[meteorite-list] CAI inclusions

From: Richard Montgomery <rickmont_at_meteoritecentral.com>
Date: Sun, 7 Aug 2011 17:36:16 -0700
Message-ID: <58B6F81B4B3F4317B254B4D564F34470_at_bosoheadPC>

Hello Sterling, E.P. and List....

ddly, (and I was shocked to see) the picture in Dodd's Meteorites, Cambridge
Press 1981, page 32, figure 3.1d), shows a type 4 chondrule in Coolidge CV4
which is dominated by the calc-aluminous phase....I don't recall ever seeing
a chondrule in TS with such defined anorthite....or any for that matter;
(it almost looks like euctitic chondritic texture...)

Richard Montgomery



----- Original Message -----
From: "Sterling K. Webb" <sterling_k_webb at sbcglobal.net>
To: <meteorite-list at meteoritecentral.com>
Cc: "E.P. Grondine" <epgrondine at yahoo.com>
Sent: Saturday, August 06, 2011 10:16 PM
Subject: Re: [meteorite-list] CAI inclusions


> E. P.,
>
>> Simple question - what classes of
>> meteorites have CAI inclusions?
>
> Simple answer: any kind of chondrite.
>
> However, most common in carbonaceous
> chondrites, particularly CV's. They contain
> more refractory elements than the "ordinary"
> condrules they are found with. They were
> formed at higher temperatures and many
> show signs of repeated meltings. They are
> older than the next most early solar system
> materials, the chondrules, by 2,000,000
> years or so. Two different dating methods
> give ages of 4567 my and 4571 my.for CAI's.
>
>
> Sterling K. Webb
> --------------------------------------------------------
> 08-07-11, 12:16 AM CDT
> ----- Original Message -----
> From: "E.P. Grondine" <epgrondine at yahoo.com>
> To: <meteorite-list at meteoritecentral.com>
> Sent: Saturday, August 06, 2011 7:12 PM
> Subject: [meteorite-list] CAI inclusions
>
>
>> Hi all -
>>
>> Simple question - what classes of meteorites have CAI inclusions?
>>
>> E.P.
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Received on Sun 07 Aug 2011 08:36:16 PM PDT