[meteorite-list] Making meteorite thin sections.

From: Starsinthedirt at aol.com <Starsinthedirt_at_meteoritecentral.com>
Date: Fri, 21 May 2010 20:11:46 EDT
Message-ID: <89601.4c0d904d.39287b42_at_aol.com>

I must agree with Anne on this one.

Most (almost all) of my micrographs on my Meteorite Times Meteorite
Micrograph Gallery were of thin sections loaned from Jeff Hodges. He and Anne
combine efforts getting the best thin sections in the world made.

Because of the relatively high magnification I use, Jeff arranged for the
polished (uncovered) thin sections to all be polished to 1/4 micron on both
sides.

With out this level of quality, those eye popping images would not be
possible.

So this is an endorsement of Anne's thin sections and not an ad.

That being said, making thin sections is kind of a fun challenge that
every one should try at least once. I have made several to get a quick look
at some thing but I must admit, I have never been able to get a good
micrograph from any of my handy work.

Tom Phillips

In a message dated 5/21/2010 5:50:42 P.M. Mountain Daylight Time,
Impactika at aol.com writes:
Yes Ed,

As Ryan explained, thin-sections must be exactly 30 microns thick, not 29
or 31, and from edge to edge, not just here and there.
If you don't have the specialized and very expensive equipment you will
waste a lot of material and a great deal of time.
May I suggest buying those thin-sections ready made, by the world expert
in
thin-sections?

And yes, I do have the largest selection.
Should this be considered an Ad? or public information? ;-)

Anne M. Black
_http://www.impactika.com/_ (http://www.impactika.com/)
_IMPACTIKA at aol.com_ (mailto:IMPACTIKA at aol.com)
Vice-President, I.M.C.A. Inc.
_http://www.imca.cc/_ (http://www.imca.cc/)


In a message dated 5/21/2010 4:25:21 PM Mountain Daylight Time,
ryan.weidert at gmail.com writes:
Hi Ed,
Thin sections are a bunch of work and have to be withing pretty
strict parameters to let light through correctly. Although I've never
made one myself before, I have friends whom have had to make hundreds
for their masters/PhD projects and its pain, unless you like grinding,
glueing, grinding. When done correctly, and with polarized light, the
results (depending on the minerals) can be absolutely astounding
natural work of art.

Here's a link I came across on how to make one.
http://almandine.geol.wwu.edu/~dave/other/thinsections/

good luck!

If you don't feel you're up to the task of making them, you can send
rock/meteorite samples to be made for you, but of course its money,
and the wait can be pretty long (months) to get them back.

-ryan


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Received on Fri 21 May 2010 08:11:46 PM PDT