All Articles
VMS Deposits in Central Arizona
October 2004 by John Rothermel
Volcanogenic Massive Sulfide (VMS) deposits in the Central Arizona Precambrian volcanic belt occur within a felsic package of volcanic rocks capped by an exhalite unit comprised of cherts, iron formations and siliceous members.
Additional articles that might interest you...
The Many Facets of Iron
March 2013
I’ve been fascinated by iron minerals for many years. So let’s take a look at this very interesting and colorful element.
I’ve been fascinated by iron minerals for many years. So let’s take a look at this very interesting and colorful element.
History of Mining—Bradshaw Mountains, AZ (Part I)
November 2000
The Bradshaw Mountains, southeast of the old territorial capital city of Prescott, contain traces of many old mines and the railroads that were built to serve them.
The Bradshaw Mountains, southeast of the old territorial capital city of Prescott, contain traces of many old mines and the railroads that were built to serve them.
The Elusive Mother Lode
May 2004
With history so often repeating itself, you can’t go wrong searching for gold using modern exploration techniques and exploration theories in regions of historic gold activity.
With history so often repeating itself, you can’t go wrong searching for gold using modern exploration techniques and exploration theories in regions of historic gold activity.
Miners: Plan Ahead for Next Year's Taxes
May 2005
Many well-equipped prospecting or mining operations, those with adequate, up-to-date equipment, have discovered a secret: Uncle Sam, in the form of our tax laws, is eager to pick-up a portion of the tab for acquiring and modernizing the equipment necessary to operate a successful mining operation business.
Many well-equipped prospecting or mining operations, those with adequate, up-to-date equipment, have discovered a secret: Uncle Sam, in the form of our tax laws, is eager to pick-up a portion of the tab for acquiring and modernizing the equipment necessary to operate a successful mining operation business.
Ask The Experts—Using classifiers
December 2010
Q: I would like to know how to use a classifier when I dump my gravel into my sluice box. I would also like to know what sizes classifiers come in. I know that they are in sizes like -3/4. What does the “minus” in the size mean? Thanks for any help you can give me.
Q: I would like to know how to use a classifier when I dump my gravel into my sluice box. I would also like to know what sizes classifiers come in. I know that they are in sizes like -3/4. What does the “minus” in the size mean? Thanks for any help you can give me.
Key to Successful Prospecting: Confidence
May 2015
The one undeniable truth in prospecting is that the more time you spend in the field, the more gold you will find. Here are a few keys I use to help build my confidence.
The one undeniable truth in prospecting is that the more time you spend in the field, the more gold you will find. Here are a few keys I use to help build my confidence.
Subscription Required:
The Bawl Mill
• Update: Forest Service Interim Rule
• The Guyana Highlands
• Prospecting with a VLF-Type Gold Detector
• Freegold Ventures' Golden Summit Project
• Picks & Pans: Working the Crevices
• Molybdenum
• 2004 California State Gold Panning Championships
• Company Notes
• Why Environmental Groups Prefer Kerry
• The French Mines of El Boleo
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
