[meteorite-list] Udei Station vs. NWA4024 winonaite types

[Greg Hupe]

Hi Mike Tett.,

What I understand is that Winonaites are essentially the 'pop-out' silicates 
from silicated irons, the non-iron inclusions. Basically, if someone were to 
extract the silicates from silicated irons, they would have Winonaites left 
over. There are several list members who can explain all this better than my 
quick layman description.

Best Regards,
Greg

====================
Greg Hupe
The Hupe Collection
gmhupe at centurylink.net
www.LunarRock.com
IMCA 3163
====================
Click here for my current eBay auctions: 
http://search.ebay.com/_W0QQsassZnaturesvault
-----Original Message----- 
From: tett
Sent: Saturday, February 26, 2011 6:39 AM
To: meteorite-list at meteoritecentral.com
Subject: [meteorite-list] Udei Station vs. NWA4024 winonaite types

List,

When stumbling across an ad for NWA4024 I saw pictures of the meteorite
and immediately thought how similar it looks to Udei Station.  Comparing
the pics of NWA4024 and my slices of Udei Station reveal very similar
compositions.  However, NWA4024 is classiifed as a winonite where as
Udei Station is classified as an IAB iron.

Further research shows that it is likely Udei Station and other IAB
irons along with Winonites come from the same parent body.   My question
is, what is the dividing line between Winonites and IAB's?  How does one
decide which group the meteorite should fall?  Is it %Fe?

Thanks for any help and

Cheers!

Mike Tettenborn
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