[meteorite-list] NWA 773 lunar pairings

From: Jeff Grossman <jgrossman_at_meteoritecentral.com>
Date: Mon Jul 31 17:11:55 2006
Message-ID: <7.0.1.0.2.20060731170917.0355cdf8_at_usgs.gov>

This answer comes from Randy Korotev, emailed to me in response to
Dave's question:

>If these stones really are all from one meteorite, which is my
>working hypothesis, it is the most lithologically (rock-type)
>complex lunar meteorite there is. It's a coarse-grained
>breccia. On my web site, I call it "complex fragmental and regolith
>breccia consisting of basalt and cumulate olivine gabbro." The
>different stones are each different pieces of the elephant, the thin
>sections are (too) small, and the stones have not all been described
>by the same petrologists.
>
>Our reasons for believing that they're all paired are described in
>our MetSoc abstract:
>
>http://www.lpi.usra.edu/meetings/metsoc2006/pdf/5235.pdf
>
>I haven't actually seen NWA 2700 yet, though. The abstract should
>have stressed that in detail there's no sample in the Apollo
>collection like any of the rock types in this meteorite. It would
>be a real coincidence if they're not all related (two or more
>impacts into a unique, anomalous area).

Jeff

At 04:27 PM 7/31/2006, Dave Carothers wrote:
>Good evening, all.
>
>Can someone please help me out with an explanation?
>
>In looking at the Met Bul classifications of the "pairings" we have:
>
>NWA 773, Lunar cumulate olivine norite with regolith breccia
>NWA 2700 Classification pending
>NWA 2727 Lunar mare basalt/gabbro breccia
>NWA 2977 Lunar gabbro
>NWA 3160 Lunar mare basalt breccia
>NWA 3333 Classification pending
>
>To my military mind, it seems to me that the classifications of the above
>Lunars are divergent enough to wonder how they could be paired. If they are
>truely paired, shouldn't the original classifications been the same or
>closer?
>
>Thanks,
>
>Dave
>----- Original Message -----
>From: "David Weir" <dgweir_at_earthlink.net>
>To: "Meteorite List" <meteorite-list_at_meteoritecentral.com>
>Sent: Monday, July 31, 2006 3:23 PM
>Subject: [meteorite-list] NWA 773 lunar pairings
>
>
> > List,
> >
> > Well, the results are in - in the MetSoc 69th Annual Meeting abstract
> > #5235 that is... and just as I had suspected, NWA 773 has any brothers
> > and sisters: NWA 2700 (previously with Boswell), 2727 (Oakes et al.),
> > 2977 (Farmer), 3160 (Hupe), and 3333 (Kuntz) are all considered to be
> > paired by the eminent scientists Zeigler, Korotev, Jolliff, Bunch, and
> > Irving. Of course, I'm not sure the NomCom rules allow such an official
> > pairing with NWA 773 after the fact, especially with no reliable
> > geographic coordinates. But then a future peer-reviewed journal
> > publication could make it officially "official" I believe. No matter,
> > the abstract is more than convincing if your own eyes have ever cast
> > doubt on their pairing. I have some revisions to make on my site.
> >
> > David
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> >
>
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Dr. Jeffrey N. Grossman phone: (703) 648-6184
US Geological Survey fax: (703) 648-6383
954 National Center
Reston, VA 20192, USA
Received on Mon 31 Jul 2006 05:11:47 PM PDT