[meteorite-list] Ultraviolet Space Rocks?

From: almitt2 at localnet.com <almitt2_at_meteoritecentral.com>
Date: Sat, 02 Oct 2010 06:36:16 -0400
Message-ID: <20101002063616.9zoi31s3qqu4kk0o_at_webmail.localnet.com>

Hi David and all,

I'm not a geologist but I suspect that when the thinsections are made
and polarized light is used to reveal the various colors (mineral make
up) of the meteorite that this is in effect about the same thing as
using fluorescent lighting. They also use quite an array of other
systems to breakdown the meteorite into parts that are quite small and
tells them chemical makeup. This is part of telling them what it is and
if it is unique plus scores of other things like weathering, age and so
forth.

I'll let others chime in about this as I may be missing something and
am talking over my head here. All my best!

--AL Mitterling

Quoting David Gunning <davidgunning at fairpoint.net>:

>
> Hi All,
>
> I notice that the "Rocks from Space Picture of the Day", dated about a
> year ago, September 29, 2009, features an unusually remarkable glowing
> fluorescent meteorite. It's described as "an 11.1 g piece of Norton
> County (ASU#523)" where "The large enstatite crystals fluoresce bright
> yellow." Quite an eyeful.
>
> This is an oddball meteorite, I'm guessing, as I haven't seen pictures of
> any other meteorites displaying fluorescent color values. Does this bode
> well for other fluorescent meteorites being found? I mean, are the
> scientists really looking and checking for fluorescent color values in
> meteorites on a systematic basis?
>
> If not, they may be missing the boat.
>
> If you look closely at this picture you may be able to detect, as I do,
> that there apparently are other possible fluorescent color values
> happening, as well. I am referring to the noticable blue/green colored
> fluoresent values below and to the right of the yellow colored enstatite
> and to the upper left of the enstatite area, also.
>
> To my understanding, these may indicate additional minerals with other
> fluorescent color values reacting to utlraviolet light, too.
>
> It's unfortunate that the person who took this picture did not take the
> time and spend the effort to look carefully at their resulting picture.
>
> I wonder what wavelength ultraviolet was used, although I guess it was
> probably shortwave. If so, they may not have exposed the specimen to
> midwave and longwave ultraviolet wavelengths, as well, consequently
> denying themselves (and the rest of us!) valuable ultraviolet reactive
> fluorescent color value information.
>
> Is this simply a situation of sloppy science rearing it's ugly head?
>
> Or does it indicate that ignorance is truly bliss, after all?
>
> Yours for the light,
>
> Dave Gunning
>
>
>
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Received on Sat 02 Oct 2010 06:36:16 AM PDT