Resurrecting An Old Hard Rock Mine—A Series of Small Victories
February 2019 by Ron Kliewer
…we cheered and high-fived each other as the ore cart slowly crested the top of the headframe, then picked up a bit of speed on the short downhill section and came to an abrupt halt, ejecting its contents of ore…
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.
In last month’s issue we covered the initial discovery of gold, the subsequent gold rush that occurred around Nome, some of the geology of the area and past production. We’ll conclude the article in this issue with a further examination of the geology and deposit types, discuss the resources...
Old mine workings and tailing piles can represent opportunities on many levels, from the chance to simply find a nugget on up to the commercial reworking of the old tailings for profit.
The excavator or backhoe has become the tool of choice for testing placer ground. These machines are the best way to explore and sample a placer deposit if the ground is not too wet or frozen and bedrock is not beyond the reach of the machine.
After he excavates the ore down to bedrock, he goes over the bedrock with a metal detector to ensure he didn't leave any gold behind before he backfills the area.
Centrifugal bowls versus jigs
In part one of this two-part series on gold in Guyana, I describe artisanal mining efforts currently winning alluvial gold from small-scale placer operations located along the lower Puruni River and its tributaries.
The Bawl Mill • Ask The Experts - Do I need something other than a fire assay for PGMs? • Ask The Experts - This low-grade ore is not worth processing • Placer Gold Deposits of New Mexico • The Hunch • The Basics of Exploration Leases and Contracts—Part I • Gold Prospecting for Better or Worse: A Long Hike • Mutiny on The Mason • Who Jumped Whose Claim First? • The Value of Evidence • Over The Divide: Charles "Chuck" Cushman • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices