Most folks believe that the chondrites are from undifferentiated, unmelted
asteroids. Hence, they would not be expected to have iron cores. That
said, those researchers who believe that asteroids are heated internally
(the majority), by the decay of short-lived radionuclides like Al-26, aver
that the interiors of asteroids are highly metamorphosed. Some might
suggest that the deep interiors were partially melted. If asteroids were
heated mainly be collisions (a minority viewpoint that I share), then the
interiors wouldn't be expected to be appreciably hotter than the surfaces
and the asteroids would remain undifferentiated.
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
405 Hilgard Avenue
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: aeru...@ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
----- Original Message -----
From: "Melanie Matthews" <miss_meteor...@yahoo.ca>
To: "Jeff Kuyken" <i...@meteorites.com.au>; <bar...@univ-brest.fr>
Cc: "Meteorite List" <meteorite-list@meteoritecentral.com>
Sent: Tuesday, August 31, 2010 9:13 AM
Subject: Re: [meteorite-list] Any irons/stony-irons linked to known stones?
Is it theorized that the parent asteroids of ordinary and carbonaceous
chondrites, might be differentiated with iron cores?
-----------
-Melanie
IMCA: 2975
eBay: metmel2775
Known on SkyRock Cafe as SpaceCollector09
I eat, sleep and breath meteorites 24/7.
----- Original Message ----
From: Jeff Kuyken <i...@meteorites.com.au>
To: bar...@univ-brest.fr; Melanie Matthews <miss_meteor...@yahoo.ca>
Cc: Meteorite List <meteorite-list@meteoritecentral.com>
Sent: Tue, August 31, 2010 4:54:07 AM
Subject: Re: [meteorite-list] Any irons/stony-irons linked to known
stones?
I've been reading up recently on various parent-bodies etc and there are a
bunch
of theories out there regarding various irons and stones. One that I can
think
of off the top of my head is that some consider the Horse Creek iron to
have a
potential origin in common with the Aubrites and/or Enstatite Chondrites.
Cheers,
Jeff
----- Original Message ----- From: <bar...@univ-brest.fr>
To: "Melanie Matthews" <miss_meteor...@yahoo.ca>
Cc: "Meteorite List" <meteorite-list@meteoritecentral.com>
Sent: Tuesday, August 31, 2010 4:37 PM
Subject: Re: [meteorite-list] Any irons/stony-irons linked to known
stones?
Hi,
at present, excepted winonaites with IAB irons, no known group of iron is
connected to a group of achondrite.
The situation is slightly different for mesosiderites and pallasites. The
silicate portion of the mesosiderites is certainly linked to HEDs but the
metal
and the silicates are not genetically linked. Concerning pallasites, they
have
been considered to be linked with IIIAB irons, but that's really unlikely
(see
the recent paper in PSRD by Scott...).
Again, it is unlikely that the large impact basin in Vesta displays the
core
of
the body...
cheers
Jean-Alix
Selon Melanie Matthews <miss_meteor...@yahoo.ca>:
Are any chondrites and/or achondrites suspected as originating from the
same
parent body as any known irons and stony-irons?
Someone mentioned something asking about the possibility of some irons
coming
from 4 Vesta in another thread, not too long ago...
Cheers
-----------
-Melanie
IMCA: 2975
eBay: metmel2775
Known on SkyRock Cafe as SpaceCollector09
I eat, sleep and breath meteorites 24/7.
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