On Sunday I decided to isolate the clay layers we were digging into and test pan them to find out which one is hot and carrying the chunky pieces.
The first set of test pans I did 3 pans of 3 layers (small gold pan of sample clay for each). One blue/grey clay layer with bright red/pink spots in it. One orange/rusty layer and one dark green/rusty layer. I didn't take pics of the first set but I determined that the orange and green rusty layers were essentially the same material and same gold content.
For the second set of tests I did 2 pans. Blue/grey layer in one pan, green and orange rusty layers in one pan. Result were similar to the first run.
First test pan is the blue/grey clay with bright red spots.
Click to view attachmentI worked the clay through a 1/2 inch classifier into my large gold pan and washed the clay away by hand. I found this stuff fairly easy to work the gravel out of the clay.
Click to view attachmentThere was not a lot of black sand in the pan and was fairly easy to pan and had good looking gold.
Click to view attachmentSecond test pan was the orange and green rusty stuff.
Click to view attachmentI found this clay a bit harder to work the clay out to clean gravel. It had lots of black sand, heavy rocks down in the black sand and I found it hard to pan out the 3 specks of gold.
Click to view attachmentSo on Memorial Day I ran a few buckets of the blue clay. The fist bucket had surface gravel mixed in but looked good still.
Click to view attachmentThen I ran a bucket of the clay while making sure to get almost all clay.
Click to view attachmentMy final take for the weekend. My scale is not very accurate but it came in at 0.3 grams.
Click to view attachment