Gold panning

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A gold pan with gravel

Gold panning, or simply panning, is a form of placer and traditional mining that extracts gold from a placer deposit using a pan. The process is one of the simplest ways to extract gold, and is popular with geology enthusiasts because of its cheap cost and the relatively simple and easy process involved although the success rate is comparably smaller compared to other methods such as cradle or a large extractor as the likes of the large extractors in 'The Pit', in Kargoorlie. It is the oldest method of mining gold.[1] The first recorded instances of placer mining are from ancient Rome, where gold and other precious metals were extracted from streams and mountainsides using sluices and panning.[2]

Contents

Process

Gold panning is a simple process. Once a suitable placer deposit is located, some gravel from it is scooped into a pan, where it is then gently agitated in water and the gold sinks to the bottom of the pan. Materials with a low specific gravity are allowed to spill out of the pan, whereas materials with a high specific gravity sink to the bottom of the sediment during agitation and remain within the pan for examination and collection by the gold panner. These dense materials usually consist primarily of a black, magnetite sand with whatever gemstones or metal dust that may be found in the deposit that is used for source material.

Gold panning usually turns up only minor gold dust that is usually collected as a souvenir in small clear tubes. Nuggets and considerable amounts of dust are occasionally found, but panning mining is not generally lucrative. Panning for gold can be used to locate the parent gold veins which are the source of most placer deposits.

Equipment

Various designs of gold pans from around the world
Man panning for gold in Madagascar

Pan

Pans are measured by their diameter in centimeters. Common sizes of gold pans today ranges between 10-17 inches, with 14 inches being the most used size. Pans are manufactured in both metal and high impact plastic. Heavy gauge steel pans are traditional. Steel pans are heavier and stronger than plastic pans. Some are made of lightweight alloys for structural stability. Plastic gold pans resist rust, acid and corrosion, and most are designed with moulded riffles along one side of the pan. Of the plastic gold pans, green and red ones are usually preferred among prospectors, as both the gold and the black sand stands out in the bottom of the pan.

Pan Designs

Gold pans of various designs have been developed over the years,[3] the common features being a means for trapping the heavy materials during agitation, or for easily removing them at the end of the process. Some are intended for use with mercury, include screens, sharp corners for breaking ice, are non-round, or are even designed for use "with or without water". Edward Otho Cresap Ord, II, a former Army officer and co-owner of several mines, patented several pan designs including designs for use with mercury or dry.[3]

See also

References

  1. ^ History of Gold, 2007-10-18, http://www.e-goldprospecting.com/html/history_of_gold.html, retrieved 2009-12-14
  2. ^ Lynn Cohen Duncan (1999-12-09), Roman Deep-vein Mining, http://www.unc.edu/~duncan/personal/roman_mining/deep-vein_mining.htm#Types, retrieved 2009-12-14
  3. ^ a b Various. "GOLD PANS of every shape". ECO-MINEX INTERNATIONAL LTD. http://www.mine.mn/Gold_Pan.htm. Retrieved August 30, 2010.
  4. ^ "C.J. Stevens' New Book on Nearly Two Centuries of Maine Mining a Real Gem". Kennebec Journal and Morning Sentinel. September 25, 1994. http://docs.newsbank.com/g/GooglePM/ME/lib00081,0EAE99E16F4185BC.html. Retrieved July 9, 2010.
  5. ^ Brenda Seekins (September 2, 1995). "Nugget of truth in 'them thar Maine hills'; Persistence can pay off when panning for golf in the Swift River valley". Bangor Daily News. http://pqasb.pqarchiver.com/bangor/access/18282058.html?dids=18282058:18282058&FMT=ABS&FMTS=ABS:FT&type=current&date=Sep+02%2C+1995&author=Brenda+Seekins+Of+the+NEWS+Staff&pub=Bangor+Daily+News&desc=Nugget+of+truth+in+'them+thar+Maine+hills'+Persistence+can+pay+off+when+panning+for+golf+in+the+Swift+River+valley&pqatl=google. Retrieved July 9, 2010.
  6. ^ Jim Buchta (December 22, 1996). "Farmington, Maine; Bustling retreat nestled in forest". Star Tribune (Minneapolis, MN). http://www.highbeam.com/doc/1G1-62645589.html?refid=gnews_1108. Retrieved July 9, 2010.
  7. ^ "TV Show to Focus on Hedgehog Hill", Sun Journal, October 27, 1989. Retrieved July 10, 2010.
  8. ^ Gary Shapiro (July 14, 2006). "Of Treasure & Trash". The New York Sun. http://www.nysun.com/arts/of-treasure-trash/36070/. Retrieved July 9, 2010.

External links