...nous n'en connaissons pas la réponse...

"Turquois-blue chondrule" found in a freshly broken fragment of Tanezrouft 082 (CM2), purchased from Goueslain/Parodi, the finders"

what could be the cause of the blue color in that chondrule ?

Indication: TNZ 082 mineral composition, from the writeup as published in "Meteoritical Bulletin":

Tanezrouft 082

Algeria, West Tanezrouft
Found 20 December 2003
Carbonaceous chondrite (CM2)

A single, completely crusted stone, weighing 1012 g, was found. Crust has polygonal cracks (terrestrial alteration), interior is black and slightly friable. Classification and mineralogy (M. Bourot-Denise, MNHNP): small, typically <100 m with few in the 300-800 m size-range, rounded chondrules, abundant angular debris and a few CAIs are set in a very dark matrix. Matrix contains troilite, pentlandite and clusters of framboidal magnetite. Olivine, Fa0.44-64.4, mean Fa14.5±17.0; orthopyroxene, Fs0.92-14.9, mean Fs2.5. Olivines are zoned in FeO-rich chondrules, they contain up to 0.54 wt% CaO in FeO-poor chondrules. Weathering grade is W2/3 (metal is oxidized, sulfide almost intact). Specimens: type specimen 30.2 g, and one polished mount MNHNP; main mass with Annick Goueslain and Jean Luc Parodi.

Zelimir Gabelica.
Répondre ŕ <Zelimir.Gabelica@uha.fr>.