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  1. #1
    us
    Jul 2009
    Phoenix, Arizona
    Whites TDI
    280
    20 times

    Mystery Rock

    I realize I may not get a perfect answer on this one, short of getting this analysed, but it is quite odd, so I thought I would post it. This rock, (the two pieces fit together) which I found up in the Bradshaw Mountains near Mill Creek, makes the metal detector go absolutely bananas. It is also attractred to a magnet. The rock itself is not magnetic. It seems to be quite heavy as compared to other rocks its size. If it were iron, it would be rusty. I hope it's not radioactive!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    We must question the story logic of having an all-knowing, all-powerful god, who creates faulty humans and then blames them for his own mistakes.  Gene Roddenberry

  2. #2
    us
    Feb 2009
    NC
    Whites XLT
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    45 times
    All Types Of Treasure Hunting

    Re: Mystery Rock

    Cool rock Is the orange rust or dirt? Maybe natural ore specimen?

  3. #3
    us
    monty

    Jan 2005
    Sand Springs, OK
    ACE 250, Garrett
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    Re: Mystery Rock

    Appears to be sedimentary with all the layers. Probably has something metalic sandwiched in there. I'd love to take a lapidary saw and cut it in two just to see! Monty
    Don't make me loose the hounds! If you dig, Cover up your holes.

  4. #4
    us
    Feb 2009
    NC
    Whites XLT
    3,142
    45 times
    All Types Of Treasure Hunting

    Re: Mystery Rock

    Quote Originally Posted by Monty
    Appears to be sedimentary with all the layers. Probably has something metalic sandwiched in there. I'd love to take a lapidary saw and cut it in two just to see! Monty
    Sorry can't do. It looks like a pet rock already

  5. #5
    us
    Jul 2009
    Phoenix, Arizona
    Whites TDI
    280
    20 times

    Re: Mystery Rock

    The "orange" you see, in appearence, is more like a dull yellow-brown color, I guess there was a little to much light in the photo. The mineral information site (http://www.mii.org/Minerals/photonickl.html) says "Nickel, iron and cobalt are the only three elements known to be ferro-magnetic. Of the three, nickel is the least magnetic." This must be some type of alloy, but I see no rust, so it is not iron, iron would rust.

    Regarding the metal detector, (Ace 250) what it does is jumps up and down the scale, unable to identify it as one specific metal, sounding off on all different types, it is quite chaotic!

    Here are some additional photos taken in natural light, I think the color appears correctly.

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    We must question the story logic of having an all-knowing, all-powerful god, who creates faulty humans and then blames them for his own mistakes.  Gene Roddenberry

  6. #6
    Ant
    Ant is offline
    us
    Aug 2006
    Cali
    Glold Bug 2 MineLab SE
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    Banner Finds (1)

    Re: Mystery Rock


    I say you have a common sandstone, but it could be a type of fieldspar.

    HH

  7. #7
    us
    May 2009
    central, Illinois
    white's spectrum VX3
    2,211
    4 times

    Re: Mystery Rock

    sedimentary shale
    TRADER OF TREASURES

  8. #8

    Re: Mystery Rock

    Quote Originally Posted by traderoftreasures
    sedimentary shale
    Yep....

    surprised there's no fossils

    SS
    Don't piss down my back, then tell me it's raining.

  9. #9
    us
    Jul 2009
    new jersey
    minelab, white's xlt, deus xp, fisher aquanaut, white's twin box
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    Re: Mystery Rock

    Just guessing here, but I know that metal detectors respond to the carbon rods from old batteries. Is it possible that the same type of carbon might exist in sedimentary rocks. I found a site which seems to suggest something maybe this occurrence on rare occasions. I don't have a clue what it all means (if anything!) http://www.springerlink.com/content/l56t8r80h7774035/
    johnnyi

  10. #10
    us
    Mar 2009
    Noth Central Texas
    White's 6000 Pro XL, G2, Compass Coin Scanner Pro, Garrett BFO Discriminator, Garrett Pro Pointer,White's TRX PP, XP Gold Maxx Power, White's IDX Pro, Omega, Tesoro Vaquero
    60

    Re: Mystery Rock

    Krptonite!!

  11. #11
    us
    May 2009
    central, Illinois
    white's spectrum VX3
    2,211
    4 times

    Re: Mystery Rock

    i do see a carbon layer or two
    TRADER OF TREASURES

  12. #12
    us
    Nov 2008
    Toll Free ~ 855~966~3563
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    Re: Mystery Rock


  13. #13
    us
    Jul 2009
    Phoenix, Arizona
    Whites TDI
    280
    20 times

    Re: Mystery Rock

    Obviously sedimentary, no question about that at all.

    Shale:
    Mineralogically, most shales are made up of clay minerals, silt-sized quartz and feldspar grains, carbonate cements, accessory minerals such as pyrite and apatite, and amorphous material such as volcanic glass, iron and aluminum oxides, silica, and organic matter. The most common clay minerals in shales are smectite, illite, kaolinite, and chlorite. The type of clay particles deposited is dependent on the mineralogy, climate, and tectonics of the source area. See also Clay minerals; Chlorite; Illite; Kaolinite.

    Problem with the carbon theory is, it's strongly attracted to a magnet. Carbon is not.

    Ferro-magnetic metals are nickel, iron and cobalt exclusively (at least for strong attraction) as I understand it. I don't think iron, or it would be very rusty.
    We must question the story logic of having an all-knowing, all-powerful god, who creates faulty humans and then blames them for his own mistakes.  Gene Roddenberry

  14. #14
    us
    Jul 2009
    new jersey
    minelab, white's xlt, deus xp, fisher aquanaut, white's twin box
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    Relic Hunting
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    Re: Mystery Rock

    Skywola, I forgot it clings to a magnet. Is it possible then that a layer could also possibly be magnetic? (does it affect a compass needle/) Magnetite does exist in sedimentary rock. http://en.wikipedia.org/wiki/Magnetite
    johnnyi

  15. #15
    us
    Jul 2009
    Phoenix, Arizona
    Whites TDI
    280
    20 times

    Re: Mystery Rock

    I tested to see if it was magnetic, it is not, I have a magnet and I have a guitar slide that my magnet will pick up, but the rock demonstrates no attraction whatsoever. However, the rock does influence a compass!

    Bluing (steel) is a process in which steel is partially protected against rust by a layer of magnetite. I think we may have it . . . . the photo on the link you provided looks similar to the rock. An ASU geology professor might be intersted in this rock . . . sound like they can get a lot of info based on the magnet field.

    We must question the story logic of having an all-knowing, all-powerful god, who creates faulty humans and then blames them for his own mistakes.  Gene Roddenberry

 

 
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