Precious Metals in the Patagonia Mountains

August 2003 by Edgar B. Heylmun, PhD

Southwest Alaska Gold Project Progresses

January 2012
NovaGold Resources Inc. announced that a gold prospect in southwest Alaska is ready to advance to permitting.

Epithermal Ore Deposits Associated With Tertiary Volcanism—And the Feasibility of Metal Detecting for Them

December 2000
Epithermal ore deposits are common in regions of late volcanic activity, especially areas associated with Miocene and later Pliocene extrusive volcanics that have not been deeply eroded since the ore was deposited. Many are simple fissure veins, but stock-works and ore-pipes are also common.

Melman on Gold & Silver

May 2006
If there was one theme underlying many of last month’s headlines, it was millions of people on the march. Throughout France, students, union leaders and run-of-the-mill rioters created havoc as millions marched to protest a new law that would give employers the right to dismiss unsatisfactory youthful employees during their first two years of service.

The Trapiches of Chile

October 2000
In Chile, the trapiche (tra-peach-ee) method of milling gold ore began more than 400 years ago. The first trapiche, also known as a Chilean mill, was a stone wheel weighing two or three tons rotating on an axle.

Legislative and Regulatory Update

September 2011
• Salazar pushes wilderness
• California Governor signs AB 120

Ask The Experts: Can you help me identify these items?

June 2010
Q: Can you help me identify these items?

Greenstone

August 2004
Greenstone is a hard, tough, altered igneous rock, usually dark green in color. The term “greenstone” has been loosely applied to all greenish rock, including peridotite, dunite, jade, serpentine, and even hydro thermally altered rocks in mining districts. True greenstone is...

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