Dear
Steven, Michel and Doug,
This
is a fairly good picture of the meteorite. I looks to me like a chondrule-poor
portion of an ordinary chondrite (L or LL), for example like Ramsdorf (L6-S5),
which has large portions without any chondrules as well as the typical
chondrule-bearing material (the latter is rare in Ramsdorf). I have also seem
such kind of material as clasts in LL chondrites, which sometimes can be
cm-size. Keep in mind that some ordinary chondrites don't show any chondrules
due to high metamorphism or impact melting.
Regarding high-K values due to terrestrial
contamination: If this was the case with this stone, it should be reflected also
in high levels of other minor and trace elements such as Na, Ba and
Sr.
There
is a nice publication o K-rich lithologies in ordinary chondrites (i.e. Acfer
066, Acfer 160, HaH 060, Adzhi-Bogdo, Jelica, or Krahenberg (all LL chondrites):
Mineralogy and chemical composition of K-rich
lithology, A.Jaeckel and A.Bischoff, MAPS, 1997, 32, p.A66 (abs.); see also,
MAPS, 1998, 33, p.A77 (abs.)
Best
regards,
Jörn
___
Joern Koblitz MetBase Editor The MetBase Library of
Meteoritics and Planetary Sciences Benquestrasse 27 D-28209 Bremen,
Germany phone: +49 421 24 100 24
fax: +49 421 168 2799 email: [EMAIL PROTECTED] ___
-Ursprüngliche Nachricht-Von: Steven Drummond
[mailto:[EMAIL PROTECTED]Gesendet: Mittwoch, 23. Juni 2004
20:28An: metlistBetreff: [meteorite-list] Possible
Sahara 03500 Paired stone
Hi List,
I was going to save this for later but here goes , I have what
looks like a paired stone to Michel Franco's Sahara 03500
But this stone is somewhat
different as it shows clearly what looks like chondrules in the darker
material.
Someone has stated that he thinks Michel's
stone is a huge clast, Michel's stone doesn't show any of this chondrule
material like my stone does, and if paired with Michel's stone could show the
reason why Michel has a problem with his classification . I am not going
to speculate any further on this one, I will leave it up to the Scientists if
they so choose to investigate this stone further.
Anyway here is the
link to a huge picture of a 44 gram main mass of my stone that was originally
69 grams. Please excuse the crude web site.
Scroll down to the large picture
. http://www.unknowncollector.com/
Any and all comments are welcome .
Best Regards to all,
Steven Drummond
__
Meteorite-list mailing list
[EMAIL PROTECTED]
http://six.pairlist.net/mailman/listinfo/meteorite-list
