Interesting to note: I've just re-re-read Robert T. Dodd's METEORITES, A
Petrologic-Chemical-Synthesis published 1981...and as early as the
Introduction (page 9) the concept of lunar meteorites was at that time
completely ruled out:
"Although returned samples confirmed that the lunar maria consist of
basaltic rocks, lunar basalts differ sufficiently from analogous achondrites
in composition and age to rule out a common sourse (Section 8.1), and other
lunar rocks are completely different from known meteorites. Some meteoritic
material is present in the lunar regolith, but the converse is not true:
There seems to be no lunar component in terrestrial meteorite collections."
WOW! As recently as only 30 years ago, with advanced analysis, meteoritic
specimens were un-notoiced.
List: I found this early edition (awesome book) by asking everyone to
recommend a source for meteoritic chemistry/petrology and it has been a gem
to read, but as well to witness the changes since.
Of course, I will look for further editions. Time-Machine!!!
I'd love further refernce sources, so please chime in.
-Richard Montgomery
----- Original Message -----
From: "Sterling K. Webb" <[email protected]>
To: "Michael Fowler" <[email protected]>;
<[email protected]>
Cc: "Michael Fowler" <[email protected]>
Sent: Thursday, August 04, 2011 6:22 PM
Subject: Re: [meteorite-list] Mercury Fragments on earth (not)
There was a time when you could say: "The fact that
Lunar meteorites have not been found on Earth is
prima facie evidence that there are none."
There was a time when you could say: "The fact that
Martian meteorites have not been found on Earth is
prima facie evidence that there are none."
Humans have stared at both and had no idea of what
they were looking at. Martians were frequent enough
to get and maintain a class all their own for centuries
before we knew, and Lunars we probably just tossed
over our shoulders without a thought.
I say:
This is a time when you (or I) can say: "The fact that
Mercurian meteorites have not been found on Earth is
prima facie evidence that we can't recognize them!
We don't know what they are. We are probably quite
wrong about what to expect."
Sterlng K. Webb
------------------------------------------------------------------------
----- Original Message -----
From: "Michael Fowler" <[email protected]>
To: <[email protected]>
Cc: "Michael Fowler" <[email protected]>
Sent: Thursday, August 04, 2011 7:45 PM
Subject: [meteorite-list] Mercury Fragments on earth (not)
http://arxiv.org/ftp/arxiv/papers/0801/0801.4038.pdf
They concluded that there should be a number of meteorites of
Mercurian origin already here -- around 1/3 to 1/2 the number which
originated from Mars.
The fact that Mercurian meteorites have not been found at 1/2 to 1/3 the
number of Martian meteorites is prima facie evidence that their
calculations are wrong.
Mike Fowler
Chicago
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