[meteorite-list] Mundrabilla designation question

From: John Birdsell <birdsell_at_meteoritecentral.com>
Date: Sun Jan 16 11:47:41 2005
Message-ID: <41EA9AA5.4070708_at_email.arizona.edu>

Hello Martin and List. According to Wasson and Kallemeyn (2002)
Geochimica et Cosmochimica Acta, Vol. 66, No. 13, pp. 2445?2473.

"The members of the Mundrabilla duo, Waterville (1.63) and Mundrabilla
(1.64), are FeS-rich irons, closely related to each other in structure
and composition. They are within the sLL scatter field on most diagrams,
but plot slightly low on the Ga-, Ge-, and W-Au diagrams. Because of
these discrepancies and their very high FeS contents, we list them as
ungrouped but they could also be designated anomalous members of the sLL
subgroup."


Hope this helps!


-John & Dawn
Arizona Skies Meteorites





Martin Altmann wrote:

>Sal? list,
>
>in painting my specimen chits, I ask myself, how to denominate Mundrabilla
>correctly.
>Old Catalogue has simply "IRANOM", 2000er Grady Catalogue says "IIICD" and
>"anomalous",
>now with the finer Au-stuff and the subgroups, I read, that Mundrabilla and
>Waterville are close to sLL.
>
>Shall I write now IAB-ANOM?
>
>Will the "anomalous" disappear, if the five-of-a-kind-rule for the subgroup
>is fullfilled and beside Waterville, three other Mundrabilla-like irons will
>habe been found?
>Or refers the "anom" to the troilites, silicates or to the smallness of the
>taenite crystals (which make etched Mundrabillas to the most beautiful
>irons, one can imagine. One of my favourites)?
>
>Thanks!
>Martin
>
>______________________________________________
>Meteorite-list mailing list
>Meteorite-list_at_meteoritecentral.com
>http://six.pairlist.net/mailman/listinfo/meteorite-list
>
>
>
Received on Sun 16 Jan 2005 11:47:33 AM PST