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

Kovaleva, Elizaveta; Austrheim, Håkon O.; Klötzli, Urs S.

doi:https://doi.org/10.5194/se-8-789-2017

Articles | Volume 8, issue 4

https://doi.org/10.5194/se-8-789-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/se-8-789-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 8, issue 4

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, Håkon O. Austrheim, and Urs S. Klötzli

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Final revised paper (published on 25 Jul 2017)
Supplement to the final revised paper
Preprint (discussion started on 16 May 2017)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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EC1: 'Explanation why the discussion is closed without review', Roberto Weinberg, 12 Jun 2017
AC1: 'Final response to the editors', Elizaveta Kovaleva, 14 Jun 2017

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.