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Fwd: Ninqiang classification - Is that your final answer



Happy Thanksgiving everybody:

The Ninqiang Carbonaceous chondrite classification question has been further 
pondered by Dr. Rubin of UCLA.  Here's his most interesting reply.

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When we initially described Ningqiang we called it a CV3-an, because it was
closest in composition and petrologic properties to CV chondrites.  When we
later described the CK group, we reclassified Ningqiang as CK3-an,
recognizing that it was closer in its bulk composition to CK than CV.
Nevertheless, we recognized at the time that its abundance of refractory
lithophile elements was lower than those in the other CK chondrites.  It
seems clear that Ningqiang is an ungrouped C3 chondrite, perhaps someday to
be called a CN3 (where the N is for Ningqiang).  It is the first member of a
new carbonaceous chondrite group that is related to CV and CK, i.e., part of
the CV-CK clan although from a different parent body.
Alan Rubin
-----Original Message-----
From: MARSROX@aol.com <MARSROX@aol.com>
To: rubin@igpp.ucla.edu <rubin@igpp.ucla.edu>
Date: Wednesday, November 24, 1999 3:11 PM
Subject: Ninqiang classification - Is that your final answer


>Dr. Rubin:
>
>Since Joel (M!) tells me that you "peer review" submissions to his
magazine,
>I'll assume that you recognize my name.
>
>There's a little academic/commercial controversy surrounding the
>classification of Ninqiang (carb. chondrite).  I'm aware of work you did in
>the late 1980's on it but there's been quite a bit more written on this one
>since, obviously it's a tough chinese cookie to classify.  Some of the
>classifications suggested since your papers are CK -Anom, CK4, CV3, CK3
>-Anom, and lately C3 - Ungrouped (as per Met Base V4.0) and C3 -Anom.
>
>I'd like to pass on the the meteorite "community-at-large" an authoritive
>word. What sayest thou now?
>
>Best regards,
>
>Kevin Kichinka

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