[meteorite-list] Met Bulletin Update - Sau 559 (Ureilite)

From: John Cabassi <john_at_meteoritecentral.com>
Date: Thu, 16 May 2013 20:15:42 -0700
Message-ID: <CAFBTX4z8bGsdyTANeSeb_cjR=wOk0Dcvb2KezOE_vVPGo7-6xQ_at_mail.gmail.com>

Thanks Mike. That is awesome and a big congrats to John. He's been
very quiet lately, maybe he is still out on that same archaeological
site.

On Thu, May 16, 2013 at 8:00 PM, Galactic Stone & Ironworks
<meteoritemike at gmail.com> wrote:
>
> Hi Bulletin Watchers,
>
> One new approval today. It is an old Oman find from 2005. Apparently
> this ureilite was very stubborn and it chewed up several blades before
> it could be subdued by the saw.
>
> Text -
>
> Sayh al Uhaymir 559 (SaU 559) 20?33.046?N, 56?39.336?E
>
> Al Wusta, Oman
>
> Found: Nov 2005
>
> Classification: Ureilite
>
> History: During November 2005, John Blennert found a 107 g meteorite
> in the desert of Oman.
>
> Physical characteristics: Exterior of the stone is rough, with
> preferential (wind?) ablation of the pyroxene over olivine grains.
> Difficult to cut, requiring seven diamond blades and one week to slice
> the stone in half. Surface of the polished thin section is rough.
>
> Petrography: Typical ureilite dominated by roughly equal proportions
> of anhedral, fine- to medium-grained (0.5 to 1 mm) olivine and
> pyroxene. No graphite visible in the thin section. Extensive reduction
> of the olivine. Diamond abundant and confirmed by powder X-ray
> diffraction. Diamond clusters to 20 ?m visible with a reflected-light
> microscope. Interstitial metal mostly altered to iron oxides.
>
> Geochemistry: Olivine and pyroxene more reduced than in typical
> ureilites. Olivine cores have Fa5.2?0.1, FeO/MnO = 11.5?0.7, Cr2O3 to
> 0.5 wt%, CaO to 0.3 wt%, n=13, rims to Fa0.5. Low-Ca pyroxene cores
> Fs4.7?0.1Wo4.89?0.04, n=7.
>
> Classification: Ureilite.
>
> Specimens: 32 g and one thin section at ASU.
>
> Link - http://www.lpi.usra.edu/meteor/metbull.php?code=57462
>
> Best regards,
>
> MikeG
> --
> -------------------------------------------------------------
> Web - http://www.galactic-stone.com
> Facebook - http://www.facebook.com/galacticstone
> Twitter - http://twitter.com/GalacticStone
> Pinterest - http://pinterest.com/galacticstone
> RSS - http://www.galactic-stone.com/rss/126516
> -------------------------------------------------------------
> ______________________________________________
>
> Visit the Archives at http://www.meteorite-list-archives.com
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
Received on Thu 16 May 2013 11:15:42 PM PDT