[meteorite-list] Stan's NWA 2965 EL6/7 and achondrite vs chondrite

From: stan . <laser_maniac_at_meteoritecentral.com>
Date: Fri, 01 Dec 2006 19:21:34 +0000
Message-ID: <BAY121-F55E618EB53EBB5B1EE755F0DA0_at_phx.gbl>

Mark,
didnt you read the auction for what you bid on? :)

the classification of this stuff as a 6/7 is SO 5 minutes ago. it's an
EL3... when NAU and other groups looked at this stuff they saw a fine
grained feild of enstatite and no chondrules. thats what lead them to call
it a recrystalized enstatite or an aubrite depending on the lab. After the
type specimin donations totaled about half a kg it was realized that this
stuff really DOES have chondrules - and not just relict ones either but
honest to goodness pristine un metamorphosed ones. this is type three
material - but material that just happend to have a chondrule density of a
few per square foot - or something ridiculous like that. the light grey/blue
lithology material - while typically reffered to as the 'fresher' material
by morrocain sources is aparently the more aqueously altered of the two
lithologies.

now if you want to talk about chondrules in achondrites - look at nwa 725 or
likely pairings. this is a winonaite that looks like a type 4 chondrite! but
let's not get the IAU in on this one - they might decide that all of our
rocks arent meteorites after all but 'minor impacting bodies from space' ;)


>Hello all,
>
>I received today a couple specimens of Stan's NWA 2965. This has been a
>somewhat controversal meteorite on the list, so forgive me for going around
>the controversy a little and showing some photographs of the meteorite. If
>anyone is interested in photographs of a higher res, drop me an e-mail.
>
>http://www.meteoritearticles.com/colnwa2965.html
>
>If I can start a different controversy around the meteorite....using the
>term chondrules with achondrites does not seem right to me. Not because
>achondrite means without chondrules, but because the round inclusions in
>achondrites have different origins. However, I like everyone else (?),
>lack
>a better term. Maybe the IAU can work on this next....:^)
>
>Clear Skies,
>Mark Bostick
>Wichita, Kansas
>www.meteoritearticles.com
>www.kansasmeteorites.com
>www.imca.cc
>
>
>______________________________________________
>Meteorite-list mailing list
>Meteorite-list at meteoritecentral.com
>http://six.pairlist.net/mailman/listinfo/meteorite-list

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Received on Fri 01 Dec 2006 02:21:34 PM PST