles the boundary between the Zimbabwe craton and the late Archaean Migmatitic Gneiss Terrain and is … " - Geology of the great dyke of zimbabwe

Geology of the great dyke of zimbabwe

HYDROTHERMAL ALTERATION IN THE SHURUGWI SUBCHAMBER OF THE GREAT DYKE …

WebThe main platinum-group element (PGE) occurrence in the Great Dyke of Zimbabwe, the Main Sulfide Zone (MSZ), is a tabular stratabound layer hosted in pyroxenites. A petrographic and silicate composition study across the MSZ at Unki Mine in the Shurugwi Subchamber was conducted to help place some constrains on the origin of the … WebJan 1, 2011 · The Great Dyke of Zimbabwe hosts the world's second largest reserve of platinum-group elements (PGE). Economic PGE mineralization is restricted to sulfide …

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WebJul 30, 2000 · General geology of the Great DykeThe Great Dyke of Zimbabwe (general reviews given in Wilson [5]) is a linear intrusion of mafic and ultramafic rocks, 550 km in length that cuts across the Zimbabwe craton in a north-northeastern direction (Fig. 1). It is 11 km at its widest point and narrows to less than 3 km wide in areas where it has … WebThe geology of the Great Dyke is substantial, and has been the subject of a considerable amount of serious scientific research since 1958. ... The Great Dyke of Zimbabwe is a major, NNE-trendi ng ...

WebThe Great Dyke of Zimbabwe is a layered mafic intrusion of igneous, metal-bearing rock associated with chromium, nickel, copper, platinum, titanium, iron, vanadium, and tin. The Great Dyke extends more than … WebZimbabwe’s Great Dyke, running vertically through the center of this scene, probably formed slowly, over centuries, as molten rock forced its way up from the Earth’s …

WebGeology. Geologically the Great Dyke is not a dyke, but is lopolithic and Y-shaped in cross-section. It is a group of layered ultramafic intrusions that extend across Zimbabwe with a strike of about N10°E. The width of the intrusions vary from 3 to 12 km (7.5 mi). The Great Dyke is unusual in that most ultramafic layered intrusions display ... WebSep 1, 2003 · Re-Os data for chromite separates from 10 massive chromitite seams sampled along the 550-km length of the 2.58-Ga Great Dyke layered igneous complex, Zimbabwe, record initial 187Os/188Os ratios in ...

WebMay 1, 2009 · A reappraisal of the structure, geology and emplacement of the Great Dyke, Zimbabwe. In Mafic Dyke Swarms (eds Halls, H. C. and Fahrig, W. F.), pp. 317 –30. … gillians ocean city ticket salesWebThe Great Dyke of Zimbabwe is a layered intrusion of igneous, metal-bearing rock that has been dated to approximately 2.5 billion years in age. ... This geological feature extends more than 550 kilometers (342 miles) … fuchsia chromiumWebThe dyke stretches about 530 km across the craton and varies from between 3 and 12 km wide long its length. The dyke is extremely rich in platinum and chromium deposits that support the Zimbabwe economy. … fuchsia clockWebMay 1, 1982 · A. H. WILSON, The Geology of the Great ‘Dyke’, Zimbabwe: The Ultramafic Rocks, Journal of Petrology, Volume 23, Issue 2, May 1982, Pages 240–292, ... none of … fuchsia christmas treeWebThree major sulfide zones containing platinum group elements (PGE) have been identified in the upper part of the ultramafic sequence of the Great Dyke. The PGE are at the bases of the sulfide zones; the lower two have sparse sulfide mineralization over a thick interval; the upper zone contains higher grade in a thinner stratigraphic layer. gillian somerville glenrothesWebJul 20, 1998 · Great Dyke, narrow series of long, low ridges and hills in Zimbabwe, trending for about 320 miles (515 km). Consisting of four igneous complexes, they increase in … gillians onion rollsWebDec 1, 2010 · We present baddeleyite U–Pb ages of Neoarchaean to Palaeoproterozoic dyke swarms and the Mashonaland sill province in Zimbabwe. The 2575.0. ± 1.5 Ma age of the Umvimeela dyke is indistinguishable from the 2575.4 ± 0.7 Ma result (Oberthür et al., 2002) for a pyroxenite layer of the Great Dyke and testifies to synchronous … fuchsia comforter set