New palaeomagnetic data from the Palaeozoic carbonates of the Moravo-Silesian Zone (Czech Republic): evidence for a timing and origin of the late Variscan remagnetization

GRABOWSKI, Jacek, Ondřej BÁBEK, Jerzy NAWROCKI and Čestmír TOMEK. New palaeomagnetic data from the Palaeozoic carbonates of the Moravo-Silesian Zone (Czech Republic): evidence for a timing and origin of the late Variscan remagnetization. Geological Quarterly. Warszawa, vol. 52, No 4, p. 321-334. ISSN 1641-7291. 2008.

Basic information

• Original name: New palaeomagnetic data from the Palaeozoic carbonates of the Moravo-Silesian Zone (Czech Republic): evidence for a timing and origin of the late Variscan remagnetization
• Name in Czech: Nová paleomagnetická data z paleozoických karbonátů moravskoslezské zóny (Česká republika): evidence pro časové zařazení a původ pozdně variské remagnetizace
• Authors: GRABOWSKI, Jacek (616 Poland), Ondřej BÁBEK (203 Czech Republic, guarantor), Jerzy NAWROCKI (616 Poland) and Čestmír TOMEK (203 Czech Republic).
• Edition: Geological Quarterly, Warszawa, 2008, 1641-7291.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10500 1.5. Earth and related environmental sciences
• Country of publisher: Poland
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 0.892
• RIV identification code: RIV/00216224:14310/08:00027831
• Organization unit: Faculty of Science
• UT WoS: 000262714900003
• Keywords in English: Czech Republic; Moravo-Silesian Zone; palaeomagnetism; remagnetization
• Tags: Czech Republic, Moravo-Silesian Zone, palaeomagnetism, remagnetization
• Tags: International impact, Reviewed

Abstract

Palaeomagnetic studies were carried out in the Devonian to Early Carboniferous carbonates of the Moravo-Silesian Zone: MSZ (Czech Republic) in order to evaluate the timing and origin of late Variscan magnetic overprinting. Sampling localities were spread out along the strike of the MSZ from the SW to NE. Previously published thermal maturity data have demonstrated a significant gradient from SW (burial temperatures 150 to 200 deg.C) to NE of the region (250 to 300 deg.C). A late Variscan remagnetization direction (component A), carried by magnetite, was identified in 6 localities. Three phases of the remagnetization in the MSZ might be distinguished which might be assigned to Early to Late Carboniferous, Late Carboniferous and Early Permian. They are coeval with remagnetization events distinguished in Ardennes. A correlation exists between thermal indices and unblocking temperature spectra of component A. Thermal activation nomograms show that component A might be either a thermoviscous or thermochemical remanent magnetization acquired due to a thermal event (deep burial) of 1 to 10 My duration and stabilized during subsequent up lift. A more ancient component B, identified in the SW part, previously interpreted as primary, is shown to be a synfolding remagnetisation. It indicates 70 deg. clock wise rotations before the acquisition of the component A.

Abstract (in Czech)

viz anglický text

Links

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)