A real head scracher

[C-Bob]

Hey
I got a question. I was MDing the other day, it was raining and I was out in a old horse pasture. I would get a strong signal and dig it but nothing, so I turned the sensitivity down to almost nothing and the signal was still there in the hole. My detector read 6 inches I dug a foot and nothing. This happened 4 times before I quit for the day. If it helps my detector is a bounty hunter land star. Also the was no fence or power line around(Maybe under ground through). If you guys have a clue to what this might be please let me know. Thanks.
C-Bob

 

[Gabbit]

Sound like it might be hot rocks or maybe your metal detector -- I would take it to another area and see if you have the same problem. It was raining in Laramie Graduated from UW

 

[Crutch]

Hot rocks can be pinpointed after detected however cold rocks go away when you go into the dc mode to pinpoint.

 

[hollowpointred]

ground mineralization maybe? i guess it could have been the buried remnants of a barbed wire fence.

 

[weldermark]

or maybe the target is big and deeper.



HH Mark

 

[EDDE]

hallo effect maybe disturbing the soil changes the signature making it smaller and harder to find....

 

[C-Bob]

Hey Guys
Thanks for the advise. I haven't been back out so I don't know if it is my detector( I don't think it would be since I just got those few strong signels that weren't that close to each other,Right) It might be my pinpointing style, I grab the detector right above the coil and get on my hands and knees and sweep the coil around. Also what are hot and cold rocks? And can someone explain ground mineralization, and how it affects my detector. Also it has been raining a lot the last couple of month's gabbit, but we have been in a drought and I like it a lot better than the snow. Thanks again guys.
C-Bob

 

[cptbil]

C-Bob !
Believe me!
There are pages and pages :P written about those very subjects !
I.E. : Hot/cold rocks, ground mineralization, effects on MDs, compensating for, etc !
Although, your MD manual should talk about them !

 

[Digger Joe]

All of the above, but 'Vito' hit on something for all to be familier with and to Never forget. True treasure hunting

'A residual Halo is destroyed by the dig'.

What is that, and what does that mean?

Listen to this: I was looking for an old true story of a nice size burial on the side of a little hill one time and hit audio with my pulse machine that measured four feet x four feet square an almost pooped my pants.

In the process of trying to hang on to everything inside me and de-tuning, an de-tuning to way way below threshold and then some, I still had audio. - Being familer with the above possiblilty that Vito mentions We dug it 5 feet x 5 feet down 6" only, and re-audioed; and no more audio (zero), none, anywhere.

I then put the exact same dirt back in the six inch hole and re-audio'd. NOTHING, Zero audio.

Wow wow wee.
That is called residual audio, and is something the old dug soil of a past true burial that has already been transfered sets up that Very few people are familier with. ~ The ground is changed from the past precious metals burial; and in the past after whoever got the target, and the dirt was filled back in, the 'halo' word comes from that the exact spot will also set itself up with a 'halo' ring that will even tell you the depth of the last burial, now transfered.
(But of course Nobody believes in LRL, hehe)

And thats your college class in cache hunting for today, and Thanks for your imput Vito.

 

[Digger Joe]

OK, thats fine, but I want to remind everyone that from those high minerals of rusted metal if thats what it was that time, that there was no longer Any audio at all, and, not even de-tuned. Zero.

I would like to also remind us that though the years men have broadened and widned the English language, and I personally will do it (personally) here at this time.

An then lastly I will say that there are Very few men or ladies reading this that have any experiance in testing spots of 50 kilos in Mexico before and after the digs.

And Thank you, and everyone have a good day.

 

[guest]

Tnx for the flowers, Joe.

Fact is, everything which is reacting with somewhat (like oxydation) is building some new. If it?s in the ground it?s building a ?halo? even silver and copper.

I know about some iron artefacts plated with silver where the silver was gone in the ground during the long period they were buried. (Like an protecting silver electrode).

This all will take a few hundred years, not a couple of.

You even may detect fire places on clay. During the oxydation the clay becomes a readable spot for the detector causing to the changed mineralisation.



Njoy

 

[Digger Joe]

Thats a nice simple answer SWR, but it is not that brief or easy.

I would guess that even as knowledgable as you are, that you do not have first hand field experiance with long term large buried prescious metal targets.

#1 I am running a pulse machine that LOVES Iron, and yet when passing audio on the transfered dirt at not de-tuned de-tuned de-tuned threashold as before, but at threshold audio hum, I will have NOTHING, and is different than what Vito and I are talking about in the above. ~ You will never fully believe it untill it happens to you personally. The audio detection of the area is coming from the soil area that used to hold a long term buried catch. (Has Nothing to do with iron or metal. ((It can have, but not in what I am speaking of in the above.)) When the ground is disturbed the area is 'broken' from sitting there for years being undisturbed, and in the breaking (like a bubble) what the ground conditions had set up, the audio is gone. (Believe it or not, What I am speaking of has nothing to do with any metal or iron. And is known as a 'Pure Residual'.)

Secondly, all metals of anykind (yes at different rates), but all metals of any kind through the years will start acting in the ground as radioactive isotopes and set-up rings. Forgive me for using the word 'educated', but certain men are not in any way yet prepared for any of the above, for they haven't had the experiance or need to understand it since they are only searching with hanheld pulse or VLF machines.

(While some are laughing, there are some more 'professional' in certain subjects, working. (One mans misunderstanding is another mans gold mine.)

And Vito, whoever you are, Thanks.

 

[jeff of pa]

BACK to your Original Question.

The OBJECT? IS large IRON, and was Off to the Side,

Your Pinpointing was Off, Because The Edge of your Coil Was Actually Getting The Signal, Not the Center of the Coil As is Normal.

IF you Can, Widen the Hole, You Will Find It.

I'v Seen this Happen MANY times to Others, They would Call me over With My Probe & I'd Find the Object 2 to 3 Inches Away from their Hole, & it's Always Rusted Iron.

 

[Born2Dtect]

There is a good write up on Halos' by the technical geek in WET this month. Check it out.

Ed Donovan

 

[Mike Hillis]

I bet Jeff called it right. Iron off to the side. You can usually tell by pinpointing in disc and then pinpointing in pinpoint mode. You'll find what you thought was the target center move. Sometimes by quite a bit.

HH

 

[C-Bob]

Well guys thanks a lot. This is the most replies on a topic I have had seance I have been on this forum.

 

[tallpaul]

well said jeff clean and simple ,,, my words too,, just a hit and miss of to the side,,, my brother has the bounty hunter lone star, and he has trouble pinpointing even when criss crossing, he's always diggen to the side,, he finds it in the end with the probe he he! so C-BOB GO CHECK THEM HOLES you never know what might be waiting,, hope you get a good one HH paul.

 

[bobinsd]

I too have a BH (Lonestar) and experienced the same phenomenon at a beach yesterday...very frustrating. I tried every setting and often got signals in the notch position and nothing popped up. I just assumed that whatever it was it was too deep, but when I tested my platinum ring at the bottom of the hole I could not get a signal unless at 4-5 inches.

Can someone please tell me the optimum settings on a BH for gold or just gold/silver in a beack environment (damp/wet sand)? Can it be programmed using DISC to avoid crap without sacrificing depth? this? The BH manual is devoid of practiacl examples.

Bob
San Diego

 

[jon43]

or maybe the target is big and deeper.



HH? ?Mark

i would say your right on the spot on that. i have had that to happen a lot of times but i dig anyway because you never know whats down there

 

[Thor.500]

I'm brand new to MD. I just bought my first unit. It's a Whites GMT. I'm replying to this post because I live here in Laramie as well, and this subject makes me wonder if it may be possible to get alot of false positive readings in this area simply because of the high content of iron all over the region. I mean to say that there is a reason that the hills all around us here are red. Forgive me if my question seems a bit pedestrian, but being new to this, I need to hear a few things from those who've been doing it for awhile. I do have certain advantages with my own equipment. From what I do understand, it does have a good reputation for being able to discriminate between the iron and non-iron targets, but I just wonder if there may be a significant handicap when hunting in areas where iron content is so high.