[meteorite-list] Sutter's Mill BSE - two more

From: Michael Gilmer <meteoritemike_at_meteoritecentral.com>
Date: Sat, 26 May 2012 09:40:32 -0400
Message-ID: <CAKBPJW9P8VD3gUFu4RvevMdDWxFurRPpubivrv73uNrWS_GhSg_at_mail.gmail.com>

Hi Carl and List,

Wow, I hadn't heard about NWA 7034 yet. But after looking at the
photo, I am keenly interested to hear about it now. It does not
visually resemble any achon-ung I have seen before. What a strange,
strange, stone. :)

Best regards,

MikeG

-- 
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Galactic Stone & Ironworks - MikeG
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On 5/26/12, Carl Agee <agee at unm.edu> wrote:
> Hi Richard,
>
> I haven't seen a thin section of Sutter's Mill yet, but my guess is
> that it will be very dark, just like the meteorite, so maybe not that
> illuminating. I prefer backscatter electron images because they not
> only show texture, but also image chemical compositional variations.
> Like the dark olivines in my images?-  they are Mg2SiO4-rich, the
> light shaded olivines are Fe2SiO4-rich. Bright patches indicate high
> iron or Ti or Cr, and so on.
>
> As to the CaO, the electron microprobe does not do carbon very well so
> it usually comes up with low totals on carbonates. I looked at the
> data today and we found 4 separate crystals with this composition in
> one of the small SM sections -- after perusing the CM literature
> today, I am pretty sure this is calcite or aragonite -- thought by
> some to form during aqueous alteration and commonly found in CMs.
>
> With respect to the classification and type, I will leave that to the
> unequilibrated chondrite experts like Jeff Grossman and Alan Rubin.
>
> MetSoc will be very interesting this year: Tissint, Sutter's Mill, and
> NWA 7034. You haven't heard about NWA 7034? Oh you will...
>
> Carl Agee
>
>
> On Fri, May 25, 2012 at 7:04 PM, Richard Montgomery
> <rickmont at earthlink.net> wrote:
>> Carl and List,
>>
>> I'm struck by the chondrule variation...can't wait to see a TS (hi
>> Anne!)....so it's time to ask about the rabbit hole:
>>
>> As I mentioned I'm just guessing here....not a CM2, due to chondrules
>> actually so present, right? Not a CM3 either (if there ever is such a
>> thing)
>> due to the rim alterations and aqueous stuff; dark matrix like a CM, yet
>> more crowded chondrules; complete CaO crystals; lacking so far of seeing
>> any
>> CAIs....what's your guess at this point??
>>
>> Next Halloween I can dress up as a petrologist scientist....but won't
>> fool
>> anyone.  Fun to speculate, though.
>>
>> Richard M
>>
>>
>> ----- Original Message ----- From: "Carl Agee" <agee at unm.edu>
>> To: "meteoritelist meteoritelist" <meteorite-list at meteoritecentral.com>;
>> "Jeff Grossman" <jngrossman at gmail.com>
>> Sent: Friday, May 25, 2012 2:03 PM
>> Subject: Re: [meteorite-list] Sutter's Mill BSE - two more
>>
>>
>>> Jeff,
>>>
>>> You mean the area in the SW quadrant? It's permeated with the bright
>>> material? It could be sulfide, but I didn't get a chance to EDS or
>>> probe it yesterday. It's all somewhat bewildering, there is so much
>>> look at, so I am starting with the simple stuff that give good
>>> microprobe totals -- haha!. Beware of this meteorite! Like going down
>>> the rabbit hole....
>>>
>>> Carl
>>>
>>>
>>> -----------------------------------------
>>> Carl,
>>>
>>> What's the difference between the two lithologies visible in the first
>>> of these two photos?
>>>
>>> Jeff
>>>
>>> On 5/25/2012 2:19 PM, Carl Agee wrote:
>>>
>>>>
>>>> http://www.facebook.com/photo.php?fbid=4042491099560&set=a.1076549432872.2012978.1200325441&type=1&ref=nf
>>>
>>>
>>>>
>>>> http://www.facebook.com/photo.php?fbid=4042494859654&set=a.1076549432872.2012978.1200325441&type=1&ref=nf
>>>
>>>
>>>>
>>>
>>>
>>> --
>>> 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/
>>> ______________________________________________
>>>
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>>> http://www.meteoritecentral.com/mailing-list-archives.html
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>>>
>>
>
>
>
> --
> 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/
> ______________________________________________
>
> Visit the Archives at
> http://www.meteoritecentral.com/mailing-list-archives.html
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
-- 
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Galactic Stone & Ironworks - MikeG
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Received on Sat 26 May 2012 09:40:32 AM PDT