[meteorite-list] Cometary meteorites

[gd Knox]

On Tue, Nov 23, 2010 at 2:48 PM,  <lebofsky at lpl.arizona.edu> wrote:
> Hi:
>
> I have said this to you before that there is about zero evidence that
> carbonaceous chondrites are from comets. There is only minimal evidence
> that there are hydrated silicates in comets and at least the CI and CM CCs
> very much aqueously altered and are consistent with an origin from C, B,
> and G (and maybe D) asteroids.
>
> Larry
>
>> Hello Elizabeth, all -
>>
>> The general informal consensus within the meteorite community has been
>> that carbonaceous meteorites are cometary in origin. That being the case,
>> a few questions:
>> 1) At what compression/temperature will CO2 dissociate into Carbon and
>> Oxygen?
>> 2) Will Epoxi provide fine spectra data for trace elements such as calcium
>> and aluminum? Platinum Group Elements?
>>
>> E.P. Grondine
>> Man and Impact in the Americas
>>
>>
>>
>>
>>
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>
>
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CcAl Si 's .... Don't expect much out of these "museum " curators...
Feldspars are thought to be "QUARTZ". no education.or should i say
...oh well... go figure... GDX
sh