Dear Zelimir:
Schreibersite (an iron-nickel phosphide) occurs
in iron meteorites and it also occurs in some
lunar impact-melt breccias, particularly those
from Apollo 16. There is evidence that a subset
of the Apollo 16 impact-melt breccias was formed
by impact of an iron meteorite (the
Dear Randy list,
Randy, I fully appreciated your very explicit statement regarding
metallic phases in lunars.
This is actually important and fundamental regarding the orgin of
metal or the history of lunar meteorites (and other) and I am
surprised of the lack of reactions.
I have here a
Tom, would you please send me those pictures?! This sounds very interesting.
Several lunar meteorites do have metal flecks and their FeNi usually is quite
nickel-rich (for example: 7-48 wt% Ni in Dhofar 301).
Best Sunday
Wishes,
Bernd
__
Dear Tom:
All brecciated lunar meteorites contain some FeNi metal (1%), but
you may have to look hard in some. (In others, like NWA 5000, you
don't have to look hard at all.) The metal derives from impacts of
asteroidal meteorites with the Moon. If the meteorite is an
impact-melt breccia,
Hi list, I had a question about an iron fleck I found in a thin section of
NWA 2977 Lunar. Jim Strope sent it to me.
I plan to use this as next months Meteorite Times Micro Vision and want to
be accurate.
The thin is polished to 1/4 micron. This sometimes has the same effect as
etching
Hi Tom,
That is very interesting. Did you find anything similar in the NWA 5000,
just curious. You can send a pic my way. I love making a fool of myself. But
seriously, I would like to try and give some input.
Cheers
Johnno
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To:
Hi Tom
Please email your micrographs.
From what I have read, the Widmanstatten pattern has plate sizes that change
in size due to the rate of cooling, so a 'mini' pattern might not be
possible. But
then again, why not at a micro scale?
Good question.
Cheers,
Roman Jirasek
- Original
I wouldn't mind a pic or two as well.
I'm not an Expert, but I've done quite a bit of
reading and who knows, maybe I'll do something
stupid and come up with something.
de Pete
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Sent: Saturday, August 09,
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