mystery metal

[bruizr]

i have found metal in several different places miles apart that looks like rusted iron and sticks to my magnet that i use to shuffle around in the dug dirt and inside the hole to remove hard to find junk metal( if you do this you will be enlightened as to ho much junk metal debris there is that can play havoc with your detector in the way of false signals). i don't have pictures yet but some of it is flat and irregular shaped and some are thick or chunky.
the mystery is that none of it is detected by my ace 250, even in all metal and pinpoint mode or by my whites bullseye pinpointer. my imagination tells me it's something from another world like a crashed ufo or space scrap. maybe some unknown element they will name after me and i will be paid huge fees for speaking tours on how to find this mystery metal. any scientific idea's or metallurgic pro's out there who care to pop my delusional dream?

 

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[Charlie P. (NY)]

What do you have your discrimination level set at?

 

[bruizr]

discrimination 2 nothces below max.

 

[Charlie P. (NY)]

Um. Iron is just above seawater and ground minerals. I don't know a 250, but "2 below max" on a 0 to 10 scale on my Minelab would select out lead, nickel, steel, brass, aluminum, zinc and gold. Tune it down to two above minimum and re-try.

 

[bruizr]

i had it wrong. the discrimination i keep turned down. it's the sensitivity i had turned up, sorry! that shouldn't affect it in pinpoint mode though and my bullseye pinpointer doesn't sense it either.

 

[Charlie P. (NY)]

Got any old kilns or slag furnaces nearby? The slag from refining has ash and coke and metal all slurried together. Could be spread out over such a wide area that the pinpointer doesn't find it in the 1-1/2" or so range it has, but the larger detector does because it "sees" a lmost a foot worth of depth at a time.

If it's metal enough to stick to a magnet I can't imagine how this could be, though. Hmmmm.

I've seen enough 50's B grade sci-fi flicks to know you never put it on the mantle, under an electric blanket or next to a kitten, though.

 

[Monty]

A few years back it was fashionable for the city to take all the slag from the local smelter and use it for roadbeds, park end fill and just about anything else that needed some fill dirt. Because of that I run into it all the time and it raises cain with my detectors. There is such a wide range of different metals that you can't really discriminate it out so I usually just move on to a diferent site. My ACE 250 likes to run at about 4 bars sensitivity under most conditions. I back it off to about two bars around playground equipment and fences, etc. Check for overhead electrical wires as they often cause falsing with my ACE. All things being equal, it is better to have not enough sensitivity than too much. Work with it and you will find the ideal setting for your ACE. Monty

 

[bruizr]

hey monty, thanks for the input. does the slag you've come across act like what i described as far as sticking to a magnet but not registering on a metal detector?

 

[Monty]

A lot of the slag has rust on it so I know it would stick to a magnet. I have taken a few pieces of mystery metal home and the magnet won't stick to it. But the detector will pick up all of it unless I have iron discriminated out. I've never had a magnet with me in the field to see if it was all attracted to a magnet. Since I know much of it is from copper or brass or some mystery metal I am pretty sure a lot of it isn't magnetic. Am I repeating myself? Anyway, "that's the name of that tune!", Barretta sez. monty