The Seven Troughs Mining District
September 2016 by Chris RalphThe favorable geology of the northeastern and central parts of the Seven Troughs Range are the parts most interesting to prospectors. They are underlain by a thick sequence of Tertiary volcanic rocks, mostly rhyolites and andesites.
Historically, Montana has been an important gold producer, in terms of both lodes and placers, and it still produces gold for the prospector today.
Gold discoveries in the Montana territories sparked a frantic stampede to these bonanza destinations in the early 1860s. Hughes Creek is located in Ravalli County, which is located in western Montana, and the gold here is...
Most placer equipment is really made with gold in the 30 and larger mesh sizes in mind, though if carefully used can often get reasonable recovery down to the 50 mesh size.
On my weekends off I spent many hours dredging the Second Broad River from Cane Creek Road up to the headwaters. I used a three-inch dredge with air and graduated to a five-inch with air.
When I started dredging a short distance downstream from that feature I realized that I was into a major paystreak and much of the gold was coming right out of the upper gravel. I could see the chunky pieces falling out of the gravel as they were pulled into...
...most prospectors don't even think about the conductivity of minerals, but there are some that do conduct electricity to a certain degree, so metal detectors will respond to them.
The Bawl Mill • Our Readers Say • Ask The Experts: Is there a safe DIY alternative to cyanide or mercury for extraction? • Ask The Experts: Should I take my claim access problems to the Desert Advisory Council? • Ask The Experts: How do I identify gold in hard rock that may be mixed with other metals? • Ask The Experts • Ask The Experts • Legislative and Regulatory Update • Pickers and Nuggets • Modern-Day Claim Jumping • Oregon's Waldo and Galice Mining Districts Unite • Attention to Detail - Part II • CA Supreme Court Rules Against Rinehart - But There Is A Solution • Summertime Gold Panning • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices
MMAC & PLP Update