Ilmenitite from a soapstone body on the Smrčina Hill near Sobotín

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Acta Mus. Moraviae, Sci. Geol. 107 (2022), issue 2, pages 155-164
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Abstract:

Ilmenitite from a soapstone body on the Smrčina Hill near Sobotín

One fragment of ilmenitite was found in heap material coming from a soapstone quarry on the Smrčina Hill near Sobotín in the Jeseníky Mts. The ilmenitite is composed predominatingly of ilmenite (approximately 70 to 80 % by volume), with magnetite, hematite, talc and clinochlore present in minor amounts. The origin of ilmenitite could be explained as the result of fractional crystallization and subsequent density segregation from a Fe-Ti rich magma. This hypothesis is supported by the distinctive higher magnesium content in ilmenite from the ilmenitite (4.4–4.7 wt.% MgO), whereas metamorphogenic ilmenite from soapstone body rocks quarried on the Smrčina Hill has the lower magnesium content (ca. 0.1 wt.% MgO). This is the first finding of ilmenitite in the Silesicum and probably in the entire Bohemian Massif.

Contact:

Jiří Zimák, Department of Biology, Faculty of Education, Palacký University, Purkrabská 2, 771 46 Olomouc, Czech Republic; e-mail: jiri.zimak@upol.cz
Lukáš Hysek, Krapkova 42, 779 00 Olomouc, Czech Republic; e-mail: hysek.lukas@seznam.cz

Citation:
Zimák, J., Hysek, L., 2022: Ilmenitit z krupníkového tělesa na Smrčině u Sobotína. – Acta Mus. Morav., Sci. Geol., 107, 2, 155–164 (with English summary)
ISSN: 1211–8796