- placer platinum
- самородна платина; шліхова платина
English-Ukrainian analytical chemistry dictionary. 2013.
placer platinum
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Placer mining — (pronounced plass er ) refers to the mining of alluvial deposits for minerals. This may be done by open pit (also called open cast mining) or by various forms of tunneling into ancient riverbeds. Excavation may be accomplished using water… … Wikipedia
placer mining — ☆ placer mining [plas′ər ] n. mining of placer deposits by washing, dredging, or other hydraulic methods * * * Oldest method of recovering gold from alluvial deposits. It takes advantage of gold s high density, which causes it to sink more… … Universalium
Platinum group — The platinum group (alternatively, the platinum group metals or platinum metals) is a collective name sometimes used for six metallic elements clustered together in the periodic table. These elements are all transition metals, lying in the d… … Wikipedia
platinum — /plat n euhm, plat neuhm/, n. 1. Chem. a heavy, grayish white, highly malleable and ductile metallic element, resistant to most chemicals, practically unoxidizable except in the presence of bases, and fusible only at extremely high temperatures:… … Universalium
placer deposit — Natural concentration of heavy minerals caused by the effect of gravity on moving particles. When heavy, stable minerals are freed from their matrix by weathering processes, they are slowly washed downslope into streams that quickly winnow the… … Universalium
Placer deposit — In geology, a placer deposit or placer is an accumulation of valuable minerals formed by deposition of dense mineral phases in a trap site. The name is from the Spanish word placer , meaning alluvial sand . Types of placer deposits include… … Wikipedia
Platinum — This article is about the chemical element. For other uses, see Platinum (disambiguation). iridium ← platinum → gold Pd ↑ Pt ↓ Ds … Wikipedia
placer — placer1 /plas euhr/, n. Mining. 1. a surficial mineral deposit formed by the concentration of small particles of heavy minerals, as gold, rutile, or platinum, in gravel or small sands. 2. the site of a form of mining (placer mining) in which a… … Universalium
placer — I plac•er [[t]ˈplæs ər[/t]] n. 1) min mir a natural concentration of heavy metal particles, as gold or platinum, in sand or gravel deposited by rivers or glaciers 2) min the site of a form of mining(plac′er min ing)in which a placer deposit is… … From formal English to slang
Gold placer claim — In the United States, a placer claim grants to the discoveror of valuable minerals contained in loose material such as sand or gravel the right to mine on public land. Other countries such as Canada, Mexico, and Australia grant similar rights. In … Wikipedia
Amarte Es Un Placer — Infobox Album | Name = Amarte Es Un Placer Type = Album Artist = Luis Miguel Released = September 14, 1999 Genre = Latin Pop, Ballad Length = Recorded = Label = WEA Producer = Reviews = * Allmusic Rating|2.5|5… … Wikipedia
