Articles | Volume 8, issue 4
Solid Earth, 8, 789–804, 2017
https://doi.org/10.5194/se-8-789-2017
Solid Earth, 8, 789–804, 2017
https://doi.org/10.5194/se-8-789-2017
Research article
25 Jul 2017
Research article | 25 Jul 2017

Interpretation of zircon coronae textures from metapelitic granulites of the Ivrea–Verbano Zone, northern Italy: two-stage decomposition of Fe–Ti oxides

Elizaveta Kovaleva et al.

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Short summary
This is a study of unusual coronae textures formed by zircon in granulitic metapelites, Ivrea–Verbano Zone (northern Italy). Zircon coronas occur in two generations: (1) thick (5–20 µm) crescent-shaped aggregates and (2) thin (≤ 1 µm) thread-shaped and tangled coronae. Both are found in the same petrological context, so that the difference between two generations is very conspicuous. Formation of zircon coronae is attributed to the two-stage decomposition of Fe–Ti oxides, a rich source of Zr.