[meteorite-list] NEW - Intriguing Ungrouped Achondrite - NWA 6704

[karmaka]

Fascinating material !!!

Nice to see you back in business again.

Good luck with the NEW naturesvault !

Martin


-----Ursprüngliche Nachricht-----
Von: "Greg Hupé" <gmhupe at centurylink.net>
Gesendet: 31.05.2011 14:16:12
An: meteorite-list at meteoritecentral.com
Betreff: [meteorite-list] NEW - Intriguing Ungrouped Achondrite - NWA 6704

>Dear List Members,
>
>Over the last four months I have been reorganizing my company to make things
>easier for me in order to better serve the meteorite community.
>To start my official Grand Re-Opening, I have the honor and privilege to
>introduce to you...
>
>
>Northwest Africa 6704...
>...a 'most intriguing' New Ungrouped Achondrite.
>
>NWA 6704 is a most intriguing meteorite unlike any others known to man! Not
>only does it have tremendous scientific value, it is one of the most
>visually appealing meteorites with its dazzling display of yellowish-green
>orthopyroxene crystals containing small grains of olivine and chromite
>surrounded by large intercumulus grains of albite enclosing small grains of
>awaruite (a rare very nickel-rich metal alloy). Oxygen isotope results plot
>this achondrite within the field for acapulcoites-lodranites, but that is
>where any comparison stops. NWA 6704 is unlike any other meteorite! If that
>isn’t enough, this incredible meteorite contains an abundance of ‘bubble
>trains’ within the orthopyroxene which appear to be devoid of fluid upon
>initial inspection. Ongoing analyses are currently being performed to
>measure the cosmogenic noble gases to determine its CRE age (time spent in
>space) and to possibly detect trapped gases or even atmosphere from the NWA
>6704 parent body!
>
>Close-up image of the NWA 6704 matrix:
>http://www.lunarrock.com/nwa6704/nwa6704matrix.jpg
>
>Bubble trains and cleavages in orthopyroxene (width of field 0.593 mm)
>http://www.lunarrock.com/nwa6704/nwa6704bubbleTrain1.jpg
>
>Bubble trains and cleavages in orthopyroxene (width of field 0.237 mm)
>http://www.lunarrock.com/nwa6704/nwa6704bubbleTrain2.jpg
>
>NWA 6704 has a Total Known Weight of 8387 grams in a single, naturally
>fractured stone that was discovered in Northwest Africa in 2010. In their
>eagerness to see what was ‘inside’ the stone, the Algerian finders
>unfortunately broke the largest pieces, as can be seen in the image of the
>reassembled stone below. Also visible are the natural breaks along extended
>segment boundaries which have been sandblasted over time in the Sahara,
>smoothing the edges on the largest pieces and a more ‘rounding’ of the
>smaller fragments. Oddly, NWA 6704 is almost entirely devoid of visible
>fusion crust; only a single 1.5cm x 2cm patch exists, raising questions as
>to how this can be. Through a determined effort over a four month period,
>the distributed parts were purchased by Greg Hupé and reassembled into a
>single stone resembling a ‘puzzle’. It is remarkable that the finders were
>able to collect even the smallest of fragments!
>
>Reassembled mass of the NWA 6704 ‘puzzle’ meteorite (measures 27cm x 16cm x
>14cm):
>http://www.lunarrock.com/nwa6704/nwa6704complete1.jpg
>
>Close-up image of only fusion crust ‘patch’ on NWA 6704 (measures 1.2cm x
>2cm):
>http://www.lunarrock.com/nwa6704/nwa6704crust1.jpg
>
>Thin section image of NWA 6704 in cross-polarized light (width of field 5
>mm):
>http://www.lunarrock.com/nwa6704/nwa6704ThinSection1.jpg
>
>Officially accepted classification of NWA 6704 entered in the Meteoritical
>Bulletin:
>http://www.lpi.usra.edu/meteor/metbull.php?code=53609
>(Note: the TKW is 8387 grams with 42 pieces, entry errors should be
>corrected soon).
>
>Best Regards,
>Greg
>
>====================
>Greg Hupé
>The Hupé Collection
>gmhupe at centurylink.net
>www.LunarRock.com
>NaturesVault (eBay)
>AncientDiscoveries (eBay)(formerly 'NaturesVault')
>IMCA 3163
>====================
>Click here for my current eBay auctions, I have two accounts now:
>1) NaturesVault - http://search.ebay.com/_W0QQsassZnaturesvault
>2) AncientDiscoveries (formerly 'NaturesVault') -
>http://shop.ebay.com/ancientdiscoveries/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
>
>
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