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Added: September 12, 20242024-09-12T08:02:36-04:00 2024-09-12T08:02:36-04:00In: General Information

La Mine de Muruntau

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Le gisement d’or de Muruntau, situé dans l’ouest de l’Ouzbékistan, est l’un des plus grands gisements d’or individuels au monde, avec des ressources dépassant les 5000 millions de tonnes (mt) d’or. Il a été découvert en 1958 par Mordvintsev Y.N., Khamyshkin P.V. et Luk’yanov S.I. grâce à la vérification d’une anomalie géochimique à l’arsenic (Kempe et al., 2016).

La mine est détenue et exploitée par le Navoi Mining and Metallurgy Combinat (NGMK), une entreprise d’État en Ouzbékistan. La mine de Muruntau est située dans le désert de Qizilqum en Ouzbékistan. C’est la plus grande mine d’or à ciel ouvert au monde, mesurant environ 4,3 km de long, 3,2 km de large et 650 m de profondeur.

C’est l’une des plus grandes mines d’or au monde, produisant plus de 2 millions d’onces (56,7 tonnes) d’or par an. La mine possède des réserves d’or estimées à 150 millions d’onces (4 819 tonnes), ce qui en fait le plus grand gisement d’or en Eurasie. En 2022, Muruntau est devenue l’une des principales opérations minières d’or au monde.

La minéralisation aurifère à Muruntau est hébergée dans un méga-stockwerk de veines de quartz et de zones d’altération associées au sein de méta-siltstones carbonacés de la formation de Besapan. La minéralisation de qualité minerai est caractérisée par des roches enrichies en biotite-plagioclase-quartz-orthoclase et en métaux alcalins.

Muruntau utilise des techniques d’exploitation à ciel ouvert avec un système de transport du minerai par camions et convoyeurs. Le minerai est broyé et traité dans l’usine hydrométallurgique sur site en utilisant le lixiviation sur tas pour extraire l’or.

Bibliographie

Kempe, U., Graupner, T., Seltmann, R., De Boorder, H., Dolgopolova, A., & Zeylmans Van Emmichoven, M. (2016). The Muruntau gold deposit (Uzbekistan) – A unique ancient hydrothermal system in the southern Tien Shan. Geoscience Frontiers, 7(3), 495–528. https://doi.org/10.1016/j.gsf.2015.09.005

https://en.wikipedia.org/wiki/Muruntau_gold_deposit

https://www.mining-technology.com/projects/muruntau-gold-mine-uzbekistan/

https://www.ngmk.uz/en/home/pressa/1471-the-muruntau-mine-became-one-of-the-world-leaders-in-gold-mining-in-2022.html

https://www.ngmk.uz/en/home/pressa/889-muruntau-mine-became-the-world-leader-in-gold-mining-in-2021.html

https://www.sciencedirect.com/science/article/pii/S1674987115001139

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