Tectonic studies of igneous rocks in metabasite zone and diorite belt in Brno massif

MAREČEK, Lukáš a Rostislav MELICHAR. Tectonic studies of igneous rocks in metabasite zone and diorite belt in Brno massif. In 13th Meeting of the Central European Tectonic Studies Group. 2015. 2015. ISBN 978-80-7075-880-9.

Základní údaje

Originální název

Tectonic studies of igneous rocks in metabasite zone and diorite belt in Brno massif

Autoři

MAREČEK, Lukáš a Rostislav MELICHAR

Vydání

13th Meeting of the Central European Tectonic Studies Group. 2015. 2015

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Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

PDF soubor Sborníku abstraktů

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-80-7075-880-9

Klíčová slova anglicky

Anisotropy of magnetic susceptibility; AMS; Tectonics; Structural geology; Brno Massif

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Anotace

V originále

Studied area is situated in Brno massif. The metabasite zone and diorite belt (sensu Hanžl & Melichar, 1997) outcrops in the central part of the massif between two granodiorite complexes. Boundaries between rocks could be easily identified in this area. The metabasite zone consists mostly of low metamorphosed basalt and rhyolite dyke. There is the most common types of rock diorite with small bodies of serpentinite in the diorite belt. There is also some special microgranite on the boundary between metabasite zone and diorite belt found by Hanžl & Hrdličková (2011). Anisotropy of magnetic susceptibility (AMS) method was used to try to explain the tectonic relations between rocks in this area. The most frequent fabric has strike of magnetic foliation planes in NE–SW direction with steep dip oriented mostly to the NW and magnetic lineation developed in N–S directions (Figure). That trend can be recognized across all the studied area. That could be a proof of sinistral strike slip in Brno massif described by Hanžl & Melichar (1997). There was also used an analysis of temperature dependence of magnetic susceptibility. This method showed that all fabrics in all rocks in this area are essentially controlled by magnetite with a very small contribution of pyrhotite and hematite.