[meteorite-list] Chondritic parent bodies

From: tracy latimer <daistiho_at_meteoritecentral.com>
Date: Wed, 9 Sep 2009 20:22:48 +0000
Message-ID: <SNT120-W49D00DBC3D3950D6BC6E98CAE90_at_phx.gbl>

Oog. I agree with Bernd; classification is currently a mess. We discussed this a couple of years ago, but it seems any clarifications are very slow to work their way into the literature. Has the NomCom issued any official bulletins on this?
 
Best!
Tracy latimer

----------------------------------------
> To: Meteorite-list at meteoritecentral.com
> From: bernd.pauli at paulinet.de
> Date: Wed, 9 Sep 2009 19:03:24 +0000
> Subject: [meteorite-list] Chondritic parent bodies
>
> Hello All,
>
> I'm really glad that Jeff G. responded because I didn't know whether or not I should
> mention his thoughts of about 10 years ago (!) when I asked him about hyphens and
> dashes and the confusion they cause! I was inquiring about DaG 140, then classified
> as an H3.9-6.
>
> Mon, 07 Sep 1998, Jeff wrote (excerpt):
>
> 1) The hyphen implies a continuous range, and also implies that there
> is no dominant lithology in the breccia. Yet, DaG 140 could be:
>
> a) a type 3 chondrite with a single equilibrated clast found;
> b) a type 6 chondrite with a single type 3 clast found;
> c) a mixture of types 3, 4, 5, and 6 material;
> d) a light-dark breccia with mostly comminuted matrix and only a few clasts, including type 3 and 6 ones.
>
> So, right now we have a literature polluted with this and other nomenclatures
> (like using a "/" instead of a "-" for the same thing), ...
>
> Slashes (e.g., L5/6) indicate transitional classes, hyphens (e.g., H5-6) indicate breccias, ...
>
> Best wishes,
>
> Bernd
>
>
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Received on Wed 09 Sep 2009 04:22:48 PM PDT