Spinels of the Kontozero volcano-plutonic complex (Kola Peninsula, Russia)
- Authors: Mikhailova J.A.1, Zabavchik N.I.1, Pakhomovsky Y.A.1
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Affiliations:
- Geological Institute, Kola Science Centre RAS
- Issue: Vol CLIII, No 6 (2024)
- Pages: 94-121
- Section: МИНЕРАЛЫ И ПАРАГЕНЕЗИСЫ МИНЕРАЛОВ
- URL: https://journals.rcsi.science/0869-6055/article/view/287027
- DOI: https://doi.org/10.31857/S0869605524060049
- EDN: https://elibrary.ru/NWKLOO
- ID: 287027
Cite item
Abstract
Six minerals belonging to the spinel supergroup were found in rocks of the Kontozero volcano-plutonic complex. In addition to previously known magnetite, chromite, ulvöspinel, magnesioferrite, maghemite, and titanomaghemite were studied. Gradual transitions between magnetite, chromite, ulvöspinel, and magnesioferrite connected with the substitutions Cr3+ + Al3+ + Mg2+ ↔ 2Fe3+ + Fe2+ and Ti4+ + Fe2+ ↔ 2Fe3+. Maghemite and titanomaghemite were formed as a result of the low-temperature oxidation of magnetite and ulvöspinel. These minerals in turn replaced by hematite or by the assemblage of hematite and anatase.
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About the authors
J. A. Mikhailova
Geological Institute, Kola Science Centre RAS
Author for correspondence.
Email: j.mikhailova@ksc.ru
Russian Federation, Apatity
N. I. Zabavchik
Geological Institute, Kola Science Centre RAS
Email: j.mikhailova@ksc.ru
Russian Federation, Apatity
Yа. A. Pakhomovsky
Geological Institute, Kola Science Centre RAS
Email: j.mikhailova@ksc.ru
Russian Federation, Apatity
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