[meteorite-list] My first classification - NWA 6696 (LL3.6)

From: Greg Catterton <star_wars_collector_at_meteoritecentral.com>
Date: Fri, 29 Apr 2011 12:06:19 -0700 (PDT)
Message-ID: <620096.66667.qm_at_web46408.mail.sp1.yahoo.com>

Way to go Mike, congrats!
I am happy to say this piece:
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/chondrules/slice-close-chondrules-rough.jpg
Is sitting in my display case now with a NWA number, very cool!


Greg Catterton
www.wanderingstarmeteorites.com
IMCA member 4682
On Ebay: http://stores.shop.ebay.com/wanderingstarmeteorites
On Facebook: http://www.facebook.com/WanderingStarMeteorites


--- On Fri, 4/29/11, Galactic Stone & Ironworks <meteoritemike at gmail.com> wrote:

> From: Galactic Stone & Ironworks <meteoritemike at gmail.com>
> Subject: Re: [meteorite-list] My first classification - NWA 6696 (LL3.6)
> To: "Larry Atkins" <thetoprok at aol.com>
> Cc: meteorite-list at meteoritecentral.com
> Date: Friday, April 29, 2011, 2:28 PM
> Hi Larry, Gary and List,
>
> Here are some photos of NWA 6696 -
>
> http://s268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/chondrules/
>
> I have a few more on my HD somewhere, but there isn't much
> to see on
> such a small stone.? My only regret is that the stone
> is so small.
> The matrix is wall-to-wall chondrules, many of which are
> surrounded by
> a thin rim of metal.? This stone just goes to show (as
> Larry said)
> that visual pairings are misleading.? I'd seen photos
> of CR stones
> that looked exactly like my specimen.? The main reason
> I submitted it
> is because I was confident it was a CR.? Then I was
> pleasantly
> surprised by the LL3.6 classification, given the presence
> of
> visually-abundant metal.? A large stone like this
> would produce some
> very attractive slices.
>
> Of course, like many chondrule-rich OC's, the look is not
> improved by
> polishing.? The chondrules darken and become invisible
> when polished
> (except for a few of the whitish colored ones).? So I
> left one side of
> my remaining slice unpolished.
>
> By virtue of numbers, this LL3.6 is more scarce than a
> CR.? There are
> 115 approved CR meteorites and only 16 LL3.6 stones.?
> It's good to
> know that my stone is in good company with Parnallee and is
> sitting in
> a UCLA cabinet where it might contribute to science in some
> way.? :)
>
> Best regards,
>
> MikeG
>
> ---------------------------------------------------------------------------
> Galactic Stone & Ironworks - Meteorites & Amber
>
> Website - http://www.galactic-stone.com
> Facebook - http://www.facebook.com/galacticstone
> News Feed - http://www.galactic-stone.com/rss/126516
> Twitter - http://twitter.com/galacticstone
> EOM - http://www.encyclopedia-of-meteorites.com/collection.aspx?id=1564
> ----------------------------------------------------------------------------
>
>
> On 4/29/11, Larry Atkins <thetoprok at aol.com>
> wrote:
> > Hi Mike, List,
> >
> > Congrat's on your classification!
> >
> > The way you described the meteorite as having armored
> chondrules and
> > thinking it was possibly a CR, then finding out it's
> an LL 3.6 made me
> > think of a very similar scenario that has recently
> played out for me. I
> > thought a chondrite I bought in 2008 was possibly a CR
> as did some
> > other list members and it turned out to be an LL 3.8.
> I'd like to see
> > pictures of yours Mike, I wonder if it looks similar.
> Here's a link to
> > pic's of my new classifications, NWA 6581, ( LL 6) and
> NWA 6582, the LL
> > 3.8.
> >
> > http://s934.photobucket.com/albums/ad190/alienrockfarm/
> >
> >
> > I saw that yours is 1 of only 16 meteorites with that
> classification,
> > so despite its "unassuming" status amongst a pile of
> lunars and such,
> > it's still a rarity!
> >
> >
> > Sincerely,
> > Larry Atkins
> >
> > IMCA # 1941
> > Ebay alienrockfarm
> >
> >
> >
> > -----Original Message-----
> > From: Galactic Stone & Ironworks <meteoritemike at gmail.com>
> > To: Meteorite List <meteorite-list at meteoritecentral.com>
> > Sent: Fri, Apr 29, 2011 11:41 am
> > Subject: [meteorite-list] My first classification -
> NWA 6696 (LL3.6)
> >
> >
> > Hi List,
> >
> > Some new meteorites were added to the Met Bulletin
> today, including
> > some new lunars.
> >
> > Hidden amongst the more exciting lunars is an
> unassuming LL3.6 - NWA
> > 6696.
> >
> > This small 10g stone came in a batch of unclassified
> NWA that I
> > purchased about 3 years ago.? Upon windowing this
> small stone, I saw
> > an adundance of armored chondrules.? At first
> glance, it resembled a
> > CR type.???I posted some photos to this
> list, a minor discussion
> > ensued, and then the sample went off to the lab to be
> looked at by Dr.
> > Alan Rubin.? Of course, it's not worthwhile for
> anyone to classify
> > such a small OC when the 20/20 classification sample
> would only be 2
> > grams.? So I offered to reverse the usual 20/20
> arrangement - I'd keep
> > 2 grams and the lab could keep the 8g "main
> mass".? Now the
> > classification is official.
> >
> > I was hoping to sneak my name into the literature, but
> alas, I didn't
> > get to see my name in lights. LOL
> >
> > It should be noted, that for collectors, this is going
> to be one of
> > those impossible to acquire NWAs.? Given the low
> TKW and that 80% of
> > the mass is sitting at UCLA, that leaves a scant 2g on
> the collector
> > market.? A while back, I swapped a small endcut
> to Greg Catterton and
> > I still retain a 1g slice that is polished on one
> side.? If anyone
> > wants to make me an insane offer for the remaining 1g
> slice, I will
> > entertain all such offers.? ;)
> >
> >
> > >From the write-up :
> >
> > Northwest Africa 6696 (NWA 6696)
> >
> > Morocco
> >
> > Purchased: 2007
> >
> > Classification: Ordinary chondrite (LL3.6)
> >
> > Classification: Ordinary chondrite, LL3.7. The olivine
> Fa distribution
> > (Fa24.4?9.1) and low-Ca pyx Fs distribution
> (Fs12.3?7.1) are
> > appreciably more heterogeneous than those of Dhajala
> (type 3.8),
> > indicating a subtype <3.8. The meteorite contains
> abundant low-Ca
> > clinopyroxene with polysynthetic twinnning (indicating
> type <4) and
> > moderately abundant fine-grained matrix material (most
> consistent with
> > type 3.0-3.6). Clear chondrule glass is most abundant
> in type 3.0-3.5;
> > this meteorite lacks clear chondrule glass, implying a
> subtype >3.5.
> > Hence, 3.6 seems the most likely subtype.
> >
> >
> > Best regards,
> >
> > MikeG
> >
> >
> -------------------------------------------------------------------------
> >
> >
> > --
> > Galactic Stone & Ironworks - Meteorites &
> Amber
> >
> > Website - http://www.galactic-stone.com
> > Facebook - http://www.facebook.com/galacticstone
> > News Feed - http://www.galactic-stone.com/rss/126516
> > Twitter - http://twitter.com/galacticstone
> > EOM - http://www.encyclopedia-of-meteorites.com/collection.aspx?id=1564
> >
> -------------------------------------------------------------------------
> >
> >
> > ---
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Received on Fri 29 Apr 2011 03:06:19 PM PDT