Sulfide Ore

Sulfide Ore

 

any of several natural mineral formations consisting of metal sulfides. Metal selenides, tellurides, arsenides, and antimonides are also classified among the sulfide ores.

Sulfide ores are an important source for the production of Ni, Co, Cu, Zn, Pb, Mo, Bi, Sb, and Hg. They contain not only sulfides but also other minerals, including minerals that do not contain metals—for example, quartz and calcite, and sometimes barite and micaceous minerals. A distinction is made between massive ores, in which sulfides are predominant, and disseminated ores, in which nonsulfide minerals are predominant. Sulfide ores may be simple or complex. Complex sulfide ores containing sulfides of copper, zinc, and lead are especially common, as are complex copper, nickel, cobalt, antimony, and mercury ores. Many sulfide ores contain Pt, Au, Ag, Cd, In, Se, and Te as admixtures.

Most deposits of sulfide ores are endogenous, and among those, hydrothermal deposits predominate. The ore bodies are most often veins, but they may also be sheets, lenses, stocks, and pipes. The length and depth of such bodies range from hundreds of meters to several kilometers. The reserves of sulfide ore reach billions of tons, and the reserves of metal are as high as millions of tons. The metal content in the ore ranges from several tenths of a percent to 20–50 percent. (See alsoPYRITES.)

REFERENCE

Smirnov, V. I. Geologiia poleznykh iskopaemykh, 2nd ed. Moscow, 1969.

V. I. SMIRNOV

References in periodicals archive ?
KinVally is in the northern part of the 15 kilometer long Kinousa fault structure and the company said the target is in a favourable area within a "cluster of historically mined volcanogenic massive sulfide ore deposits".
The metal dissolution process occurs in the EPS layer formed on the interfacial space between the outer cell membrane and the sulfide ore surface [27, 28].
At San Sebastian we continue to discover and mine oxide mineralization while we take a bulk sample to determine the potential economics of the sulfide ore."
The overarching goal of this work was to test the possibility of replacing sodium cyanide by chitosan polymer as a selective pyrite depressant in the bulk flotation of complex sulfide ore sample containing galena (PbS), chalcopyrite (CuFe[S.sub.2]), sphalerite (ZnS), pyrite (Fe[S.sub.2]), dolomite (CaMg[(C[O.sub.3]).sub.2]), and marcasite (a polymorph of pyrite).
In addition, 8.2 million tons of sulfide ore have also been detected.
An analysis of sulfide ore deposits from one of the world's richest base-metal mines confirmed that oxygen levels were extremely low on Earth 2.7 billion years ago, but also showed that microbes were actively feeding on sulfate in the ocean and influencing seawater chemistry during that geological time period.
Dockter continued saying that surface sampling of the sulfide ore body suggest grades of 0.2 ounces per ton of gold.
the recovery efficiency of sulfide ore at the flagship Olimpiada mine.
Sumitomo will make best endeavors toward the smooth ramp up to full production of the sulfide ore expansion at Cerro Verde from now on as well.
Under the agreement, the two Japanese concerns will buy a 21-25 percent stake to be raised through a capital increase by Sociedad Minera Cerro Verde S.A.A., which operates a copper mine near Arequipa, Peru, to execute its planned sulfide ore expansion, they said.
Deposits of zinc sulfide ore that weren't created by bacteria often contain as much as 10 percent iron, as well as significant quantities of arsenic and lead.
With his team of three graduate students, Alfantazi hopes to generate new knowledge to reduce costs and improve recovery in extraction techniques to develop laterite and sulfide ore bodies, the former being the most abundant sources of nickel deposits in the world.