Gold Samples and Placer Evaluation (Part 2)
(There's gold in this ground...using trusted sampling methods can tell you how much.)
Here's the second installment in my series of posts on placer gold sampling and valuation and in it I'll be directing my attention toward placer evaluation methods, including the block and triangle methods, so read on.
In the block method, placer samples are taken from test pits having the same lengths, widths, and depths. These "blocks" can be quite small or they be large scale...it really doesn't matter as long as the blocks are uniform across the board.
Gold Panning Kits
(Let me know if you find the following confusing, as one reader did. I took this material straight from a good source but my "translation" may be the culprit here.)
Anyhoo, here's what I made of the block method:
- First, determine the volume of each block by multiplying the length times the width times the depth.
- Next, multiply the volume by the gold values per cubic yard.
- Use the sum of the gold values as your "total" value.
- Find the AVERAGE VALUE of your ground or claim by dividing the TOTAL VALUE by the TOTAL VOLUME of your gold ground or claim per cubic yard.
The triangle method is just that...you dig or drill three holes in an equilateral triangle with the holes forming the point of each part of the triangle.
- The triangle's volume equals the average depth of each hole times the area of the triangle.
- Average gold content for the triangle is equal to the gold values taken from each hole times the depth of the three holes divided by the total depth of the three holes combined.
- The total volume is equal to the sum you derived in the first step.
- The total gold content is equal to the total volume times the average you derived in step two.
- The average gold valuation you can expect equals the total gold content from step four divided by the total volume in step three.
Worth the Time, Money, and Effort?
I know some of you are sitting there scratching your heads, but if you're deadly serious about making money from placer mining then these methods are proven ways to determine if the expected gold values you'll get are worth the time, money, and effort.
(Block test pit.)
Don't believe me? That's OK, but just take a look back at some of the TV gold mining crews you're familiar with from the Discovery Channel. If those bonehead wannabes had done systematic sampling up front, they'd have saved boo-coo money and gotten good gold much quicker.
That's my view, anyway.
If you liked this post, you may want to read: "Gold Sample Values and Placer Evaluation (Part 2)"
(c) Jim Rocha (J.R.) 2013
Questions? E-mail me at firstname.lastname@example.org