Greenstone Belts in Minnesota
August 2005 by Edgar B. Heylmun, PhDGreenstone is a dark greenish-black basaltic rock which, along with chloritized schist, forms belts up to 50 miles wide in northern Minnesota, in rocks of Late Archean age. Most belts are 2.6 to 2.9 billion years old.
Gold in Iceland?
Normally, one does not look at volcanic islands in a search for gold. However, rich gold deposits have been found in or near volcanoes at Lihir and Misima Islands near New Guinea, so one cannot dismiss gold opportunities on volcanic islands. All of Iceland is of volcanic origin, with acidic volcanic rocks like rhyolite and granophyre being present at a few localities.
Over The Divide—Merwin (Merv) H. Hemp
It is with great sadness that we inform you of the passing of one of our long time members and tireless workers, Merwin H. Hemp.
The Potholes—California’s Oldest Known Mining District
Every time we prospected here we found gold, sometimes some really coarse flakes, but no large nuggets (yet).
Finding Gold with a VLF Detector—Part III
The higher the sensitivity setting, the louder and sharper the signal from a gold nugget or other metal target.
U.S. Dept. of Interior Inspectors in Arizona
Glynn Burkhardt, president of the Arizona Small Mine Operators Association, has a small mine outside of Tucson, Arizona. He recently received a visit from U.S. Department of Interior...
Sampling, Hydro-Shocking & Cleaning Quartz-Gold Specimens
Many specimens have a small amount of gold and are not pretty to look at. There is a nifty way to give them a makeover and make them much prettier than they were when you found them.
Miners Attend Meeting in Myrtle Point, Oregon
It was "standing room only" as a crowd of approximately 50 interested miners attended a meeting hosted by the Powers Ranger District and Forest Service personnel from the Siskiyou National Forest.
The Bawl Mill • Our Readers Say • The Paradox Basin—Part II • A Sleeping Giant • Buying a Used Gold Dredge • Looking Back • Gold in Vermont • Picks & Pans: Prospecting on Perry Creek • 9th Circuit Court Hears Pilgrim Family Case • The First Mine in America • National Mining Hall of Fame to Induct Five • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices