types, mav reflect a number of processes, Among these are: (1) Depletion of magma in chalcophile metals through fractional crystallization uoder sulfidesaturated conditions. with the resultant removal of sulfides as well as silies prior to s,epiaration of the main ore. (2) Reaction of a fixed mass
An ore deposit is one occurrence of a particular ore type. (e.g. MKD5 was the inhouse name for the Mount Keith nickel sulphide deposit). Classifiion. Ore deposits are classified according to various criteria developed via the study of economic geology, or ore
together distinguish them from other types of mineral deposits. This paper describes the main geological features of eight basemetal deposit types, listed here by the names and acronyms by which they are commonly referred to in the geological literature: • volcanogenic massive sulfide (VMS) • Mississippi Valleytype (MVT)
The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. For example: FeO(s) + SiO 2 (s)→ FeO.SiO 2 (slag) This is
The most common sulfide crystalling in this manner is galena (PbS), the ore mineral of lead. A type of packing that involves two sulfide ions in each of the octahedral positions in the sodium chloride structure is the pyrite structure. This is a highsymmetry structure characteristic of the iron sulfide
1. VMS Volcanogenic Massive Sulphide Deposits and NiCuCo Type Magmatic Massive Sulphide Deposits Volcanicassociated massive sulphide (VMS) deposits occur throughout the world and throughout the geological time column in virtually every tectonic domain that has submarine volcanic rocks as an important constituent.
Sulfides in Ore Deposits. Table 2 shows the main types of ore deposits that contain significant amounts of sulfide minerals, their major ore minerals, the metals extracted from them, and some specific examples (see Cox and Singer 1987 Craig and Vaughan 1990, 1994). Pyrite is
Oct 23, 2011 · Example Gold Ore Gold Mining to a vein of gold ore. consequence of the existence of native gold movements in the earth''s heat or thermal. crystal lattice of certain sulfide ores. Gold
Epigenetic stockwork ores are in close relationship with volcanism and often represent the feeder channels of the massive sulphide sediments. Most important ore types mined are massive "crude
Apatite is a concentrator of F and Cl, which play a significant role in the formation of minerals of platinumgroup elements of pneumatolitic origin. There are three apatite generations in Norilsk magmatic sulfide ores. Apatite I occurs in sulfide bodies and rims of fluid alteration above sulfide droplets in disseminated ores.
118 7. Geophysical Characteristics of Volcanogenic Massive Sulfide Deposits Figure 7–1. Schematic diagram of the modern TransAtlantic Geothermal (TAG) sulfide deposit on the MidAtlantic Ridge, depicting a cross section of a volcanogenic massive sulfide deposit with concordant semimassive to massive sulfide lens underlain by a
Copper sulfide ores are typically the most profitable types of copper ores to mine. That is because they have high copper content, and the copper in them can more easily be separated from unwanted
Nickel is commonly present in two principal ore types – sulfide or laterite ores. Sulfide ores are typically derived from volcanic or hydrothermal processes and usually include copper (Cu) and/or cobalt, and sometimes other precious metals such as gold or platinum and palladium (generally grouped as platinum group metals or PGMs).
Chalcopyrite is the most important copper ore. Chalcopyrite ore occurs in a variety of ore types, from huge masses as at Timmins, Ontario, to irregular veins and disseminations associated with granitic to dioritic intrusives as in the porphyry copper deposits of Broken Hill,
The Sulfide Class minerals comprise an economically important class of minerals. Most major ores of important metals such as copper, lead and silver are sulfides. Strong generalities exist in this class. The majority of sulfides are metallic, opaque, generally sectile, soft to average in hardness and they have high densities, black or darkcolored streaks, and an igneous origin.
The down side to laterite ores, and the reason why they haven''t been exploited on a widespread scale thus far, is that they require much more energy in processing over sulfide ore types. Lateritic Nickel Ore Processing. While sulfide nickel ores are processed via upgrading to concentrates and then smelting, this approach is not applicable to
Different minerals have a preference for different types of conditions in the flotation cell, so by planning the chemicals used to make the froth, the ph of the water and other factors, it is possible to separate differing sulfide minerals out of ores which contain more than one type of sulfide.
Nov 28, 2016 · I. The reason of the gold mineral refractory There are so many types of reasons that caused the difficulty of gold ore processing, including physical element, chemical element, and
The ore types are divided into. Sulfide ore samples recovered by corers from and beyond Orebody 1 in the Logatchev1 hydrothermal field (MidAtlantic Ridge, 14䓭′ N) are studied by optical
Ore is rock that contains economic amounts of a particular element, e.g. gold ore, iron ore, molybdenum ore, or praseodimium ore. In contrast, rock that is not judged to contain economic quantities of an element is egorized as waste rock. The metals in ore can occur in many different minerals (compounds) in the rock. As an example, copper occurs in more than 50 minerals
Copper Ore Types: Sulfides Versus Oxides – TheStreet. Apr 21, 2011 · copper oxide ores and copper sulfide ores. JIM CRAMER''S VIEW OF 2013. Home Gold Companies there is an important difference. »More detailed
Ore concentration is roasted to reduce impurities, including sulfur, antimony, arsenic, and lead. The roasted product, calcine, serves as a dried and heated charge for the smelting furnace. Smelting of roasted (calcine feed) or unroasted (green feed) ore concentrate produces matte, a molten mixture of copper sulfide (Cu2S), iron sulfide
If sulfide ore or sulfide tailings are exposed to water and air during mining, a chemical reaction creates sulfuric acid – basically battery acid. There has never been a sulfide mine that has not polluted nearby water resources. Pollution from sulfide mining is very expensive to fix, and a burden for taxpayers.
Typically this type of Disseminated Ore is seen above and lateral to the higher grade, more massive parts of the system. One of the characteristics of magmatic sulphides is that the individual sulphide grains – like the orebodies as a whole – tend to be zoned having a
28 nettextured ores, intermediate types commonly taking the form of "patchy nettextured ores" 29 containing sulfiderich and sulfidepoor domains at cm to dm scale. These textures are 30 ascribed primarily to the process of sulfide percolation, itself triggered by the process of
the main metalliferous ore deposit types found in Australia. To a large extent, these expressions reﬂect oreforming processes and are best described in reference to the different genetic ore types. There is now a large literature on Australian ore deposits, including their geochemical
Recovery of gold in sulfide ores has fallen into several egories. First is froth flotation, and second is cyanidation of the ores. Using cyanide to recover gold from sulfide ores generally results in 30 to 35% recovery, and the best I have heard of is around 50% recovery.
Sulfide matrix breccias form a continuum with various types of sulfidepoor silierich ores, the common process being the gravitydriven infiltration of sulfide melt through the pore space of melting or stillmolten substrate rocks. Sulfide melt infiltration links sulfide matrix ore breccias and emulsion textured ores with distinctive
The problems with processing sulfide ores by the normal methods and the fact that most of those problems can be removed by first roasting the ore, led to the development of a variety of ore roasting systems that were installed in the mills of that day.
Ironore mining methods vary by the type of ore being mined. There are four main types of ironore deposits worked currently, depending on the mineralogy and geology of the ore deposits. These are magnetite, titanomagnetite, massive hematite and pisolitic ironstone deposits. Banded iron formations