Projects:
High-resolution continental paleoclimate record in the Lake Baikal - A key-site for Eurasian teleconnections to the North Atlantic Ocean and monsoonal system
(CONTINENT Project supported by the European Commission Framework Programme V for 2003-2004)
Aims: paleomagnetic dating and correlation of sedimentary cores drilled on the Academician Ridge located in the Northern Baikal Basin, detection of environmental record from the sedimentary cores spanning last ca. 200 ka.
Approach: paleomagnetic record, MS and AMS measurements.
Results are in progress.
Magnetostratigraphy and mineral magnetic study of cave and river deposits in the central Europe
(project supported by the Grant Agency of the Academy of Sciences CR)
Aims: paleomagnetic dating of cave deposits preserved in karst areas in the Czech Republic Slovakia, Hungary, Slovenia and Poland.
Approach: remanence polarity measurements both in clastic and chemogenic cave deposits; magnetostratigraphic interpretations are verified by U-series datings of speleothems (conducted in Poland), AMS measurement for reconstruction of paleocurrent directions, MS and MS temperature dependence for determination of mineral magnetic content controlled by erosion and weathering processes.
Results:
Bosák, P., Pruner, P., Kadlec, J., 2003: Magnetostratigraphy of cave sediments: Application and limits.- Stud. Geophys. Geod., 47 (2003), 301-330.
Kadlec J., Pruner P., Chadima M., 2003: Magnetostratigraphy and mineral magnetic properties of cave deposits preserved in cave systems located in the Nízké Tatry Mts. (Slovakia).- Abst. EGS-AGU-EGU joint Ass., Nice 2003.
Bosák, P., Bella, P., Cílek, V., Ford, D.C., Herman, H., Kadlec, J., Osborne, A., Prunel, P., 2002: Ochtiná Aragonite Cave (Western Carpathians, Slovakia): morphology, mineralogy of the fill and genesis. Geol. Carp., 53(6), 399-410.
Magnetic study of deposits precipitated from thermal and cold springs
(Barrande Project supported by the Ministries of Education of the France and Czech Republic)
Aims: Study of mineral magnetic properties of carbonate deposits precipitated from thermal and cold springs and cave waters in dependence on environmental conditions (climate, human impact).
Approach: AMS (KLY-4S), ARM (LDA3- AMU1), MS - high temperature dependence (KLY-4S and CS-3 Furnace Apparatus in argon atmosphere), MS - low temperature dependence (KLY-4S and CS-L Low Temperature Apparatus), granulometry of magnetic grains (KLY4S Kappabridge), microprobe (CAMECA), X-ray diffraction (X´Pert APD Philips Diffractometer).
dating by Th/U method (α counting) – will be conducted by the Institute of Geological Sciences, Polish Academy of Science, Warszaw.
Results: project submitted and proposed to start in 2004.
Czech-Slovenian Joint Programme ”KONTAKT” (ministry of Education, Youth and Sports CR) No. 2002/009: Methodology and attempts of dating of karst fillings in the Limestone Complex (Slovenia) by means of palaeomagnetism
Aims: paleomagnetic dating of cave deposits preserved in karst areas in the Czech Republic Slovakia, Hungary, Slovenia and Poland.
Approach: remanence polarity measurements both in clastic and chemogenic cave deposits; magnetostratigraphic interpretations are verified by U-series datings of speleothems (conducted in Poland), AMS measurement for reconstruction of paleocurrent directions, MS and MS temperature dependence for determination of mineral magnetic content controlled by erosion and weathering processes.
Results:
Bosák, P., Herman, HG., Mihevc, A., Pruner, P., 2002: High resolution magnetostratigraphy of speleothems from Snežna Jama, Jamnik-Savinja Alps, Slovenia.- Acta Cars., 31(3), 15-32.
Other projects:
Limited studies aimed at derivation of the palaeo-intensity of the geomagnetic field (on porcellanites, palao-slags, etc., products of combustion of coal seams).
Investigation of magnetic properties of metastable minerals (greigite, smythite) in rocks containing micro-organic matter and potential for development of hydro-carbons. These studies are essential and applicable to assessment of hydro-carbon potential in respective regions. The studies were carried out on rocks from Bohemia, Slovakia, Spain, Hungary and Estonia.
Results:
Krs M., Krsová M., Pruner., Zeman A., Novák F., Jansa J. (1990): A petromagnetic study of Miocene rocks bearing microorganic substance and magnetic mineral greigite (Sokolov and Cheb Basins, Czechoslovakia). Phys. of the Earth and Planetary Interior, Elsevier Sci. Publ., 63, 98-112, Amsterdam.
Krs M., Novák F., Krsová M., Pruner P., Kouklíková L., Jansa J. (1992): Magnetic properties and metastability of greigite-smythite mineralization in Brown-coal Basins of the Krušné Hory Piedmont, Bohemia. Phys. Earth Planet. Inter., 70: 273-287, Amsterdam.