Conrey Dredge No. 4
November 2017 by Don Madore
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.
Lately my mind has been involved with group 4 of the transition elements, namely titanium, zirconium, and hafnium. They all have similar chemical properties. Of greatest interest to economic geologists and miners is that these valuable elements often occur together in sands.
Potholes in bedrock can trap placer minerals and even be glory holes. They are, at least, interesting geologic phenomena, and at best, a treasure trove of gold nuggets.
I couldn’t wait to get started. With no field budget, an assay budget of $100/year, a 1975-Ford Bronco that was a road hazard, a gas card, a topo map and full support of the director, I headed to the State Line district near Tie Siding along US Highway 287 to begin mapping kimberlite.
...I would bet considerably more lode gold and silver remains to be found in this area, and there are possibilities for small placers and nugget shooting.
An example of some of this extraordinary ore was a lot of about four tons from the Florence mine during the last days of a lease that averaged over 300 ounces of gold per ton.
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.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts - How do I work this glacial deposit? • Ask The Experts - How do I best recover gold in pyrite? • It Pays to Know Your Bedrock • BLM Cancels 10-Million-Acre Sage Grouse Mineral Withdrawal • Take it to Bedrock • The Beatty Mining District of Nevada • Flood Plain Gold Deposits—What Are They Really? • Exploring Iron Oxide Copper Gold Deposits • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices