Magnetic properties of high-Ti basaltic rocks from the Krušné hory/Erzgebirge Mts. (Bohemia/Saxony), and their relation to mineral chemistry

0340715 - GLÚ 2010 RIV CZ eng J - Journal Article
Schnabl, Petr - Novák, Jiří Karel - Cajz, Vladimír - Lang, Miloš - Balogh, K. - Pécskay, Z. - Chadima, Martin - Šlechta, Stanislav - Kohout, Tomáš - Pruner, Petr - Ulrych, Jaromír
Magnetic properties of high-Ti basaltic rocks from the Krušné hory/Erzgebirge Mts. (Bohemia/Saxony), and their relation to mineral chemistry.
Studia geophysica et geodaetica. Roč. 54, č. 1 (2010), s. 77-94. ISSN 0039-3169. E-ISSN 1573-1626
R&D Projects: GA AV ČR IAA300130706
Institutional research plan: CEZ:AV0Z30130516
Keywords : high-Ti basaltic rocks * magnetic petrology * thermomagnetic experiments * Curie temperature variation * field-dependent susceptibility * Ohře/Eger Rift
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 1.123, year: 2010

Cenozoic Ti-rich basaltic bodies (3.5 -5.2 wt% TiO₂ in whole rock analyses) are grouped in the broader vicinity of the Loučná-Oberwiesenthal volcanic centre and spinel group minerals (mainly titanomagnetite population with 12.7-20.1 wt.% TiO₂) play a major role in rock magnetism. Recrystallized dusty Ti-magnetite from decomposed olivine and symplected magnetite-diopside occur rarely. Magnetomineralogic methods can detect the TiO₂ content in titanomagnetite series using variations in Currie temperature, field-dependent susceptibility, and variations in the IRM spectra. Understanding of the factors that determine magnetization intensities within the target area is essential for reliable interpretation of magnetic anomalies and subsurface geology.
Permanent Link: http://hdl.handle.net/11104/0183902