[meteorite-list] blue chondrule in a CM2

From: Zelimir.Gabelica at uha.fr <Zelimir.Gabelica_at_meteoritecentral.com>
Date: Sat, 06 Feb 2010 18:06:22 +0100
Message-ID: <20100206180622.6mfz01tdy1wkgsog_at_w3mail.univ-mulhouse.fr>

Hi List,

Here are 3 pics of a genuine blue chondrule spotted upon breaking a
fagment of the CM2 meteorite Tanezrouft 082 (purchased last June in
Ensisheim, from A. Gouesslain/J.-L. Parodi, the meteorite finders).

See here:

http://www.agab.be/question/question.html

Question: what could be the origin of such a strange turquois-like
blue color ?

Could it be due to some traces of Cu2+ salts neutralizing some
refractory silicates ? (despite tha fact that the presence of Cu was
apparently not reported in the meteorite analysis, see the Met. Bull.
writeup added in the URL).

Or could that just be (sometimes) the natural color of some (ortho)pyroxenes ?

Or olivine ?
However, I don't remember having ever seen any olivine showing such a
"true" blue color. Shouldn't olivine (always?) rather be
"olive-green", whatever its origin (terrestrial or asteroidal) ?

Thanks for sharing your thoughts or expertise.

My best,

Zelimir
Received on Sat 06 Feb 2010 12:06:22 PM PST