[meteorite-list] CAI inclusions

From: Richard Montgomery <rickmont_at_meteoritecentral.com>
Date: Sun, 7 Aug 2011 17:59:25 -0700
Message-ID: <14F2E813AB9545ACA2DBD15E4B0247A8_at_bosoheadPC>

Hello Sterling, E.P. and List....
Oddly, (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...)

CAI not only prominently CV and CO as aggregates, but within
chondrules......

 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 08:59:25 PM PDT