[meteorite-list] WANTED: small unclassified type 3's

From: Michael Mulgrew <mikestang_at_meteoritecentral.com>
Date: Fri, 7 Jun 2013 10:38:54 -0700
Message-ID: <CAMseTy1YuZO_1zU4to4jcWGLV5ojQJZqyZaQnCY4r0+PEPjRMQ_at_mail.gmail.com>

Howdy, all.

I agree that we can make educated guesses with "high degrees of
certainty", but until it's come from the lab calling something
unclassified by a definitive classification is incorrect, despite how
"apparent" its petrological type appears to be.

Gary, I can't tell you that meteorite is not a type 3, but I also
cannot say definitively that it is. It probably is, but that's as far
as I would go. :)

Michael in so. Cal.


On Fri, Jun 7, 2013 at 9:02 AM, Gary Fujihara <fujmon at mac.com> wrote:
> Aloha Jeff, Rob, Michael, and Scott,
> cc; metlist
>
> I can agree with both sides of the argument, that the only way to be absolutely sure an ordinary chondrite is a type 3 is to have it analyzed.
>
> However, many type 3 ordinary chondrite meteorites feature external characteristics that allow them to be recognized without analysis, or even being cut open, with a high degree of certainty.
>
> Perhaps Scott (William) would be better suited to state 'possible type 3' in his inquiry.
>
> Anybody want to tell me this uncut stone is not a type 3? ;^)
> https://www.facebook.com/media/set/?set=a.2138564189044.2133400.1394318075&type=1
>
> gary
>
> On Jun 6, 2013, at 10:23 PM, Jeff Kuyken <info at meteorites.com.au> wrote:
>
>> Totally agreed Rob. As someone who collects primitive chondrites, I can say
>> that there are heaps of examples you might think are Type-3 but turn out to
>> be 4's. You absolutely need a thin section to tell with 100% certainty.
>>
>> Cheers,
>>
>> Jeff
>>
>>
>> -----Original Message-----
>> From: meteorite-list-bounces at meteoritecentral.com
>> [mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Rob Matson
>> Sent: Friday, 7 June 2013 4:19 PM
>> To: 'William Feek'; meteorite-list at meteoritecentral.com
>> Subject: Re: [meteorite-list] WANTED: small unclassified type 3's
>>
>> Hi William,
>>
>>> Michael, No need to get all anal about the verbage, this ain't a Supreme
>> Court
>> hearing.
>>> I guess I could have inserted the word "possible", maybe even used the
>> word
>> "potential",
>>> but thankfully there's reasonable people who've displayed the capability
>> of
>> understanding
>>> what I was getting at without the use of crystal clear lawyer speak such
>> as
>> what's written
>>> in a software User Agreement. Go ahead and critique every line and word
>> that I
>> wrote,
>>> I'll be the first to agree that it's probably wrought with problems, but
>> I'm
>> not going to
>>> rewrite it, nor am I going to take draft's of future documents to the
>> english
>> department
>>> of the nearest college for correction before posting.
>>
>> You're being overly reactionary in your reply to Michael. He raised a
>> perfectly
>> valid
>> point: there is absolutely no way you can determine with confidence that an
>> uncut
>> meteorite (especially from NWA) is unequilibrated (type-3).
>>
>>> By the way, I can tell the difference between a Murchison and NWA 2086,
>> and
>> would
>>> you beleive I can do so without the use of analysis.
>>
>> That is a completely different matter.
>>
>>> Similarly, there just so happens to be the existence of some stones which
>> can
>> be
>>> determined to be type 3 without the use of analysis ...
>>
>> No -- not "similarly." William, you need to be disabused of this notion,
>> unless
>> your
>> "some stones" is extremely restrictive.
>>
>>> ... so you mean to tell me that you'd have trouble being able to tell if a
>> stone
>>> such as Begga was a type 3 or not without the use of analysis?
>>
>> YES, ABSOLUTELY, if that stone is uncut. No meteoriticist would ever claim
>> an
>> uncut stone was unequilibrated without seeing a thin section.
>>
>> Cheers,
>> Rob
>>
>>
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>>
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>
> Gary Fujihara
> Big Kahuna Meteorites Inc.
> PO Box 4175, Hilo, HI 96720
> (808) 640-9161
> http://bigkahuna-meteorites.com/
> http://www.ebay.com/sch/fujmon/m.html
>
Received on Fri 07 Jun 2013 01:38:54 PM PDT