Hot rocks and magnetic viscosity objects

[Great_Alex]

Dear friends

I have a problem when I'm searching for treasures in ancient places, the hoards in ancient castles and defense walls (almost these treasures have more than 3 meters deep).
Hot rocks and magnetic viscosity object confuse me .some kind of ancient bricks and shard have strong magnetic viscosity and make a strong signals on Electromagnetic detectors .I want to find how can identify between these Magnetic Viscosity Objects and real targets or eliminate them.
Over 90% of treasures buried in chambers that built with this high magnetic viscosity bricks.
In the ancient walls and walls of castle that build with bricks the EM detectors respond to all of the wall and the detectors are very confused :

• VLF detectors with good discrimination can't penetrate too much but when depth of target was less than 1 meter and the target was big , the detector response on target and identify it.
• GPRs detects hot rocks and these magnetic viscosity object very good and hardly can identify between metals and that objects.
• ER devices have good response these Magnetic viscosity objects have a high resistance and metals have low resistance so identify them is very easy but another problem remains : over 90% of treasures placed and fully surrounded with bricks and concrete that have magnetic viscosity so the ER device show a high resistance on this surrounded treasure.!
• PI detectors goes deep but they are very sensitive on these Magnetic viscosity object. Pulse induction detectors finds these magnetic viscosity object like a big metal!
• Soil moisture makes a bad effect and improves the magnetic viscosity effects.
• In hot days when the temperature is high the effect of these magnetic viscosity objects increases .

Maybe there was a very simple way to eliminate that HOT BRICKS but I'm really confused and I don't know how can get ride of that magnetic viscosity!

Best regards
Alex

[Great_Alex]

Hey Professors

you are very lucky
I guess it's not happend for you at all and sure you don't ever go to real field for treasure hunting and only chat with your computer and imagine about TH and virtual treasure recovery

i forgot to write about LRL respond :

- all the LRLs that i use (Lectra,anderson rods, electroscopes ,...) detect this hotrocks like gold . (I didn't test FG80 but i test it soon)

[Reg]

Hi Alex,

There aren't any castles or ancient defense walls where I live so I don't do much hunting around them. However, I do encounter similar type signals out in the field when nugget hunting. So, I am somewhat familiar with what you are experiencing.

Now, as for your problem with fired bricks and walls, about the only way to minimize such signals when using a PI is to develop some form of ground balance that will allow you to cancel such signals or buy a PI with this feature built in.

Actually, you will be able to cancel only those that have the exact response as what you are canceling. This can include some of the bricks bricks, fired walls and certain rocks. Unfortunately some other bricks change as can fired walls, and as such will have a little different chemical makeup. These will still give a very weak signal. However, a small adjustment in the ground balance adjust what is being canceled and this will usually let you know what those are. So, by adjusting the ground balance a little, you can cancel most of such signals. When canceling the most extreme rocks, bricks, etc, others will now give a weak negative response. This will help you recognize them.

So, if you are using a pulse induction type detector, then you need to buy or develop a form of ground balance and know how to make minor adjustments to it to indicate and minimize the problems you are encountering.

Unfortunately, if what you are looking for has the exact signal, then it will be canceled also. Fortunately this is a very rare situation.

Reg

[Max]

Hey Professors

you are very lucky
I guess it's not happend for you at all and sure you don't ever go to real field for treasure hunting and only chat with your computer and imagine about TH and virtual treasure recovery

i forgot to write about LRL respond :

- all the LRLs that i use (Lectra,anderson rods, electroscopes ,...) detect this hotrocks like gold . (I didn't test FG80 but i test it soon)

Hi Alex,
I totally agree with Reg on side effects due to ceramics, pottery, briks etc...and so with you. I have direct experience of how great signals could be from these using a PI machine. I can say now, after making a good balanced PI (GS4) and tested/tuning it for a while in different scenarios (real fields), that's not a good idea having a PI machine in those sites. You'll experience many strange things...and very often false signals from every kind of hot-rocks, fired walls fragments, bricks etc etc etc and you'll not be able to cancel out that signals using GEB in also the best PI machine you could build or buy...
I never seen any chamber as you mentioned...but can imagine how furstrating could be digging meters holes to find just bricks...and other no-value ceramics.
My suggest is to avoid all kind of PI detectors if your search is in that kind of scenario or you'll waste your time.
Also VLF can't be useful to search at that depths...
I don't trust LRL and electrostatic devices...(lectra etc)...so I can't suggest using one, but maybe I'm wrong on it, don't know.
ER meters are good...but you discovered the weak point...full enclosive chambers ! GPR too have weakness...in that fields.
The only thing I would suggest is magnetometers...but keep in mind that they find magnetic anomalies...so much IRON...but if there is an iron box or iron nails...etc...around valuable things it would be OK for your purposes.
Searching on ancient field for iron could be a good idea...cause yes you could find nails and walls bars etc but also some cache... if lucky.
I cannot see any good solution to your problem...cause I think you are in a worse case scenario.

Best regards,
Max

[Morris_jo]

Best Regards

[Great_Alex]

Still confused

Dear friends

Unfortunately these magnetically viscous objects are very diffuse and the targets are deep. for shallow targets good motion PI like GP family of Minlab are very useful but for deep targets like my tragedy .

Ground balancing is necessary and I didn't find a PI detector that has good ground balance , I use some detectors with ground balance (I didn't use GS4, Max) but ground balancing of the PIs is not good if you have a good suggestion about PI kind with good ground balance please guide me about that.

Magnetometers are not useful for this scenario cause this ancient places are full of magnetic objects and magnetometers detects this unwanted targets .
Magnetometers are very good for archaeology and finding relics but it doesn't good for me (finding gold between magnetically viscous objects)

I guess for canceling this unwanted should use of another devices like gravimeter or EM conductivity meters or a device for detect density of buried objects!!??

Best regards

Alex