[meteorite-list] New lunar meteorite

From: stan . <laser_maniac_at_meteoritecentral.com>
Date: Wed Jul 6 00:48:25 2005
Message-ID: <BAY101-F1151A063FC343431EE17AAF0D90_at_phx.gbl>

so then has it be reclassified - twice - the original classification from
NAU calls it: 'cumulate olivine norite with regolith breccia'???



>From: "Adam Hupe" <raremeteorites_at_comcast.net>
>To: <meteorite-list_at_meteoritecentral.com>
>Subject: Re: [meteorite-list] New lunar meteorite
>Date: Tue, 5 Jul 2005 21:42:18 -0700
>
>NWA 773 is not a Norite.
>
>NWA 773
>The cumulate is coarse grained and the thin sections are small, so the
>modal
>mineral proportions obtained from different sections do not agree well.
>Because augite and pigeonite, both clinopyroxenes, dominate over
>orthopyroxene, which is at most "minor" (Korotev et al., 2002), the
>cumulate
>is a gabbro, not a norite. Specifically, it is an olivine gabbro because
>olivine exceeds 10%. If plagioclase is actually <10%, then it's a
>peridotite
>
>Here is a link that will clarify the misclassification:
>http://epsc.wustl.edu/admin/resources/meteorites/nwa773.html
>
>Kind Regards,
>
>Adam
>
>
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Received on Wed 06 Jul 2005 12:48:22 AM PDT