[meteorite-list] NEW Ungrouped Carbonaceous Chondrite - NWA 5958

From: Greg Hupé <gmhupe_at_meteoritecentral.com>
Date: Mon, 12 Mar 2012 01:21:44 -0400
Message-ID: <632DC20EB63C4573B3A75047C7275A0C_at_Gregor>

Dear List Members,

I would like to share some information about a special new meteorite:

NWA 5958 ? A Uniquely Primitive Ungrouped Carbonaceous Chondrite Meteorite
Type 3.00

NWA 5958 is a unique, highly unequilibrated, ungrouped carbonaceous
chondrite possessing extreme isotopic signatures. Oxygen isotopes measured
for bulk subsamples plot closer to values for the Sun than any other known
meteorite! This remarkable specimen should hold important information about
the nature and variety of materials in the earliest solar nebula. NWA 5958
is a very fresh meteorite that was purchased in Morocco in September 2009.
The Total Known Weight is just 286 grams in a single, fragmented stone. NWA
5958 is a very special early solar system sample!

Continuing study includes careful microanalysis of separated chondrules and
microscopic grains. As quoted by Dr. Irving, ?The superior freshness of this
new specimen makes it a very attractive candidate for such detailed work.?

Plane polarized light thin section image of NWA 5958 (width 14 mm) showing
numerous small, diverse objects in a very dark matrix.
http://www.lunarrock.com/nwa5958/nwa5958_14mm.jpg

To read about some of the early findings NWA 5958 has revealed, and to see
thin section images, please follow the two abstract links below.

Link to Abstract:
PETROLOGY AND EXTREME OXYGEN ISOTOPIC COMPOSITION OF TYPE 3.00 CARBONACEOUS
CHONDRITE NORTHWEST AFRICA 5958: A UNIQUE, PRIMITIVE, O-RICH EARLY SOLAR
SYSTEM SAMPLE.
http://www.lpi.usra.edu/meetings/lpsc2011/pdf/2343.pdf

Link to Abstract:
THE TRACE ELEMENT CHEMISTRY OF NORTHWEST AFRICA 5958, A CURIOUS PRIMITIVE
CARBONACEOUS CHONDRITE.
http://www.lpi.usra.edu/meetings/lpsc2011/pdf/2325.pdf

Best Regards,
Greg

====================
Greg Hup?
The Hup? Collection
gmhupe at centurylink.net
www.LunarRock.com
NaturesVault (eBay)
IMCA 3163
====================
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Received on Mon 12 Mar 2012 01:21:44 AM PDT