· What is oxidation. Oxidation is the process in which one atom strips electrons from another, claiming them for its own. It is one side of redox type reactions.
· Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost and at the same time obtain the highest net return.This latter point is most important. In many cases a gold mill using an all-cyanide flowsheet with fine grinding of all the ore will report very low gold content in the tailings particularly on an ...
The results indicate that the direct oxidation of a simple sulfide mineral is a process in which the metal atoms move into the surrounding solution to become aqueousmore » When solid sulfur is finally left over, it undergoes a series of reactions to be oxidized to sulfate ion.
The ore " beds " above water level in the Prince mine are thoroughly oxidized and consist of manganese-iron oxides low in silver, lead, and zinc. About 800,000 tons of ore carrying 2.5 to 3 ounces of silver to the ton, 3 per cent of lead, 35 per cent of iron, and …
S.M. Gandhi, B.C. Sarkar, in Essentials of Mineral Exploration and Evaluation, 2016 2.5 Ore Body. Generally, an ore body is an accumulation of a solid and fairly continuous mass of ore with gangue, distinctly distinguishable by form and character from the enclosing host rocks. An ore deposit might include single or several ore bodies. The ore bodies are distinguished by their shape: (1 ...
Iron oxide copper gold ore deposits (IOCG) are important and highly valuable concentrations of copper, gold and uranium ores hosted within iron oxide dominant gangue assemblages which share a common genetic origin. These ore bodies range from around 10 million to >4,000 million tonnes of contained ore, and have a grade of between 0.2% and 5% copper, with gold contents ranging from 0.1 to 1.41 ...
Our data do not only prove the very limited impact of metamorphic overprint on the δ 65 Cu characteristics of the ore bodies but it also challenges our traditional understanding of the genesis of Broken Hill-type deposits by providing strong indications for a pre-metamorphic oxidation/weathering process that dictated the distribution of the ore.
Zinc ores are widely distributed throughout the world although more than 40 percent of the ranging from open-pit mining mainly in the case of oxidized ore bodies which are necessary in order to produce a concentrate suitable for treatment. mineral from the impure …
chemicals (cyanide, for example) to penetrate the ore body. The main problem with the roasting technique is that the resulting odors are environmentally unac-ceptable. An alternative procedure for breaking up the sulfide compounds has recently become popular, bacterial oxidation. The bacterial oxidation process is relatively slow and
The Gordeevskoye prospect is gold-beresite. Seven gold ore bodies averaging 80 - 180 m long, 1 - 16 m wide, and with gold grades up to 18 g/t have been identified in the Gordeyevskoye prospect. The ore is oxidized on the surface and the oxidation zone is well defined to a depth of 40 m and partially delineated to a depth of 85 m.
Iron ore pellets as a furnace charge components, rep-resent porous bodies with well-developed system of dif-ferent type pores. The type and the surface of pores, their distribution, determine the course of such defining qual-ity processes as oxidation and restoration during agglom-eration and subsequent metallization of the product [1-4].
Thus, ore-bodies, when exposed to weathering processes, develop a zonal arrangement of different mineral associations, which reflect different degrees of oxidation. Oxygen dissolves in the ground water from the air and diffuses to metal sulfide surfaces where it can be reduced.
Copper - Most copper ore bodies are mined from minerals created by weathering of the primary copper ore mineral chalcopyrite. Minerals in the enriched zone include chalcocite, bornite, djurleite. Minerals in the oxidized zones include malachite, azurite, chyrsocolla, cuprite, tenorite, native copper and …
Crushed ore in the leach pad. The pregnant leach pond is in the distance. The crushed ore rests on a leak-proof membrane to protect the underlying ground and prevent the acid and copper ions polluting the local water table. 2. Dilute sulfuric acid is poured over the crushed ore using an irrigation system. (Courtesy of Red Tiger Mining Inc.)
The ore-body was relatively thin for block-caving and so requir ... total, however, a very considerable amount of the copper is in the oxidized zone. The secondar.y sulphide zone consists of veinlets of pyrite and chalcopyrite partially replaced by chalcocite. The copper content of the enriched sulphide
The primary oxidized, tuberous, siliceous, ferruginous manganese ore is located in a small area (Csárda Hill, Nyíres open pit) in Úrkút, and similar ore was known from Eplény. This ore type was mined in both areas up to 1980, so archive data of reports were used for examination, except for the collection of …
Below: Cross section of an oxidized sulphide deposit. Original sulphide sources of mineralization. Black Smokers. In order for an oxidized deposit to be formed, an original sulphide ore body must be present. The sulphide ore body may be formed by cold alkaline oxidizing seawater migrating through sediment and other rock beneath the sea.
Ore Deposits Formed by Oxidation and Supergene Enrichment · When ore deposits are exposed to the oxidation zone they are weathered and altered with the country rocks. · The surface waters oxidize many ore minerals and yield solvents that dissolve other minerals. · An orebody thus becomes oxidized and generally leached of many of its valuable materials down to the groundwater table, or to ...
Below: Cross section of an oxidized sulphide deposit. Original sulphide sources of mineralization. Black Smokers. In order for an oxidized deposit to be formed, an original sulphide ore body must be present. The sulphide ore body may be formed by cold …
· The method is of great interest to many mines, as very low-grade ore, practically waste, stripped from higher grade bodies can perhaps show a profit by this treatment. It is evident that the reactions in these heaps will not be quite the same as in the oxidation of the clean pyrite ores at Rio Tinto, because of the presence of considerable ...
· The distal massive sulfide ore body (Renison Bell) is a major ore deposit and the proximal skarn body (Pine Hill) has not and probably never will be mined. Einaudi et al. (1981) emphasized that there is a common thread linking the several types of tin skarn deposits and that is the characteristic suite of trace elements (Sn, F, B, Be, Li, W, Mo ...
· A number of ore deposits are formed as the result of hydrothermal processes in the Earth crust. From the integration of field and laboratory data (petrography, isotope geochemistry, fluid inclusion and organic matter studies and numeric simulations) the research group aims to understand the role of the fluids in the formation of ore deposits and the relationship between the mineralizing ...
Zinc ores are recovered by many mining techniques, ranging from open-pit mining (mainly in the case of oxidized ore bodies, which are located closer to Earth''s surface) to the normal underground methods (used for the more deeply located sulfide ores). The most common underground method of ore extraction is cut-and-fill stoping, in which ...
The presence of the manto as well as the North Break breccia ore bodies and increased levels of oxidation indicated that such a zone existed, intersecting the pipe between 28 and 30 levels. It was identified and interpreted from its vuggy texture to be a palaeo-aquifer and was subsequently named the North Break Zone.
1 U 3 0 8 is the symbol for a chemical compound, uranium oxide, composed of three atoms of uranium to eight atoms of oxygen. Most chemical assays for uranium are expressed in terms of U 3 0 8, and ore purchases are made on that basis.The uranium content equals approximately 85 per cent of the assay expressed in terms of U 3 0 8. 2 Hardness of minerals is related to Moh''s scale of 1 to 10 using ...
The mining district of Austin, in central Nevada was well known for its silver ores, but this specimen of oxidized ore also contains a considerable amount of gold in addition to the silver. It shows few sulfide minerals because it is well oxidized. ... Character of Gold Ore Bodies: A very common occurrence of gold ore is in true fissure veins ...
Oxidation of sulfide ore bodies; 1, Geochemical environments in terms of Eh and pH Motoaki Sato. Motoaki Sato Search for other works by this author on: ... iron, silver, and zinc sulfides in aqueous solutions are discussed and a procedure outlined for identifying first-step oxidation or reduction reactions of sulfide minerals. This content is ...
The ore body has been studied by numerous geologists with the most notable being Reno H. Sales (1914) and Weed, R. H. (1912). A good summary can be found in The Graton-Sales publication of "Ore Deposits of the United States" (1968) titled Ore Deposits at Butte, Montana authored by Charles Meyer, Edward Shea, and Charles C. Goddard Jr.
· Process Occurring When ore deposits are exposed to the oxidation zone they are weathered and altered with the country rocks. The surface waters oxidize many ore minerals and yield solvents that dissolve other minerals. An ore body thus becomes oxidized and generally leached of many of its valuable materials down to the groundwater table, or to ...
· Oxidized copper ore bodies may be treated several ways, with hydrometallurgical processes used to treat oxide ores dominated by soluble minerals such as copper carbonate minerals. These oxide ores ...
The most common oxidized ore of lead is cerrusite. Then follow in order the sulphate, molybdate, and chlorophosphate* This "Carbonate* ore in many cases is high grade due to the natural concentration by weathering ... but more often in irregular bodies. The silver is close
the phyllic zone, the primary (hypogene) ore body contains chalcopyrite, bornite, and molybdenite (minor) with minor to moderate amounts of pyrite. Located near the surface, the leached cap and enrichment blanket are features that form as a result of the oxidation and weathering of the sulfide-bearing minerals contained within a porphyry copper ...
Ore bodies will have a layer of chalcocite which corresponds to the present or a past water table level and this layer is called a "chalcocite blanket". the chalcocite blanket is richer in copper than the upper oxidized portion of the ore body and usually richer than the primary unaltered ores below.
Oxidized and reduced mineral assemblages in greenstone belt rocks of the St. Ives gold camp, Western Australia: vectors to high-grade ore bodies in Archaean gold …
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