[meteorite-list] [More Loaded] NEW Ungrouped Achondrite - NWA 5297

From: Greg Hupe <gmhupe_at_meteoritecentral.com>
Date: Sat, 27 Feb 2010 20:46:34 -0500
Message-ID: <D8A546C67C1D4258A79D44DAD744A1C5_at_Gregor>

Dear List Members,

To my surprise and dismay to a few eBay watchers, all but one of the NWA
5297 specimens sold out so far so I loaded the rest that I have above
1/4-gram in case you were interested in one of these Ungrouped Achondrites!
One 1/2-gram piece has two large metal grains!

Looks like I priced this unique meteorite aggressively low! :-)

Thank you to everyone who has purchased some of these, I appreciate it!

Greg


On 2/25/10, Greg Hupe <gmhupe at htn.net> wrote:
> Dear List Members,
>
> I would like to announce a new Ungrouped Achondrite, NWA 5297.
>
> NWA 5297 is an Ungrouped Achondrite that was found in Morocco in early
> 2008.
> A total of nine small dark stones were collected with a combined Total
> Known
> Weight of just 130 grams. NWA 5297 does not fit in any of the known
> classification types, making it a very unusual meteorite.
>
>
>
> Image of 12.9g main mass:
>
> http://www.lunarrock.com/nwa5297/nwa5297e.jpg
>
>
>
> Image of 2.9g complete slice with large metal grain:
>
> http://www.lunarrock.com/nwa5297/nwa5297f.jpg
>
>
>
> Classification submitted to the Meteoritical Bulletin for NWA 5297:
>
> Northwest Africa 5297
>
> Morocco
>
> Find: March 2008
>
> Achondrite (ungrouped)
>
> History: Found near Alargoug, Morocco in March 2008 and purchased in June
> 2008 by Greg Hup? from a Moroccan dealer.
>
> Physical characteristics: A total of nine dark stones with visible metal
> and
> a combined weight of 130 g.
>
> Petrography: (A. Irving and S. Kuehner, UWS) This specimen has a
> poikiloblastic metamorphic texture with no chondrules and contains
> relatively abundant (~10 vol. %) Ni-rich metal. The major phases are
> olivine, orthopyroxene, taenite and very sodic plagioclase with minor
> Ni-bearing troilite.
>
> Geochemistry: Olivine (Fa28.6, FeO/MnO = 54.4), plagioclase
> (Ab86.2An9.1Or4.7), taenite (~10 wt.% Ni). Oxygen Isotopes (D. Rumble,
> CIW): replicate analyses of acid-washed silicate material by laser
> fluorination gave, respectively: d18O = 4.830, 5.032; d17O = 3.711, 3.818;
> D17O = 1.171, 1.171 per mil.
>
> Classification: Achondrite (ungrouped). This specimen is a metachondrite
> with an oxygen isotopic composition like those of LL chondrites; however,
> it
> contains too much metal to be regarded as a product of metamorphism of
> typical LL chondrites, and the olivine composition is outside the range
> for
> equilibrated LL chondrites.
>
> Specimens: A total of 20 g of sample and one polished thin section are on
> deposit at UWS. The main mass is held by Mr. Greg Hup? (GHup?).
>
> Enjoy!
>
> Best regards,
> Greg
>
> ====================
> Greg Hupe
> The Hupe Collection
> NaturesVault (eBay)
> gmhupe at htn.net
> www.LunarRock.com
> IMCA 3163
> ====================
> Click here for my current eBay auctions:
> http://search.ebay.com/_W0QQsassZnaturesvault
>
>
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-- 
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Mike Gilmer - Galactic Stone & Ironworks Meteorites
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Received on Sat 27 Feb 2010 08:46:34 PM PST