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.
Strong gold prices are making it profitable to keep the Golden Sunlight Mine here open through 2015, company officials said.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
The great mining geologist Waldemar Lindgren used the word “epithermal” to describe a type of quartz vein commonly found in desert regions of the United States and Mexico.
As he was working near the extreme low end of the ground sluicing, I heard a yell through my headphones. Making my way down to him I could see the smile from a long distance.
Some fellow in Texas was selling a Spanish needle—a dousing device used to recover minerals in the old days. Do you know anything about these?
Well, this is it, the dawning of the new Millennium. By the time you receive this issue, we will be on the threshold of a new year, decade, century and thousand years. The last people to enjoy such a time were those who lived in the year 999—but there was a staggering difference. At that time...
- “Burglar” makes a clean getaway
- $12 billion per month!
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