Can a detector signal on fine gold ?

[Outback]

If there is a couple of ounces of fine pin head & smaller gold sized gold spread out in say two 10 litre buckets of dry dirt under four inches of over burden in a natural trap situation ' can any detector signal on that gold ?

 

[stoyve]

Great question Outback, I've often thought of that myself.
Hope to hear an informed answer.
Cheers Steve

 

[isacol]

my minelab 1800 will pick up a signal in this situation on 20khz

 

[Guest]

What you will get is a gpx 5000 in fine gold will be ground noise
From this type of gold as if it is highly mineralised soil but could be this type of gold you are talking about. Even a vlf won't get this gold and I'm sure the sdc will struggle as well. In saying that, the Zed will be in the same boat. So there you have it Outback, now show us your new design of the dry gold concentrator.

 

[Outback]

What you will get is a gpx 5000 in fine gold will be ground noise
From this type of gold as if it is highly mineralised soil but could be this type of gold you are talking about. Even a vlf won't get this gold and I'm sure the sdc will struggle as well. In saying that, the Zed will be in the same boat. So there you have it Outback, now show us your new design of the dry gold concentrator.

Uncle Bob ' thanks for those answers , ground noises are not on my dig list .

That dry concentrator now exists , manufacturing is not sorted yet .

Cheers

Good to here your input Stoyve & Isacol .

 

[Ridge Runner]

With the GMT it will give you a lower ground reading if you hit a pocket of fine gold, So the Answer is yes,

Plus:-
I changed the coil on my GMT and it can see bits smaller than a grain of white sugar and about a 3rd of the thickness at about 3 inches, It is that small the only way to pick it up is to wet ya finger or use sticky tape. but using the standard coil it only sees it at about an inch.

John

 

[nuggetino]

I went out to a spot known for fine gold a year ago. Ran my GPX 4500 over an old gold mine and not surprisingly I didn't get any nuggets. I ended up panning down by the creek and didn't get any colour. I then remembered an area I'd got a lot of ground noise with the GPX and bagged up the noisey ground and panned it by the creek. Got lots of fine gold in every pan. Pretty sure the 4500 was picking it up as the surrounding ground was devoid of fine gold. Might be a feasible option if out panning and looking for the most gold rich sections to pan along the creek.

 

[Danielkrupski]

I'm interested in this too. What about a pin pointer if panning crevices trying to locate the richer cracks?

 

[Ridge Runner]

I went out to a spot known for fine gold a year ago. Ran my GPX 4500 over an old gold mine and not surprisingly I didn't get any nuggets. I ended up panning down by the creek and didn't get any colour. I then remembered an area I'd got a lot of ground noise with the GPX and bagged up the noisey ground and panned it by the creek. Got lots of fine gold in every pan. Pretty sure the 4500 was picking it up as the surrounding ground was devoid of fine gold. Might be a feasible option if out panning and looking for the most gold rich sections to pan along the creek.

That shift in the noise is what I was saying in the GB dropping on a metered machine, What you say about the ground noise is really worth remembering for all of us,

Thanks for pointing that out.

john

 

[user 1769]

With the SDC 2300 I sometimes get this unsteady, wavery, warbling higher pitched threshold. No improvement digging a bit. Could be ground noise... It's always on a defined piece of ground, and I've been wondering myself whether it could be finer gold or one or two nuggets that are JUST too small for the SDC to give a proper signal.
Not that I'd be wanting to waste my time searching for a piece of gold too small for the SDC to pick out, but if it was fine gold in good quantities...

M

 

[Outback]

Thanks Guys for your input .

If fine gold deposits could be found electronically ' it would open up a method to score better weight !
Just bag up the rich dirt & pan it later or use a concentrator on the spot

 

[Heatho]

My 5000 would groan over black sand on beaches, no reason it wouldn't do the same on goldfields where black sand or fine gold has accumulated I reckon. I thought exactly the same thing Outback when I worked out what was making it groan.

 

[Ridge Runner]

When these machines do this it's because it is Ground balanced to the Hot ground and when the mineral level suddenly drops your machine is now out of Tune, Which is another good reason to be running in Fixed, Just so you don't balance out that change,

For Example In the GMT/MXT manual the show you a picture about following the black sand and watching the meter and you want it to go as high as possible and then Drop off suddenly indicating where the fine gold deposit might be, So with machines that don't have a meter the only way to do this would be by hearing your GB suddenly drop off and that is when the machine becomes noisy And that is what the GMT/MXT is doing Visually on the meter,

Here is the MXT Manual, so have a look at the follow the Black sand Text,Pages/Picture, Around page 19 this will explain it, with the MXT it would have to be in Tracking to show it on the meter, And Machines like the F75 or any other with an FE meter can do this, hope it helps,

http://www.whiteselectronics.com/media/downloadable/files/samples/m/x/mxtpromanual.pdf

john

 

[KarlS]

Interesting topic. I would mix let say 2 grams of lead filings with some soil and spread it on the ground. Then try if 705 or SPP would produce any change in ground noise. Must try it one day.
Karl

 

[Ridge Runner]

Interesting topic. I would mix let say 2 grams of lead filings with some soil and spread it on the ground. Then try if 705 or SPP would produce any change in ground noise. Must try it one day.
Karl

karl, I think using a big coil you might need a bit more than that, But if it works on the 4500 it should work on both of your machine, even more so with a fixed Ground Balance, when you get time lets us know how you get on.

John

 

[GaryO]

Wasnt there a gold spike on the market at some stage that was designed for this purpose ?
Ill try search for one on google .

 

[GaryO]

Just found it. It was called a gold spear . They werent a gimmick because they actually worked but had limitations in rocky ground . The following video is a bit wanky but explains its use .

Watch "Goldspear" on YouTube
https://youtu.be/lrn2tfVBlOo

 

[user 4485]

Looks pretty gimmicky to me?

 

[GaryO]

It wasnt one of those ebay trick things Mat , it had a few floors but it could do what it stated it could.
They were pretty pricey to from memory so not many people tried them so they never kicked off.

 

[kanga1934]

i was at the Christmas gold mine at Wedderburn when Duog MCguire had it andhe put a jar of fine gold on the ground and my detector would not read it i think it was the Extreme i was surprised kanga1934