Definitely rutile. This texture with sets of rutile needles oriented in three different directions does occur in certain high-grade garnets (and other minerals). It is commonly interpreted as TiO2 unmixing from the garnet.
Regards,
Juergen Reinhardt
School of Geological Sciences
University of KwaZulu-Natal
Durban, 4000
South Africa
>>> Shauket Baltybaev <[log in to unmask]> 12/8/2011 7:56 PM >>>
Dear colleagues,
I found a strange looking ("rhomboidal" location) inclusions in garnet
(Grt-Pl-Bt-Qtz-Sill metamorphic rock from the Ukraine shield). I have
no idea because I've never seen such a thing before. Here I'm sending
3 photos (thinsection, size of Grt is about 2 mm). Please yours
suggestions and ideas.
Regards,
Shauket
IPGG RAS
St.Petersburf
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