[meteorite-list] CR Chondrites

From: Michael Farmer <meteoritehunter_at_meteoritecentral.com>
Date: Wed Nov 24 22:42:14 2004
Message-ID: <047d01c4d2a0$bce91a10$0200a8c0_at_S0031628003>

Tom, that is a common trait of CR meteorites, want to see, check these
babies out. http://www.meteoriteguy.com/NWA801.htm
As you can see in many of the pieces, the actual chondrules are metal rich,
so this must have formed in a very interesting way. Imagine how the cloud
must have looked with all that metal and silicates condensing.
The CR meteorites are among the most beautiful meteorites out there.
Mike Farmer
----- Original Message -----
From: "Tom AKA James Knudson" <peregrineflier_at_npgcable.com>
To: <Meteorite-list_at_meteoritecentral.com>; <bernd.pauli@paulinet.de>
Sent: Wednesday, November 24, 2004 7:54 PM
Subject: Re: [meteorite-list] CR Chondrites


> Hello Bernd and list. I am just curious about CR's because I read
> something
> about them having metal inside the chondrules. I was wondering if CR's
> were
> the only meteorite with this feature. I am not implying my meteorite is a
> CR, but I had thought it was weird because the white inclusions were full
> of
> metal. Is this common for inclusions? Would the metal get inside an
> inclusion the same way it would a chondrule? (see link if you don't
> remember
> the meteorite)
>
>
> http://www.geocities.com/alosthawker/MVC-032S.JPG
>
> Thanks, Tom
> peregrineflier <><
> IMCA 6168
> http://www.frontiernet.net/~peregrineflier/Peregrineflier.htm
> ----- Original Message -----
> From: <bernd.pauli_at_paulinet.de>
> To: <Meteorite-list_at_meteoritecentral.com>
> Sent: Wednesday, November 24, 2004 12:19 PM
> Subject: [meteorite-list] CR Chondrites
>
>
>> Hello Tom and List,
>>
>> I've told you at least once before and I am telling you once again:
>> Please, stop imparting a feeling of inferiority to yourself and don't
>> keep telling the world that you are what you call "stupid". Just think
>> of your falcons - they are proud, majestic creatures even though they
>> don't know anything about meteorites. Ignorance is one thing, stupidity
>> another and it has many different facets as we all know so well ;-)
>>
>> As for CR meteorites, here is a slightly shortened version from NORTON
> O.R.
>> (1998) Rocks From Space II, p. 195: "CR chondrites ... contain about 10 %
> by
>> weight iron-nickel metal and iron sulfide. The metal content is the most
> easily
>> distinguished characteristic. The metal is found in the fine-grained
> matrix and
>> as inclusions in the chondrules. Roughly 50 percent of the meteorite is
> relatively
>> large chondrules (0.027-inch average diameter) and chondrule fragments."
>>
>> O.R. Norton's descriptive explanation is not *too* technical and good
> enough
>> as a first approach. I would only add that more often than not CR
> chondrules
>> are surrounded by a metallic rim, in other words they are armored. One
> might
>> also add that, although they do not look "carbonaceous" at first sight,
> they
>> are considered members of this group because their compositions are
> similar
>> to those of the carbonaceous chondrites.
>>
>> Best wishes,
>>
>> Bernd (still in love with his gorgeous, cut 7.23-gram CR2
>> crusted endpiece purchased from Dean in May of 2003)
>>
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>
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Received on Wed 24 Nov 2004 10:42:03 PM PST