Small Mine Selective Blasting

January 2000 by Dr. Ralph E. Pray

Gold Prospecting for Better or Worse: Tuck and Roll

April 2021

…more difficult terrain must be traversed in the hope of locating small pockets, low depressions or small gullies on needle-covered slopes.

The Essentials of Dry Washing

August 2013
Most dry washers have a feed rate adjustment. It needs to be set so that the material flows evenly over the riffles and does not bury them.

Mining Stock Quotes, Mineral & Metal Prices

March 2009

Legislative and Regulatory Update

January 2003
• The ESA used, and apparently abused, in Arizona and New Mexico
• In a somewhat related story...
• Among the numerous bills that died when Congress adjourned...
• More on the ESA
• Miners must present proof of filing, says IBLA
• Federal government backs mining project
• Appeals Court says Clinton roadless rule can stay

Detecting in Australia's Etheridge Goldfield

October 2007
This remote goldfield covers an area of over 13,000 square miles of the Savanna Gulf country of Far North Queensland, Australia.

The Fire Assay of Fly Eyes

July 2002
Colorado-Utah-Wyoming oil shale was first reliably discovered to contain gold and silver by the U.S. Bureau of Mines in the 1920s. Although most of this vast shale resource, up to 1,000 feet in thickness, contained nil or barely detectable values, many brown shale samples fire assayed here over the past thirty years have yielded up to 0.02 ounces per ton (opt) Au and 2.0 opt Ag.

Elizabethtown: Uncovering a Buried California Mining Community

July 1999
Although there are many mining ghost towns in California, it is rare to find the ruins of one that was abandoned 140 years ago and then subsequently buried by hydraulic mining debris.

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