[meteorite-list] DIs in Fred's TAN 057

[David Weir]

Hello Frederic,

Do you have any idea why your Tanezrouft 057 is listed in an article in 
the August 2005 MAPS - "A weathering index for CK and R chondrites", 
A.E. Rubin and H. Huber - as a CK5 rather than a C4-An? In the article 
they also assign Tanezrouft 057 a weathering index of wi-4, or highly 
weathered, which may be analogous to the old W3 category of Wlotzka.

I had been considering adding a small specimen to my collection given 
its unique classification, but I have a representative collection of the 
CK chondrites already. Evidently the thin section studied by Rubin (UCLA 
1801) has resulted in a slightly different conclusion than MNHN Paris & 
Blaise Pascal University - Clt. Fd. Maybe you can shed some light on 
this classification ambiguity?

Regards,

David