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Re: E Chondrites and Mercury

The book I reviewed in an earlier post (Stellar Evolution)
satisfied me in believing that all enstatites formed in the
early solar system at the sunward side of the asteroid belt. 

There is no need to assume they came from much closer than that.

Mercury does present an anomaly, though. It is so dense that
some large impact event probably blew away most of it's
mantle after it differentiated. It is possible that that
event would have sent out enstatite-like material, but since
it was mostly differentiated matter, I wouldn't expect to see chondrules
unless they represented a recent impact on Mercury that hadn't
differentiated into Mercury's core and mantle at the time of impact.

If this happened, the object would have to have been in an Earth crossing orbit
for these last few billions of years before it fell to Earth. There would
probably still be evidence of objects like that left in such orbits.

Much as I would like to believe that my specimen of Abee came from
Mercury, I don't find that too likely.

WBranchsb@aol.com wrote:
> 
> Hello Everyone,
> 
> Okay, I give up.  I have been searching for a while now trying to find
> scientific papers by scientific minds that provide scientific evidence for the
> planet Mercury as the source of  E chondrites.  One occasionally sees a
> reference to Mercury being the "parent body" of the Es but I can't find
> anything from a reputable scientist.
> 
> I am familiar with the oxygen-depletion formation hypothesis but, is that it?
> I mean, is there anything based upon empirical evidence or at least additional
> postulates which would support the Mercury origin theory?
> 
> -Walter
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