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Abdel Kader Z, Shalaby IM (1982) Post-ore alteration at the Atshan talc mine, Hamata, Eastern Desert, Egypt. Ann Geol Surv Egypt 12:163–175 Google Scholar Abdel Karim AM, El‐Shafei SA (2017) Mineralogy and chemical aspects of some ophiolitic metaultramafics, central Eastern Desert, Egypt: evidences from chromites, sulphides and gangues.
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The studied sulfide mineralizations of Atshan and Darhib areas are related to the south Eastern Desert shear zones. They are hosted in talc- and tremolite-talc-rich rocks and also in meta-basaltic ...
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The studied sulfide mineralizations of Atshan and Darhib areas are related to the south Eastern Desert shear zones. They are hosted in talc- and tremolite-talc-rich rocks and also in meta-basaltic dykes and quartz-veins. The principal mineralization in Atshan includes sphalerite, pyrite, chalcopyrite, galena and pyrrhotite, whereas that in ...
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For the last several years, Montana has been the leading talc producing state in the United States (U.S. Geological Survey, 1996). For example, in 1992 Montana supplied about 40 percent of the U.S. mine production of talc (Virta, 1992). All of this production has come from the large deposits of high purity talc in the southwestern part of the state.
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The talc replacing the dolostone has a monotonous δ 18 O signature of 10.7 to 12.7 per mil and a δ 18 SMOW composition of –64 to –62 per mil. However, the talc replacing quartzites, slates, or impure dolostones has more variable and lower δ 18 O values (8.1, 9.0, and 11.5‰, respectively).
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12%The studied sulfide mineralizations of Atshan and Darhib areas are related to the south Eastern Desert shear zones. They are hosted in talc- and tremolite-talc-rich rocks and also in meta-basaltic dykes and quartz-veins. The principal mineralization in Atshan includes sphalerite, pyrite, chalcopyrite, galena and pyrrhotite, whereas that in Darhib comprises chalcopyrite, …
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Some of these deposits (e.g., Darhib and El Atshan) have been identified as talc mines (Hussein, 1990). Most studies on VHMS deposits in Egypt are concentrated mainly on the Um Samuki deposit, which is the largest in reserves (Table 1) .
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talc deposite atshan talc mine sulphides. talc deposite atshan talc mine sulphides . talc deposite atshan talc mine sulphides ; Volcanogenic massive sulfide ore deposit Volcanogenic massive sulfide ore deposits, also known as VMS ore deposits, are a type of metal sulfide ore deposit, mainly copper zinc which are associated with and created by volcanic associated hydrothermal events in ...
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Detailed geochemical and mineralogical investigation of four talc deposits in the Eastern Desert of Egypt (Atshan, Abu Gurdi, Darhib and Kashira) suggests that the deposits form a distinct lithological unit within the Shadli metavolcanic rocks. The talc crystallized from the replacement of siliceous carbonate beds locally intercalated with clastic sediments.
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The studied sulfide mineralizations of Atshan and Darhib areas are related to the south Eastern Desert shear zones. They are hosted in talc- and tremolite-talc-rich rocks and also in meta-basaltic dykes and quartz-veins. The principal mineralization in Atshan includes sphalerite, pyrite, chalcopyrite, galena and pyrrhotite, whereas that in Darhib comprises chalcopyrite, sphalerite, pyrite, …
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Fig. 1a is a simplified regional geological map showing the location of the Darhib and Abu Gurdi talc deposits, Fig. 1b is a detailed geological map of the Atshan talc mine (after Fasfous et al., 1988; Salem et al., 1999) and Fig. 1c is a location map of the four deposits.
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Of the 35 reported small talc occurrences in the Eastern Desert and Sinai, the Atshan and Darhib mines were the main talc producers. Atshan mine, the largest producer, was in operation ...
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zed, talc and talc-carbonate rocks. These talc deposits have been attributed to the flow of hydrothermal solu-tions rich in Si, CO2, Fe and S along tectonized shear zones (Said 1962; Hassan 1969). Abdel Kader and Shalaby (1982) studied the alteration at the Atshan talc mine and recognized three stages, i.e. serpentinization
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Fig. 1a is a simplified regional geological map showing the location of the Darhib and Abu Gurdi talc deposits, Fig. 1b is a detailed geological map of the Atshan talc mine (after Fasfous et al., 1988; Salem et al., 1999) and Fig. 1c is a location map of the four deposits. Download : Download full-size image; Fig. 1.
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Most of talc- and tremolite-talc-rich rocks from Atshan and Darhib have wide rang es of Zn (415 ‒ 11,000 ppm), Cu (26 ‒ 2950 ppm) and Pb (15 ‒ 430 ppm) compared with that
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cut mining of talc can be an attractive and profitable business (Urosevicet al., 2002). WMC Resources Ltd. first became involved in talc exploration in 1960, at the Three Springs Talc Mine, 316 km north of Perth, Western Australia. There, sub-horizontal, strata bound talc …
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This study examined commercial talc deposits in the U.S. and their amphibole-asbestos content. The study found that the talc-forming environment directly influenced the amphibole and amphibole-asbestos content of the talc deposit. Large talc districts in the U.S. have mined hydrothermal talcs that replaced dolostone. Hydrothermal talcs, created by siliceous fluids heated by magmas at depth ...
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32 Atshan Talc Mine 33. 33 Atshan Talc Mine Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O Dolomite 34. The sulfide-talc association The association of Mg-rich minerals such as talc and tremolite with sulfides at the Atshan talc mine and at other talc deposits in the Hamata area is enigmatic.
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low grade metamorphic sedimentary and volcanic rocks. Talc deposits are widely variable in shape and are mostly pod shaped, lentic ular, thin shells and irregular masses. The majority of talc exploitation in Egypt is wadi El Allaqi, Derhib, wadi El Atshan, Gabal El Angoria and wadi Eggat (Kamel, et al 2001).
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Mississippi-Valley-type ore deposits (Zn-Pb sulphides or carbonates, barite, celestite, fluorite), and also to magnesite (MgCO 3) and talc (Mg 3 Si 4 O 10 (OH) 2) ores. One such association of burial dolomites hosting MVT, magnesite, and talc ores occurs across the northern Iberian Peninsula (e.g., Velasco et al. 1987; Tornos and
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The Hamata Talc Canadia Mineralogy. THE ORIGIN OF THE ATSHAN TALC DEPOSIT IN THE HAMATA AREA, EASTERN DESERT, EGYPT: A GEOCHEMICAL AND MINERALOGICAL STUDY EVA S. SCHANDL6 Department of Geology, University of Toronto, 22 Russell Street, Toronto, Ontario M5S 3B1, Cawuia NADIA A. SHARARA Department of Geology, Faculty a/Science, Assiut University ...
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