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+#REDIRECT [[Ore]]
-{{Short description|Complex metal ores}}
-{{About|complex metal ores|Russian mining company|Polymetal|Metallic combination of elements|Alloy}}
+{{R to related}}
-'''Polymetallic ores''' (from '''poly...''' and "metals") or '''multimetal ores''' are complex [[ores]] containing a number of chemical elements, among which the most important are [[lead]] and [[zinc]]. In addition, polymetallic ores can contain [[copper]], [[gold]], [[silver]], [[cadmium]], sometimes [[bismuth]], [[tin]], [[indium]] and [[gallium]]. The main minerals that form polymetallic ores are [[galena]], [[sphalerite]], to a lesser extent [[pyrite]], [[chalcopyrite]], [[arsenopyrite]], [[cassiterite]].<ref name="bse">From TSB</ref><ref>[[National Encyclopedia of Uzbekistan|OʻzME]]. Birinchi jild. Toshkent, 2000-yil</ref>
-The formation of primary polymetallic ores took place in different geological epochs (from [[Precambrian]] to [[Cenozoic]]). Basically, such ores occur in the thickness of volcanogenic rocks of acidic composition.<ref name="bse"/>
-Rocks containing polymetallic ores are often intensively altered by [[hydrothermal processes]] — [[chloritization]], [[sericitization]] and [[silicification]]. Hydrothermal deposits are also of some importance. They are formed as a result of weathering processes of near-surface parts of ore bodies (to a depth of 100–200 m). These deposits are usually represented by iron hydroxides containing [[cerussite]] PbCO<sub>3</sub>, [[anglesite]] PbSO<sub>4</sub>, [[smithsonite]] ZnCO<sub>3</sub>, [[calamine]] Zn<sub>4</sub>[Si<sub>2</sub>O<sub>7</sub>] [OH]<sub>2</sub>×H<sub>2</sub>O, [[malachite]] Cu<sub>2</sub>[CO<sub>3</sub>](OH)<sub>2</sub>, [[azurite]] Cu<sub>3</sub>[CO<sub>3</sub>]<sub>2</sub>(OH)<sub>2</sub>. Depending on the concentration of ore minerals, a distinction is made between solid or disseminated ores. Ore bodies of polymetallic ores are distinguished by a variety of sizes (having a length of several m to km), morphology (bedded and lenticular deposits, [[Rod (geology)|stocks]], veins, nests, complex tube-like bodies) and occurrence conditions (gentle, steep, consonant, secant, etc.).
-==See also==
-* {{ill|lead-zinc ores|uk| Свинцево-цинкові руди}}
-* {{ill|resources and reserves of lead|uk|Ресурси і запаси свинцю}}
-* {{ill|Zinc resources and reserves|uk|Ресурси і запаси цинку}}
-* {{ill|Flotation of lead polymetallic ores|uk|Флотація свинцевих поліметалічних руд}}
-==References==
-{{reflist}}
-==Literature==
-* Small mining encyclopedia, 2004.
-[[Category:Economic geology]]
-[[Category:Mining]]
-{{geology-stub}}