[meteorite-list] Any irons/stony-irons linked to known stones?

From: Alan Rubin <aerubin_at_meteoritecentral.com>
Date: Tue, 31 Aug 2010 09:19:24 -0700
Message-ID: <C7F1B21F94574B969F076C761A233466_at_igpp.ucla.edu>

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: aerubin at ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html


----- Original Message -----
From: "Melanie Matthews" <miss_meteorite at yahoo.ca>
To: "Jeff Kuyken" <info at meteorites.com.au>; <barrat at univ-brest.fr>
Cc: "Meteorite List" <meteorite-list at 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 <info at meteorites.com.au>
> To: barrat at univ-brest.fr; Melanie Matthews <miss_meteorite at yahoo.ca>
> Cc: Meteorite List <meteorite-list at 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: <barrat at univ-brest.fr>
> To: "Melanie Matthews" <miss_meteorite at yahoo.ca>
> Cc: "Meteorite List" <meteorite-list at 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_meteorite at 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.
>>>
>>>
>>>
>>>
>>> ______________________________________________
>>> Visit the Archives at
>>> http://www.meteoritecentral.com/mailing-list-archives.html
>>> Meteorite-list mailing list
>>> Meteorite-list at meteoritecentral.com
>>> http://six.pairlist.net/mailman/listinfo/meteorite-list
>>>
>>
>>
>>
>> ______________________________________________
>> Visit the Archives at
>>http://www.meteoritecentral.com/mailing-list-archives.html
>> Meteorite-list mailing list
>> Meteorite-list at meteoritecentral.com
>> http://six.pairlist.net/mailman/listinfo/meteorite-list
>>
>>
>
>
>
> ______________________________________________
> Visit the Archives at
> http://www.meteoritecentral.com/mailing-list-archives.html
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
Received on Tue 31 Aug 2010 12:19:24 PM PDT