[meteorite-list] KATOL (L6) is official

From: Jason Utas <meteoritekid_at_meteoritecentral.com>
Date: Tue, 31 Dec 2013 14:39:38 -0800
Message-ID: <CABEOBjLrHNrqB1n-SLoFrOaTJOcXx=Km6EGqoXHf83iTCkcbeQ_at_mail.gmail.com>

The lab data you (Carl) mention suggests only L, nothing more. No
one's arguing with that. We had that data months ago.

As I understand it, not one chondrule was observed optically in Katol;
they were found only when examining BSE images. This would have ruled
out a chondritic classification prior to the widespread use of SEM's.
And the fact that we're discussing this now is relevant; no other
"type 6" chondrite has been metamorphosed to this extent (literally
invisible chondrules, unless you have a multi-million dollar piece of
equipment at your disposal).

Since this meteorite doesn't texturally resemble any known L's, having
been melted and slowly cooled to a poikilitic texture, deeming it an
L6 is pigeonholing it. Larger-scale heterogeneities resulted in 140
gram iron meteorites and 200+ gram literally metallic-iron-free
meteorites with glossy Ca-rich fusion crusts. Such things aren't
usually glossed over when classifying a meteorite.

It's just like calling Al Haggounia 001 an aubrite, EL6/7, or EL3.
Just because you can justify a classification with a few parameters
doesn't make it an accurate descriptor of a meteorite. Which of those
classifications is best? EL3. Is it right? No. That stone doesn't
texturally resemble any other (enstatite) chondrites of any kind.
It's anomalous.

Rather like Katol.

Jason

www.fallsandfinds.com


On Tue, Dec 31, 2013 at 11:03 AM, Carl Agee <agee at unm.edu> wrote:
> Hi Mike,
>
> No doubt an interesting meteorite! I guess I should qualify it by
> saying the oxygen and the olivine and pyroxene geochem data are garden
> variety EOC. I guess looks can be deceiving -- yet another testimony
> to lab data being the "blind taste test".
>
> Carl
> *************************************
> Carl B. Agee
> Director and Curator, Institute of Meteoritics
> Professor, Earth and Planetary Sciences
> MSC03 2050
> University of New Mexico
> Albuquerque NM 87131-1126
>
> Tel: (505) 750-7172
> Fax: (505) 277-3577
> Email: agee at unm.edu
> http://meteorite.unm.edu/people/carl_agee/
>
>
>
> On Tue, Dec 31, 2013 at 10:23 AM, Michael Farmer <mike at meteoriteguy.com> wrote:
>> Carl, the huge metal nodules, the large green crystals throughout the matrix, very odd meteorites, everyone who looked at it thought it was an achondrite, including many scientists.....
>> I've never seen an L6 with white matrix and some pieces nearly green with crystals.
>> Not your garden variety L6 for sure.
>> Michael Farmer
>>
>> Sent from my iPad
>>
>> On Dec 31, 2013, at 10:14 AM, Carl Agee <agee at unm.edu> wrote:
>>
>>> Super write-up by Laurence Garvie, but strange that there was so much
>>> mystery surrounding what turns out to be garden variety "L6", albeit a
>>> nice fresh fall. I wonder why people thought it was "achondrite-ung"?
>>> Oxygen and geochem are unequivocal EOC, no mystery at all.
>>>
>>> Carl Agee
>>> *************************************
>>> Carl B. Agee
>>> Director and Curator, Institute of Meteoritics
>>> Professor, Earth and Planetary Sciences
>>> MSC03 2050
>>> University of New Mexico
>>> Albuquerque NM 87131-1126
>>>
>>> Tel: (505) 750-7172
>>> Fax: (505) 277-3577
>>> Email: agee at unm.edu
>>> http://meteorite.unm.edu/people/carl_agee/
>>>
>>>
>>>
>>> On Tue, Dec 31, 2013 at 9:06 AM, Jim Wooddell
>>> <jim.wooddell at suddenlink.net> wrote:
>>>> Nice GeoChem data. Interesting to see the XFR data included.
>>>>
>>>>
>>>> Happy New Year!
>>>>
>>>> Jim Wooddell
>>>>
>>>>
>>>>
>>>>
>>>> On 12/31/2013 8:14 AM, karmaka wrote:
>>>>>
>>>>> Dear list members,
>>>>> Katol is officially listed as an L6 in the Bulletin now!
>>>>>
>>>>>
>>>>> http://www.lpi.usra.edu/meteor/metbull.php?sea=Katol&sfor=names&ants=&falls=&valids=&stype=contains&lrec=50&map=ge&browse=&country=All&srt=name&categ=All&mblist=All&rect=&phot=&snew=0&pnt=Normal%20table&code=58500
>>>>> Happy new year 2014 to all of you!
>>>>> Martin
>>>>> ______________________________________________
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>>>>
>>>>
>>>> --
>>>> Jim Wooddell
>>>> jim.wooddell at suddenlink.net
>>>> http://pages.suddenlink.net/chondrule/
>>>>
>>>>
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Received on Tue 31 Dec 2013 05:39:38 PM PST