[meteorite-list] TAFASSASSET? Ay new info?

From: tett <tett_at_meteoritecentral.com>
Date: Wed, 16 May 2007 18:17:58 -0400
Message-ID: <001a01c79808$0fb307e0$6400a8c0_at_tettenborn>

Jason and List,

Actually Tafassasset matches closely to Renazzo(CR2) w.r.t. oxygen isotopes.

See the paper "TAFASSASSET: AN EQUILIBRIATED CR CHONDRITE"
http://www.lpi.usra.edu/meetings/lpsc2002/pdf/1611.pdf

That said, subsequent papers do argue that Tafassasset is more like a
Brachinite.
http://www.lpi.usra.edu/meetings/lpsc2003/pdf/1370.pdf
This paper does go on to say that perhaps Tafassasset is a brachinite whose
parent body was different from most other brachinites and perhaps its parent
body was composed of CR chondrite-like material.

Also see:
http://www.lpi.usra.edu/meetings/lpsc2007/pdf/2086.pdf

Cheers,

Mike Tettenborn




----- Original Message -----
From: "Jason Utas" <meteoritekid at gmail.com>
To: "tett" <tett at rogers.com>
Sent: Sunday, May 13, 2007 9:46 PM
Subject: Re: [meteorite-list] TAFASSASSET? Ay new info?


> Hello Mike,
> Well, it's not an equilibrated CR - the oxygen isotope plots are in
> the H-chondrite range...as far as I know, dealers were just putting
> that out there to move it, because that's been known for a good while.
> Chemically it's...kind of....similar to a CR (if you want it to be,
> you could say it was, I suppose), but as far as I can tell, it's
> really just 'ungrouped' in nearly every sense of the word.
> Regards,
> Jason
>
>
> On 5/13/07, tett <tett at rogers.com> wrote:
>> Hello List!
>>
>> Was wondering if there was any new information available, including new
>> research results, on Tafassasset.
>>
>> I was fortunate in aquiering a nice slice and am now curious on where
>> this
>> meteortie stands. The met. base still gives this a dual listing of both
>> a
>> CR Chondrite and a Primative Achondrite (PAC). Are there any new
>> arguments
>> which point to which classification is correct?
>>
>> Cheers and Thanks,
>>
>> Mike Tettenborn
>> Owen Sound, Ontario, Canada
>>
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>
Received on Wed 16 May 2007 06:17:58 PM PDT