Prospecting With Color
December 2000 by Edgar B. Heylmun, PhDPerhaps no one factor has caused more confusion in the search for ore than the attempt to use color as a guide to prospecting. Yet, there is a reason for every color seen in rocks, so it deserves to be noted.
Alluvial fans are essentially dry land “deltas” which can be found in all climates. However, they are best developed in arid and semi-arid regions, where they may be many square miles in area. They are built up by outpourings of silt, sand, and gravel caused by seasonal run-off, as well as by boulders and cobbles carried by flash floods.
We received entries from readers in fourteen states for our contest to find out who has the oldest surviving copy of the Journal, originally named the California Mining Journal..
Silver Peak is a small mining community in Esmeralda County in west-central Nevada, about 30 miles west of Goldfield. Although it’s fairly remote, it’s been an important mining center since the early days.
• U.S. Gold Corporation
• AZCO Mining Co.
• Canyon Resources Corporation
• Placer Dome, Inc.
• Vista Gold Corp.
• Grupo Mexico
• Why rent when you can own?
• County taxed by tax error
• Military policy wins out over common sense
On our fourth trip, we finally reached the top edge of the old hydraulic pit, and it was monstrous.
Gold mining has received many black eyes from many scams, scammers and schemes throughout the years. Unscrupulous scammers have swindled naive people for millions of dollars in the past and will, no doubt, continue into the future.
The Bawl Mill • Letter to the Editor • Potaro District, Guyana • World Gold Council Launches $3 Million Ad Campaign • Prospecting for Platinum in Wyoming • Picks & Pans: More Big River Dredging in Northern California • Epithermal Ore Deposits Associated With Tertiary Volcanism—And the Feasibility of Metal Detecting for Them • A Changing Diamond Industry Looks to Canada for Growth • History of Mining—Bradshaw Mountains, AZ—Part II • Company Notes • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices