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Title: mineralization Post by: grego on October 18, 2012, 04:11:50 PM Hi all, In lay terms could anybody please explain to me mineralization, What does it do or not do to detectors,
Do newer model detectors sort it out automaticly Thank you Grego Title: Re: mineralization Post by: nobby on October 18, 2012, 04:37:49 PM imagine it as fog.....if you go out on a foggy night in the car and shine your main beam headlights it just makes visibility worse......if your turn the lights down low makes it clearer
Title: Re: mineralization Post by: Mike on October 18, 2012, 04:40:12 PM imagine it as fog.....if you go out on a foggy night in the car and shine your main beam headlights it just makes visibility worse......if your turn the lights down low makes it clearer and what ever you do dont go onto the moor :o :o :o Title: Re: mineralization Post by: Chef Geoff on October 18, 2012, 05:16:21 PM Well done Nobby that made it as clear as um, well, fog :D
mineralisation is as it says minerals or tiny particles that are of a metallic origin whether from natural ores or rust particles. These particles exist in lesser or greater degrees in all soils and have an accumulative effect on a metal detector, meaning that the deeper the signal travels then the greater the mineralisation and with some coils this effect would follow the inverse square law and if you double the distance you would in fact multiply the effect by a factor of 4. While at low levels these "Metals" are below the sensitivity of most machines, as their density increases, so the machine starts to see the effect as an actual target, thus small targets with a low conductivity that stand out "unique" on the surface, once buried begin to merge with their background, untill eventually the signal from the target and that of the surrounding ground is the same. Ground balancing a machine basically calibrates "zero" on the machine but of course small burried targets can also be "zeroed" out :'( While the more expensive machines can be fine tuned to mineralisation and can be run "on the edge", all VLF motion machines suffer from it regardless of price PI machines on the other hand work in a different way and are not effected by naturally occurring mineralisation which is why they can find small targets and a far greater depth. Title: Re: mineralization Post by: rjm on October 18, 2012, 05:36:35 PM This is why a lot of VLF machines have difficulty detecting on the wet and black sand on a beach. It's the salts and minerals playing havoc with the 'ground balance' of the machine. So when driving in fog...............use your Fog Lights! ;D Title: Re: mineralization Post by: Val Beechey on October 18, 2012, 08:21:32 PM One of my old fields is so bad the pin pointer sounds off on the soil. Try getting round that then.
Val |