Polymetallic Skarn Deposits
July 2020 by Dean Delahaut
Polymetallic skarn deposits are an interesting class of deposits that can contain a number of different types of metals.
In an old mine that does not have stopes, you know the old miners did not take much if any ore out of that excavation. On the other hand, if you see large stopes within the mine you know that it is these places where the miners found profitable ore deposits within the vein.
The Beatty Mining District in south-central Nevada has been one of the most productive Mining Districts in the state, producing millions of ounces of gold together with silver, fluorite, mercury and other valuable minerals.
I thought it might be worthwhile to take a look at the basics of this important mineral separation technique and how a miner can use it to recover the values out of an ore.
The 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.
Environmental groups last year urged Montana regulators to impose the bad actor designation, and now are seeking to intervene in the case.
Even as late as 1906, Delamar was second only to Tonopah and Goldfield in production outshining many better known areas. Since the first discoveries, more than 700,000 ounces of gold have been produced from the mines here.
Miners are digging again where their forebears once unearthed riches from eight historic mines that honeycomb Sutter Gold Mining Company’s holdings about 50 miles southeast of Sacramento.
The Bawl Mill • Ask The Experts - Can GPR be used for lode prospecting? • Ask The Experts - How do I extract gold from pyrite? • Ask The Experts - Should I dig faint sounds with no indicator bars while detecting? • Ask The Experts - Should the detector sound on iron and nickel in a gold area? • Hard Rock 101: Micro Blasting • Sluicing and Detecting Downstream • Tips and Tricks • Gold Prospecting for Better or Worse: Does Caliche Grow? • 10 Keys to Prospecting Like A Pro • Practical Advice for Milling Hard Rock Ores • Speed Prospecting for Hard Rock Gold • Forrest Fenn Treasure Chest Finally Found? • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices