The Bawl Mill

March 2007 by Staff

Platinum in Laccoliths

May 2003
Laccoliths are unusual igneous features that seem to occur in the stable interior parts of continents. They are concordant igneous intrusions that have domed the overlying rocks and are circular in plan, and less than 10 miles in diameter. This article deals with some of the laccoliths found in the scenic Colorado Plateau province of Utah, Colorado, and Arizona...

Making Adjustments to Catch Fine Gold

November 2013
This fine gold that is so common is probably the most notorious for eluding our riffles and mattings.

Melman on Gold & Silver

February 2010
As laws become cluttered, difficult to understand and almost impossible to enforce both effectively and economically, they are bound to drag down industry and commerce inside a welter of complications.

Lode or Placer: What Difference Does It Make?

September 2014
This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.

Arizona's Border Silver Camps

July 2001
Not much has changed along the original stage road that runs easterly from an old schoolhouse northeast of Nogales into the Patagonia Mountains of southern Arizona. Marked on the maps as Duquesne Road, the route has been in use for over 130 years, climbing from the hot desert floor to an almost 6,000-foot elevation pass before dropping back down the eastern slope of the mountains to reach the old mining camps of Washington, Duquesne, and Lochiel.

Romance of the Old Silver King

May 2001
One of Arizona’s richest silver producers was the fabulously rich Silver King Mine of Pinal County. This incredible deposit was first discovered in 1875 during the construction of the famous Stoneman Grade, which connects present day Superior to Globe, Arizona. From 1877 to 1888 the famous Silver King Mine was in operation and during that brief span of time it produced an astounding $16,000,000 in silver.

Mining Stock Quotes and Mineral & Metal Prices

July 2008

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