French Corral, California placer gold washing plant (above) in operation in 1983.
The pictured 10.6 ounces of gold were recovered from 500 cubic yards (750 tons)
of alluvial (ancient river deposit) gravel. At today's world gold price ($1700/ounce),
this yield would be valued at approx. $18,000.
French Corral - view south of the 400 acre property diggins. Brown area in the
distance is dry grass covering tailings of a 1980s operation. Lake in the
foreground resulting from an earlier mining operation is approx. 800 ft. long, 160
ft. wide and 25 ft. deep. This will be a primary source for washing the gravel to
win the gold. Upon conclusion of mining, it will have been expanded in size.
French Corral - view north showing the 40 ft. high cliff bank exposed from
hydraulic sluicing in the 19th and early 20th centuries. This bank is visible in a
photograph taken in 1909 shown in the Our Business section of this website.
From this point northward the gravels are undisturbed and have a depth from the
surface down to bedrock of up to 125 ft. At this location there are at least 1
million cubic yards (1.5 million tons) of unmined gold bearing gravel.
This photograph of gold depicts 7 different fractions obtained from screening. The largest nugget
fraction on the far left is known as +10 (10 screen openings to the linear inch, none of the pictured
nuggets could pass through this screen opening). The smallest pictured on the far right is -100,
meaning the pictured gold passed through a screen opening of 100 openings to the linear inch.
CNRC is developing modern methods of maximizing recovery of the -100 fraction gold.
French Corral - At the north face of the undisturbed gravel, the layers of the
deposit, like rings of a tree, show alluvial material-transported by water, washed
here millions of years ago. It is approx. 100 ft. to bedrock at this location. The
highest paying values and nuggets are to be found on bedrock since the heavy
specific gravity of gold caused it to be washed and settled to the bottom in this
ancient river channel.
|California Natural Resources Corporation
Discovering the Earth's Wealth