[meteorite-list] Bernd commentary on NWA 1955
From: tett <tett_at_meteoritecentral.com>
Date: Thu Apr 22 10:32:47 2004 Message-ID: <001b01c404a7$6204d570$6400a8c0_at_Tettenborn> Michael, I would like to buy a covered section of NWA1955. Any left? Mike Tettenborn aka tett Owen Sound, Ontario ----- Original Message ----- From: "Michael L Blood" <mlblood_at_cox.net> To: <meteorite-list_at_meteoritecentral.com> Sent: Sunday, March 07, 2004 6:10 PM Subject: Re: [meteorite-list] Bernd commentary on NWA 1955 > Hi all, > Matt Morgan was kind enough to sell be some of his unique > NWA 1955 which is the only type H/L 3-4. I had thin sections > made (some with cover sheets and some without, double polished > - for those who might want to do microprobe work). > Bernd bought one and was kind enough to share the email > below with me and Matt, AND to give me permission to foreword > it to the list.... > -- > "Hello Michael, hello Matt, > > My NWA 1955 thin section pics keep bugging me. The pic I am once > more attaching here seems to show what might be called a "contact > zone" where H material crashed into L material or vice versa. Look > at that sharp horizontal line dividing the pic into two halves. > [this is photo "1" at:] > > http://community.webshots.com/album/123759764tYCxcZ > > The lower part actually shows 4 different chondrules - magnification > 32x -- (plus one separate chondrule in the 5 o'clock position): > (1) an oval, barred olivine chondrule squeezed between two deformed > POP chondrules > (2) another large, colorful chondrule with long, thin laths in the 6 > o'clock position > These 4 chondrules have literally been pushed into/onto each other! > > JPEg #2 (magnification 56x) shows a PP chondrule (porphyritic pyroxene) > with a large, almost perfect, euhedral pyroxene crystal in the 8 o'clock > position - that's the "aesthetical" part of the story. This chondrule is > surrounded (not visible in the pic) by a thick, opaque rim which may > be serpentine. IF it is serpentine, this would point toward aqueous > alteration (such rims are well-known from Allende, Axtell, or other > carbonaceous chondrites). > > What if meteoriticists also find carbonaceous components in NWA 1955?! > A triple conglomerate: H - L - C? What an exotic personality, this NWA 1955! > > Best wishes, Bernd" > [then, in a later exchange he added] > "Anyone who is into thin sections and who misses out on this one, > is to be pitied." > > Photos at: > > http://community.webshots.com/album/123759764tYCxcZ > > > > > > -- > When Jesus said "Love your enemies" I think he probably > meant don't kill them. > Anonymous > -- > For perspective, try THIS: > http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html > -- > cool message fro Ben & Jerry: > www.TrueMajority.org/oreo > -- > AMAZING photos of Aurora Borealis, etc. > http://faculty.rmwc.edu/tmichalik/atmosphere.htm > -- > Hubble space telescope - AMAZING photos!: > http://wires.news.com.au/special/mm/030811-hubble.htm > -- > http://www.costofwar.com/ > -- > SUPPORT OUR TROUPS: > http://www.takebackthemedia.com/onearmy.html > -- > Worth Seeing: Earth at night from satellite: > http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg > -- > - Interactive Lady Liberty: > http://doody36.home.attbi.com/liberty.htm > -- > Earth - variety of choices: > http://www.fourmilab.ch/earthview/vplanet.html > -- > Michael Blood Meteorites: > http://www.michaelbloodmeteorites.com/ > > > > > ______________________________________________ > Meteorite-list mailing list > Meteorite-list_at_meteoritecentral.com > http://www.pairlist.net/mailman/listinfo/meteorite-list > Received on Sun 07 Mar 2004 07:50:41 PM PST |
![]() ![]() ![]() ![]() |