Ilmenitit z krupníkového tělesa na Smrčině u SobotínaČlánek v PDF
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.
Jiří Zimák, Department of Biology, Faculty of Education, Palacký University, Purkrabská 2, 771 46 Olomouc, Czech Republic; e-mail: email@example.com
Lukáš Hysek, Krapkova 42, 779 00 Olomouc, Czech Republic; e-mail: firstname.lastname@example.org