New 49er     


:: :: OK, Let's Talk Mining!
Lost Password :: Posting Pictures :: Who's Online :: Stats :: Memberlist :: Top Posters :: Search



Make a donation to our message forums through Paypal


Make a donation to our Legal Fund.

 

Photobucket

Welcome, Register :: Log In Welcome to our newest member, hubberjonas.

people online in the last 1 minutes - 0 members, 0 anon and 0 guests. (Most ever was 34 at 15:22:43 Fri Sep 10 2021)

Pages: [ 1 ]

[ Notify ][ Print ][ Send To Friend ] [ Watch ] [ < ] [ > ]

micropedes1
Offline
149 posts
Reply
OK, Let's Talk Mining! ( 19:51:15 SunDec 14 2008 )

After a less than spectacular season of working meager shallow deposits, I think that it is way past time to do some deep water dredging. I'm talking 20+ feet of water.

I am accustomed to finding gold in the shallow bends of the river. Now I need help finding them in the depths. Assuming that I have all the necessary equipment, where do we start?

  
rlh1946
Offline
427 posts

Reply
Re: OK, Let's Talk Mining! ( 21:09:21 SunDec 14 2008 )

1st a dredge with air. prob. should have at least a 5" or 6" I would want a 8" but not all rivers allow a 8". and a dredge tender. plus alot of other stuff
[1 edits; Last edit by rlh1946 at 21:11:10 Sun Dec 14 2008]

  
RUSTY_HAPPY_CAM
Offline
684 posts
Reply
Re: OK, Let's Talk Mining! ( 03:56:49 MonDec 15 2008 )

Hay Glen if we use your 8 again I volunteer as tender. That flair is pretty comfortable. Don't know if I could take a full day of napping on it, but I will give it a try.

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 15:58:08 MonDec 15 2008 )

Rich doesn't know me cause I don't post that much. Rich, I go with a very well-supplied toy box and I don't usually mind sharing. Here is a pic of Rusty's favorite napping site. The 5" only got used as a cleanup place for the LeTrap.

  
Real49er
Offline
228 posts
Reply
Re: OK, Let's Talk Mining! ( 16:13:10 MonDec 15 2008 )

Mighty fine lookin' rig. Think I'd sling a hammock corner to corner under that cover, if you were in need of my "assistance"!

  
rlh1946
Offline
427 posts

Reply
Re: OK, Let's Talk Mining! ( 16:38:31 MonDec 15 2008 )

Glen, your right on, sorry I wasn`t more informed.
That is one nice set up you have there, I have a 2", a 4"
& a 6" always wanted an 8" and still do. Been at it almost 20 years , retired now and put in all the time I can, ran my 6" 65 days straight last summer, heck I will even throw my hat in to be your tender.

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 05:45:17 TueDec 16 2008 )

You guys are always welcome; that's what the spare dredge is set up for.

But it doesn't answer the first question: how do you find paystreaks in deep water? There are different stream dynamics at work down deep.

  
socalgold
Offline
701 posts

Reply
Re: OK, Let's Talk Mining! ( 15:31:22 TueDec 16 2008 )

Glenn, with 80 feet of water to the over burden that you have there. (for those who don't know, it was checked with a depth finder). I would say to get a hard suit and send Rusty down and you lay in the hammock. Every time he comes to the surface just beat him over the head with a pry bar and send him back down.
Seriously, like I said last year, I would try at the head end of that hole and see what was there. You might be able to get in there where it isn't quite as deep. Otherwise get your slide rule out and start figuring out how to make a hydralic remote controled unit similar to "Nessie" that Keene makes.
I would imagine the same hydralics of the river would apply in that canyon also, although I don't understand why you ended up with such a deep section right there. You can't get in below there where it is shallow and remove enough material to lower the water upriver enough to do any good. Besides you don't have the lower claim anyway.
Bout the only way to work any of it would be with a dragline and you know that will never happen in todays world even if you could get one down there.

Lee


  
RUSTY_HAPPY_CAM
Offline
684 posts
Reply
Re: OK, Let's Talk Mining! ( 16:23:55 TueDec 16 2008 )

Wow, the lost has returned! Lee we thought you had dried up and blew away, that happens with serious HOT AIR leaks. You must have got the computer repaired. It is good to match wits with you again, even if you only come half prepared.

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 17:14:10 TueDec 16 2008 )

Hey! He's baaaack! Been missing you around here, Lee. Much too quiet.

One of those holes on mine is "only" 50 feet. The 80 footer is not on mine. I'm not planing on dredging that deep anyway. What I need help with is locating paying gravel 20 feet down when there are no sand bars or inside bends like the classical shallow locators.

Things like pressure and suction eddies during high water come to mind as places to check out. But what else?

  
Jim_Alaska
Offline
1928 posts
Administrator


Reply
Re: OK, Let's Talk Mining! ( 17:33:07 TueDec 16 2008 )

Glen,

Lee is right on when he says try the head of that hole. Remember that any transition of depth relates to a low pressure area just as much as an obstacle or bend in the river. That's why the material is so deep there. It is slightly different than other types of low pressure areas however.

You should pick up any existing gold line starting at the head of that deep area and if there is a paystreak there, it should give you a better showing of gold as you move into the low pressure area.

If you find decent gold when you move into the actual low pressure area, it will probably be in separate deposits simply because it is the type of low pressure area where flood water can't move the material that is in the hole, so it just builds up over time. It just deposits more material until it is of a depth that flood water can move the top of the deposit,

Watch for changes in the material (color and density) as you go down. Be especially mindful of any gray or blue material, many times this is a indicator of a paying deposit.



---
Jim_Alaska
Administrator
jfoley@sisqtel.net
 
 
chickenlip_willie
Offline
706 posts
Reply
Re: OK, Let's Talk Mining! ( 18:04:15 TueDec 16 2008 )

Well here we go again, "Rusty" picking on poor Old "Crusty"!! Come on Lee, don't let Rusty pick on you that way.

  
Real49er
Offline
228 posts
Reply
Re: OK, Let's Talk Mining! ( 20:04:28 TueDec 16 2008 )

Seems to me, with those kind of depths, the remote nozzle concept is what you need to be working on this winter. Otherwise you'll be spending too much time decompressing, but the potential in such a hole does seem tremendous for continuous accumulation of larger material.

Do a run across the apron leading into the hole, at a workable depth, as previously suggested, then follow any paystreaks you find on into deeper water with a nozzle controlled from the surface with levers and pulleys. Dive down as required to get a good look at what's what and deal with waste rock, or to plan your moves around the next boulder.

Sounds like quite the project, good luck with that!

ps I think willie might be trying to stir up some "stuff"!

  
rlh1946
Offline
427 posts

Reply
Re: OK, Let's Talk Mining! ( 23:53:15 TueDec 16 2008 )

where to start in this pic? Not much material on lowwer side of pic too swift at high flow smooth bottom. I did dredge a few days along the other shore side not much pay
thinking I will have to take out all of those cobles in the middle, something made them stop there ...right?
.
http://img.photobucket.com/albums/v620/rlh1946/DSCF1513.jpg

  
socalgold
Offline
701 posts

Reply
Re: OK, Let's Talk Mining! ( 01:30:37 WedDec 17 2008 )

Jim, you just have to understand that the old Rusty Bucket don't have any smarts and is jealous of those of us that have 1/2 a brain. Anybody that dredges isn't all there as we all know, and considering how long I've been at it, I don't have a whole lot left to spare.
Jim_Alaska can verify that. After dinner with that animal AJ last night, I guess I am really insignificate. He sure can get those rocks and boulders out of the way. I am not about to argue with anybody that picks up a washing machine with one hand like he did.

  
chickenlip_willie
Offline
706 posts
Reply
Re: OK, Let's Talk Mining! ( 03:36:55 WedDec 17 2008 )

Lee, you mean Rusty wouldn't qualify to be a J.B.Hunt driver when it comes to smarts? and Jim_Alaska can verify it? I hope I'm understanding this correctly.
You had dinner with AJ, man that boy can put it away!!! Don't let Rusty pick on you,and you and Anita have a great Christmas and a good New Year. ... Jim ...

  
socalgold
Offline
701 posts

Reply
Re: OK, Let's Talk Mining! ( 14:16:55 WedDec 17 2008 )

HE COULDN'T EVEN GET ON AT SWIFT OR SCHNIEDER

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 00:04:35 ThuDec 18 2008 )

I must be getting senile as well. The last paystreak that I found was on the upstream end of one of those big holes. The lower end of it lay exposed on top of a rock shelf. I thought that it was just a fluke as I just stumbled across it while exploring the bottom. Maybe I ought to get some more hose and explore the deep hole where it ended.

Anybody ever use a "bubble ring"??

  
RUSTY_HAPPY_CAM
Offline
684 posts
Reply
Re: OK, Let's Talk Mining! ( 00:41:31 ThuDec 18 2008 )

If you have enough CFM it works great. I have seen an air lift throw 8" chunks of coral 2' out of the top end of the tube with a lift of 65'. We were running a big Joy compressor with something like 125 CFM. The deeper the better it works. I am not sure small gold would like all the air, probably make it float through the box.

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 03:52:24 ThuDec 18 2008 )

A bubble ring is kinda like an air lift, but not exactly. Its a trick that I picked up from Hoser John for deep water work. Use a copper tubing ring around your intake to inject just enough air to lighten the slurry. That way your jet can more easily lift a heavy slurry. Often without the need for a second midstream jet.

But you are right about the need to get the air out. Works best on the older crashbox headers.

  
RUSTY_HAPPY_CAM
Offline
684 posts
Reply
Re: OK, Let's Talk Mining! ( 08:11:25 ThuDec 18 2008 )

The air lift principal works best the closer to vertical you get. Never tried it on a dredge but I am sure the box or flair would cause problems. When you try to use it on horizontal tubing the air runs along the top and leaves the solids behind. That is why high CFM is needed. The more CFM the more material is sucked along as the air rushes to the surface expanding as it rises. I have never used it with a water pump, only as a stand alone or in combination with vacuum.

  
UncleMark
Offline
531 posts
Reply
Re: OK, Let's Talk Mining! ( 23:12:21 MonDec 29 2008 )

Glen,
I just got hooked up to the internet at home ! Anyway, have you given any thought to using an additional jet located between your nozzle and main jet? I don't know if it would work as I have never tried it myself, though I know the technique is used to transfer slurries in other mining systems.

Mark

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 05:04:52 TueDec 30 2008 )

Mark, I understand about using a second jet and I have the motors/pumps to make that happen. Gotta do it for about every 30 feet of depth.

My question was about how to locate that next paystreak in deep water. I have walked the bottom looking for irregularities. Mostly, it is 20 foot of water bank to bank. And no exposed boulders sticking out of the oerburden. Other than the deep holes, what do you look for?

  
UncleMark
Offline
531 posts
Reply
Re: OK, Let's Talk Mining! ( 11:14:03 TueDec 30 2008 )

My experience has taught me to start punching holes until I find one. I understand how difficult it will be to do a methodical sampling patern in that deep of material, but I know of no other way to locate a paystreak. As others have written, if you know were the payline is upstream or downstream, use that knowledge to locate your first sample hole. I like what Jim had to say about the first place it shoots deep sounds good, but that could also be a blowout that started the deep conditions you have on your claim and filled in with valueless material after the gold dropped out in a major fload event. Your question is the most common one we all ask, and the day I meet someone who can point and say "there is a paystreak right there" I will make him a rich man. Until then, sampling holes in a methodical pattern based on your best guesses is it.
Mark

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 16:04:02 TueDec 30 2008 )

I deserted my last paystreak when the overburden got upwards of 20 feet deep. Too much material to make recovery worthwhile. Sigh!

But you're right. I am gonna use it as a starting point and try to locate the same line farther upstream near the beginning of the gravel bar. Sample. Sample. Sample.

  
UncleMark
Offline
531 posts
Reply
Re: OK, Let's Talk Mining! ( 16:34:35 TueDec 30 2008 )

Alright Glen,
I have another thought for you. Have you ever played with magnatometers? I know people were playing with this idea 15 years ago, but I never heard the outcomes. In theory, a mag will give a reading, that compared to other readings would let you know if this spot had more magnetic material or less than another spot. So if you took a grid aproach on the river, using GPS to map the readings, in theory you might be able to locate a magnetic black sand deposit. All us experienced miners know how hard it is to free gold from black sand, so locating a blacksand deposit would almost be a sure thing for a paystreak. The posibility could be worth futher research.
Another idea,
What about using an underwater metal detector to locate the heavy line in that stretch of river? There should be a readable amount of buckshot,birdshot and fishing lead that should be located in a heavy line close enough to the surface for a metal detector to read.
Just a couple of ideas.
Mark

  
micropedes1
Offline
149 posts
Reply
Re: OK, Let's Talk Mining! ( 17:27:58 TueDec 30 2008 )

I like the metal detector idea. The thought had never occurred to me to find the birdshot line and look for the gold streak nearby. Underwater Minelab suitable? Anybody know the sensitivity or depth reading on those things?

Magnetometer is a sure thing, but seriously expensive. Plus, it is bulky and somewhat difficult to interpret results.

  
UncleMark
Offline
531 posts
Reply
Re: OK, Let's Talk Mining! ( 20:12:33 TueDec 30 2008 )

There is a mag for sale on 49er Mikes,
click here to 49er Mike's
Mark

  
RUSTY_HAPPY_CAM
Offline
684 posts
Reply
Re: OK, Let's Talk Mining! ( 22:29:53 TueDec 30 2008 )

I don't think that mag would work for the type of material a dredger would be working in. Those type of hand held units are best at locating manhole lids and shallow buried pipe lines. The larger tow fish type units put a much stronger signal to shoot through feet of overburden and read the heavy magnetics underneath. However, Glen you are correct about the cost and interpretation. Here is a link to a brand I have experience with. http://www.jwfishers.com/

  

Pages: [ 1 ]

[ Notify ][ Print ][ Send To Friend ] [ Watch ] [ < ] [ > ]

 Total Members: 4903

  • Can't start a new thread. (Admins Only)
  • Can't start a new poll. (Admins Only)
  • Can't add a reply. (Admins Only)
  • Can't edit your posts.(Everyone Registered)
  • Register :: Log In :: Administrators

    The time is 08:19:31 Mon Jul 4 2022

    Powered By BbBoard V1.4.2
    © 2001-2007 BbBoy.net
    [Most Recent Quotes from www.kitco.com]

    [Most Recent Quotes from www.kitco.com]