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placer deposit |
Also found in: Wikipedia, Hutchinson | 0.01 sec. |
placer depositNatural 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 lighter matrix. Thus the heavy minerals become concentrated in stream, beach, and lag (residual) gravels and constitute workable ore deposits. Minerals that form placer deposits include gold, platinum, cassiterite, magnetite, chromite, ilmenite, rutile, native copper, zircon, monazite, and various gemstones. |
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? Mentioned in | ? References in periodicals archive | |
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A third target is creek placer deposits of the type that have sustained numerous Yukon placer mines for decades. The area covered by the leases is considered to have potential to host a very large placer deposit, suitable for a large placer mining operation. OTCBB:LNXGF), where the Company is drilling a high-grade placer deposit, and has recently discovered an intrusive with indicator minerals similar to that of Kinross's Fort Knox Deposit, and the Stepovich Claims, where Teryl has a 10% net profit interest from Kinross. |
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placer deposit
