The presence of gold telluride minerals may render an ore refractory, the extent of this depends on the telluride mineral present and the mineralogical association [3]. Gold, silver, and gold/silver-telluride minerals in ores dissolve more slowly than native gold in cyanide solutions, which results in less efficient gold extraction [4].

The major chemical components of the sulfide refractory gold ore and pyrite are shown in Table 2. The sulfide refractory gold ore (SRGO) contains 30.34% Fe, 22.23% S, 11.19% As, 3.24% Al and 60.25 g/t Au. The total content of Fe, As and S is up to 63% of the sulfide refractory gold ore. The pyrite contains 43.36% Fe and 41.26% S.

The published and original data on the tellurium mineralization of gold ore deposits of the Aldan Shield are systematized and generalized. The gold content is related to hydrothermal-metasomatic processes caused by Mesozoic igneous activity of the region. The formation of tellurides occurred at the very late stages of the generation of gold …

Yan and Hariyasa (1996) also examined the flotation performance of a high-grade tellurium gold ore from the Kalgoorlie deposit. They showed that tellurides float readily at natural pH values (8.0) with the addition of frother only and that the recovery and rate of flotation could be improved by the addition of xanthates or mercaptobenzothiazol.

Tellurium is sometimes found as an element, but most of the times is found as tellurides. Gold tellurides are found in the earth. They are valuable ores of both tellurium and gold. This gold ore was not recognized as gold during one gold rush and was used as a filler. It was then discovered that it was gold telluride, making another gold rush.

The gold tellurides represent a unique class of minerals wherein elemental gold is atomically bound to elemental tellurium, producing one of the few known naturally occurring a instances of stochiometric solid of gold and an additional element. Other examples of atomically bound gold minerals include aurostibite (AuSb

Gold ore associated with Telluride is hardly soluble in ordinary cyanide solutions and special treatment is necessary for its extraction. There are two methods in use in such cases. Roasting. The ore is ground dry to about 30 mesh and roasted; it is then ground to a slime in water or cyanide solution, usually in grinding pans, utilizing the ...

In Mexico the presence of gold tellurides was first reported in 1923 ( IGM, 1923 ); in 1965 Gaines published a study on the tellurium species in Sonora, a …

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Tellurium is known to be enriched in a wide range of ore deposits including VMS, orogenic and intrusion-related gold, epithermal-porphyry, Carlin-type, and skarn deposits (Cook et al., 2009b, Martin et al., 2019, Kelley and Spry, 2016, Keith et al., 2018, Keith et al., 2020).

This gold carrying telluride, in turn is hooked to chalcopyrite, which is the main copper ore mineral at the Pebble deposit. "The majority of what is conjectured to be an enormous tellurium endowment at the Pebble deposit is potentially hosted in the structure of chalcopyrite and pyrite," USGS wrote in a 2018 report on minerals critical to the ...

Tellurium, a guide to mineral deposits. Te dispersion patterns are useful in exploring for different types of mineral deposits and in providing additional information about known ore deposits. The Te content of rocks is given for five mining districts in the western United States: Coeur d'Alene, Idaho; Robinson, near Ely, Nevada; Montezuma ...

Gold–(silver) telluride minerals constitute a major part of the gold endowment at a number of important deposits across the globe. A brief overview of the chemistry and structure of the main gold and silver telluride minerals is presented, focusing on the relationships between calaverite, krennerite, and sylvanite, which have overlapping …

The Fortitude Deposit is a world-class gold-silver skarn deposit in the main Battle Mountain District. The deposit was comprised of an upper and a lower ore zone, formed in place, but separated by the N-striking, W-dipping Virgin Fault and by a granodiorite porphyry dike intruded along the fault.

Yan and Hariyasa (1996) also examined the flotation performance of a high-grade tellurium gold ore from the Kalgoorlie deposit. They showed that tellurides float readily at natural pH values (∼8.0) with the addition of frother only, and that the recovery and rate of flotation could be improved by the addition of xanthates or …

In copper ores, tellurium forms stable crystalline compounds (called tellurides) of gold, silver, bismuth, mercury, platinum and …

Most of the gold- and silver-telluride ore in the Cripple Creek district, Colorado, is found in fracture fillings within a volcanic subsidence basin. Haloes of Au, Ag and Te all define the mineralized portions of the fissure veins. ... Determination of tellurium and gold in rocks to 1 part per billion. U.S. Geol. Surv., Open-File Rep., 76-531 ...

Tellurium is sometimes found in its native or elemental form; however, it is more commonly found forming tellurides of gold such as calaverite and krennerite, petzite, and sylvanite. Interestingly, gold itself …

Von Born kept the solid metal in the gold ore for antimony and attributed the low yield to a combination of the gold with antimony. Mueller von Reichenstein contradicted this view and held it first for "sulfurized bismuth". ... Tellurium shows the highest affinity to gold of all elements and is therefore often found in nature in the form of ...

The ability to liberate gold inclusions and even submicroscopic "dissolved" gold from pyrite would be advantageous, as would the ability to dissolve calaverite in order to recover both gold and tellurium. Similarly new routes to treating the common platinum minerals, and which for moncheite could also recover tellurium, would be desirable.

Tellurium (Te) is a very rare element that averages only 3 parts per billion in Earth's upper crust. It shows a close association with gold and may be present in orebodies of most …

Tellurium recovery is normally related to the recoveries of copper, gold, and bismuth. Although it is also recovered from flue dusts and gases generated during copper, bismuth, and lead ore smelting and from lead refinery skimming, nearly all commercial tellurium is produced from electrolytic copper refinery slimes.

The current reconnaissance study reports variability of stable Te isotopes in tellurides and native tellurium from the ~10 M oz. intrusion-related, low-sulfidation epithermal Emperor gold-telluride deposit, Fiji, and is the first Te isotope study of spatially constrained samples of minerals in the system Au-Ag-Te in an ore deposit.

The ore treated came from some distance below the surface, and carried but little free gold, as is shown by the value of the amalgam saved from the coppers—something less than $1 per ton of ore treated. The tellurides of gold and silver are extremely sectile, and this property alone is sufficient to render futile the method used, …

The simplest and most common association of tellurium with gold is as the mineral calaverite [AuTe2 ], but other metal associations also occur. Silver associations …

Potential sources of tellurium include bismuth telluride and gold telluride ores. Substitutes: Several materials can replace tellurium in most of its uses, but usually with losses in efficiency or product characteristics. Bismuth, calcium, lead, phosphorus, selenium, and sulfur can be used in place of tellurium in

Tellurium (Te) is a very rare element that averages only 3 parts per billion in Earth's upper crust. It shows a close association with gold and may be present in orebodies of most gold deposit types at levels of tens to hundreds of parts per million. In large-tonnage mineral deposits, such as porphyry copper and seafloor volcanogenic massive sulfide …

Heat a gold telluride calaverite and small blisters of pure gold are left when the tellurium boils away. (Bob Jones) One of the interesting things about Cripple Creek gold, where so much was in the form of calaverite and sylvanite, is what we call blister gold. ... It can form crystals, small and usually brownish in monoclinic form, but these ...

Elemental tellurium and tellurium dioxide are related to the hydrometallurgy of precious metal tellurides in two ways: (1) both species are products of precious metals tellurides cyanidation; and (2) tellurium dioxide is a by-product of the roasting of tellurides to produce metallic gold/silver prior to cyanidation.

Nine tellurium ore veins have been discovered, which strike from 350 to 10 degrees and dip at 55 to 70 degrees westward. Widths of the ore bodies vary between 25 and 30 cm. ... This indicates that ...