[meteorite-list] CAI and chondrules

From: Jeff Grossman <jgrossman_at_meteoritecentral.com>
Date: Wed, 30 Sep 2009 18:00:00 -0400
Message-ID: <4AC3D4E0.1040700_at_usgs.gov>

Without answering your questions, don't pay any attention to the
Wikipedia articles on CAIs and chondrules. They are basically useless.
I began to work on them, starting with the chondrules, but it was taking
too much time, so they have languished.

Definitive answers to what caused the formation of CAIs and chondrules
are not known.

Jeff

Francesco Moser wrote:
> Hello!
> I take a look on wikipedia about CAI and chondrules, but I have still
> some doubt.
>
> http://en.wikipedia.org/wiki/Calcium-aluminium-rich_inclusion
> http://en.wikipedia.org/wiki/Chondrule
>
> What prompted the formation of CAI? and what's caused the formation of
> chondurles???
> The supernova gave the energy for the formation of CAI and for the
> collapse of the solar nebula?
> Some other energy source, still unknow, 2 million years later molten
> the material which formed the chondrules? But wich type of energy source?
>
> Is correct this time line?
>
> 1) supernova
> 2) few time later CAI formation
> 3) at the same time collapse of nebula
> 4) 2My later condrule formation
> 5) at the same time proto-sun and proto-planetary formation
> 6) ...
>
> Thanks a lot!
>
> Best regards!
>
> <>X<>X<>X<>X<>
> Francesco Moser
> IMCA #1510
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-- 
Dr. Jeffrey N. Grossman       phone: (703) 648-6184
US Geological Survey          fax:   (703) 648-6383
954 National Center
Reston, VA 20192, USA

Received on Wed 30 Sep 2009 06:00:00 PM PDT