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· 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 of our current understanding of the geological
DOI / Corpus ID 134064189; Silver Isotopes as a Source and Transport Tracer for Gold A Reconnaissance Study at the Sheba and New Consort Gold Mines in the Barberton Greenstone Belt Kaapvaal Craton South Africa☼
·The October 2024 technical report for Greenstone outlined the design of an open pit mine that will produce million ounces of gold over an initial 15 year mine life with life of mine production expected to average approximately 330 000 ounces of gold per year The Greenstone team has constructed a 27 000 tonnes per day leach/carbon in pulp
·The Palaeo Archaean Ga volcano sedimentary sequence of the Gorumahisani Badampahar greenstone GBG belt occurs along the northeastern fringe of the Singhbhum Craton SC and is
·The c Ga old sedimentary Cheshire Formation of the Belingwe greenstone belt BDB central Zimbabwe has been studied in detail for the first time to shed some light on the much debated evolution of this classical belt The Cheshire Formation rests sharply on a mafic volcanic unit Zeederbergs Formation and comprises a basal eastward sloping carbonate
·The gold mines of the Barberton greenstone belt in South Africa document one of the first economic grade metal con centrations in the Archaean rock record Anhaeusser 1986;Groves et al 1998
·The Belingwe greenstone belt Fig 1 contains a well preserved sequence of late Archaean supracrustal rocks that locally overlie a g ranitoid basement up to Ga old Fig 2
Still more recently Dirks and Jelsma 1998 have proposed that a thrust underlies a crustal scale nappe in the northeast part of the greenstone belt and that thrusting on layer parallel shear zones was the ®rst deformation in this part of the greenstone belt Thus gold deposits in the greenstone belt could be related to shear zones intrusion
Gold mineralisation in the world class Sheba Fairview mining district in the Barberton greenstone belt South Africa occurs along a fracture network that is arranged in overlapping Riedel P
·Chromite grains in nearly fresh Archean komatiites from the late Archean Belingwe greenstone belt ca Ga in Zimbabwe have diverse morphologies skeletal and dendritic chromite is restricted to spinifex zones whereas euhedral grains occur throughout the flows Systematic differences in chromite compositions ate present between the spinifex iop
·The Belingwe Greenstone Belt contains a variety of igneous and metamorphic rocks set in a granite gneiss terrain Five main tectonic units are identified The oldest unit is the Ga Shabani Tokwe Gneiss Complex forming much of the terrain to the east of the belt and partly underlying much of the greenstones
·Geology of the Belingwe Greenstone Belt Zimbabwe by M J Bickle Martin A E G Nisbet J L Orpen 2020 Taylor & Francis Group edition in English
Okote gold field is found within Neoproterozoic greenstone terrains of southern Ethiopia This greenstone belt trend in North South direction and characterized by Neoproterozoic rocks comprising basic/ ultrabasic and other older basement gneisses which form crustal scale shear zones extending for about 150 Km along its strike
This in turn opens new perspectives for gold exploration that has traditionally focused on Archaean granite greenstone terranes and which has possibly underestimated the potential for large scale gold deposits in younger supracrustal belts The Lega Dembi gold mine in the Sidamo region of southern Ethiopia is the largest gold producer in
·The phenomenon of mineral endowment of Archean greenstone belts hinges upon a conjunction of magmatic sedimentary and metamorphic processes that operated in different geodynamic settings and
·Journal of African Earth Sciences Vol 15 No 3/4 pp 489 500 1992 0899 5362/92 $ Printed in Great Britain 1993 Pergamon Press Lid The Lega Dembi gold mine an example of shear zone hosted mineralization in the Adola greenstone belt Southern Ethiopia W GHEBREAB E YOI IRNNES and GxoRoxs Ethiopian Institute of
·Mauritania is located in West Africa belonging to the West African Craton composed of Archaean formations > Ga Maurin et al 1996 These formations are cropping out in the Reguibat Shield area part of the four significant geological assemblages of Mauritania Fig 2 It contains a greenstone belt of primary economic importance around the world
·Shallowing upward carbonate cycles in the ∼ 2650 Ma Cheshire Formation Belingwe greenstone belt Zimbabwe closely resemble their Proterozoic and Phanerozoic counterparts The cycles form part of a karstified carbonate ramp sequence that is overlain by and grades basinward into siliciclastic turbidites A single section of 74 cycles
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 discuss them in the light of greenstone belt evolution
·Orogenic gold in the Barberton greenstone belt has been mined for more than a century having yielded >350 t of the metal Agangi et al 2019 and the largest single antimony deposit in any
·The Archean eon is associated with large scale changes in Earth s geosphere and bio sphere including the onset of plate tectonics and the expansion of oxygenic photo synthesis although the full
·Gold mineralization in the Akobo greenstone belt of Southwestern Ethiopia is confined to metamorphosed volcano sedimentary rocks of greenschist amphibolite facies and is closely associated with
