Gold, Quartz & Chalcedony—Part II
November 2011 by W. Dan HauselThe specific gravity of chalcedony is 2.58 to 2.64. This is slightly lower than coarsely crystalline quartz because of slight porosity in chalcedony. Being so light, it will easily wash out of a gold pan.
The Gold Rush in California called hundreds of thousands of souls to leave their homes to journey to the the far reaches of the West. At first the rich goldfields of the Sierra Nevada beckoned to these adventurous pioneers.
Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.
Prospectors who specialize in electronic detecting for nuggets in desert areas are especially interested in this type of deposit, as it yields nuggets that are close to the surface of the ground...
Most gold-bearing veins in this region are controlled by fractures associated with the Melones Fault, a late Cretaceous structure that is 108 to 127 million years old.
...these nuggets have not traveled far from the lode because the golden wire lattices would have been torn apart or flattened during weathering of rock and deposition by violent stream action.
When placer miners from the gold rush era began experimenting with the slope of their sluices, they must have pondered the ideal slope for trapping gold in a creek bed too. Logic suggests the same is true for streams...
The large buckets were favorable for the type of ground worked. The gravel was tenacious and compact, due to the existence of irregular pockets of clay.
The Bawl Mill • Legislative And Regulatory Update • Ask The Experts—Compensation for closed mining claim? • Ask The Experts—Inconsistent fire assays • Gold From Cemented Gravels • Evolution Of A Gold Prospect • Alaska to Target Rare-Earths • Minnesota Delays Decision on Mineral Leases • Alaska's Cripple Creek Mining District • The Gold Of Horseshoe Bend • Tyrie's Roadway Nugget • Melman on Gold & Silver