The species receiving electrons is reduced, that donating electrons is oxidized. The black dotted line is the watertable. The reaction stops here and the sulphide ore is enriched. The porphyritic stock is the engine that allows the development of the minerals. The ore minerals are found in a series of zones radiating outwards from the stock.

Modeling results show that aggregation of ~40–70% sulfide blebs of different grain size from the disseminated ore into the networks can generate the coarser group sulfide PSD of net-textured ore. In addition, monosulfide solution (MSS, pyrrhotite component)-enriched sulfide globules are commonly located close to sulfide matrix …

It is proposed that a Cu- and PPGE-enriched sulfide liquid fractionated from an IPGE-enriched mss, followed by the formation of an iss, and finally the extraction of a PPGE-rich Cu-liquid from the iss forming the bornite-chalcopyrite assemblages. Sulfide textures and the presence of chalcopyrite veins suggest that the iss was leached by high ...

sulfide ore and reprecipitated at depth. This precipitation of Cu sulfides with high Cu/S ratios can produce an economically significant copper enrichment at the reactive redox boundary between massive sulfide protore and downward penetrating fluids. The supergene enrichment "blanket" is overlain by

The gold-bearing mineral in the high sulfide ore is enriched into the concentrate by flotation, and then slaked lime and additives are added to the flotation concentrate, and the mixture is roasted after being thoroughly mixed. The roasting temperature is generally controlled at about 650 ° C. Sulfide is removed by roasting, so …

THE EVOLUTION OF SUPERGENE ENRICHMENT IN THE MORENCI PORPHYRY COPPER DEPOSIT, GREENLEE COUNTY, ARIZONA by Merritt Stephen Enders _____ A Dissertation Submitted to the Faculty of the

(a) Panorama of a polymineralic sulfide globule in sample DV10-4, (b) panorama of a droplet-shaped sulfide in sample DV627-1-2 (Pshenitsyn et al., 2020), (b) typical area of net-textured texture in the ore enriched in pyrrhotite, (d) pentlandite II lamella in pyrrhotite, (e) chalcopyrite in association with cubanite formed at the exsolution of ...

The Lower Cambrian black shale sequence of the Niutitang Formation in the Yangtze Platform, South China, hosts an extreme metal-enriched sulfide ore bed that shows >10,000 times enrichment in Mo, Ni, Se, Re, Os, As, Hg, and Sb and >1,000 times enrichment in Ag, Au, Pt, and Pd, when compared to average upper continental crust. …

The formation of this type of ore is associated with low-temperature melts enriched in volatile and low-melting elements (Pb, Sn, Bi, Sb, As), into which residual sulfide melts can transform (Godlevsky, 1968). ... A.A., Paneyakh, N.A., and Marakushev, S.A., Sul'fidnoe rudoobrazovanie i ego uglevodorodnaya spetsializatsiya (Sulfide Ore ...

With the assumption that PGEs in the mantle are selectively concentrated in the sulfide minerals, it is a combination of the degree of partial melting and the oxidation state of the mantle rocks that determine the release of PGEs into the magma (Mungall et al., 2006).Owing to high-fO 2 conditions in the fluid-enriched mantle wedge underneath a …

The Ni- and Mo-sulfide–extremely enriched ore deposited in this layer has attracted intensive attention for its unusual metal enrichment in such a critical epoch. The metal enrichment in this layer also led to the speculation that the increase of the nutrient elements triggered or enabled the Cambrian Explosion. Although it is the world's ...

Sopcha ore bed: ∼2 ppm/several m ... Notably, some intrusions are PGE and sulfide enriched but do not contain massive chromitites (Penikat, Jimberlana). This is because saturation in sulfide melt may be triggered by processes (e.g., assimilation of external sulfur, differentiation) whose impact on chromite solubility is too limited to cause ...

J.E. Mungall, in Treatise on Geochemistry (Second Edition), 2014 13.8.1 Introduction. Magmatic ore deposits are masses of igneous rock enriched in useful chemical elements to such an extent that it is feasible to mine them at a profit. To be considered an ore, an accumulation of an element must combine high grade with large tonnage and must be …

In flash smelting, dry sulfide ore containing less than 1% moisture is fed to the furnace along with preheated air, oxygen-enriched air (30–40% oxygen), or pure oxygen. Iron and sulfur are oxidized. The heat that results from exothermic reactions is adequate to smelt concentrate, producing a liquid matte (up to 45% nickel) and a fluid slag.

VMS ore-forming fluids are acidic, reduced, 1–3 M chloride solutions in which metals were transported mainly as chloride complexes (Table 3).Before the discovery of black smokers, temperatures of the ore fluids were estimated from rare fluid inclusion data and sulfur isotope fractionation between sulfide mineral pairs. pH values about 1 unit less than …

Despite the economic importance of chalcophile (sulfide-loving) and siderophile (metal-loving) elements (CSEs), it is unclear how they become enriched or …

Sulfide Ore. sulfide ores contain the metal as sulfides, and in oxidized ores the valuable mineral may be present as oxide, sulfate, silicate, carbonate, or some hydrated form of these. ... oxygen-enriched air (30–40% oxygen), or pure oxygen. Iron and sulfur are oxidized, and the heat that results from exothermic reactions is adequate to ...

Barnes et al Magmatic Sulfide Ore Deposits Elements Template Page 4 intermediate solid solution (iss, approximately CuFeS 2), leaving a residual melt progressively enriched in Pt, Pd and semi-metals (Li et al. 1996). This fractionation process takes place on scales from that of individual ~cm sized globules (Figure 3) to

Low-grade lateritic iron ore forms with the enrichment of Fe by chemical weathering/leaching. ... Supergene enrichment occurs at or near the base of the weathering profile developed over deep-seated sulfide deposits or rocks enriched in Ni, Cu, and Co. The Ni–Cu–Co and other metals are leached from the oxidized part of the laterite profile ...

Abstract. Magmatic sulfide ore deposits are products of natural smelting: concentration of immiscible sulfide liquid ('matte'), enriched in chalcophile elements, derived from silicate magmas ...

Oxidation supergene enrichment. Nov. 3, 2014 • 0 likes • 9,410 views. Download Now. Download to read offline. Education. A presentation on the topic of Oxidation-Supergene Enrichment of Sulfide ore deposits. Vishnu Raayan Follow. Joint Secretary at Hamrock society, IIT Roorkee.

The oxidized zone and zone of enrichment may contain profitable mineralization. The original sulphide bearing rock may not have contained sufficient ore to pay for deep mining, pumping of water and treatment of …

The ore can be divided into four main varieties: 1) fine- to medium-grained sulfide dissemination, 2) thin sulfide veinlets and fracture fillings, 3) massive to semi-massive sulfide veins or lenses, and 4) brecciated sulfides (Fig. 5 A–D). Disseminated sulfides are rather common in the entire ultramafic body.

Volcanogenic Massive Sulfides. Accumulations of dominantly sulfide minerals that form at sites of focused hydrothermal discharge on the seafloor. Also refers …

For some low-grade nickel sulfide ore from lean ore regions, for example, a sulfide mine in Shaanxi, China, due to the grade of nickel sulfide raw ore generally between 0.3 and 3.0%, it is necessary to enrich the ore by mineral processing before smelting. ... The enriched concentrate contains fuel composition in the form of iron …

This paper presents the study of Raman spectroscopy for online detection of enriched sulfide ore minerals from froth flotation. The Raman instrument with a custom‐made probe connector allowed ...

Sulphide ores were mostly created by (i) the intrusion of molten magma from the mantle into the crust of the earth and (ii) the formation of localized metal-rich sulphide ore bodies …

potential ore grade, and requires also that removal of copper be minimal. Distinction between these protore environments is significant in exploration for copper oxide and supergene sulfide enrichment targets because prospects dominated by reactive rock units are likely to display only incipient copper enrichment unless an adjacent or

In flash smelting, nickel ore concentrate containing less than 1% moisture is fed to the furnace along with preheated air, oxygen-enriched air (30–40% oxygen), or pure oxygen. Iron and sulfur are oxidized, and the heat that results from exothermic reactions is adequate to smelt the concentrate to produce a liquid matte and molten slag.

This paper presents the study of Raman spectroscopy for online detection of enriched sulfide ore minerals from froth flotation. The Raman instrument with a …