[meteorite-list] sharp protrusion from an iron meteorite

From: jason utas <jasonutas_at_meteoritecentral.com>
Date: Thu, 28 Feb 2013 22:24:40 -0800
Message-ID: <CAK837U2z9rXh1JXW5MKoeuK_cSFS09rx8MkS_GhKUGUi_7U4pg_at_mail.gmail.com>

Hello Mike, All,
Good catch. Uruacu's something else, while Baygorria is Campo, along
with Las Palmas and a few other newbies supposedly from...other
places.
Gotta love globalization...
Jason

On Thu, Feb 28, 2013 at 10:05 PM, Michael Farmer <mike at meteoriteguy.com> wrote:
> Uruacu could hardly be more different than Campo. Jason, are you confusing Baygorria with Uruacu? I saw Adam mention Baygorria (which is a total scam to claim campo under another name).
> Uruacu from Brazil is an extremely stable iron. It is old, but amazingly when cut is perfect and so have yet to see a piece that rusts on a cut surface.
> Michael Farmer
>
> Sent from my iPhone
>
> On Feb 28, 2013, at 11:31 PM, jason utas <jasonutas at gmail.com> wrote:
>
>> Hello Adam, All,
>>
>> Actually, Uruacu does appear to be distinct from Campo del Cielo.
>> Uruacu appears to be a much older meteorite that has weathered in
>> different conditions, and many individuals show cohenite when cut -- a
>> mineral I have never seen in Campo del Cielo. Generally speaking,
>> Campos run the full range from freshly-fusion crusted to rusty lumps,
>> and everything in-between. But, Campo fell within the past ~5,000
>> years, so we're talking about rapid weathering in a wet environment
>> (also why it's a ruster). Uruacu fell in a drier area, and most
>> individuals exhibit a much more uniform covering of shale that does
>> not readily flake off due to rusting. They seem to have fallen much
>> longer ago, and are generally more weathered due to the fact that
>> they've been around for longer. Uruacu generally resists rusting
>> better.
>>
>> It would be like comparing Sikhote Alin to Henbury. No Henburies I
>> know of rust, but, by and large, they're not as fresh as most
>> Sikhotes. But some Sikhotes appear to have fallen into swampy areas
>> and look pretty bad -- and rust. It's hard to mix the two up.
>>
>> The trouble is that I've also seen Campos sold as Uruacu, which
>> complicates things. Uruacu is a very old fall. Even some reputable
>> dealers have been selling specimens of "new Campo" (crust,
>> regmaglypts) as Uruacu. Very different. I assume this is due to
>> dishonest suppliers.
>>
>> There's a stunning, fairly large Uruacu for sale at the moment. Not
>> mine, but I wonder if this will bring it out of the woodwork.
>>
>> Regards,
>> Jason
>>
>>> From: Adam Hupe <raremeteorites at yahoo.com>
>>> Date: Wed, Feb 27, 2013 at 2:59 PM
>>> Subject: Re: [meteorite-list] sharp protrusion from an iron meteorite
>>> To: Adam <meteorite-list at meteoritecentral.com>
>>>
>>>
>>>
>>> Isn't Baygorria another meteorite with a fake provenance? Basically a
>>> cleaned up Campo with a delaminated section protruding after a
>>> not-so-careful makeover. I would just tell him to seek first aid so he
>>> doesn't catch the dreaded Lawrencite disease.
>>>
>>> Adam
>>>
>>>
>>>
>>>
>>> ----- Original Message -----
>>> From: Randy Korotev <korotev at wustl.edu>
>>> To: meteorite-list at meteoritecentral.com
>>> Cc:
>>> Sent: Wednesday, February 27, 2013 2:41 PM
>>> Subject: [meteorite-list] sharp protrusion from an iron meteorite
>>>
>>> I recieved a well prepared letter from a fellow with a question that I can't
>>> begin to answer. Maybe someone on the list has seen this kind of thing
>>> before.
>>>
>>> He bought a Baygorria (Iron, IAB complex) from a dealer 3 years ago. He
>>> picked it up recently to find a metal protrusion sticking out of the thing
>>> that was sharp enough to prick his thumb.
>>>
>>> Here's a jpg of his scanned photo.
>>>
>>> http://meteorites.wustl.edu/baygorria.jpg
>>>
>>> What's happened here?
>>>
>>> Randy Korotev
>>> St. Louis
>>>
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Received on Fri 01 Mar 2013 01:24:40 AM PST