Bornite is an important copper ore mineral and occurs widely in porphyry copper deposits along with the more common chalcopyrite Chalcopyrite and bornite are both typically replaced by chalcocite and covellite in the supergene enrichment zone of copper deposits
The most significant chalcopyrite deposits to be mined are hydrothermal in origin In these, some chalcopyrite occurs in veins and some replaces country rock Associated ore minerals include pyrite, sphalerite, bornite, galena, and chalcocite Chalcopyrite serves as the copper source for many secondary mineral deposits
Copper in chalcocite that is associated with hypogene hydrothermal ores is derived from a magmatic hydrothermal fluid or is extracted from country rocks at high temperatur Moreover, extensive studies showed that hypogene hydrothermal copper minerals such as chalcopyrite and bornite do not display appreciable fractionation (>±1) [7–11 .
Bornite is an important copper ore mineral and occurs widely in porphyry copper deposits along with the more common chalcopyrite Chalcopyrite and bornite are both typically replaced by chalcocite and covellite in the supergene enrichment zone of copper deposits Bornite is also found as disseminations in mafic igneous rocks, in contact
copper activation of pyrite increases with increasing pyrite content, reflecting the attenuation in chalcopyrite recovery INTRODUCTION Copper exists in the earth crust as copper iron sulphide or copper sulphide minerals Examples of such minerals include chalcopyrite (CuFeS 2), bornite (CusFeS 4), chalcocite (Cu 2S) and covellite (CuS) In .
Definition of bornite - a brittle reddish-brown crystalline mineral with an iridescent purple tarnish, consisting of a sulphide of copper and iron
The minerals commonly associated with chalcopyrite include pyrite, bornite, chalcocite, galena, and sphalerite Removing chalcopyrite from secondary mineral deposits resulting in copper can be done by weathering or solution, transported a short distance, and then redeposited as secondary oxide, sulfide, or carbonate minerals
Nov 08, 2012· BORNITE (Copper Iron Sulfide) – Amethyst Galleries’ Mineral Gallery Bornite is an important copper ore mineral It ranks up there with many of the other copper ores such as chalcocite, chalcopyrite, covellite, digenite, cuprite , »More detailed
More commonly it is found in oxidized ores, such as bornite, chalcocite or chalcopyrite These ores have to undergo various treatments in order to extract the copper from within them share:
Chalcocite is named after the Greek word chalcos, which means “copper” in Greek, in allusion to the copper content in this mineral Chalcocite forms from the alteration of other minerals, especially other copper sulfides such as Bornite, Covellite, and Chalcopyrite, ,
Today the Butte mines are closed and flooded, but its mineralogical legacy of fine specimens remains--most noteably the copper sulfide and sulfosalt minerals such as bornite, chalcocite, chalcopyrite, colusite, covellite, digenite, djurleite, and enargite, and other ,
Investigation of Flotation Parameters for Copper Recovery from Enargite and Chalcopyrite Mixed Ore Kazutoshi Haga+, William Tongamp and Atsushi Shibayama Faculty of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
Associated copper minerals include the sulfides bornite (Cu 5 FeS 4), chalcocite (Cu 2 S), covellite (CuS), digenite (Cu 9 S 5); carbonates such as malachite and azurite, and rarely oxides such as cuprite (Cu 2 O) Chalcopyrite is rarely found in association with native copper
Throughout human history, chalcopyrite has been our leading source of copper This is despite having a relatively low copper yield (only 25% of its atoms are copper) compared to other copper minerals such as chalcocite and cuprite (both with 67% yields), or bornite and covellite (that have 50% yields)
Bornite is an important copper ore mineral It ranks up there with many of the other copper ores such as chalcocite, chalcopyrite, covellite, digenite, cuprite and tetrahedrite As a mineral specimen, bornite is usually lacking Good crystals are rare and thus bornite is ,
‘Some of the chalcopyrite is rimmed by bornite and more rarely by covellite and/or chalcocite’ ‘The Albert and Argent mines, South Africa, have produced arborescent masses of silver, some to several kilograms in weight and often in, or associated intimately with, bornite’
In large deposits of copper sandstones, chalcopyrite is accompanied by bornite and chalcocite (at Dzhezkazgan and Udokan in the USSR and the deposits of the Copperbelt of Central Africa) Concentrations of chalcopyrite in sedimentary rocks are usually low, but they may sometimes reach commercially acceptable levels in copper shales, for example .
Chalcopyrite is a beautiful mineral, with good crystals being fairly common It is also readily available, with quality specimens being surprisingly affordable "Peacock Ore" which is sold to many amateur mineral collectors often as a variety of Bornite, is in fact almost always Chalcopyrite treated with acid to produce an iridescent tarnish .
Peacock Ore (Bornite) is a crystaline variety of Chalcopyrite and they have very similar properti Bornite is a copper iron sulfide mineral commonly found in hydrothermal veins, contact metamorphic rocks and in the enriched zone of sulfide copper deposits It is a common ore of copper and is easily recognized because it tarnishes to iridescent shades of blue, purple, green and yellow
Chalcocite forms from the alteration of other minerals, especially other copper sulfides such as Bornite, Covellite, and Chalcopyrite, and may also form pseudomorphs after these minerals It often forms in association with Chrysocolla, with the Chrysocolla forming as an alteration around the ChalcociteChalcocite is named after the Greek word chalcos, which means "copper" in Greek, in ,
3 Which would contain more copper—a hundred kilograms (kg) of chalcopyrite or 100 kg of chalcocite? 4 Remember that porphyry copper deposits often have additional ore grade minerals such as molybdenite (MoS2) An average ore grade for the Chino porphyry copper deposit is 074 wt% copper and 0012 wt% molybdenum
Sep 19, 2012· Bornite (Cu3FeS3) is a copper ore used in the production of copper , Best Answer: the molar mass of Cu3FeS3 is 34268 grams / mole and that mole of Cu3FeS3 has within it 3 moles of Cu (3 moles Cu) (63546 grams Cu / mol , Bornite (Cu3FeS3) is a copper ore used in the production copper,
Mar 29, 2016· Examples of some sulfates are; bornite (Cu 5 FeS 4), chalcocite (Cu 2 S), covellite (CuS), digenite (Cu 9 S 5) Malachite Cu 2 CO 3 (OH) 2 is an example for a hydroxide and cuprite (Cu2O) is a rarely produced oxide Chalcopyrite very rarely oxidizes to native copper Uses of Pyrite and Chalcopyrite:
Chalcopyrite is most often found with pyrite and other sulfide minerals, along with sphalerite, galena, dolomite, tourmaline and quartz Chalcopyrite can oxidize to form other secondary minerals including malachite, azurite, and cuprite Associated ore minerals include pyrite, sphalerite, bornite, galena, and chalcocite
Reaction under the relatively reducing conditions involving chalcopyrite+chalcocite results in replacement of chalcopyrite in the sequence where chalcopyrite is replaced by bornite, below about 355°C, and by intermediate solid solution (ISS) and later bornite, above 355°C
The flotation of chalcocite, bornite, chalcopyrite, and pyrite has been studied in a microflotation cell in which the potential of a bed of the mineral particles could be controlled electromechanically The ethylxanthate-induced flotation of each mineral is markedly dependent on electrochemical .
May 21, 2014· The sulfide bornite [Cu 5 FeS 4] is also an important copper ore (close to 65% by mass), especially in the copper porphyry deposits It is Orthorhombic but commonly is massive and/or granular in habit It does not display the brassy color of pyrite or chalcopyrite until tarnished but is a mottled brown/black/purple to copper-red but often is mixed with chalcopyrite It easily tarnishes upon .
Jun 01, 2013· Chalcopyrite is a copper iron sulfide mineral that crystallizes in the tetragonal system , Chalcocite (Cu2S) , Bornite An important copper ore for it has a copper content of about 63 percent .
It is only 25%, compared to other copper minerals such as chalcocite, Cu2S - 67%; cuprite, Cu2O - 67%; covellite, CuS - 50% or bornite Cu5FeS4 - 50% However the large quantities and widespread distribution of chalcopyrite make it the leading source of copper Chalcopyrite is a common mineral and is found in almost all sulfide deposits
Bornite and chalcopyrite are the two common original copper minerals, from which other copper minerals have been derived through secondary action It is also frequently, itself, a secondary mineral, formed in the upper, enriched zone of copper veins through the action of descending copper-bearing solutions, upon chalcopyrite