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 eagamesExpert Member
Posts: 3013
Joined: 15 Nov 2005
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 Posted: Fri Oct 09, 2009 2:41 am |
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 DickExpert Member
Posts: 5780
Joined: 21 Sep 2006
Location: Rialto, CA.
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| Posted: Fri Oct 09, 2009 9:11 am |
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One has to remember too, that pre-WWII, gold was between $12.00, and $35.00 an ounce. It just was too costly to mine it! I know of many mines that were shut down because of the war. They never re-opened. Placer mining is the cheapest way to mine gold, but unless you hit a nice big pocket, you won't make a days wages. (@ $35.00/onuce). Sliucing requires a LOT of water, just like dredging. One is done using pumps, to move the water to the river banks, (called "high-banking", and dredging is done in the river water, usung the pumps on the dredges. A "wet-suit" is also needed, and air, or a scuba-type breathing system. Another method was used, that does not require water, called "dry-washing". It, as the name implies requires the sand be as dry as possible. It is hot, dusty, and hard work, but it will show what is there to be found.
Ed, That is a very complete coverage of the AZ mining info. I had forgotten about it. The GPAA club is a good place to "try your luck", in any type gold mining operation, anywhere in the world. One doesn't need to have a "claim". The rights to work, and keep any gold you find, is part of the membership rights, and benefits. I miss my old haunts!
Dick
_________________
" Deja Moo: The feeling that you've heard this bull before".
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 KurtSSenior Member
Posts: 875
Joined: 15 Feb 2008
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| Posted: Fri Oct 09, 2009 11:16 am |
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| The Mount St. Helens is not a mineralized area, as we know it. The area is too ancient for mineralization, as far as I know. As opposed to the Bradshaw Mountains, of AZ, they are relatively young, (some 5 million years old, and they are highl;t minrtalized. Make that read the south-western part of AZ. You won't find mineralization up on the Coconino Plateau. |
Definitely the Cascadia is not mineralized in the same sense as Arizona.  Interesting to note that both gold and silver deposits are located inland from coastal volcanic activity, from the Cascades down to the Andes. I think this is due to gold/silver sourced in continental plates, and not oceanic plates--stuff I remember from college geology 
Bradshaw mts is just 5mya? That's very young in geologic terms! I once read up on the Sierra Mother Lode, and the geology is an incredibly complex layering of different formations, with the gold-bearing area around 150 mya. No wonder prospecting and large-scale mining is such difficult work! There's always something new to learn on this subject.
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DickExpert Member
Posts: 5780
Joined: 21 Sep 2006
Location: Rialto, CA.
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| Posted: Fri Oct 09, 2009 2:22 pm |
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Kurt, I just read your post, and what little I know of geology, can be weitten on a postage stamp! I quote from having read, many years ago, so it is not "Gosphel"! LOL. The nice thing about this posting, is that I make a statement, and get more up to date info in return, and learn a bit more., from the posts others make.
The hard part of the finishing that I am puttung on the cabinests is very hard, because I can't make precise measurements, and get it right, each time. I am reduced to making rough cuts, and then putting the materials in place. Then trimming by hand, to fit the existing backing. Crude, but effective. Cheaper, too. I had an estimate for the same thing I am doing, except for the new facing on the other cabinets, . It was for $1650.00, plus materials. I couldn't "hack" that, so I did it the hard way. I still have all my fingers, so it hasn't been a total loss! Time for a break! I'ne been at it since 7 AM.
Dick
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" Deja Moo: The feeling that you've heard this bull before".
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