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Lake Ore

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lake ore [′lāk ‚ȯr]
(mineralogy)

Lake Ore 

(also bog iron ore), iron ore of lacustrine origin consisting of hydrated iron oxides (limonite) with various impurities (Mn2O3, P2O5). The Fe2O3 content may be as much as 68 percent. Lake ore is formed when the iron and manganese carried by rivers and groundwater are deposited on the bottom of lakes and swamps as hydrated iron oxides (powder, pea ore, bean ore, cakes of ore, or occasionally solid crusts). The ore usually occurs in separate sections and strips in the form of seams, interlayers, and lenses; the thickness of the deposits ranges from several cm to 2–3 m. The ore is not important commercially.



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Cigar Lake ore will be sent by truck 80 kilometres to the mill at McClean Lake, which itself expects to receive approval this year for a $60-million expansion.
The Totten and Kelly Lake ore bodies are thought to contain reserves that are richer than those currently mined in Sudbury.
For 2006, we expect production to decline to approximately 4,000,000 pounds reflecting the decline in the Sue C stockpile, reduced grades coming from the Sue A and E pits and plant shutdowns to tie in the mill expansion required to treat Cigar Lake ore starting in 2007.
 
 
 
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