One of the papers on density and porosity can be downloaded here:
http://homepage.mac.com/brother_guy/.Public/Asteroid%20Densities.pdf
directly from Brother Guy's webpages
More references:
CONSOLMAGNO G.J. et al. (1977) Composition and evolution of the eucrite
parent body: evidence from rare earth elements (GCA 41, 1271-1282).
BRITT D.T., CONSOLMAGNO G.J. (1996) Estimating porosities from bulk
densities (abs. Meteoritics 31, 1996, A022).
CONSOLMAGNO G.J. et al. (1996) Density and porosity measurements of the
Vatican meteorite collection (abs. Meteoritics 31, 1996, A031).
CONSOLMAGNO G.J. et al. (1997) Model porosities of chondrites and the
nature of asteroidal material (MAPS32, Suppl., A031-A032).
CONSOLMAGNO G.J. et al. (1998) Metamorphism, shock, and porosity: Why
are there meteorites? (Meteoritics 33-4, 1998, A034).
CONSOLMAGNO G.J. et al. (1998) The porosities of ordinary chondrites:
Models and interpretation (MAPS 33-6, 1998, 1221).
CONSOLMAGNO G.J. et al. (1998) The density and porosity of meteorites
from the Vatican collection (MAPS 33-6, 1998, 1231-1241).
Another paper on asteroid densities:
http://adsabs.harvard.edu/full/1999M%26PS...34..479W
Densities of Martian meteorites:
http://gsa.confex.com/gsa/2002AM/finalprogram/abstract_40458.htm
A short summary paper:
http://www.lpi.usra.edu/meetings/metsoc2001/pdf/5171.pdf
Sterling K. Webb
-----------------------------------------------------------------------------------------
----- Original Message -----
From: "David Gunning" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>
Sent: Thursday, September 30, 2010 7:08 AM
Subject: [meteorite-list] [Fwd: RE: Specific Gravity Question]
--------------------------- Original
Message ----------------------------
Subject: RE: [meteorite-list] Specific Gravity Question
From: "David Gunning" <[email protected]>
Date: Thu, September 30, 2010 7:55 am
To: "Peter Scherff" <[email protected]>
-------------------------------------------------------------------------
Howdy,
Thanks for the e-burp.
There was no link, however, to the "published data for hundreds of
meteorites", mentioned in your e-burp. Why allude to information that
cannot be referenced and verified?
While it's interesting to read of your specific gravity bead method,
there are other less convoluted ways or dealing with the fear of
potential contamination in meteorites and mineral samples, in general.
What particularly interests me is exploring ways and utilizing lower
tech
methods that bring the ordinary collector into the the loop.
Your suggested method would seem to exclude that possibility.
Hi,
Here is the way around contamination
http://www.psrd.hawaii.edu/Aug99/densityMeasure.html. Guy Consolmagno
has
published data for hundreds of meteorites.
Peter
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
David
Gunning
Sent: Thursday, September 30, 2010 6:46 AM
To: [email protected]
Cc: [email protected]
Subject: [meteorite-list] Specific Gravity Question
Hi All,
I'm a confessed specific gravity advocate for all things
mineralogical,
including meteorites. It seems to me that there is very little
useful
specific gravity information on the web concerning meteorites, with
the
singular exception of Randy L. Korotev', excellent website at
Washington
University in St. Louis; an informative website listing various
specific
gravity values for various meteorite types and classifications.
It occurs to me that many people may not be taking specific gravity
measurements of their meteorite specimens because of some sort of
biased
but unfounded fear of specimen contamination. Is this true?
One of the benefits of measuring specific gravity is in being able to
spot density anomalies in meteorites. For example, you procure a
small
meteorite specimen of a meteorite has been classified as an "L"
ordinary
stoney chondrite, with a range of specific gravity values, as found
on
Professor Korotev' s.g. list, of between 2.50 and 3.96 (with an
average
s.g. of 3.35). When you, yourself, measure the specific gravity of
your
L chondrite, and it's s.g. value comes in at 4.06, what does that
mean?
Would such a s.g. reading #1: be possible? And #2: be meaningful?
Are meteorite specific gravity values exclusively constrained to the
range of values that the scientists peg them at?
And, if not, if actual specific gravity measurements cam occur
outside
the conventionally accepted range of values of the "experts", should
anyone give a hoot one way or another?
Best wishes,
Dave Gunning
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