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1. Introduction. The origin of Au –U deposits in the Archaean Witwatersrand Basin of South Africa is the subject of longstanding discussion.Because of the close spatial association of pyrite with Au and U in the mineralised conglomerates, the origin of pyrite is a central aspect in all genetic hypotheses of Witwatersrand mineralisation, in both primary …
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The results show that regional- to district-scale geological controls on thermal springs occurrence in South Africa involve the presence of or proximity to HHPGs (as heat source control), groundwater yield of ∼2 L/s (as water source control) and intersections of structural lineaments with particular trends (as pathways control). In southern ...
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Monazite and xenotime show high degree of liberation in this product. The tailings, especially of the second cleaner unit, were recommended for further beneficiation of rare …
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Typical, fine (d 80 < 70 µm) South Australian iron-oxide silicate rich tailings assaying 26.2% Fe, 18.6% Si, 3.9% Al, and 1.07% TREO, was investigated for possible upgrade by a multistage wet magnetic separation. Detailed mineralogical characterisation revealed the tailings contain fine REE minerals bastnäsite, monazite, stetindite ...
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Most heavy mineral deposits or beach placer deposits are mined for titanium minerals and zircon, with monazite and leucoxene considered as tailings. The heavy mineral tailings …
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Brownfields, byproducts and tailings are South Africa's biggest growth opportunity. Orion Minerals CEO Errol Smart. 27th October 2022. By: Nadine James. Features Deputy Editor. Font size ...
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The large volumes of waste generated during gold beneficiation are a major pollution concern in South Africa. To remove these potential pollution risks in perpetuity, non-conventional approaches to mine waste management are required which avoid land disposal of "unwanted" material. This dissertation explores the opportunities, drivers and …
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The rare earth concentrates in Bayan Obo contain a large number of monazite, a refractory rare earth phosphate, for which the most commonly method …
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The ca. 1100 Ma Namaqualand Metamorphic Complex is host to a number of vein-type monazite-apatite-chalcopyrite-magnetite deposits, which cluster in a approximately 30-km 2 area 160 km south of the Okiep copper district. The largest of these veins, at Steenkampskraal, has been mined intermittently since the late 1950s for thorium.
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Smart cited the "mountains" of the rare-earth mineral monazite lying on "waste heaps" along the West Coast and pointing to State-owned diamond mining company Alexkor rejecting tonnes of ...
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Phase 1 involves upgrading the Driefontein 2 plant to process tailings from the Driefontein 5 dump at a rate of between 400 000 and 600 000 tpm and depositing the residue on the Driefontein 4 tailings dam. First production is expected in the first quarter of 2019, adding up to 120 kg or 3 800 oz of gold a month to DRDGOLD's production profile.
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The Mineralized Monazite Zone (MMZ) of the Steenkampskraal Monazite Mine (Fig. 1) is a variably-dipping, monazite-bearing body within granitic to charnockitic orthogenesis and supra-crustal rocks of the Bushmanland Sub-province of the Proterozoic Namaqua-Natal Metamorphic Province (Andreoli, 1994, Andreoli et al., 1994).The mine, …
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mine tailings in Florida and South Carolina. Based on reported data through October 2020, the estimated value of titanium mineral and synthetic concentrates imported into the United States was $520 million. Abrasive sands, monazite, and zircon were coproducts of domestic mining operations. About 90% of titanium mineral concentrates
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Significant quantities of monazite are available in South Africa, Madagascar, India, Malaysia, Vietnam, and Brazil. The global monazite market size was at USD 53.38 million in 2021 and is poised to grow from USD 54.61 million in 2022 to USD 65.5 million by 2030, growing at a CAGR of 2.3% in the forecast period 2023–2030 [ 1 ].
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of South Africa (RSA) (modified after G OF F E T AL. (2004) and C RO C KE R (1985)). Stratigraphically, the 5000 m thick Rooiberg Group is enclosed by the intracratonic sedimentary
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Monazite. Monazite is a phosphate mineral that is rich in light rare earth elements (LREE). It is commonly found in various rock types and is used as a reliable geochronometer to date magmatic and metamorphic rocks. ... South Africa, Read et al. 164 showed that the light Ln elements are retained in altered monazite, the heavy Ln and Y are being ...
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Zircon in tailings samples is concentrated in the fine-grained fraction (−100 mesh) rather than the coarse-grained fraction (+48 and +100 mesh). Rare earth minerals (i.e., monazite and xenotime) are observed and distributed randomly in tailings, kaksa, kong, and concentrates. Monazite-(Ce) and xenotime are subhedral to anhedral grains …
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The Steenkampskraal project is located in Western Cape Province of South Africa. The proven and probable reserves of Steenkampskraal rare earth elements mine are estimated to be 799,700t. The Steenkampskraal project is expected to produce 30,000t of ore a year. Image courtesy of Peggy Greb, U.S. Department of Agriculture.
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WELCOME TO MINRITE Minrite produces heavy mineral sands products and concentrates, including Zircon, Rutile, Ilmenite, Garnet and Monazite. The company's in-house regulatory team also provides support to Group and third-party mining companies with prospecting and mining right applications, EIA/EMPs, water use licence applications, registrations with the …
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Bastnesite, monazite, and xenotime are main sources of RE hydrometallurgical processing. ... Rare earth mines have operated in South Africa, India, and Brazil in the 1950s, but from the 1960s to the 1980s, the largest global producer was a mine in Mountain Pass, California. In the 1990s, China began large scale production and …
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The mining and exploitation of rare earth ores were primarily operated in South Africa, India and Brazil. ... At present, the main rare earth minerals applied to industrial production include bastnaesite, monazite, xenotime and ion-adsorption rare ... and the rare earth concentrates produced were actually the tailings of the iron ore …
DetailsThis contribution reviews the mechanisms by which textural complexity develops in monazite, describes some of the analytical methods used to exploit the …
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Major and trace element analyses of monazite by electron probe microanalyzer (EPMA) are routinely carried out for several decades. U–Th–total Pb method of monazite dating is currently considered as a reliable and acceptable tool to decipher the time of geological events. The purpose of the present study is to establish the …
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Mulaba-Bafubiandi et al. (2002) researched the tailings emanating from beach sand mineral slimes dams of the Kwazulu-Natal area (South Africa). The combination of screening, spiral concentration ...
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Monazite and xenotime show high degree of liberation in this product. The tailings, especially of the second cleaner unit, were recommended for further beneficiation of rare earth elements.
DetailsThe beach placer deposits in South Africa are mainly mined for titanium and little work has been done on their REE potential, particularly as regards tailings from existing titanium production. Most heavy mineral deposits or beach placer deposits are mined for titanium minerals and zircon, with monazite and leucoxene considered as tailings. The
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In South Africa, HMS with monazite occur along both the eastern (Richards Bay, East London) and western coastal strips (Namakwa Sands), derived from sources in the HFSE-rich Mesoproterozoic ...
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Risk Management & 3rd Party Audits. Tailings Solutions and Consulting Engineers for the African Mining Market. We've successfully completed projects for clients in South Africa, Zimbabwe, Sierra Leone, Kenya, …
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Media Contact: On the morning of September 11, a tailings dam collapsed at the closed Jagersfontein diamond mine in Free State, South Africa. Local news reports the flood of mine waste killed at least three people, and injured 40. The failure swept away houses, damaging at least 20. The tailings flowed over 8 km and left a path over 1.5 km …
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This area houses production from Africa, South Asia and Australia. As well, there currently exists extraction of rare earths from monazite in India, Brazil and China.
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Monazite-bearing placer-type deposits can occur in residual weathering zones, beaches, rivers and streams, dunes, and offshore areas. The detrital mixture of sand, silt, clays, and heavy (dense) minerals deposited in placers are derived primarily from the erosion of crystalline rocks, mainly igneous rocks and moderate- to high-grade …
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The results of the study are that by using CT spiral, the monazite content has been enriched to 0.04% by weight from a feed sample containing 0.01%. The same has been further upgraded to 0.17% by weight using HG8 Spiral 1. HG8 Cleaner Spiral has further enriched the concentrate to 0.33% by weight. In the tailings, monazite contains …
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Frequency histogram showing distribution of single, detrital zircon and monazite ages from the Dominion and Witwatersrand sequences (data from Barton et …
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Coastal environments are all eco-sensitive and mine site rehabilitation is employed throughout, including effective disposal of radiogenic tailings associated with …
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