Friday, April 5, 2013

Placer Gold Mining Techniques: sorting out the boulders

Placer Gold Mining Techniques: sorting out the boulders

These are boulders that we had to sort out on a daily basis on a placer mine we worked several years ago. That is our 345 excavator  to compare the size and some of the boulders were 8 ft to 10 ft across.

Something that over the years I have seen quite a bit on limestone boulder placer properties  and I really don't have a good definitive answer for this yet........Gold flakes really jammed in some of the cracks.
Every boulder is not like this but a percentage is and it varies throughout the deposit as you work your way through it.

Flat flakey gold tends to really get jammed into some of the cracks on the limestone boulders. Every boulder is not like this but a percentage is and it varies throughout the deposit as you work your way through it. The part that is hard to get your head wrapped around..... is on some of these boulders 3 to 10 flakes are visible really jammed into some of the boulder cracks so tight that you have to pry them out with a knife blade.
Forget about washing these to get it, just a real interesting anomaly that I have observed on limestone boulder properties over the years. Remember to keep a grasp on the diminishing returns trying to get the last flake.