[meteorite-list] Another LL3 of interest

[Michael L Blood]

Bernd,
        LOVE your run downs on my favorite rocks - those from space.
Wanny try lookin at this one I haven't cut yet?

http://community.webshots.com/photo/331010911/331012667IzQzQW

It is the remaining mass of  106g of an  LL3.2. The TKW was 126g, with 20g
sent to Ted Bunch for analysis. It came out of Africa about 2 or 3 years
ago, so there won't be any "paired" specimens coming after it. Ted Bunch
described it as: NWA 2769     126        1   LL3.2   S2      W2
1-37.2; Cr2O3 – 0.04 – 0.67 wt %
Only some of which I understand. I got the following:
NWA 2769 is the name
126 is the TKW
1 is the number of specimens
LL3.2 is the classification, which I think is pretty rare - (you know how
many?)
S2 = shock grade 2 
W2 =weathering grade 2,
but the rest is a bit cryptic.... Sure is PRETTY!
        Any of your expertise would be appreciated and enjoyed.
        Best wishes, Michael
        

on 4/25/05 8:21 AM, bernd.pauli at paulinet.de at bernd.pauli at paulinet.de
wrote:

>> This is sort of cool and unusual looking. Thought
>> somebody might like to see some photos:
> 
>> http://www.meteoriteshop.com/nwa2766.html
> 
> Hello Dean and List,
> 
> Congratulations on having acquired this extraordinary LL3.9
> and on having it classified. Now, what's so cool about it ?
> 
> 1) There are only four LL3.9 chondrites (as far as I know):
>  - Bo Xian     - DaG 180
>  - HaH 093     - NWA 083
> 
> 2) The large olivine Fa-range of Fa24 - Fa29, which is comparable
>  only to NWA 083 (Olivine Fa28.4 ± 5.0) - according to Met.Bull.
>  85,  2001 July, 083 was purchased by M. Farmer and M. Cotting-
>  ham in 8/2000 and the main masses are (still?) with the buyers.
> 
> 3) It seems to be unpaired with 083 because of the differing shock
>  and weathering stages: S5 - W1 for NWA 083 / S2 - W2 for Dean's.
> 
> 4) But the weirdest thing, if I got that right,... would be those barred
>  olivine chondrules containing FeS (troilite) either incorporated into
>  the chondrule bars or lining them (or interstitial), or maybe troilite
>  is present as chondrule rims - if the latter is the case, your meteorite
>  and the Antarctic L3 chondrite ALHA79045 would be the only ones in which
>  such chondrules have been found to date.
> 
> It is not unusual to find FeS in the surrounding matrix but quite rare
> to find troilite inside barred chondrules. I have never heard about
> that before, so again sincere congrats on this "goodie".
> 
> Any comments?
> 
> Best regards,
> 
> Bernd
> 
> To: deanbessey at yahoo.com
>   meteorite-list at meteoritecentral.com
> 
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